Set of printing ink, printed item, method of printing and application of dye

FIELD: printing technique.

SUBSTANCE: set and method of printing can be used for printing light-absorbing signs of protection of printed items. Set of printing ink for printing of light-absorbing signs has at least two dyes. Any dye has at least one dyeing matter, pigment of dye which absorbs visible light. Set of printing inks has first and second groups of dyes. Dyes from first group additionally have mark with preset spectral absorption characteristic, preferably with characteristic relating to absorption. Mark has absorption maximum within wavelength range of 700-900 nm, preferably, 780 nm, and the mark practically doesn't absorb light within visible spectrum of absorption. Dyes of second group has dyeing matter, dye or pigment, which absorbs light within visible light spectrum and they have the same maximum of absorption within IR-red spectrum at wavelength around 700 nm as spectral characteristic within IR-red range of mark, Method of printing signs, printed item and set of dyes, including four-color set of printing inks and IR-mark, are described.

EFFECT: reliability of identification of authenticity of item independently on color of signs.

15 cl, 5 dwg, 2 app

 

The invention relates to a set of printing inks for printing signs, printing product, to a method of printing called marks on the product and to the use of dye or pigment in a paint named set of printing inks for printing the named characters.

Printing ink absorbing spectral selective invisible electromagnetic radiation, in particular printing inks that absorb radiation in the near infrared region (NIR), widely known and used in the art. Printing inks that absorb in the infrared region (IR), are among the other for printing machine-readable labels such as text, numbers or bar code, and also for printing anti-counterfeiting labels, which help to establish the authenticity of the products that bear such paints. In particular, expanding the scope of applications related to trademark protection, makes a request for hidden labels that can be printed using traditional offset printing or printing on the packages.

In EP 340898 B1 discloses a method of authentication in which the product is applied first identification mark containing colourless, strongly absorbing in the near infrared region, and then on top of this sign is printed the second identification mark containing the dye, which is not absorbed is anything in the near infrared region. This method requires the printing of two different colors one on another.

In EP 553614 disclosed the use of a fluid containing as printing inks specific phthalocyanines. These phthalocyanines are used as components that absorb in the infrared region and having a maximum spectral absorption in the region of wavelengths from 700 to 1200 nm. Phthalocyanines generally known in the art as coloring agents that absorb in the infrared region.

In WO 90/1604 disclosed system authentication products for the authentication of products with IR label. Named IR-label pick up so that she had the characteristic absorption spectrum of light in the selected wavelength. As an example, the IR labels that absorb in the region of the selected wavelengths and is characterized by a narrow absorption spectrum, the compounds of rare earth elements.

Materials that absorb in the IR (and UV) region and is transparent in the visible region, also known from GB 2168372. In EP 484018 disclosed phthalocyanine compounds that are of interest as infrared absorbers having a maximum spectral absorption in the region of wavelengths from 680 to 900 nm. Such compounds are used, among other applications, to cover drives for storage of optical data, as well as in the sphere of security print, for example as ingredients in paints for printing currency or checks. EP 408191 relates to substituted phthalocyanines, absorbing near infrared radiation in wavelengths from 700 to 1500 nm, more specifically from 725 to 1100 nm. In EP 134518 disclosed naphthalocyanine compounds that are excellent absorbers in the near infrared spectral region from 750 to 900 nm and which can be used as pigments or dyes in the coating compositions. EP 282182 relates to substituted the phthalocyanines having an absorption band in the near infrared region from 700 to 1500 nm and which is used for printing labels for systems optical character recognition (OCR). In the US 4606859 disclosed other phthalocyanine compounds that absorb in the near infrared region, which can be used for the above purposes.

In EP 552047 disclosed printed materials, marked absorption in the infrared region. These printed materials include a substrate having absorption in the infrared region of the label of a specific configuration. This label includes characters that have strong absorption in the infrared region, and is transparent in the infrared region of the colored concealing layer, which covers (operative) signs that absorb in the infrared region.

The DE 3826734 disclosed a machine-readable paint, absorbing light in the spectral region of wavelengths from 700 to 1000 nm. The IR-absorbing pigment added to the ink containing other pigments that absorb visible light. In EP 155780 disclosed specific poly(substituted)phthalocyanine that absorbs light in the near infrared region. DT 4022822 refers to printed product containing the first information, visible to the naked eye, and the second invisible information. First, the visible, the information made use of dyes which transmit the light in the invisible spectrum. The second information includes dyes that absorb in the invisible spectrum.

All of the above infrared absorbing ink containing an infrared-absorbing dyes or pigments) must be applied in a separate printing operation (additional pass)conducted solely in order to print the infrared absorbing marking on this product. Named IR-absorbing dye, in addition, often have their own pigment in the visible spectrum (400 to 700 nm) in addition to specific characteristics of infrared absorption, which complicates their integration into the art four-color design. For this reason, over the markings performed using such inks typically print IR-transparent intense color paint, which closes sobstvennyje IR-absorbing labels.

From the point of view of design and printing devices, it would be highly desirable to have a full four-set printing inks, with the same features infrared absorption, which could be used in conjunction with traditional four-set printing inks, which do not possess such features infrared absorption.

To this end an attempt was made to create a printing ink containing dyes or pigments with a specific color, in combination with a special kind of IR-absorbing components (IR-marks). A set of colors to four-color printing process usually includes black, yellow, Magenta, and cyan colors. The inventors found that some of the IR-absorbing compounds that absorb radiation in the spectral region near 780 nm, can be added to the IR-transparent black, yellow and Magenta inks without significant changes visible properties of these paints, giving a clearly distinguishable peak absorption in the near infrared region of the spectrum. However, there were problems with the visibility of the peak in the near infrared region in the case of green and blue colors. Green and blue inks are usually based phthalocyanine dyes, such as C.I.Pigment Green 7 or C.I.Pigment Blue 15:3.

Phthalocyanines perfectly absorb visible light up to 750 nm or more is her. The peak absorption of the IR marker in the range from 700 to 900 nm in this case cannot be clearly detected in the presence of this pigment. As a result of this authentication reliability of marking is reduced.

The aim of the present invention is, thus, eliminating the drawbacks of the prior art and, in particular, offer the IR-absorbing four-color set of paints, printing products, printing and dye, which allows you to print protective signs in multi-color printing, which enables secure authentication, regardless of the color of characters.

This goal is achieved by using a set of printing inks, paints, printing products and printing method in accordance with the features of independent claims.

A set of inks for printing light-absorbing signs in accordance with the present invention includes at least two inks of different colors. This set of colours allows, therefore, to print multi-color signs. Each of the paints mentioned set of colors includes at least one visible dye or pigment. The set of colors includes a first group of colors and a second group of colors. Paint the first group include a visible dye (pigment or dye) and an additional label such as IR-absorbing compound (And the tag), having given suitable for detecting spectral characteristics, mainly absorption characteristics, for example, a peak absorption at a specific wavelength in the near infrared (NIR) region of the spectrum. Spectral response means dependent on the wavelength of the optical characteristics of the label, such as (but not necessarily) absorption. Paint the second group include a coloring agent (pigment or dye), which absorbs light in the visible region of the spectrum (thereby producing a visible color) and at the same time, at least in part are substantially the same set of spectral characteristics, as mentioned above, the label used in the first group of colors. "At least partially" means in this context, at least within the given range of wavelengths. "The same set of spectral characteristics are substantially qualitatively the same curve of spectral absorption in the NIR region (>700 nm). "Qualitatively the same curves spectral absorption" in the context of this invention means that within the given range of wavelengths curves spectral absorption when compared detect the absorption maxima (peaks) and/or minima of the absorption and/or edge of the absorption band with a substantially t is x the same wavelengths. "Substantially the same wavelengths", in accordance with the present invention, typically are wavelengths that are not more than 10 nm from one another.

As alleged suitable for detection and other characteristics are specified spectral characteristics, such as the width of the peak absorption, the ratio of peak height to its width and curvature of the spectrum. In the context of this invention, the spectral characteristic of any coloring matter is any situation that is similar to the spectral characteristics of the label, when the presence or absence of both (dye and labels) can be detected using the same tool or system detection.

In particular, four-color set of paints that have certain characteristics of infrared absorption, can be obtained by mixing IR-absorbing labels to the IR-absorbing black, yellow and Magenta inks with the formation inks of the above-mentioned first group and the selection of a suitable coloring matter (dye or pigment) for the blue paint as the paint above the second group, and this dye must at the same time to show the desired blue color hue in the visible spectrum and the required characteristics of the IR absorption of the IR tags.

IR-Pro is this at all black paint differs that its basis is the pigment that absorbs all of the visible part of the spectrum (wavelengths from 400 to 700 nm) and do not detect significant absorption at wavelengths in the range from 700 to 2500 nm. IR-translucent black paint can be obtained, for example, on the basis of C.I.Pigment Black 31 or C.I.Pigment Black 32.

Later absorption characteristics will mean relative spectral characteristics depending on the wavelength. The invention, however, is not limited to the concept of absorption, because of the diffuse spectral spectral reflection or transmission is also well suited for determining the spectral characteristics of pigment or paint.

Similar spectral characteristics in practice means, for example, that the received ink to be detected in near-infrared distinct peak absorption, or other spectral feature at substantially the same wavelength as the peak or spectral characteristic IR-label, resulting in the paint above the above-mentioned first and second groups can be detected (authenticated) using the same IR-absorbing detector equipment. Typically, such detection equipment estimates the relative intensity of diffuse reflection at three or more different wavelengths in the spectral region B is, giving through this assessment of the position of the peak of infrared absorption.

Special importance is attached chemical resistance and light fastness of the dyes and pigments used in the context of the present invention. The pigments used for printing important documents or exchange, must have a resistance of 3 or above on a scale IWS (International Wool Scale). These pigments must also be resistant to the adverse environment in formulations of paints and printing, in particular to different types of chemical substances are used for drying paint, such as heat setting, catalytic exopolymeric, UV-initiated cationic or radical cross stitch etc. these pigments must ultimately be resistant to various organic solvents, acids and alkalis, as well as, in addition to industrial laundering.

The set of colors in accordance with the present invention creates, thus, the possibility of multicolor printing characters with hidden characteristics of the IR absorption of the valuable document: bill of identity document, securities, etc. or product. The paint can be successfully combined with the second set of inks of the same color, but does not exhibit the above characteristics of the IR absorption. This allows you to print the hidden IR-absorbing inform the tion within a multicolor image or piece of text. Of particular interest in this context is paired sverhnovoy two four sets of inks for printing of sotoodehnia originals: yellow, Magenta, cyan, and black, in which the first set contains an infrared absorbing characteristic, and the second set does not contain. Four-color set of inks for printing of sotoodehnia originals using yellow, Magenta, cyan and black base colors can be successfully used to represent a large part of the shades that are visible to the human eye.

In accordance with one of the preferred variants of the invention a set of printing inks includes four colors, with the colors required for the traditional four-color printing of sotoodehnia originals, i.e. black, yellow, Magenta and cyan. Above the first group of colors mainly includes black, yellow and Magenta. Above the second group of colors includes blue paint. It was found that there are suitable pigments blue tones, which at the same time have the suitable peak absorption in the near infrared region. The pigments of the second group of colors mainly choose from not containing metal unsubstituted or substituted phthalocyanines crystallographic form X.

X-form not containing metal CFT is luzyanina was first disclosed in US 3357989 and Sharp and London, J.Phys. Chem., 1968, 79 (9), 3230-3235. She has a special range of x-ray diffraction and photoconductivity properties, which can be used for Electrophotography. X-form can be obtained from less stable, but more common alpha - or beta-modifications by recrystallization of the acid or organic solvents or by heat treatment at elevated temperatures, as, for example, described in US 3594163, US 3567272, US 3932180, US 4098795, US 4814441, JP 7301932 A2, EP 269079 B1.

The term "X-form" was used to describe this particular, the most stable modification of unsubstituted not containing metal phthalocyanine

In the context of the present invention, the term "X-form" will also be used in a broad sense, including also the corresponding crystalline modifications substituted on the periphery do not contain metal phthalocyanines. From 1 to 16 peripheral hydrogen atoms in the four benzene rings of the phthalocyanine molecules can be easily substituted by chlorine atoms and numerous organic and inorganic groups.

There are also metal-containing phthalocyanine pigments that have a second peak absorption in the near infrared region of the spectrum are some modifications of copper-phthalocyanine (peak absorption at 730 nm) and titanium-f is Alozaina (peak absorption at 850 nm). Called metal-containing phthalocyanine compounds can also be further used in the context of the present invention, provided that there is a suitable IR-label to give the other colors of the same spectral absorption characteristics in the near infrared region.

IR-label is mainly a compound absorbing light in the wavelength range from 700 to 900 nm, showing no significant absorption in the visible region (400-700 nm), which is necessary in order to avoid interference with the visible color. This compound has a peak mainly at approximately 780 nm. IR-label mainly chosen from the group sensation-substituted copper phthalocyanines. These substituted phthalocyanines receive the usual way using the chlorination of copper phthalocyanine, followed by the interaction product of chlorination with unsubstituted or substituted sensationally. These are replaced by 12 to 16 available positions in the molecule of the phthalocyanine. Preferred IR-label, in the context of the present invention is p-colortool-peremeshannyj copper-phthalocyanine of the formula:

In accordance with another aspect of the invention features a printed product, including signs, which absorb light at a given wavelength in the near intracranially. These signs are printed using a set of inks, as described above.

In accordance with another aspect of the invention proposes a method of printing characters, absorbing light at a given wavelength in the near infrared region. This method includes the steps of applying at least one dye of the above-mentioned first group of colors and applying at least one dye of the above-mentioned second group of colors from above a certain set of colors.

The invention also provides the use of the IR coloring material (pigment or dye) in the paint, which is part of a set of colors for multicolor printing. This IR-dye absorbs light in the near infrared part of the spectrum in accordance with the individual characteristics of absorption and at the same time as the dye has a specific visible absorption (color). The set of colors includes at least one ink containing the dye or pigment. The set of colors includes, in addition, at least one ink containing coloring matter a great color, and optional IR-label, absorbing light in the near infrared part of the spectrum, showing the characteristic infrared absorption, similar to the characteristics of the IR-dye stuff. The invention relates primarily to the application does not contain metal phthalocyanine crystallographic form X, with the peak of the infrared absorption at 780 nm, as the IR coloring matter or pigment inks from a set of paints in combination with other inks containing a pigment which gives a visible tint, and IR-label, absorbing light in the range of wavelengths from 700 to 900 nm, with peak absorption at 780 nm, which substantially coincides with the peak absorption of the mentioned IR coloring matter or pigment. The expression "substantially identical" in the present invention means that the curves of the spectral absorption have maxima (peaks) of the absorption and/or region of minimum absorption at wavelengths that when comparing the curves of absorption of one another are separated from each other by not more than 10 nm.

Within the context of the present invention may be offered different options.

It is possible to propose the use of paint sets with less than four or more than four colors. While it is preferable to choose blue or green paint, with the inherent characteristics of IR absorption similar to the characteristics of the IR-absorption IR labels can be found and used other dyes with similar properties. You can also use pigments containing rare earth elements as labels that absorb in the infrared region. Such is pigmenti known to specialists in this field. These pigments can be useful additional properties such as the ability to enhance or weaken the luminescence, the value of which consists in performing the functions of additional security features. While IR-label and IR dyes that absorb light in the near infrared region of the spectrum, are the preferred variant of the present invention, the latter is not limited to the absorbers in the near infrared region. You can also use labels and dyes that absorb in the other within a wavelength outside the visible spectrum, such as infrared or ultraviolet regions.

Printed product may, for example, to be packing for valuable products that can be falsified, such as packaging for perfume, cigarettes, software for computers, etc. Printed product can also be a label that can be applied to any type of package or product. Printed products can also be valuable document, such as currency, stock certificates, tickets, etc. or the document proving the identity or rights, such as passport, ID card, driving license etc.

Paint in accordance with the present invention can be applied to the substrate using known methods of printing any t is PA, such as gravure printing, letterpress, screen and offset printing, and gravure and flexographic printing, ink jet printing and printing using electrostatic or electrophoretic toners.

Hereinafter the invention will be described in detail only on examples with reference to figures, which show:

Figure 1 - absorption spectra of yellow paint with or without labels, absorbing in the near infrared region,

Figure 2 - absorption spectra of Magenta with or without labels, absorbing in the near infrared region,

Figure 3 absorption spectrum of the dye absorbing in the visible and infrared region, without tags,

4 - absorption spectra of black paint, with or without labels, absorbing in the near infrared region,

Figure 5 - absorption spectra of green paint and blue paint without a label and blue paint with a label.

Figure 5 shows the absorption spectra of the traditional blue and green colors, which cannot be used in the context of the present invention. The blue paint on the basis of C.I.Pigment Blue 15:3 without IR label (cyan IRT) has significant absorption in the range from 550 to 750 nm. If this same blue paint mixes with the IR-absorbing label, the nature of the absorption in the range from 500 to 750 nm remains almost unchanged. In the range of from 750 to 900 nm, there is a small difference in absorption is the situation, however, in this interval there is no absorption, which could be easily detected. Almost the same conclusions can be made for the green paint on the basis of C.I.Pigment Green 7. Because in the near infrared region there are no detected peak absorption nor in the case of green, or in the case of blue paint, as shown in figure 5, these paints cannot be used in the same protected system in combination with IR-labeled yellow, Magenta and black colors, all of which have a distinct peak absorption at this wavelength.

1, 2 and 4 show absorption spectra of yellow, Magenta, and black inks as labeled, absorbing in the near infrared region, and without a label. Figure 3 shows the infrared absorption spectrum of the blue paint in accordance with the present invention, i.e. on the basis of IR-dye substances (IR-pigment), which has similar absorption absorption labels, absorbing in the near infrared region. Paint, absorption spectra are shown in Fig.1-4, form together a set of colors to four-color printing. These four basic colors can be used in standard four-color printing methods, providing a large number perceived by the human eye shades. All of the thus obtained color will have a peak in the near and prekrasnoi area at 780 nm as a hidden security feature. The resulting set of colors can be contact combined with paints conventional four-way, i.e. paints, not having called hidden NIR absorption, resulting in a printed surfaces will arise hidden BIK-marking.

Further, as an example, reveals a number of compositions for various print applications. The resulting colors can be combined in sets of colors, as described in the examples below.

To obtain the following paints for deep, lithographic and letterpress, these components are mixed and homogenized in a three-roll mill using two passes at 30 bar.

Blue ink for gravure printing

- Product connection Tung oil modified
maleic acid phenolic resin in a high-boiling
mineral oil PKWF 28/31)35,0%
- Deep polymerized alkyd resin7,5%
- Alkylphenol resin, modified crude
Tung oil in the solvent for paints 27/29 (Shell Ind.
Chemicals)16,0%
- P is literraly wax 1,5%
- Calcium carbonate32,8%
X-form phthalocyaninato pigment, for example unsubstituted
not containing metal dihydroartemisinin (Cs-H2)
crystallographic form X2,0%
- Paint thinner 27/29
(Shell Ind. Chemicals)5,0%
- Octoate cobalt (10% metal)0,1%
- Octoate manganese (10% metal)0,1%

Blue ink for lithographic printing

- modified phenolic resin
resin, impregnated with linseed oil33,0%
- Deep polymerized alkyd resin42,2%
- Polyethylene wax2,0%
- Paint thinner 27/29
(Shell Ind. Chemicals)2,0%
- Boiled linseed oil5,0%
X-form phthalocyaninato pigment, for example unsubstituted
not containing metal dihydroartemisinin (Cs-H2)
crystallographic form X 10,0%
- Titanium dioxide5,0%
- Octoate cobalt (10% metal)0,8%

Yellow ink for lithographic printing

- modified phenolic resin resin, impregnated with
linseed oil31,5%
- Deep polymerized alkyd resin38,7%
- Polyethylene wax2,0%
- Paint thinner 27/29 (Shell Ind. Chemicals)2,0%
- Boiled linseed oil5,0%
- C.I. Pigment Yellow 1315,0%
- IR-label3,0%
- Titanium dioxide2,0%
- Octoate cobalt (10% metal)0,8%

Magenta ink for lithographic printing

- modified phenolic resin resin, impregnated with
linseed oil31,5%
- Deep polymerized alkyd resin38,7%
- Polyethylene wax2,0%
- Paint thinner 27/29 (Shell Ind. Chemicals)2,0%
- Boiled linseed oil5,0%
- C.I. Pigment Red 12215,0%
- IR-label3,0%
- Titanium dioxide2,0%
- Octoate cobalt (10% metal)0,8%

Black ink for lithographic printing

- modified phenolic resin resin, impregnated with
linseed oil30,0%
- Deep polymerized alkyd resin36,0%
- Polyethylene wax2,0%
- Paint thinner 27/29 (Shell Ind. Chemicals)2,0%
- Boiled linseed oil5,0%
- C.I. Pigment Black 3118,0%
- C.I. Pigment Violet 231,2%
- IR-label3,0%
- Titanium dioxide2,0%
- Octoate cobalt (10% metal)0,8%

Ink for relief printing

- modified phenolic resin resin, impregnated with
linseed oil29,5%
- Deep polymerized Alcide the second resin 38,7%
- Polyethylene wax2,0%
- Paint thinner 27/29 (Shell Ind. Chemicals)2,0%
- Boiled linseed oil5,0%
- The content of pigments10,0%
- Titanium dioxide6,0%
- Silicon dioxide (Aerosil 200, Degussa-Huels AG)6,0%
- Octoate cobalt (10% metal)0,8%

To obtain the following inks for gravure printing, the mixture components are first homogenized in a ball mill and the resulting colorful concentrate is diluted with the specified quantities of solvent. In conclusion, the viscosity is adjusted to a value of 18" DIN4 using a mixture of ethyl acetate/ethanol (2:1), preferably immediately before printing.

Blue paint for engraving printing

- Ethanol20,0%
The ethyl acetate19,5%
- Dicyclohexyltin (Unimoll 66, Bayer)4,0%
- Rosin modified with fumaric acid (Rokramer
7200 supplied by Robert Kraemer GmbH & Co)4,0%
- Polyvinyl butyral resin (Piolofbrm BN18 supplied9,5%
Wacker-Chemie)
X-form phthalocyaninato pigment, for example unsubstituted
not containing metal dihydroartemisinin (Cs-H2)
crystallographic form X5,0%
- *** grinding ball mill
- Ethanol12,0%
The ethyl acetate26,0%
- *** viscosity correction to 18" DIN4 with EtAc/EtOH (2:1)

Yellow ink for gravure printing

- Ethanol20,0%
The ethyl acetate19,5%
- Dicyclohexyltin (Unimoll 66, Bayer)4,0%
- Rosin modified with fumaric acid (Rokramer
7200, Robert Kraemer GmbH & Co)4,0%
- Polyvinyl butyral resin (Pioloform BN18 supplied
Wacker-Chemie)9,0%
- C.I. Pigment Yellow 137,0%
-IR-label1,0%
- *** grinding ball mill
- Ethanol
The ethyl acetate12,0%
- *** viscosity correction to 18" DIN4 with EtAc/EtOH26,0%
(2:1)

Black ink for gravure printing

- Ethanol19,5%
The ethyl acetate19,0%
- Dicyclohexyltin (Unimoll 66, Bayer)4,0%
- Rosin modified with fumaric acid (Rokramer
7200, Robert Kraemer GmbH & Co)4,0%
- Polyvinyl butyral resin (Pioloform BN18 supplied
Wacker-Chemie)9,0%
- C.I.Pigment Black 318,0%
- C.I.Pigment Violet 230,5%
- IR-label1,0%
- *** grinding ball mill
- Ethanol12,0%
The ethyl acetate26,0%
- *** viscosity correction to 18" DIN4 with EtAc/EtOH (2:1)

IR-label all relevant to the problem cases is a pigment selected from the class mentioned above basaltic-substituted copper phthalocyanines.

Paint, absorption spectra are shown in figure 1-4, are the subject of example 1 set of paints ACC is accordance with the present invention.

Example 1

An example set of colors includes four lithographic printing inks (black, Magenta, yellow, and blue), prepared in accordance with the above recipe.

Yellow paint:

Absorption spectra of yellow paint is shown in figure 1. Yellow paint without IR label (solid line) has an absorption edge at approximately 500 nm and negligible absorption from 520 to 1100 nm (solid line). The yellow paint is mixed to it IR label has an additional, due to the IR-label peak absorption at 780 nm (dashed line). Peak at 780 nm can be easily detected using a suitable detection system.

Purple paint:

Figure 2 shows the absorption spectrum of the Magenta ink without IR label and purple paint set paint in accordance with the invention. Purple paint without IR label (solid line) has a peak absorption C.I.Pigment Red 122 at approximately 530 nm. The paint has negligible absorption from 650 to 1100 nm. Purple paint with mixed thereto IR label (dashed line) has an additional, due to the IR-label peak absorption at 780 nm.

Blue paint:

Figure 3 shows the absorption spectrum of the blue paint. The blue paint has a peak absorption at about 600 nm, resulting in a visible blue color paint. Pigment blue the paint filled in a manner that so he had an additional peak absorption at 780 nm. Peak absorption at 780 nm has a shape similar to the shape of the peak absorption of the IR tags contained in the yellow or Magenta paint (see figure 1 and 2) or in black ink (see figure 4). In the blue paint you want to use the IR tag, because the blue paint performs the function as the visible absorption (color), and absorption in the near infrared (IR-label).

Black paint:

Absorption spectrum of NIR-transparent black paint first example of the set of colors is shown in figure 4. Solid line shows the spectrum of colors without added IR label. The paint has quite a broad and strong absorption from 400 to 670 nm and negligible absorption from 700 to 1100 nm. Adding IR label black paint has an additional peak absorption at 780 nm (dashed line).

A set of paints, including paints, as shown in figure 1-4, makes possible the printing of characters of any color using the standard four-color method. All of the thus obtained color are clearly detected peak absorption at 780 nm.

IR-label picked so that it does not adversely impact on shades of yellow, Magenta, and black inks, i.e. the IR mark must not have significant absorption in the visible region of the spectrum.

Example 2

The subject of the example which set of colors in accordance with the invention are three gravure inks (black, yellow and blue), prepared in accordance with the above formulation. The resulting set of colors can be used for printing on packages with hidden IR-absorbing Makarovka performed with the purpose of trademark protection.

The present invention discloses, therefore, a set of printing inks, including inks of the second group on the basis of absorbing in the visible and infrared regions of the pigment selected so that it has substantially the same absorption characteristics in the near infrared region as paints first group on the basis of transparent in the infrared region of pigments and separately added absorbing in the near infrared region of the label.

The IR-absorbing element colors in accordance with the present invention can be detected and, thus, confirmed by a number of different ways. The first method of detection involves measuring the spectrum of the diffuse reflectance of the printed sample. Obtained when the spectral reflectivity curve analyzed by IR-devouring peak located close to the preset corresponding wavelength (780 nm in the above-described preferred choice).

The result of this analysis, i.e. the presence or absence of the above peaks is used as the criterion of authenticity of peccatophobia. The test method requires equipment with the spectrometer, and related processing tools.

The basis of the second simplified method is that the light source used is a small incandescent lamp and 4 photodector channel included in a portable device. Each of these photodetecting channels has an optical band-pass filter, silicon photodiode and toxoplasmic the voltage amplifier. Conclusions four amplifiers connected to the programmable circuit is a microcontroller, which also regulates the light source. Optical bandpass filters are open at 730±10 nm, 780±10 nm, 830±10 nm, 980±10 nm; and the first figure indicates the Central wavelength, and the second figure is the half-width of the strip. The circuit of the microcontroller is programmed for reading the four intensity values obtained from four photodetecting circuits, and calculate the three intensity ratio: R1=I(730)/I(980); R2=I(780)/I(980) and R3=I(830)/I(980). The reflected intensity at 980 nm, 1(980) is used as a signal comparison in order to make the measured values of R1, R2 and R3 are not dependent on the irradiation intensity. To detect the peak of the infrared absorption at 780 nm, the value of R2 should be at a certain level below the values of R1 and R3. The microcontroller is programmed, in addition, to issue the log of such tests and issuance of confirming or denying authentication signal as a result of the operation test.

Third, an even more simplified, the method includes the use of simple photodetecting circuit without an optical filter along with four light-emitting diodes emitting at four different wavelengths. Photodetector circuit includes a silicon photodiode and toxoplasmic the voltage amplifier, the output of which is connected to the programmable circuit is a microcontroller. The circuit of the microcontroller regulates four light emitting diodes, which are chosen so that they radiated on the center wavelength of 740 nm, 770 nm, 810 nm and 950 nm. The radiation of the light emitting diode has a spectral width of about 40 nm, so the diodes can be used for exposure of successive portions of the absorption characteristics of the sample. For test printing sample circuit of the microcontroller is programmed to irradiation of a sample by sequentially four light sources with up to four wavelengths and recording the intensity of the corresponding signal diffuse reflection received from photodetector chain. As before, expect the relations R1=I(740)/I(950); R2=I(770)/I(950) and R3=I(810)/I(950) (where the reflection intensity at 950 nm is used as an intensity reference) and the presence or absence of the peak at 780 nm is detected by comparing the R2 with R1 and R3.

1. A set of printing inks for printing Svetog amausi characters comprising at least two colors, where each of these colors has at least one dye, pigment or dye absorbing visible light, and a set of colors includes a first group of colors and a second set of paints, and paint the first group optionally include a label with a given spectral absorption characteristic, mainly characteristic related to the absorption, while the label has an absorption peak absorption in the wavelength interval from 700 to 900 nm, preferably, at 780 nm, and the label practically does not absorb in the visible absorption spectrum, and

paint the second group contains the dye, the dye or pigment absorbing light in the visible absorption spectrum, and have the same peak absorption in the infrared region at a wavelength of about 700 nm, similar spectral characteristics in the infrared region of the label.

2. A set of printing inks according to claim 1, in which the dye, the dye or pigment of the second group of ink absorption has a peak absorption in the infrared region at a wavelength of not less than 10 nm from the wavelength of the absorption peak of the absorption in the infrared region of the label of the paint of the first group.

3. A set of printing inks according to claim 1, in which a set of colors consisting of black, yellow, Magenta, and cyan inks.

4. Set print Krasko to claim 1, in which the first group of colors includes black, yellow and Magenta ink, and the second group of colors includes blue or green paint.

5. A set of printing inks according to claim 1, in which the dye ink of the second group is phthalocyanine, mostly, not containing metal filled dihydroartemisinin crystallographic form X.

6. A set of printing inks according to claim 1, in which the dye of the second group of ink absorption has a peak absorption in the wavelength interval from 700 to 900 nm, mainly at 780 nm.

7. A set of printing inks according to claim 1, in which the label is sensation-substituted copper phthalocyanine.

8. A set of printing inks according to claim 1, in which the label practically does not absorb in the visible absorption spectrum.

9. A set of printing inks according to claim 1, in which the label has a light fastness of at least 3 according to the international wool scale.

10. A set of printing inks according to claim 1, in which the dye, the dye or pigment has a light fastness of at least 3 according to the international wool scale.

11. The printed product is coated with a light absorbing characters, which are printed using a set of inks according to one of claims 1 to 10, containing at least two colors that absorb visible light, and each of these colors has at least one dye, KRA is Italy or pigment, and a set of printing inks contains a first group of colors and a second set of colors, where the colors of the first group include an additional label with the given spectral mainly absorption characteristic, and the label has an absorption peak absorption in the wavelength interval from 700 to 900 nm, preferably, at 780 nm, and the label practically does not absorb in the visible absorption spectrum, and paint the second group contains the dye, the dye or pigment absorbing light in the visible absorption spectrum and have the same spectral absorption peak of the absorption in the infrared region at a wavelength of about 700 nm, similar to the spectral the characteristics of the label.

12. The method of printing characters having a predetermined spectral characteristic of the product, mainly by using a set of inks according to one of claims 1 to 10, comprising the stage of applying at least one ink containing the coloring matter of the first group of colors, and applying at least one ink of the second group of ink having a color different from colors of the first group, where the colour of the first group include an additional label with the given spectral absorption characteristic, and the label has an absorption peak absorption in the wavelength interval from 700 to 900 nm, preferably, at 780 nm, and label practically does not absorb in the visible spectrum will the tion, and paint the second group contain a dye which absorbs light in the visible absorption spectrum and has the same spectral peak absorption in the infrared region at a wavelength of about 700 nm, similar to the spectral characteristics of the label.

13. The application of the coloring matter having specific spectral characteristics, as the coloring matter of the set of colors, including at least one additional ink containing coloring matter a great color and has additional label that has the same peak absorption in the infrared region at a wavelength of about 700 nm, similar to the characteristic of the coloring matter, in this case the label has an absorption peak absorption wavelength in the range from 700 to 900 nm and label practically does not absorb in the visible absorption spectrum.

14. Double set of colors, including traditional four-color set of paints and a set of inks according to one of claims 1 to 10.



 

Same patents:

FIELD: labels with diffraction barcodes and reading device for information recognition on such labels.

SUBSTANCE: label contains at least one machine-readable diffraction barcode, which consists of narrow rectangular fields and intermediate surfaces covered by optically active structures. Optically active structures covered by reflecting layer are sealed in layers of laminated structure. Relief structure of fields diffracts and polarizes in defined plane the incident light and disperses the diffracted light into half-space above the diffraction relief structure. Other microscopically small optically active structures differ from the diffraction relief structure by at least polarizing capabilities. Polarized back-scattered light can be registered by one of the known standard reading devices for barcodes made by printing technique.

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FIELD: contactless chip-card and method for manufacturing contactless chip-cards.

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7 cl, 2 dwg

FIELD: products marking methods using holograms.

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FIELD: technology for manufacturing plastic cards with chip (cards with inbuilt micro-circuit).

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6 cl, 2 dwg

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Code device // 2285953

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FIELD: printing inks.

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20 cl, 4 tbl, 6 ex

The invention relates to the printing industry, namely the production of printing inks for inkjet printers

The invention relates to ink for ink-jet printing, including personal printers

The invention relates to the technology of binders based Uralkalij products intended for use as paints and other coatings for the surface treatment and finishing of various materials based on paper (decorative, label paper, Wallpaper, securities and so on)

FIELD: printing inks.

SUBSTANCE: invention relates to materials generating charge, in particular to printing inks and toners for protective marking and applying protective markers in order to reveal falsifications and counterfeits. Use of counterfeit protection technology is described involving printing ink composition containing charge-generation substance and a medium, wherein charge-generation substance has maximum absorption in near IR region within a range of 700-1500 nm and in visible region within a range of 400-700 nm, this substance being compound selected from a type of polymorphous modification of X form of metal-free phthalocyanine, type of polymorphous modification of Y form and phase I and II forms of titanyloxyphthalocyanine, polymorphous modification of phase II form of vanadyloxyphthalocyanine, and polymorphous modification of phase V form of hydroxygalliumphthalocyanine and methoxygalliumphthalocyanine. Printing ink composition is applied onto an article or substrate using known printing procedure. Methods of establishing authenticity of an article or substrate are also described, which consist in determining characteristic absorption of marker in near IR region.

EFFECT: enabled effective protection of articles or substrates when using printing inks containing, for example, blue or green dyes, whose absorption bands can be shifted to infrared region and partially mask absorption properties of marker.

20 cl, 4 tbl, 6 ex

FIELD: dyes.

SUBSTANCE: invention relates typography dyes, in particular, to dye for deep printing. Invention describes dye for deep printing comprising the first binding agent chosen from group of water-soluble or water-diluted acrylate oligomers, photoinitiating agent and, optionally, a monomer as the second binding agent chosen from group consisting of water-soluble or water-diluted monomers of polyethylene diacrylates or polyethoxylated triacrylates used for correction of the composition dye viscosity value. Dye can comprise additives, such as pigments, filling agents, photosensitizing agents, photostabilizing agents and special pigments. Dyes shows viscosity value from 7 to 60 Pa . s at temperature 40°C and dispersed completely in aqueous washing off solution with sodium hydroxide in the concentration from 0 to 0.5 wt.-%. Dyes possesses the excellent capacity for paint removing and it is can be precipitated from the indicated washing off solution.

EFFECT: improved and valuable properties of dye.

28 cl, 9 ex

FIELD: paint and varnish materials.

SUBSTANCE: invention relates to water-diluting paint and varnish covers preparing by the electrolytic precipitation method on cathode and can be used in preparing protective covers. The composition comprises the following components, mas. p. p.: 60-70% solution of epoxyamino-rubber adduct modified with melamine-formaldehyde resin and neutralized partially with formic acid in the mixture of ethylglycol acetate and butanol, 190-210; acetic acid, 2-16; mixture of epoxydiane resin of molecular mass 350-600 Da and the content of epoxy groups 14.5-24.8% with xylene taken in the ratio = 4:1-18-22, mixture of fluoroplastic F-4D suspension with distilled water taken in the ratio = 1:6-800-1600. Covers made of the proposed composition are stable against temperature drops, hydrogen and saline mist.

EFFECT: improved and valuable properties of composition.

1 tbl

FIELD: dyes, building materials.

SUBSTANCE: invention relates to sets of dye semifinished products used in preparing dyes of different designation. Invention describes the dye semifinished product with properties of fluidity and covering power that can be used in preparing a single-package latex dye stained with pigment wherein the volume content of dry matter is from about 30% to about 70% with the Schtormer viscosity value from about 50 to about 250 EK and comprising the following components: (I) at least one pigment conferring the covering power property; (II) at least one dispersing agent; (III) at least one thickening agent, and (IV) water wherein at least one dispersing agent and at least one thickening agent are compatible with at least one pigment and other dye components. Also, invention describes sets for dyes and dye lines comprising a latex polymeric binding agent. Some dyes for internal and external coating of different objects are prepared by using sets of dye semifinished products. Invention provides preparing the broad assortment of dyes of different quality for external and internal workings and with different levels of polishes and bases for carrying out the coloring from dye semifinished products and by using the minimal amount and types of the dye components. Proposed dye semifinished products can be used for architecture, industrial, polygraphic, elastomeric and non-cement coatings.

EFFECT: improved preparing method, valuable properties of dyes.

51 cl, 3 tbl, 63 ex

FIELD: ink-jet printing facilities and materials.

SUBSTANCE: invention relates to ink-jet printing on sheet-shaped substrates such as paper, films, and textiles. In particular, invention discloses a method for ink-jet printing on sheet-shaped substrates using aqueous ink including (i) at least one dye of formula (I): (I), wherein R1 and R2, each independently of the other, represents hydrogen atom or unsubstituted or substituted C1-C4-alkyl; R3 and R4, each independently of the other, represents unsubstituted or substituted C1-C4-alkyl; R5 and R6, each independently of the other, represents C1-C4-alkyl, C1-C4-alkoxy, halogen atom, hydroxyl, carboxyl, C2-C4-alkanoylamino, or sulfo group; X represents halogen atom, hydroxyl, C1-C4-alkoxy optionally substituted in alkyl residue, phenoxy optionally substituted in phenyl residue, C1-C4-alkylyhio optionally substituted in alkyl residue, phenylthio optionally substituted in phenyl ring, amino, C5-C7-cycloalkylamino optionally substituted in cycloalkyl residue, phenyl- or naphthylamino optionally substituted in aryl residue, N-C1-C4-alkyl-N-phenyl- or N-C1-C4-alkyl-N-naphthylamino optionally substituted in aryl residue, benzylamino optionally substituted in phenyl residue, morpholine, or pyperidin-1-yl; and n and m each is a number 0, 1, 2, or 3; and (ii) compound selected from polyethylene glycols with molecular mass from 150 to 400.

EFFECT: enabled producing light-resistant and moistureproof prints with elevated saturation of color.

12 cl, 1 tbl

FIELD: rubber industry; production of elastomer compositions on base of ethylene-propylene-diene rubber; production of roofing materials for hydraulic insulation of buildings, bridges, tunnels, roof coats.

SUBSTANCE: proposed rubber mix contains the following components: ethylene-propylene-diene rubber, butyl rubber or regenerate on base of butyl rubber, anti-oxidant, plasticizing agent (paraffin, mineral oil, chloro-paraffin), commercial carbon, chalk and/or kaolin and bitumen, colophony or benzoic acid, if necessary. Rubber mix may also contain Captax (rubber accelerating agent), thiuram or zinc ethyl diethyl dithiocarbomate, antimony trioxide, aluminum hydroxide, stearic acid and zinc oxide at definite ratio. Rubber mix is prepared on standard equipment of rubber industry.

EFFECT: enhanced resistance to burning and frost.

4 cl, 4 tbl

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