Ink, method of jet printing, printing unit, ink cartridge and printing device for jet printing

FIELD: polygraphic industry.

SUBSTANCE: invention is attributed to ink for jet printing. Ink for jet printing is described which ink includes coloring substance with formula (I), or its salt, (I) where: M - hydrogen atom, alkaline metal, alkali-earth metal or cation or ammonium ion of organic amine; n - integer 1 or 2, and water-soluble organic solvent, selected from the group including ethylene glycol, diethylene glycol, 2-pyrrolidone, 1,5-pentanediol, 1,6-hexanediol and ethylene-carbamide, in the quantity of 50 wt % or more relative to content of all organic solvents in the ink. Suggested yellow ink has enhanced humidity resistance and color hue stability due to lowered migration.

EFFECT: obtaining ink with enhanced humidity resistance and color hue stability.

7 dwg, 10 tbl, 21 ex

 

The technical field to which the invention relates

The present invention relates to inks for inkjet printing, having a good property dyeing, good moisture resistance and high reliability, a method of inkjet printing, pachatusan unit, ink cartridge and the printer for inkjet printing.

Prior art

Method of inkjet printing is a printing method involving applying droplets of ink on any of the printed media, such as ordinary paper and glossy media to form images and quickly found wide application due to lower costs and increase printing speed. With the rapid proliferation of digital cameras and cameras, as well as improving the quality of the images obtained in this way, he has found application as a method of producing photographic images, comparable to a photo, obtained by using silver halide.

In recent years, the image quality has improved, even in spite of the reduction of the size of ink droplets and better color, envisaged with the introduction of multi-color ink. Meanwhile, demand in the coloring material and the ink has grown, so tightened requirements, for example, such properties in the context of what krasivaya and reliability, as the adhesion and stability of projection.

In comparison with photograph, obtained by using silver halide, a method of inkjet printing creates problems, for example, in the sense of sustainability save the image of the finished printed product. Generally speaking, a printed product obtained by a method of inkjet printing, sustainability, saving the image is inferior to the pictures, obtained by using silver halide, and causes the problem lies in the fact that the coloring material printed on the product tends to deteriorate, which causes a change in the color tone and discoloration of the image when printed product is exposed to light, humidity, heat, ambient gas present in the air, etc. for a long period of time. To solve the problem, suggested a large number of technical solutions.

Generally speaking, the method of ink jet printing involves the use of ink, each of which have a tinge of yellow, bright red, blue, black and other colors. Hitherto it was believed that among these ink yellow ink should be improved in light fastness, water resistance, moisture resistance, etc. To improve these properties is proposed, for example, to use a coloring material having a specific structure, such as the sight of the purposes of the reference dye (C.I.) direct yellow dye (Direct Yellow) at number 173 (C.I. Direct Yellow 173) or reference dyes direct yellow dye number 86 (C.I. Direct Yellow 86) (see, for example, document JP-A 02-233781 and JP-A 04-233975). The use of such a coloring material, as mentioned above, shows a significant improvement of light fastness, water resistance and moisture resistance, but the color tone, the property of staining, reliability, etc. are not at satisfactory levels.

Also the proposed use is presented in reference dyes direct yellow dye number 132 (C.I. Direct Yellow 132) as any of the materials such as the yellow ink and the coloring material for the ink set (see, for example, document JP-A 11-29729 and JP-A 2001-288391). Although this coloring material is often used to get ink for inkjet printing because of its appropriate properties coloring this coloring material causes the problem lies in the fact that he has extremely poor water resistance.

Also proposed the use of coloring material having a specific structure, to improve the moisture resistance (see, for example, document JP-A 11-217529), and the use of the ink set multiple colors to enhance the moisture resistance (see, for example, document JP-A 11-180028).

Each of these proposals attempt to stand is to increase the moisture resistance, but based only on the structure of the coloring material. In other words, neither the proposal to increase the resistance by means of coloring material having a specific structure, nor the proposal to increase the resistance by means of a set of ink of multiple colors may not prevent migration, i.e. the deterioration of image quality due to change hue in this environment, as the environment of high temperature and high humidity.

Also proposed the synthesis of a new coloring material having moisture resistance, light resistance, water resistance, as well as providing shade and clarity, suitable for inkjet printing (see, for example, document JP-A 2003-321627). However, even when using such a coloring material cannot reach the level of moisture resistance required in some cases when the implementation of a modern method of inkjet printing.

A brief statement of the substance of the invention

The technical task of the present invention is to improve the moisture resistance, which is the most important factor in the coloring material having a yellow tinge, and a yellow ink, excellent and staining property and moisture resistance.

The coloring material used in conventional yellow ink for inkjet printing, inclined to the reduced moisture resistance, and mentioned coloring material is prone to deterioration of the properties of the painting, when the coloring material has good moisture resistance. Generally speaking, the coloring material having a large molecular weight, it is difficult to move in the printed media information, when a coloring material comes into contact with excessive moisture after this coloring material is fixed on the printed media information. In the result, it is possible to improve moisture resistance. Meanwhile, a coloring material having a large molecular weight, has a structure in which a large part, not involved in the painting, which reduces the efficiency of staining in terms of unit mass. Therefore, when using the coloring material with a high molecular weight and good moisture resistance, the property of staining should be satisfactory. In other words, it is necessary to achieve compatibility between the property of staining and moisture in the ink containing coloring material, yellow color, to increase the resistance of saving the image of the printed product inkjet printing up to the level typical for the pictures, obtained by using silver halide, or a higher level.

Extensive investigations have been made to discover the mechanism by which the change of the color tone of the printed product due to migration, and to prevent the migration. In particular, studies have been conducted with the aim to find a specific ink composition, the presence of which in the printed product obtained by using the ink, detects a change in its color tone due to migration. In the result it was found that the occurrence of migration depends mainly on the presence or absence of specific water-soluble organic solvent. It is proven that migration occurs when water-soluble organic solvent remaining in the printed product, absorbs moisture in the air, present in the environment with high temperature and high humidity.

The present invention is based on the above research results, attention was focused on the image formed on the medium of printed information, the difference between the component of the ink before the formation of the image component and a water-soluble organic solvent remaining in the printed media information after the formation of the image, and considered the relevant properties of the water-soluble organic solvent in the ink. The result was discovered the mechanism by which changes colour tone due to migration occurs due to the difference in the properties of the water-soluble org the organic solvent, remaining in the printed product. Then it was concluded that the change in color tone due to migration depends on the total amount of water-soluble organic solvent remaining in the printed product, and from property, in accordance with which the water-soluble organic solvent, essentially contains water molecules. Extensive investigations have been made in connection with this feature, complete the creation of the present invention.

As described above, it was found that migration is caused by the interaction between the moisture resistance of the coloring material and water-soluble organic solvent.

Therefore, the main task of the present invention to provide a novel method of suppressing changes colour tone due to migration, while paying attention to the amount of water-soluble organic solvent present in the printed product.

Another object of the present invention to provide an ink excellent in moisture resistance and properties such as the stability of the intermittent ejection, as an ink for inkjet printing.

Another object of the present invention to provide an ink excellent in moisture resistance, stability, intermittent ejection, image density and color tone.

These objectives decide what I'm using the present invention, described below. That is, in accordance with one aspect of the present invention proposed an ink for inkjet printing containing at least a coloring material and a water-soluble organic solvents inks are characterized by the fact that they satisfy the following conditions (a) and (b):

(A) color contrast ΔE, the judgment of which pass by way of making judgments about the properties of the coloring material is 9 or less, and the above-mentioned method of judging includes steps (1)to(3): in which

1) application simulating ink containing a coloring material, water and a water-soluble organic solvent having a speed X evaporation (wt.%), less than the rate of evaporation of water, and the ratio Y of moisture absorption (wt.%), which is 20 or more and satisfies the relation Y≥2,8X+10, and applying transparent ink obtained by replacing only the coloring material simulating ink with water in such amount that the number of simulation ink is less than the amount of transparent ink;

2) keeping the printed product obtained in stage (1) in an environment at a temperature of 25°C and humidity of 60% for 48 hours, followed by keeping this printed product in an environment at a temperature of 30°and 80% humidity for 168 hours;

3) making judgments about color contrast (Δ (E)represented by the following expression (1), between the printed product before curing for 168 hours and the printed product after conditioning for 168 hours:

ΔE=√((L1-L2)2+(a1-a2)2+(b1-b2)2)(1)

where: L1, a1and b1represent parameters L, a and b calorimetric system Lab after conditioning for 48 hours before and keeping within 168 hours, respectively; L2, a2and b2represent parameters L, a and b calorimetric system Lab after conditioning for 168 hours;

(C) the content of water-soluble organic solvent, in which the speed of X evaporation (wt.%) and the ratio Y of moisture absorption (wt.%) meet the value specified in the following expression (2), all water-soluble solvents in the ink is 50% by weight of or more:

Y<2,8X+10(2)

where: X represents the evaporation rate, Y is the coefficient of moisture absorption.

In another aspect of the present invention, a method of inkjet printing, characterized by the fact, is that it provides for the step of the above-described ejection of ink by way of inkjet printing.

In accordance with another aspect of the present invention proposed an ink cartridge, characterized in that it includes a portion for storing ink for inkjet printing.

In accordance with another aspect of the present invention proposed the printing unit, characterized in that it includes a portion for storing ink for inkjet printing and the print head to eject the ink.

In accordance with another aspect of the present invention proposed printer inkjet, characterized in that it includes a portion for storing ink for inkjet printing and the print head to eject the ink.

In accordance with the present invention can be developed yellow ink for inkjet printing, which satisfy the requirements of the property of the coloring, which should have the ink for inkjet printing, and have high moisture resistance even when letters are printed by ink on a variety of printed media, as well as a method of inkjet printing, the printing unit, the ink cartridge and device for inkjet printers, each of which provides for the use of the above ink.

Brief description of drawings

The invention is further explained in the description of predpochtitel the s variants of the embodiment with reference to the accompanying drawings, on which:

Fig. 1 depicts a diagram of the relationship between evaporation rate and coefficient of moisture absorption according to the invention;

Fig. 2 - General view of the printing device according to the invention;

Fig. 3 is a General view of the mechanical parts of the printing device according to the invention;

Fig. 4 - section of the printing device according to the invention;

Fig. 5 is a perspective view of the device in which the capacity of the ink is installed on the cartridge head according to the invention;

Fig. 6 is a perspective view of the device with the spatially separated parts of the cartridge head according to the invention;

Fig. 7 is a front view illustrating the substrate with the printed elements on the cartridge head.

Description of the preferred embodiments of the invention

In the present invention, when the connection is salt causes dissociation of this salt with the formation of ions in the ink, and this state for convenience characterized by the expression "contains salt.

Ink

It was determined that migration is the result of interaction between the resistance of coloring material and a water-soluble organic solvent. Below is a detailed description of the component included in the ink composition of the present invention.

Coloring material

Cernelle inkjet printing (sometimes hereinafter referred to simply as "ink"), relevant to the present invention must contain a coloring material having a color contrast (Δ (E)judgment about which pass by way of making judgments about the properties of the coloring material constituting 9 or less.

Method of making judgments about the properties of the coloring material

Method of making judgments about the properties of the coloring material in the present invention includes the steps (1)to(3). Below is a more detailed description of these stages with their division into the following steps (a)-(g).

(a) Obtaining simulating ink and transparent inks

Receive simulating ink containing a coloring material, water and a water-soluble organic solvent having a speed X evaporation (wt.%), less than the rate of evaporation of water, and the ratio Y of moisture absorption (wt.%), which is 20 or more, and satisfies the relation Y≥2,8X+10 or, preferably, Y>2,8X+10 (in the technical sense of the relationship Y≥2,8X+10 will be explained below), and the transparent ink is obtained by replacing only the coloring material in the above composition of the water. When this ink composition are the conditions under which migration does not occur. It is important that the composition satisfies the above conditions, because the purpose of this part is made is of judgments about the properties (especially moisture resistance) of coloring material.

Speed X evaporation (wt.%) in the present invention is determined as follows: placed 5 g of water-soluble organic solvent in the cuvette having an outer diameter of 31 mm and a height of 15 mm; leave this cell to stand still in an environment having a temperature of 60°and a humidity of 10%for 192 hours; again measure the mass of the water-soluble organic solvent and determine the evaporation rate based on the reduced mass of the water-soluble organic solvent. The coefficient Y of moisture absorption (wt.%) determined in the following way: placed 5 g of water-soluble organic solvent in the cuvette having an outer diameter of 31 mm and a height of 15 mm; leave this cell to stand still in an environment having a temperature of 30°C and humidity of 80%for 192 hours; again measure the mass of the water-soluble organic solvent and determine the coefficient of moisture absorption on the basis of the increased mass of the water-soluble organic solvent.

Simulating ink were prepared in accordance with the following composition, in which he used the glycerin and urea as water-soluble organic solvents, Acetylenol E-100 (produced by the company Kawaken Fine Chemicals Co., Ltd.) as surface-active substances is presented in reference dyes direct yellow dye number 132 (C.I. Direct Yellow 132) as a coloring material. Table 1 shows the speed X of evaporation (wt.%) for each of the substances such as glycerol and urea, as well as speed X evaporation (wt.%) water (pure water). The following table 1 demonstrates that each of the substances such as glycerol and urea, corresponds to a water-soluble organic solvent having an evaporation rate less than the rate of evaporation of water, and the coefficient of moisture absorption of 20 wt.% or more.

Table 1
Composition (wt.%)Evaporation rate (wt.%)The coefficient of moisture absorption (wt.%)
Glycerin10,00,066,9
Urea10,00,186,0
Acetylenol

E-100
1,0--
C.I.Direct

Yellow 132
3,0--
Clean water76,0100,0-

(b) creating an image for evaluation

Simulating ink and transparent inks thus obtained were superimposed on each other to get the image for evaluation. Although this image can in order to have any utilization of ink when printing, overlay simulating ink and transparent inks each other is important. The reason for this, given the condition of the printed product in the real environment, is that the print in General is rarely carried out by any one type of ink. In other words, we can say that migration occurs in the presence of a few ink. It is therefore important to create an image for evaluation by overlaying each other simulating ink and transparent inks in order to reproduce such a situation. In addition, the number of the applied modeling of the ink is preferably less than the amount of transparent ink. The reason is that, when the image for evaluation create by imposing on each other simulating ink and the transparent ink in the above-described conditions, the amount of applied water-soluble organic solvent with respect to the coloring material printed on the media information increases, resulting in occurrence of migration is more likely. This approach allows to establish more clearly the difference in some property (in particular, moisture resistance) between the coloring material, so that you receive an opportunity to more clearly evaluate the properties (in particular, moisture resistance) of the target abrasivos the first material. In the present invention was used in the above simulation ink and the above-described transparent ink, and the range of utilization of each of them varies from 5% to 100% in increments of 5%to create an image for evaluation, which simulates ink and transparent inks were superimposed on each other.

In the present invention the evaluation of the properties, in particular the resistance of the coloring material does not require a particular printing device media or printed information. To the extent that printing device capable of causing the ink on the printed media information and media printed information can absorb ink to form a printing device or media printed information there are no restrictions. A specific example of such a printing device includes a printing device, comprising storing the ink portion for storing ink and a printhead to eject ink.

(C) Creating an image for evaluation in the initial standard state

Shall take measures conducive to evaporation and water-soluble organic solvent and water present in the image for evaluation, created as described above. The image for evaluation left in an environment having a temperature T1°and the humidity H1%within a certain period of time for action, promoting evaporation and water-soluble organic solvent and water present in the image for evaluation. In the result, you can create the image for evaluation in the initial standard state. To take measures conducive to evaporation and water-soluble organic solvent and water present in the image for evaluation, it is important to reduce absolute water content characteristic of the environment in which the image for evaluation.

Although it is important to keep the image for evaluation in the environment having a temperature T1°and the humidity H1%within a certain period of time, this period can be arbitrary. In particular, this period is preferably such that the evaporation and water-soluble organic solvent and water from the inside of the image for evaluation is reduced, and the weight image for evaluation becomes constant. For example, the inventors have shown that evaporation and water-soluble organic solvent and water from the inside of the image for evaluation reaches essentially equilibrium for 48 hours, and the weight of the image for evaluation is becoming a constant in the environment having a temperature T1=25°and the humidity H1=60%, and these temperature and humidity elect from the state of the printed products is that in the environment.

When the image for evaluation is left for a period that is less than 48 hours, evaporation and water-soluble organic solvent, and water does not reach equilibrium, and therefore it is expected that in the image evaluation are either water-soluble organic solvent or water. In the initial standard condition is not stabilized and there is a possibility that the state of occurrence of migration will change, and the accuracy of judgments about water resistance will decrease. When the image for evaluation is left for a period greater than 48 hours, the initial standard state can be stabilized, but you can anticipate that you will have to take additional measures to promote evaporation and water-soluble organic solvent, and water. This reduces the amount of water-soluble organic solvent remaining in the image for evaluation, in which it can be expected that water-soluble organic solvent will cause migration, and reduces the amount of water-soluble organic solvent, able to absorb moisture. Therefore, the occurrence of migration becomes unlikely. For the above reasons, the image for evaluation in the preferred embodiment, left in an environment having a temperature T1=25°and the humidity H1=60%,within 48 hours. Under the above described conditions, it is expected that it will be possible to implement evaporation and water-soluble organic solvent, and water, while maintaining the state of the printed product in the real environment. It should be noted that the absolute content of water present in the environment having a temperature T1=25°and the humidity H1=60%, is about 13.8 g/m3.

(g) Measurement of color tone of the image for evaluation in the initial standard state

Measured hue values (La*b*in the color space, the standardized CIE (CIE - International Commission on illumination (values La*b*MCOs)) obtained by the above image for evaluation in the initial standard state. This measurement is intended for the numerical determination of the colour tone of the image for evaluation in initial standard condition, stored for some period of time. In the present invention, the color tone of the image for evaluation in the initial standard state was measured by a spectrophotometer (Spectrolino (trade mark), manufactured by the company Gretag Macbeth).

(d) creating an image for evaluation after the acceleration test

The image for evaluation in the initial standard state created the above image, leave in environments the overall environment (high temperature and high humidity), with a temperature T2°and the humidity H2%in order to cause migration with greater and greater speed, thus creating the image for evaluation after the acceleration test. Temperature and humidity during acceleration are arbitrary, provided that T1<T2and H1<H2. That is, it is important to increase the absolute content of water present in the environment, by setting higher temperatures and higher humidity. Generally speaking, it is believed that migration occurs when water-soluble organic solvent present in the printed product, absorbs moisture. Accordingly, it is important to take measures conducive to migration, by increasing the absolute content of water present in the environment in which the image for evaluation. In particular, the temperature T2°preferably is 30°s or greater, and the humidity H2% is preferably 80% or more, and therefore it is possible to increase the absolute content of water present in the environment in which the image for evaluation. In the present invention in view of the conditions in which the printing device and printed product are in the real environment, the temperature T2°and the humidity H2% sadunishvili 30° And 80% respectively. The result reproduces the condition under which migration in the printed product may occur when the user operates the printing device. It should be noted that the absolute content of water present in the environment having a temperature of 30°C and a humidity of 80%, approximately 24.3 g/m3.

The period of time during which the image for evaluation is maintained in the environment (high temperature and high humidity), temperature T2°and the humidity H2%ask chronologically follows the measurement of color tone of the image for evaluation. In particular, register the change of color tone of the image for evaluation of the initial standard state, and the point at which the rate of change decreases, in the preferred embodiment set corresponding to the period of time during which the image for evaluation in the initial standard state is maintained in the environment (high temperature and high humidity), temperature T2°and the humidity H2%. In a more preferred embodiment, the point at which there are almost no change in color tone, set the corresponding appropriate period of time during which the image for evaluation in the initial standard state you arrivalsa in the environment (high temperature and high humidity), with a temperature T2°and the humidity H2%. For example, the rate of change in color tone will be reduced in the environment having a temperature T2=30°and the humidity H2=80% within 96 o'clock, and the changing hues almost never be observed at the level of 168 hours. Therefore, to evaluate migration it is important that the image for evaluation in the initial standard state remained in the environment (high temperature and high humidity), temperature T2°and the humidity H2%during 96-hour or more. In a more preferred embodiment, the image for evaluation in the initial standard state is kept in the environment (high temperature and high humidity), temperature T2°and the humidity H2%for 168 hours or more, because changing the color tone in this case is almost a constant value, so that you can more accurately assess the difference in some property (in particular, moisture resistance) between the coloring materials. Due to the above reasons, the image for evaluation is preferable to stand in an environment having a temperature T2=30°and the humidity H2=80%for 168 hours.

(e) Measurement of the image for evaluation after the acceleration test

By measuring the t of the hue values (La *b*MCOs) obtained above image for evaluation after the acceleration test. This measurement is intended for the numerical determination of the colour tone of the image for evaluation after the acceleration test. In the present invention, the color tone of the image for evaluation after the acceleration test was measured by a spectrophotometer (Spectrolino (trade mark), manufactured by the company Gretag Macbeth) in the same way as is done in the above step (g).

(g) Calculating color contrast (ΔF)

Color contrast (Δ (E) was calculated on the basis of the following expression (1), based on the hue value (La*b*MCOs) image for evaluation in the initial standard state, measured in the above step (g), and hue (values La*b*MCOs) image for evaluation after the test acceleration and measurements mentioned image on the above-mentioned step (e).

Values La*b*image for evaluation in the initial standard state, located in the color space parameters La*b*MCOs are (L1, a1b1).

Values La*b*image for evaluation after testing on acceleration, located in the color space parameters La*b*MCOs are (L2, a2b2.

ΔE=√((L1-L2)2+(a1-a2)2+(b1-b2)2).(1)

Color contrast (Δ (E)computed on the basis of expression (1)represents the change in color tone. Therefore, the more color contrast (Δ (E)the greater the change in color tone. In other words, greater color contrast (Δ (E) means that there is a tendency for the migration, so that the degree of migration can numerically represent through color contrast (ΔE).

In the present invention a substantial following procedure. Evaluate properties (in particular, moisture resistance) of each coloring material through the above-described method of making judgments about the properties of the coloring material, calculates the color contrasts (ΔE)-ΔE1 ΔE2, ... in the corresponding images for evaluation established by the respective coloring materials, and the use of coloring material having a color contrast (ΔE), which is the maximum of the calculated digital contrasts of 9 or less.

Coloring material represented by the General formula (I)

Another variant implementation of the present invention differs in that krasivaya the material, having a contrast color (ΔE) 9 or less, the judgment of which pass by way of making judgments about the properties of the coloring material is a compound of General formula (I) or its salt.

General formula (I)

where M independently represents a hydrogen atom, alkaline metal, alkaline-earth metal or the cation or ammonium ion of an organic amine; the index n is independently an integer of 1 or 2.

Specific examples of the coloring material represented by the General formula (I)include compounds having structures represented in the following table 2. Of course, the present invention is not restricted by them. For convenience, the position of substitution of the sulfonic group are presented in table 2 by ring a or ring B, as shown in the following General formula (II). The position of substitution of the sulfonic group is defined by the following General formula (II).

General formula (II)

where M independently represents a hydrogen atom, alkaline metal, alkaline-earth metal or the cation or ammonium ion of an organic amine; the index n is independently an integer of 1 or 2.

Table 2
The position of Deputy
Ring AndRing B
Possible connection124
244
324,6
44,64

A preferred specific example of the coloring material represented by the General formula (I), includes the possible connection 1 below. Of course, the present invention is not limited to them.

Possible connection 1

Coloring material, which is not a coloring material represented by the General formula (I)

To further increase the density of the image, to obtain a more preferable color tone for other purposes in the present invention are preferably used coloring materials of two or more types. Specifically preferred as such coloring material is a coloring material represented by the General formula (I), and presented in the reference dyes direct yellow dye number 132 (C.I. Direct Yellow 132). Accordingly, another option domestic the present invention differs that C.I. Direct Yellow 132 is used as a coloring material in addition to the coloring material represented by the General formula (I).

The content of the coloring material

The content of the coloring material of the ink for inkjet printing of the present invention, preferably is in the range of 1.0 wt.%≤content≤4.0 wt.% with respect to the total mass of the ink. When the content of the coloring material is less than 1.0 wt.%, in some cases it becomes impossible to obtain the effects of the present invention, satisfactory in the context of staining properties and moisture resistance. When the content of the coloring material exceeds 4.0 wt.%, may decrease reliability in the context of stability of intermittent ejection and other properties of inkjet printing.

In addition, the content of the coloring material represented by the General formula (I)is preferably 10 wt.% or more relative to the total content of all coloring materials in the ink, in order to satisfactorily obtain effects of the present invention. When the aggregate of the coloring material is presented in reference dyes direct yellow dye number 132 (C.I. Direct Yellow 132), its content is preferably 10 wt.% or more p is relative to the total content of all coloring materials in the ink. In addition, the ratio of the content of the coloring material represented by the General formula (I), the content of C.I. Direct Yellow 132 (the content of the coloring material represented by the General formula (I):the content of C.I. Direct Yellow 132) is in the range of mass ratio from 0.5:5 to 2:5. Excessively small content of the coloring material represented by the General formula (I), makes it difficult to obtain a satisfactory effect of the present invention, whereas excessively higher content of coloring material represented by the General formula (I), tends to decrease the density of the image.

The testing method of coloring material

Possible connection 1, which is an example of a coloring material used in the present invention, can be tested by means of each of the following methods (1)to(3), each of which involves the use of liquid chromatography high resolution (GHWR (HPLC)):

(1) determination of the duration of the peak;

(2) determination of wavelength of maximum absorption at the peak according to (1);

(3) determine the mass/charge, M/Z (position., a negative.), at the peak according to (1).

Analysis conditions for liquid chromatography high resolution below. The solution of the ink diluted 1000 times with clean water, analyzed by liquid chromatogra the AI high resolution in the following conditions to measure the duration of the main peak and the wavelength of maximum absorption at the peak.

Column: symmetric model C18, 2.1 mm×150 mm

The column temperature: 40°

Flow rate: 0.2 ml/min

The photodiode array (PDA): 210 nm to 700 nm

The state of mobile phase and gradient: table 3

Table 3
0-5 min5-40 min40-45 min
And the Water85%85%>0%0%
In Methanol10%10%>95%95%
With an Aqueous solution of sodium acetate to a concentration of 0.2 mol/l5%5%5%

In addition, the following conditions analysis of the spectrum of masses. The mass spectrum of the resulting peak is measured in the following conditions, and for each positive and negative values change the most dramatically expressed by the ratio M/Z.

The method of ionization

Ionization method elektrorazpredelenie (IMAR)

The capillary voltage3.5 kV
Desalvatore gas300°
The temperature of the ion source120°
Detectorfor pological the data values: 40, 200-1500 of atomic mass units (Amu)/0.9 sec
for negative values: 40, 200-1500 u/0.9 sec

Table 4 shows the duration, wavelength of maximum absorption, M/Z (position.) and M/Z (negative.), for example, for each possible connection 1 and C.I. Direct Yellow 132, described above. When the coloring material has the values listed in table 4, this coloring material can be defined as being a coloring material which can be used in the present invention.

Table 4
Duration (min)The wavelength of maximum absorption (nm)M/Z
Position.A negative.
Possible connection 131-32390-410938-939468-469
.I.Direct

Yellow 132
33-34390-410640-641319-320

Water-soluble organic solvent

Water-soluble organic solvents used in the present invention must be such that the content of water-soluble of the organic solvent, in which the speed of X evaporation (wt.%) and the ratio Y of moisture absorption (wt.%) satisfy the relationship represented by the following equation (2), relative to the total content of water-soluble organic solvents in the ink, which is 50 wt.% or more.

It is believed that migration occurs when water-soluble organic solvent present in the printed product, absorbs moisture. Therefore, migration can be suppressed by introducing into the ink of this or that amount of water-soluble organic solvent that easily evaporates and has a low coefficient of moisture absorption. However, the ink containing only a water-soluble organic solvent that easily evaporates and has a low coefficient of moisture absorption, tend to cause problems in the context of adhesion on the end of the nozzle, the stability of the intermittent ejection, etc. In the present invention the ink with a suppressed migration of suppressed adhesion at the end of the nozzle and, for example, the excellent stability of the interrupted job can be obtained when the water-soluble organic solvent has the aforementioned structure.

Y<2,8X+10(2)

where: X represents the evaporation rate, Y is the coeff is consistent with a person's moisture absorption.

Speed X evaporation (wt.%) in the present invention is defined as follows: placed 5 g of water-soluble organic solvent in the cuvette having an outer diameter of 31 mm and a height of 15 mm; leave this cell to stand still in an environment having a temperature of 60°and a humidity of 10%for 192 hours; again measure the mass of the water-soluble organic solvent and determine the evaporation rate based on the reduced mass of the water-soluble organic solvent. The coefficient Y of moisture absorption (wt.%) determined in the following way: placed 5 g of water-soluble organic solvent in the cuvette having an outer diameter of 31 mm and a height of 15 mm; leave this cell to stand still in an environment having a temperature of 30°C and humidity of 80%for 192 hours; again measure the mass of the water-soluble organic solvent and determine the coefficient of moisture absorption on the basis of the increased mass of the water-soluble organic solvent.

In Fig. 1 is a diagram of the relationship between evaporation rate and coefficient of moisture absorption of each water-soluble organic solvent, calculated by means of the method described above. Denote Gly, DEG, PEG, 2P, 15PD, 16HD, 126HT, Urea and EtUrea are glycerin, diethylene glycol, polyethylene glycol, 2-PI is religon, 1,5-pentanediol, 1,6-hexanediol, 1,2,6-hexanetriol, urea and etilenmocevina respectively.

Got ink containing each of the above water-soluble organic solvents, and conducted the following experiment. Received simulating ink, which contained 3 wt.% presented in the reference dyes direct yellow dye number 132 (C.I. Direct Yellow 132), 20 wt.% each organic solvent and 0.5 wt.% Acetylenol EH (trade mark, produced by the company Kawaken Fine Chemicals Co., Ltd.) as the surfactant, and the rest was water. Apart from simulating ink received transparent ink, replacing the coloring material is water. The utilization rate of each of the modeling of the ink and the transparent ink was varied from 0 to 100%to create a printed product having formed thereon the image, which would be superimposed on each other simulating ink and transparent inks. As an inkjet printer used PIXUS 950I (trade mark, manufactured by company CANON Inc.), and as a carrier of printed information used photo paper of the highest quality (SP-101, produced by company CANON Inc.).

The obtained printed product held in the environment of normal temperature and normal humidity), having a temperature of 25°and RH is ity 60 %, within 48 hours, to cause evaporation of the water-soluble organic solvent and water from the carrier of printed information. The hue values (La*b*MCOs) after conditioning for 48 hours in an environment having a temperature of 25°C and a humidity of 60%, was measured by a spectrophotometer (trade mark Spectrorino, manufactured by the company Gretag Macbeth)to determine the values of La*b*. After that, the obtained printed product was kept in the environment (high temperature and high humidity), having a temperature of 30°C and humidity of 80%for 168 hours, to cause the migration of water-soluble organic solvent. The hue values (La*b*MCOs) after conditioning for 168 hours in an environment having a temperature of 30°C and humidity 80%, measured by the same spectrophotometer as described above to determine the values of La*b*after the migration of water-soluble organic solvent. Based on the results, determine the maximum color contrast (ΔE). We can say that the more color contrast (Δ (E)the greater the change in color tone in the environment with high temperature and high humidity and the less the resistance.

The above experimental the results and the relationship between the evaporation rate and coefficient of moisture absorption of each water-soluble organic solvent showed between the evaporation rate and coefficient of moisture absorption there is a correlation.

Migration is associated with deterioration of image quality due to change hue, for example, in the environment with high temperature and high humidity. Therefore, the less color contrast due to the environment, the better the migratory ability of water-soluble organic solvent. Water-soluble organic solvent having the proper migration ability, that is, good moisture resistance, characterized by the fact that this solvent easily evaporates and hard to absorb moisture. In other words, the water-soluble organic solvent having high migration ability, shows less color contrast (ΔE).

ΔF<5,5

ΔE>5,5

In General, the image having a contrast color (Δ (E)average of 5.5 or less, is preferred, because the change in color tone due to migration does not occur even in the environment with high temperature and high humidity. In contrast, the image having a contrast color (Δ (E)in excess of 5.5, shows a noticeable change in color tone due to migration in the environment with high temperature and high humidity, resulting in hudaida the quality of the prints. The expression (2)obtained by finding the correlation between the migration of each water-soluble organic solvent and a coefficient of moisture absorption of the solvent based on the above criteria. That is, in Fig. 1 shows that the water-soluble organic solvent to the right of the line Y=2,8X+10 has a contrast color (Δ (E)average of 5.5 or less.

Generally speaking, to improve the moisture resistance can be used water-soluble organic solvent having low solubility for the dye material (bad solvent). However, none of the coloring materials used in the present invention, has not demonstrated the existence of dependence between migration and solubility of the coloring material in the water-soluble organic solvent. That is not the solubility of the coloring material in the water-soluble organic solvent, and evaporation rate coefficient of water absorption of the water-soluble organic solvent in the ink dominate in improving the moisture resistance of coloring material used in the present invention.

Specific examples of water-soluble organic solvent satisfying the dependencies represented by the expression (2)include ethylene glycol, dietology the ol, 2-pyrrolidone, 1,5-pentanediol, 1,6-hexanediol, etilenmocevina, N-methyl-2-pyrrolidone, butylcarbamoyl and isopropyl alcohol. Of these water-soluble organic solvents, preferred are ethylene glycol, diethylene glycol, 2-pyrrolidone, 1,5-pentanediol, 1,6-hexanediol and etilenmocevina, and specifically preferred is etilenmocevina. In particular, etilenmocevina, diethylene glycol and 2-pyrrolidone are preferably used in combination in order to improve such properties of inkjet printing as reliability. You can use water-soluble organic solvent other than those described above, inasmuch as the solvent satisfies the dependencies represented by the expression (2).

Water-soluble organic solvent which does not satisfy dependencies represented by the expression (2), such as glycerol, urea or ethylene glycol, can be used in the ink of the present invention, to the extent that this water-soluble organic solvent has effect without prejudice to the objectives and effects of the present invention. However, the content of water-soluble organic solvent satisfying the dependencies represented by the expression (2), relative to the total content of water-soluble organic solvent is in the ink should be 50 wt.% or more, in order to satisfactorily obtain effects of the present invention. The content of water-soluble organic solvent satisfying the dependencies represented by the expression (2), relative to the total content of water-soluble organic solvents in the ink is preferably 65 wt.% or more, as the effects of the present invention are pronounced.

In the present invention, the content of water-soluble organic solvent satisfying the dependencies represented by the expression (2), relative to the total content of water-soluble organic solvents in the ink is 50% by weight of or more. When the content of water-soluble organic solvent satisfying the dependencies represented by the expression (2)is too low, you cannot obtain a significant effect of the present invention.

Meanwhile, the total content of all water-soluble organic solvents in the ink is preferably in the range of 10 wt.%<contents<50 wt.% or less relative to the total mass of the ink. When the total content of all water-soluble organic solvents in the ink is less than 10 wt.% or exceeds 50 wt.%, can worsen such properties inkjet printing as reliability.

Additives, etc

In the ink according to the present invention can be used substances in the form of solid particles, retains moisture, such as urea and a derivative of urea, if required.

In addition, in the ink according to the present invention it is possible to introduce additives such as a surfactant, a pH regulator, a corrosion inhibitor, an antiseptic, an antifungal agent, an antioxidant, an inhibitor of recovery, evaporation accelerator, helatoobrazovatel and water-soluble polymer.

The media printed information

For forming images by means of ink according to the present invention can use any media, printed information, since printing is carried out by applying ink to the media printed information.

The present invention is applicable to the medium of printed information, in which a coloring material such as dye or pigment is absorbed in the small particle, forming a porous structure in an ink absorbing layer, and the image is formed at least from this small particles with absorbed in her coloring material, and the present invention is suitable particularly for the case when the applied method of creating a jet of ink. Such media printed information for ink-jet printing is preferably a carrier so the so-called absorbing type, in which the ink is absorbed by the gap formed in the ink absorbing layer on the canvas.

Absorbing the ink absorbing layer of the type made in the form of a porous layer composed mainly of fine particles containing a binder and other additives, if required. Specific examples of fine particles include inorganic pigments such as silica, clay, talc, calcium carbonate, kaolin, aluminum oxide (for example, alumina or aluminum hydroxide, diatomaceous earth, titanium oxide, hydrotalcite and zinc oxide; and organic pigments such as urea-formalin polymer, a polymer based on ethylene and the polymer based on styrene. You can use one or more types of such particles. Examples of binders which are suitable for use include water-soluble polymer and latex. Examples of available binders include polyvinyl alcohol or denatured product; starch or its denatured product; gelatin or its denatured product; gum Arabic; cellulose derivatives such as carboxymethylcellulose, hydroxymethylcellulose and hypromellose; latexes based on copolymers of vinyl type, such as latex-based elastomeric copolymer of butadiene and styrene (SBR), latex-based elastomeric copolymer of butadiene and neither the Rila (NBR), latex-based copolymer of methyl methacrylate and butadiene, latex-based polymer with a functionally-modified group, and a copolymer of ethylene and vinyl acetate; polyvinylpyrrolidone, maleic anhydride or a copolymer; and a copolymer of acrylic ester. If necessary, you can use two or more types of such binders. In addition, you can use the additive, and examples of such additives that can be used if necessary, include a dispersant, a thickener, a pH regulator, lubricant, denaturation fluidity, surface-active substance, progestin, parting agent, a fluorescent Brightener, an ultraviolet light absorber and an antioxidant.

In particular, in the present invention preferably uses the medium of printed information, having formed therein an absorbent ink layer consisting mainly of fine particles having an average particle size of 1 μm or less. Specifically preferred examples of fine particles include fine silica particles and fine particles of aluminum oxide. Preferred fine silica particles are fine particles of silica, a typical representative of which is colloidal silica. Colloidal silica, which itself bought on the market, in particular, is such as described in JP 2803134 or JP 288147. Preferred fine particles of aluminum oxide are fine particles of aluminum hydroxide, and the like, aluminum Hydroxide represented by the following General formula, can be cited as one example of such fine particles of aluminum hydroxide.

AlO3-n(OH)2n·mH2O

where: n is an integer equal to 1, 2 or 3, and m is a value from 0 to 10, in the preferred embodiment, from 0 to 5, provided that m and n cannot be 0 at the same time. The number m may be an integer or a fraction, because the member mH2O also represents the aqueous phase, which can realize desorption and not involved in the formation of the crystal lattice with mH2O in many cases. In addition, the heated material of this type can cause reaches the value m is set to 0.

The aluminum hydroxide can be obtained through a well-known method, such as hydrolysis of aluminum alkoxide or sodium aluminate as described in US 4242271 or US 4202870, or the method comprising adding an aqueous solution of sodium sulfate, aluminum chloride, etc. in an aqueous solution of sodium aluminate, etc. for the implementation of neutralization, as described in JP-B57-44605.

The media printed information preferably has a basis to support the above ink absorbing layer. You can use the any basis without any specific limitations, because of its absorbent ink layer can be formed from the above-described porous fine particles, and this framework provides rigidity, so that this basis can be transported via the transport mechanism of the inkjet printer and the like, Specific examples of bases include base paper formed from raw material type-fibrous mass consisting mainly of fibers of natural cellulose; plastic base, consisting of such a material as complex polyester (e.g. polyethylene terephthalate), cellulose triacetate, polycarbonate, polyvinyl chloride, polypropylene or polyimide; a paper with a resin coated (for example, RC paper), having on one side the paper base layer polyolefin resin coating with the addition of white pigment, etc.

Ink kit

The ink according to the present invention preferably can also be used in combination with any other ink to ensure the ink set. In the sense in which the term "ink set" is used herein, it refers to a state in which the ink according to the present invention are used in combination with any other inks, such as cyan ink, bright red ink, yellow ink, or black ink. On the other inks that can be used in combination with black, the Lamy according to the present invention to provide ink set, there are no restrictions. The use of the term "ink set" in the present invention is also applicable to the case of joint use of multiple tanks with ink, and use case-capacity ink, which itself has several tanks with ink made as a unit with each other. The use of the term "ink set" also applies to the product, which is made as a single unit capacity of ink and printhead.

Method of inkjet printing

Ink corresponding to the present invention, it is convenient to use, in particular, in the method of inkjet printing, providing for the ejection of ink through the creation of a jet of ink. Examples of the method of inkjet printing include printing method involving the application of mechanical energy to the ink for ejection of ink, and a printing method, providing for the application of thermal energy to the ink to eject the ink. In particular, a printing method, involving the use of heat, is preferred for use in the present invention.

The ink cartridge

An example of the ink cartridge, suitable for printing by the ink of the present invention includes the ink cartridge, linking is a part for storing ink.

The printing unit

An example of the printing unit, suitable for printing by the ink of the present invention includes a printing unit that includes a portion for storing ink and the printhead. In particular, we can cite the example of a printing unit in which the print head applies heat energy corresponding to the signal printing, ink for formation of ink droplets through the mentioned energy.

Printer inkjet

An example of a printing device suitable for carrying out printing using the ink of the present invention includes a printing device in which thermal energy corresponding to the print signal applied to the ink in the chamber printhead having a portion for storing ink to form ink droplets through this energy.

Below will be described conventional structure corresponding to the example of the mechanical part of the device for inkjet printing. The housing of the printing device comprises a feeding sheets part transporting sheets part, Dobby parts, producing leaves part and the cleaning part and the outer covering part, designed to protect these parts and provide each of their arrangements, the capacity is ü to perform its intended role. Below will be described the basic concepts of each of these parts.

In Fig. 2 shows a General view of the printing device. In Fig. 3 and 4 shows images illustrating the internal mechanism of the housing of the printing device, respectively. In Fig. 3 is a perspective view from above and to the right, and Fig. 4 shows a cross-section of the printing device on the side view.

When submitting the paper in the printing device, in shameful part, consisting of a sheet feed roller M and separating roller M in the input sheet parts, including a tray M sheet feeder, put only a predetermined number of sheets of printed media information. Laid thus the printed media are separated in shameful parts, and is transported by only the top sheet of paper printed information. The media printed information sent in transporting sheets part, shall be sent by the holder M3000 roller and the folding guides focus M paper and sent to a pair of rollers consisting of a transporting roller M and roller M. A pair of rollers consisting of a transporting roller M and roller M, rotate, under the action leading to the movement of the front left motor E, and this rotation causes the transportation of media printed the information on buyhoodia roller M.

In Dobby parts, when printed on the media information of image formation, the print head N (Fig. 5) is located in the target position of image formation, and the ink are ejected onto the medium in accordance with a signal from an electric substrate E. Details of the composition of the printhead N will be described below. When the printhead N001 prints, in an alternating repeat the main scanning of the printing in which the print carriage M scans in the direction of column, and the sub-scanning in which the media is transported in the direction of a line conveying roller M, resulting in the storage medium is formed image.

And, finally, the media on which the formed image, it appears in the gap between the first releasing sheet roller M and spur 3120 in the position of the release sheet is transported and discharged to the tray M for release sheets.

In the cleaning part, when the pump M gets the opportunity to work in a state where the cover M is put into intimate contact with the hole for the ejection of ink printhead N to clean the printhead N before printing images and after it, there is a suction unnecessary ink and the like from the printhead N. Ink remaining is the cover M, imbibed with the cover open, as a result there was no adhesion of the remaining ink, no further detrimental effect.

The print head

The following cartridge N printhead. Cartridge N printhead includes a printhead N, tools for installation of tanks In ink and means for feeding ink from tanks In ink in the printhead, and is installed on the carriage M so that it can connect to it and disconnect from it.

In Fig. 5 shows how the capacity N ink is installed on the carriage N. Printing device forms the image by yellow, bright red, blue, black, pale red, pale blue and green ink, so that the capacity In ink independently prepared for seven colors. Ink in accordance with the present invention is used as at least one of the above-mentioned ink. In addition, as shown in the drawing, each tank with ink installed with the possibility of detaching the cartridge In head. Capacity N ink can be removed in a state where the cartridge N printhead mounted on the carriage M.

In Fig. 6 presents a General view of the spatial separation of the parts of the cartridge In head. Cartridge N head includes n is pout substrate N printed items, the second substrate N printed circuit elements, the first plate N, the second plate N, the substrate S with electrical wiring, the holder N tanks, element In forming flow channels, the filter N and rubber seal N.

Each of the first substrate N printed elements and the second substrate N printed items is a silicon substrate, having a lot of printing elements (nozzles)for ejection of ink formed on one surface by photolithography. Wiring made of aluminum and the like, for supplying power to each printing element formed by the method of forming a film, and numerous flow channels of the ink corresponding to the individual printing elements are also formed by photolithography. In addition, the ink supply channels intended for supplying ink in numerous ink flow channels formed in such a way that they open on the rear surface.

In Fig. 7 shows in enlarged scale a front view intended to explain the composition of each of the first substrate N printed elements and the second substrate N printed items. Position N-N denote the sequence of printing elements (which in the following text may be referred to as the sequences of nozzles), corresponding to different colors of ink. The first substrate N printed elements has a sequence of nozzles for three colors: sequence N nozzles, which serves a yellow ink; the sequence N nozzles, which are served in bright red ink; and the sequence N nozzles, which serves a blue ink. The second substrate N printed elements has a sequence of nozzles for four colors: sequence N nozzles, which serves pale blue ink; the sequence N nozzles, which served black ink; the sequence N nozzles, which serves orange ink, and the sequence 2600 nozzles, which serves pale red ink.

Each sequence of nozzles consists of 768 mi nozzles arranged at intervals of 1200 dpi (dots per inch; reference value) in the conveying direction of the carrier printed information, and each nozzle ejects 2 picolitre (PL) of ink. The orifice in each release hole nozzle set equal to about 100 μm2. The first substrate N printed elements and the second substrate In printed circuit elements are connected and bonded to the first plate N, having completed her holes N for supplying ink to the first substrate In printed elements and the second substrate In printed elements.

The second plate N, has holes, is also connected and bonded with the first wafer N. The second plate N supports the substrate N with electrical wiring so that the substrate S with electrical wiring, the first substrate N printed elements and the second substrate In printed circuit elements are electrically connected.

The substrate N with electrical wiring supply an electrical signal that causes each of the nozzles formed on the first substrate In printed elements and the second substrate N printed items, throw away the ink. The substrate N with wiring has a wiring connected to each of the first substrate N printed elements and the second substrate In printed elements, and the input terminal N to the external signal, which is located in the end portion of the wiring to receive an electrical signal from the body of the printing device. Input terminal N for external signal installed on the rear surface of the holder In containers and sealed with said party.

By the way, the item In forming flow channels, bonded, for example by ultrasonic welding with holder N tanks to support tanks N with ink. As a result, there is formed a flow channel N passing from the of Costa N ink to the first plate N.

Filter N is located in the end portion of the flow channel N ink, connected with containers N with ink, so that the filter N prevents dust from outside. On the part where a flow channel N communicates with the tanks In ink, a rubber seal N to prevent evaporation of ink from the mentioned parts.

In addition, as described above, the cartridge N head formed by joining by welding or a similar method of connection of the holder of the containers formed by the holder In tanks, element In forming flow channels, the filter N and rubber seal N, and part N printhead formed by the first substrate N printed circuit elements, the second substrate N printed circuit elements, the first plate N, the substrate S with electrical wiring and the second plate N.

In the above description, as an option for implementation of the printhead shown printhead corresponding to the Bubble Jet system, which performs printing by electrothermal Converter (printing element) for generating thermal energy, which causes the effect film boiling of ink depending on the electric signal.

Typical structure and principle of the method bubble jet characteristic to enter the mentioned system, preferably based on the basic principle described in U.S. patent No. 4723129 and 4740796. This principle applies to work through filing requirements and continuous feed. It is effective, in particular with respect to the flow demand, for the following reason. At least one excitation signal, which corresponds to the printing information and causes a sudden increase in temperature to a value higher than the temperature of nucleate boiling, served in the electrothermal Converter located in accordance with the trajectory of which is a sheet or liquid and which is retained by the liquid (ink), thereby causing the generation of thermal energy of the electrothermal transducer. After that, the surface of the printhead exposed to heat, causing film boiling. Consequently, it is possible the formation of a bubble in the liquid (ink) in one correspondence with the excitation signal. The growth and contraction of the air bubble causes the ejection of the liquid (ink) through the hole to eject the consequence of which is formed of at least one drop. The preferred excitation signal is a pulse signal, because it is able to immediately and adequately to cause the growth and contraction of a bubble of air, so that the eye is ivalsa possible ejection of the liquid (ink) with unequaled ability to respond.

An example of the second variant implementation of the printing device for inkjet printing, which uses mechanical energy includes a printhead for an inkjet printing supply needs, including soleobrazutaya substrate having multiple nozzles; creating a pressure element located opposite the nozzle and consisting of a piezoelectric material and conductive material; and an ink filling the space surrounding creating a pressure element, thus creating a pressure drop of the applied voltage, resulting in ejection of ink droplets from the nozzle.

Note also that the device for inkjet printing does not necessarily have to be the same as the above-described device, in which the head and capacity of the ink are separate elements, and may be one in which the head and capacity of the ink is made as a single unit so that they are inseparable. The capacity of the ink can be made separate from the head or inseparable component integral with the head installed on the carriage, or may be installed in the fixed part of the device for supplying ink to the printhead through such ink feed item, as a tube. When the capacity of the ink has a structure that is intended is for the preferred application of negative pressure to the printhead, in keeping ink part can be located absorbing means, or the capacity of the ink can have a flexible container with ink and a spring portion for the application of driving force to expand the internal volume of the container. In the printing device may be taken above the serial printing method, or it may be in the form of a device for line-by-line printing obtained by alignment of the printing elements in the range corresponding to the full width of the carrier printed information.

Examples

Below is a more detailed description of the invention by way of examples and comparative examples. However, in the beings of the present invention it is not limited to the following examples. Unless otherwise indicated, the term "part" of each component of the ink in the examples and comparative examples represents "mass part".

Obtaining a coloring material

Provided interface diazotized 4-nitro-4'-aminostilbene-2,2-disulfonate and 3-aminonaphthalene-1-sulfonic acids. The obtained product was placed in a triazole, and the nitro-group of triazole restored to an amino group by conventional known method of producing iminostilbenes. Iminostilbenes was dissolved in water and drop by drop added is the solution of sodium nitrite and hydrochloric acid to conduct diazotization. The resulting product drop by drop was added to the aqueous solution of the compounds represented by the following compound (1), and the whole was subjected to interaction with subsequent dialysis sodium chloride. The connection diazotisable aqueous solution of sodium nitrite and turned into triazole, adding an aqueous solution of 6-aminonaphthalene-2-sulfonic acids. Triazole were dialyzed with sodium chloride to obtain a coloring material represented by the following possible connection 1.

Connection (1)

Possible connection 1

Making judgments about the properties (moisture resistance) of coloring material

Judgment about the properties (moisture resistance) possible connection 1 obtained by the above-mentioned manner, and the respective coloring materials presented in the following table 5, carried by way of making judgments about the properties of the coloring material according to the present invention.

Getting simulating ink and the transparent ink

Simulating ink, each containing a coloring material, received in accordance with the following recipe.

Each coloring materialto 3.0 parts
Glycerin 9.0 parts
Urea9.0 parts
Acetylenol E1001.0
(produced by the company Kawaken Fine Chemicals Co., Ltd.)
WaterRest

Then got a transparent ink, replacing the coloring material in the above composition is water.

The water had a speed of X evaporation (wt.%), comprising 100 wt.%. Glycerol and urea are used as water-soluble organic solvents in the above composition, have a speed X evaporation (wt.%), the components of the 0 wt.% and 0.1 wt.% respectively. In addition, the glycerol has a coefficient Y of moisture absorption (wt.%), average of 66.9 wt.%, while urea is the coefficient of Y moisture absorption (wt.%), constituting 86,0 wt.%. Consequently, glycerol, and urea correspond to the water-soluble organic solvent having an evaporation rate less than the rate of evaporation of water, and the coefficient of moisture absorption, comprising 20 wt.% or more.

Creating images for evaluation and calculating color contrast

Provided the change in the utilization simulating ink from 0% to 100% in increments of 5%to create an image for evaluation, having graduated chart overlay. To create the image for evaluation, use the built ink-jet printer (trade mark PIXUS 950I, manufactured by company CANON Inc.) and the media printed information (SP-101, produced by company CANON Inc.). The obtained printed product was kept in an environment having a temperature of 25°C and humidity 60%, within 48 hours, and then measured the color tone of the plot graduated chart overlay by means of a spectrophotometer (Spectrorino (trademark), made by the company Gretag Macbeth). The printed product is additionally kept in an environment having a temperature of 30°C and humidity of 80%for 168 hours, and then measured the color tone of the plot graduated chart overlay as described above via the above spectrophotometer. Color contrast (Δ (E) in the image for evaluation was calculated on the basis of the following expression (1), on the basis of the color tone of the image for evaluation after keeping in an environment having a temperature of 25°C and humidity 60%, within 48 hours, and the color tone of the image for evaluation after keeping in an environment having a temperature of 30°C and humidity of 80%for 168 hours.

Located in the color space parameters La*b*MCOs values La*b*image for evaluation after keeping in an environment having a temperature of 25°C and a humidity of 60% (i.e. in initial standard state)during the 48 hours are (L 1, a1b1).

Located in the color space parameters La*b*MCOs values La*b*image for evaluation after keeping in an environment having a temperature of 30°C and a humidity of 80% (i.e., after testing for acceleration), within 168 hours are (L2, a2b2).

ΔE=√((L1-L2)2+(a1-a2)2+(b1-b2)2).(1)

Calculated maximum contrast color (ΔE) of the color contrasts in the respective images to estimate, calculated on the basis of expression (1). The results are shown in table 5.

Table 5
Coloring materialEmax
Possible connection 17,5
S Food Yellow 310,4

Getting ink

Ink a to G according to the examples and the ink N ' according To the comparative examples were obtained through a possible connection 1 obtained as described above, and represented in the reference dye (C.I.) food coloring yellow (Food Yellow) under number 3 (C.I. Food Yellow 3) in accordance with the formulation of the decree is Noah in table 6.

Table 6
Ink
ABCDEFGHIJK
Possible connection 13,04,53,03,03,03,03,03,03,03,0
C.I.Food Yellow 33,0
Ethylene glycol4,011,2
Diethylene glycol9,29,29,25,25,09,29,29,210,0
2-pyrrolidone5,05,05,02, 5,09,46,05,05,0
Etilenmocevina55225,0
1,5-pentanediol5,0
N-methyl-2-pyrrolidone4,0
Butylcarbamoyl2,0
Isopropyl alcohol3,0
Urea9,05,010,0
Glycerin9,07,09,08,08,010,010,08,05,09,05,5
Polyethylene (*1)5,05,0
Acetylenol E100 (*2)0,90,90,90,90,90,90,90,90,90,9
Surfynol 104PG50 (*3)0,1
Deionized water67,968,467,969,969,976,167,5of 58.977,967,960,6
(*1) Forefront of the popular weight 200

(*2) Adduct of ethylene oxide and acetylglycine (surfactant) (produced by the company Kawaken Fine Chemicals Co., Ltd.)

(*3) Surfactant, produced by firm Nissin Chemical Industry Co., Ltd.

Evaluation of print

Got a transparent ink And by replacing the water of each of the coloring materials in the formulation obtained as described above ink a to G according to the examples and ink N ' according To the comparative examples. For evaluation used an inkjet printer (trade mark PIXUS 950I, manufactured by company CANON Inc.)

(1) moisture Resistance ink

Ensured the changing range of utilization of each of the inks according to examples and comparative examples, from 0% to 100% in increments of 5%to create an image for evaluation, having graduated chart overlay. The combination of the ink and the transparent ink was a combination of ink and the transparent ink And the combination of ink and the transparent ink, etc. as a carrier of printed information used glossy media print information (SP-101, produced by company CANON Inc.). The obtained printed product was kept in an environment having a temperature of 25°C and humidity 60%, within 48 hours, and then measured the color tone of the plot graduated chart overlay by means of a spectrophotometer (Spectrorino brand), manufactured by the company Gretag Macbeth). The printed product is additionally kept in an environment having a temperature of 30°C and humidity of 80%for 168 hours, and then measured the color tone of the plot graduated chart overlay as described above via the above spectrophotometer. Color contrast (Δ (E) in each image for evaluation was calculated on the basis of the following expression (1), on the basis of the color tone of the image for evaluation after keeping in an environment having a temperature of 25°C and humidity 60%, within 48 hours, and the color tone of the image for evaluation after keeping in an environment having a temperature of 30°C and humidity of 80%for 168 hours.

Located in the color space parameters La*b*MCOs values La*b*image for evaluation after keeping in an environment having a temperature of 25°C and a humidity of 60% (i.e. in initial standard state), in the next 48 hours are (L1, a1b1).

Located in the color space parameters La*b*MCOs values La*b*image for evaluation after keeping in an environment having a temperature of 30°C and a humidity of 80% (i.e., after testing for acceleration), within 168 hours are (L2, a b2).

ΔE=√((L1-L2)2+(a1-a2)2+(b1-b2)2).(1)

Calculated maximum contrast color (ΔE) of the color contrasts in the respective images to estimate, calculated on the basis of expression (1), and were evaluated every ink moisture on the basis of the following criteria. The results are shown in table 7.

And4,0 ≥ ΔE
In5,5 ≥ ΔE > 4,0
7,0 ≥ ΔE > 5,5
DΔE > 7,0

(2) the stability of the intermittent ejection

Inkjet printer that has an ink cartridge having a supply of each of the inks according to examples and comparative examples was kept in an environment having a temperature of 15°C and a humidity of 10%within one day. After that performed printing on high-quality specialized paper (trademark HR-101, produced by firm CANNON Inc.) in an environment having a temperature of 15°C and a humidity of 10%, by means of ink consumed with a utilization rate of 50%. Then again spent the print as well as decree what about the above, after a certain time interval after the above printing, and measured the time interval after which at an early stage of printing, there was a noticeable lack of slippage. The stability of the intermittent ejection was evaluated by the measured time based on the following criteria. The results are shown in table 7.

APause for 5 seconds or more
BPause for 3 seconds or more, but less than 5 seconds
CPause for at least 3 seconds

Table 7
ExampleComparative example
12345671234
Yellow inkABCDEFGHIJK
X[wt.%] (*4)28,226,228,226,226,220,0286 32,219,028,230,5
Y[wt.%] (*5)19,219,219,213,213,210,018,615,29,019,215,0
Z[%] (*6)68,173,368,150,450,450,065,0to 47.247,468,149,2
HumidityAAABBBACCDC
The stability of the intermittent ejectionABBABBBAAAB
(*4) the Total content of water-soluble organic solvent (wt.%)

(*5) Content (wt.%) water-soluble organic solvent satisfying the expression (2)

(*6) Ratio (%) content of water-soluble organic solvent satisfying the expression (2), to the total content of water-soluble organic solvents

As what you can see from the above table 7, when comparing examples 1 to 7 with comparative examples 1, 2 and 4 reveals that excellent moisture resistance is obtained in the case when using the possible connection 1, having an average of 9 or less color contrast (Δ (E)judgment about which pass by way of making judgments about the properties of a coloring material, and the content of water-soluble organic solvent satisfying the dependencies represented by the expression (2), relative to the total content of water-soluble organic solvents in the ink is 50% by weight of or more. When comparing examples 1, 2, 3, and 7 with examples 4, 5 and 6, it appears that excellent moisture resistance is obtained also in the case when the content of water-soluble organic solvent satisfying the dependencies represented by the expression (2), relative to the total content of water-soluble organic solvents in the ink is 65 wt.% or more. When comparing example 1 with example 3, it appears that proper moisture resistance and excellent stability of intermittent ejection obtained in the case when the water-soluble organic solvent satisfying the dependencies represented by the expression (2), is introduced etilenmocevina. When comparing example 4 with example 5, it appears that the good is the good moisture resistance and excellent stability of intermittent ejection obtained at when the water-soluble organic solvent satisfying the dependencies represented by the expression (2), are diethylene glycol, 2-pyrrolidone and etilenmocevina.

Judgment on the moisture resistance of coloring material

The judgment of the resistance of each of the different coloring materials brought out by the following method. Next will be described a specific example of the method of making judgments about water resistance.

Getting simulating ink and the transparent ink

For concreteness, we note that modeling the ink received in accordance with the following composition by using glycerol and urea as water-soluble organic solvents, tools Acetylenol E100 (manufactured by Kawaken Fine Chemicals Co., Ltd.) as surfactants and presented in the reference dyes direct yellow dye number 132 (C.I. Direct Yellow 132) as a coloring material.

Glycerin10 wt.%
Urea10 wt.%
Acetylenol E100 (produced by the company Kawaken Fine Chemicals Co., Ltd.)1.0 wt.%
C.I. Direct Yellow 1323.0 wt.%
WaterRest

Then apart from simulating ink received transparent ink, replacing part of the coloring material simulating the ink is water.

The water had an evaporation rate of 100%. Meanwhile, glycerin and urea, used as a water-soluble organic solvents in the above composition, have a speed X evaporation (wt.%), the components of the 0 wt.% and 0.1 wt.% respectively. In addition, the glycerol has a coefficient Y of moisture absorption (wt.%), average of 66.9 wt.%, while urea is the coefficient of Y moisture absorption (wt.%), constituting 86,0 wt.%. Consequently, glycerol, and urea correspond to the water-soluble organic solvent having a speed X evaporation (wt.%), less than the rate of evaporation of water, and the ratio Y of moisture absorption (wt.%), comprising 20 wt.% or more.

Print by simulating ink and the transparent ink

To create the image for evaluation, used jet printer PIXUS 950I (trade mark, manufactured by company CANON Inc.) and the media printed information (trade mark SP-101, produced by company CANON Inc.). The image that corresponded to the total utilization of ink constituting 80%, and which were superimposed on each of the above-mentioned modeling the ink use efficiency when printing was 10%, and you shall upomyanutye transparent ink, the utilization rate which when printing was 70%, printed in an environment having a temperature of 25°C and humidity 60%.

Keeping the printed product

The printed product was kept in an environment having a temperature of 25°C and humidity 60%, within 48 hours. After that, the measured Lab values MCOs for the image by means of a spectrophotometer (trade mark Spectrolino, manufactured by the company Gretag Macbeth) and determine the values of the Lab=(L1, a1b1) in the color space parameters La*b*The ice in the initial standard state. At this point, L1=3.6V, a1=-7,5, and b1=36,8.

After that, the obtained printed product was kept in an environment having a temperature of 30°C and humidity of 80%for 168 hours, and then measured the Lab values of the ice for the image by means of a spectrophotometer (trade mark Spectrolino, manufactured by the company Gretag Macbeth) and determine the values of the Lab=(L2, a2b2) in the color space parameters La*b*The ice in the initial standard state. At this point, L1=93,5, a1=-9,6, and b1=45,0. The results confirmed the following expression:

ΔE=√((L1-L2)2+(a1-a2)2+(b1-b2)2)=8,5.

Color contrast (Δ (E) between any other coloring material is m before keeping in the environment, having a temperature of 30°C and humidity 80%, and the coloring material after keeping in the same environment is shown in table 8.

Table 8
Coloring materialThe maximum value of ΔE, obtained by means of the method of making judgments about water resistance
Yellow coloring

material Y1
7,5
Direct Yellow 1328,5
Direct Yellow 1428,0
Direct Yellow 865,0
Direct Yellow 1734,8
Acid Yellow 23the 9.7

Getting ink

Ink L-U according to the examples and ink V-Y according to comparative examples were obtained through a possible connection 1 obtained as described above, and the respective coloring materials in accordance with the formulation shown in table 9.

td align="center"> W 65,1
Table 9
Ink
LMNOPQRSTUVXY
Possible connection 10,51,00,50,50,50,50,50,50,53,00,50,50,50,5
C.I.Direct

Yellow 132
2,53,02,52,52,52,52,52,52,52,5
C.I.Direct

Yellow 142
3,0
C.I.Direct

Yellow 86
3,0
C.I.Direct

Yellow 173
0,5
C.I.Acid

Yellow 23
2,5
Ethylene glycol4,211,23,010,0
Dietilen-glycol9,29,29,25,05,09,29,29,29,29,2
2-pyrrolidone5,05,05,02,05,09,45,05,05,05,05,05,0
Ethylene-urea5,05,03,0 3,05,05,05,05,0
1,5-pentanediol5,0
N-methyl-2-pyrrolidone4,0
Butylcarbamoyl2,0
Isopropyl alcohol3,0
Urea5,010,05,010,0
Glycerin9,07,09,0to 12.0to 12.010,010,09,09,09,013,05,09,05,5
Polyethylene glycol (*1)
Syrfynol

104PG50 (*3)
0,1
Deionized water67,968,967,969,969,976,167,567,467,462,477,967,965,6
(*1) Molecular weight 200

(*2) Adduct of ethylene oxide and acetylglycine (surfactant) (produced by the company Kawaken Fine Chemicals Co., Ltd.)

(*3) Surfactant, produced by firm Nissin Chemical Industry Co., Ltd.

Evaluation of print

Got a transparent ink L-Y by replacing the water of each of the coloring materials in the formulation obtained as described above ink L-U according to the examples and ink V-Y according to the comparative examples. For evaluation used an inkjet printer (trade mark PIXUS 950I, manufactured by company CANON Inc.)

(1) moisture Resistance ink

Ensured the changing range of utilization of each of the inks according to examples and comparative examples, from 0% to 100% in increments of 5%to create an image for evaluation, having graduated chart overlay. The combination of the ink and the transparent ink was a combination of L ink and the transparent ink L, a combination of ink M and transparent ink M, etc. as a carrier of printed information used glossy media print information (SP-101, produced by company CANON Inc.). The obtained printed product was kept in an environment having a temperature of 25°C and humidity 60%, within 48 hours, and the ohms were measured color tone of the plot graduated chart overlay by means of a spectrophotometer (trade mark Spectrorino, manufactured by the company Gretag Macbeth). The printed product is additionally kept in an environment having a temperature of 30°C and humidity of 80%for 168 hours, and then measured the color tone of the plot graduated chart overlay as described above via the above spectrophotometer. Color contrast (Δ (E) in each image for evaluation was calculated on the basis of the following expression (1), on the basis of the color tone of the image for evaluation after keeping in an environment having a temperature of 25°C and humidity 60%, within 48 hours, and the color tone of the image for evaluation after keeping in an environment having a temperature of 30°C and humidity of 80%for 168 hours.

Located in the color space parameters La*b*MCOs values La*b*image for evaluation after keeping in an environment having a temperature of 25°C and a humidity of 60% (i.e. in initial standard state), in the next 48 hours are (L1, a1b1).

Located in the color space parameters La*b*MCOs values La*b*image for evaluation after keeping in an environment having a temperature of 30°C and a humidity of 80% (i.e., after testing for acceleration), within 168 hours are (L2, a b2).

ΔE=√((L1-L2)2+(a1-a2)2+(b1-b2)2).(1)

Calculated maximum contrast color (ΔE) of the color contrasts in the respective images to estimate, calculated on the basis of expression (1), and were evaluated every ink moisture on the basis of the following criteria. The results are shown in table 9.

And4,0 ≥ ΔE
In5,5 ≥ ΔE > 4,0
7,0 ≥ ΔE > 5,5
DΔE > 7,0

(2) the stability of the intermittent ejection

Inkjet printer that has an ink cartridge having a supply of each of the inks according to examples and comparative examples was kept in an environment having a temperature of 15°C and a humidity of 10%within one day. After that performed printing on high-quality specialized paper (trademark HR-101, produced by firm CANNON Inc.) in an environment having a temperature of 15°C and a humidity of 10%, by means of ink consumed with a utilization rate of 50%. Then again spent the print as well as the criminal code is shown above, after a certain time interval after the above printing, and measured the time interval after which at an early stage of printing, there was a noticeable lack of slippage. The stability of the intermittent ejection was evaluated by the measured time based on the following criteria. The results are shown in table 9.

AndPause for 5 seconds or more
InPause for 3 seconds or more, but less than 5 seconds
Pause for at least 3 seconds

(3) the density of the image

Each of the inks according to examples and comparative examples were used to conduct printing with a utilization rate of 100%, thus obtaining a printed product. As a carrier of printed information used glossy media print media (trademark of SP-101, produced by firm CANNON Inc.). The obtained printed product was dried for 24 hours. The optical density of the printed product was measured by a spectrophotometer (trade mark Spectrolino, manufactured by the company Gretag Macbeth) and estimated the density of the image on the basis of the following criteria.

AndThe optical density Bo is the more 1,85
InThe optical density is 1.75 or more to 1.85 or less
The optical density is less than 1,75

(4) the Color tone

Each of the inks according to examples and comparative examples were used to conduct printing with a utilization rate of 100%, thus obtaining a printed product. As a carrier of printed information used glossy media print media (trademark of SP-101, produced by firm CANNON Inc.). The obtained printed product was dried for 24 hours. Saturation (S) color and angle (h) of the color of the printed area of the product was measured by a spectrophotometer (trade mark Spectrolino, manufactured by the company Gretag Macbeth). Saturation (S) of color was calculated on the basis of the following expression (3)based on the values of a*b*located in the color space parameters La*b*MCOs. Color saturation and hue angle were evaluated based on the following criteria. The results are shown in table 10.

Saturation (color

AndC is 105 or more
InWith ranges from 95 or more up to 105 or less

Angle (h) shade

Andh is 85 or more 90 or less
Inh ranges from 83 or more to 85 or less or equals 90 or more up to 92 or less
h less than 83 or more 92.

18,6
Table 10
ExampleComparative example
8910111213141516175678
InkLMNOPQRSTUVWXY
X[wt.%] (*4)28,226,228,226,226,220,028,628,228,233,231,019,028,230,5
Y[wt.%] (*5)19,219,219,214,214,210,019,219,219,28,09,019,215,0
Z[%] (*6)68,173,368,154,254,250,065,068,168,157,825,847,468,149,2
HumidityAAABBBABABDCCC
The stability of the intermittent ejectionABBABBBBBBAABB
The density of the imageAAAAAAABABAACA
Saturation (colorAAAAAAAAA BAAAAnd
Angle (h) shadeAAAAAAABCBAABA
(*4) the Total content of water-soluble organic solvent (wt.%)

(*5) Content (wt.%) water-soluble organic solvent satisfying the expression (2)

(*6) Ratio (%) content of water-soluble organic solvent satisfying the expression (2), to the total content of water-soluble organic solvents

As you can see from the above table 10 comparison of examples 8-17 with comparative examples 5, 6 and 8, excellent moisture resistance is obtained when the content of water-soluble organic solvent satisfying the dependencies represented by the expression (2), relative to the total content of water-soluble organic solvents in the ink is 50% by weight of or more. When comparing examples 8, 9, 10 and 14 with examples 11, 12 and 13, causing the same coloring material, it turns out that excellent moisture resistance is obtained also in the case, cordstanzania water-soluble organic solvent, satisfying the dependencies represented by the expression (2), relative to the total content of water-soluble organic solvents in the ink is 65 wt.% or more. When comparing examples 9-14 examples 15-17 in image density and color tone, it turns out that excellent moisture resistance, excellent stability of intermittent ejection, excellent image density and excellent color tone are obtained in the case when the water-soluble organic solvent is used, the combination of a possible connection 1 and presented in reference dyes direct yellow dye number 132 (C.I. Direct Yellow 132). The comparison of example 8 with example 10, it turns out that the proper moisture resistance and excellent stability of intermittent ejection obtained in the case when the water-soluble organic solvent satisfying the dependencies represented by the expression (2), is introduced etilenmocevina. The comparison of example 11 with example 12, it appears that proper moisture resistance and excellent stability of intermittent ejection obtained in the case when the water-soluble organic solvent satisfying the dependencies represented by the expression (2), enter any of these compounds, such as diethyl who glycol, 2-pyrrolidone and etilenmocevina.

In this proposal put forward claims priority from Japanese patent applications No. 2004-196446, filed July 2, 2004, 2004-196449, filed July 2, 2004, and 2005-193806, filed July 1, 2005, and all of them are mentioned here for reference.

1. Ink for inkjet printing containing at least dye and water-soluble organic solvent, wherein the dye contains a compound represented by the following General formula (I)

or its salt,

where M independently represents a hydrogen atom, alkaline metal, alkaline earth metal or cation or ammonium ion of an organic amine; the index n is independently an integer of 1 or 2,

when this water-soluble organic solvent contains at least one water-soluble organic solvent selected from the group consisting of ethylene glycol, diethylene glycol, 2-pyrrolidone, 1,5-pentanediol, 1,6-hexandiol and ethylenoxide, and the total content of at least one water-soluble organic solvent is 50% by weight of or more with respect to content of all water-soluble organic solvents in the ink.

2. Ink for inkjet printing according to claim 1, characterized in that it further contains presented the reference dyes direct yellow dye number 132 as the coloring matter.

3. Ink for inkjet printing according to claim 1, characterized in that the content of water-soluble organic solvent is 65 wt.% or more with respect to content of all water-soluble organic solvents in the ink.

4. Ink for inkjet printing according to claim 1, characterized in that the water-soluble organic solvent contains diethylene glycol, 2-pyrrolidone or etilenmocevina.

5. Method of ink jet printing containing the ejection operation of the ink jet method, wherein the ink contains the ink for inkjet printing according to claim 1.

6. Cartridge for ink containing unit for storing ink, wherein the ink contains the ink for inkjet printing according to claim 1.

7. The printing unit comprising a unit for storing the ink and the printhead for ejection of ink, wherein the ink contains the ink for inkjet printing according to claim 1.

8. Device for inkjet printing containing block for storing ink and the printhead for ejection of ink, wherein the ink contains the ink for inkjet printing according to claim 1.



 

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FIELD: polygraphy.

SUBSTANCE: invention relates to water-based printing dye used in the set of reaction liquid with water-based printing dye for image formation. The water-based printing dye is proposed making a part of the system using a reaction liquid including, at least, a polyvalent metal and water-based printing dye comprising, at least a pigment dispersion wherein the pigment is dispersed in anionic polymer disperser. Here note that the water-based printing dye meets the specified requirements.

EFFECT: production of a stable jet printing irrespective of the printing conditions, formation of uniform image with a high resistance to deterioration, clear image even in two-side printing, high-quality image sharpness.

18 cl, 1 tbl, 10 ex

FIELD: polygraphy.

SUBSTANCE: invention relates to water-based printing dye used in the set of reaction liquid with water-based printing dye for image formation. The water-based printing dye is proposed making a part of the system using a reaction liquid including, at least, a polyvalent metal and water-based printing dye comprising, at least a pigment dispersion wherein the pigment is dispersed in anionic polymer disperser. Here note that the water-based printing dye meets the specified requirements.

EFFECT: production of a stable jet printing irrespective of the printing conditions, formation of uniform image with a high resistance to deterioration, clear image even in two-side printing, high-quality image sharpness.

18 cl, 1 tbl, 10 ex

FIELD: chemistry.

SUBSTANCE: invention pertains to ink for an ink-jet printer. Description is given of the ink for an ink-jet printer, containing 62-77 mass % water, 10-18 mass % dye, X (%), water soluble organic substance 1 and 2.0-15 mass %, Y (%), water soluble organic substance 2. Viscosity of the ink ranges from 1 to 5 cP at 25°C, content X (%) of substance 1 and content Y (%) of substance 2 satisfies the relationship in formula (I) and formula (II): (I) 0.15 ≤ Y/X ≤ 0.9; (II) 15 mass % ≤ X+ Y ≤ 32 mass %. Compound 1 is a water-retaining water soluble organic compound, with difference between the water-retention capacity in a surrounding medium at 23°C and humidity of 45% and water-retention capacity in a surrounding medium at 30°C and 80% humidity at 36% or less. Compound 2 is a water soluble organic compound, different from the dye and from the water soluble organic compound 1.

EFFECT: proposed ink sufficiently suppresses the effect of twisting printing material and provides for stable injection.

26 cl, 6 dwg, 6 tbl, 21 ex

FIELD: polymer coatings.

SUBSTANCE: invention relates to using powder composition to coat jet printing materials utilized as visual information carriers. Powder composition contains (i) one or several powder silane-containing polyvinyl alcohols based on copolymers of fully or partially hydrolyzed esters having degree of hydrolysis from 75 to 100 mol % and (ii) one or several water re-dispersible polymer powders based on homopolymers or copolymers of one or several monomers selected from group including nonbranched or branched C1-C15-alkylcarboxylic acid vinyl esters, (meth)acrylic acid esters with C1-C15-alcohols, vinylaromatic compounds, olefins, dienes, and vinyl halides.

EFFECT: enabled manufacture of wear-resistant coatings to coat both paper and polymeric substrates, avoided undesired increase in viscosity during composition preparation procedure, and enabled more flexible variation in contents of solids in chalking mass.

10 cl, 15 ex

FIELD: printing materials.

SUBSTANCE: invention relates to printing ink containing first colorant and second colorant, at least one of the colorants including fluorescent color. First and second colorants are located separately on a printing medium while printing ink ensure obtaining printed image with improved fluorescent properties. Invention further relates to printed image and a method of forming printed image utilizing such ink. Invention solves the problem of reducing fluorescence and improving fluorescent properties by way of separating fluorescence region and colored region as well as by way of formation of area on printing medium wherein points of coagulated first colorant are spread in the region of fixed second colorant so that absorption of fluorescent emission energy from fluorescent colorant is considerably reduced by coexisting colorant involving corresponding technologies. The latter are based on a novel technical conception residing in improvement of characteristics of fluorescent emission of a second colorant used in printing ink including a first fluorescent colorant, which, being excited at specified excitation wavelength, fluoresces within specified wavelength range.

EFFECT: improved fluorescent properties of printed image.

15 cl, 31 dwg, 4 tbl, 33 ex

FIELD: technological processes; printing industry.

SUBSTANCE: method of mask templates generation, used for generation of image data for printing of multiple types of points by means of scanning, is characterised by the fact that location of printing-permitting pixels is determined in every of multiple mask templates that correspond to multiple types of points, for that purpose location of printing-permitting points is determined, so that low frequency components, which are determined by location of printing-permitting pixels in every of multiple mask templates, are reduced in multiple mask templates. Method of data processing contains stage, at which image data is generated, which provides printing of multiple point types by means of corresponding multiple scanning, using mask template. Device of data processing, which contains facility for generation of image data, provides printing of multiple point types by means of corresponding multiple scanning, using mask template. For generation of image data for printing of multiple point types by means of corresponding scanning multiple mask templates are used, at that when at least two of multiple mask templates are superimposed one above each other, template of printing-permitting pixels from imposed mask templates has less low frequency components compared to the template produced by imposition of at least two mask templates, at which they substitute each other. Invention is produced as a result of deposition caused by grains, which may be formed during separate printing, and also elimination of problems caused by formation of such grains.

EFFECT: higher image quality.

49 cl, 93 dwg

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