Sheet for printing with improved drying time of image

FIELD: printing.

SUBSTANCE: present invention relates to a sheet for printing having improved drying time of the image. The sheet for printing comprises a substrate comprising lignocellulosic fibres, and at least 0.02 g/m2 of a water soluble divalent metal salt which is applied by a gluing press. The test value of gluing Hercules ("HST") of the substrate is about from 3 seconds to 300 seconds. The HST value and the amount of divalent metal salt is selected so that the sheet for printing has a percentage of ink transfer ("IT%") equal or less than about 60.

EFFECT: proposed sheet for printing provides improved drying time of the image.

27 cl, 6 dwg, 10 tbl, 4 ex

 

Technical field: the Present invention relates to plates for printing. More specifically, the present invention relates to sheets for printing with improved drying time of the image and, in particular, to the sheet for printing on a paper basis, which is suitable for use as a worksheet for any printing or writing. Although the sheet for printing of the present invention is suitable for use in any method of printing, it is particularly suitable for methods of inkjet printing.

Art: Famous sheets for printing. See, for example, U.S. patents№№6207258; 6123760; 6162328; 4554181; 4381185; 6880928; 6207258; 6123760; 6162328; 6485139; 6686054; 6761977; 6764726 and the European patent no EP 0999937 and EP 0999937.

BRIEF description of the INVENTION

One aspect of the present invention is directed to use when printing the sheet to be printed, containing base, which contains fiber lignocellulose and water-soluble salt of the divalent metal is preferably on one surface of the base, and is a test of sizing Hercules ("HST") basis and the amount of the salt of divalent metal chosen so that the sheet for printing had a percentage of Krasnoperekopsk ("IT%"), equal to or less than 60. In preferred variants of the invention, the water-soluble salt of the divalent metal is a mixture which also contains one or more starches, Odori more polymer emulsion additives, one or more nitrogen-containing compounds or a combination thereof.

The sheets for printing of the present invention have one or more advantages compared to traditional sheets for printing. For example, the sheets for printing of the present invention have one or more properties improved drying time of the image. These improved properties include low ink deposits stay immediately after printing, improved black density on the image and improved the sharpness of the edges when printing based paints are pigments.

Another aspect of the present invention relates to a method of forming a sheet for printing of the present invention, which includes:

(a) applying a liquid composition containing a volatile liquid, such as water, methanol and the like, dissolved in one or more water-soluble salts of divalent metals and one or more starches, one or more polymer emulsion additives, one or more nitrogen-containing compounds or their combination, on the surface of the base, formed of fiber lignocellulose and having in contact with at least one surface of the water-soluble salt of the divalent metal, and is a test of sizing Hercules ("HST") basis and the amount of the salt of divalent metal chosen so that the sheet for printing the tee had a percentage of Krasnoperekopsk ("IT%"), equal to or less than 60, for forming soaked and processed basis, having referred to the species or the said mixture in contact with said surface; and

(b) drying said surface referred soaked and processed the basis for the formation of this sheet for printing.

Another aspect of the present invention relates to a method of creating images on the surface of the sheet for printing in the printing device, and the method includes:

(a) introduction in the above-mentioned device of the sheet to be printed, containing base, which contains fiber lignocellulose and water-soluble salt of the divalent metal, and is a test of sizing Hercules ("HST") basis and the amount of the salt of divalent metal chosen so that the sheet for printing had a percentage of Krasnoperekopsk ("IT%"), equal to or less than 60, and

(b) forming the image on at least one surface of the above-mentioned sheet for printing. In preferred embodiments, the implementation of the printing device is an inkjet printer, and an image is formed by ejection of ink from the said device to the surface of the sheet for printing.

BRIEF DESCRIPTION of DRAWINGS

The above and other aspects and advantages of the invention will now be described together with the attached drawings, on which:

Figure 1 - graph of g is perenosa (%) against the values of the HST base paper;

Figure 2 - graph of Krasnoperekopsk (%) coverage against salt - calcium chloride (g/cm);

Figure 3 - graph black density (OD0against the HST values of the underlying securities;

4 is a graph black density (ODOagainst the coating with salt - calcium chloride (g/cm);

5 is a graph of the sharpness of the edge (EA) against the values of the HST base paper;

6 is a graph of the sharpness of the edge (EA) against the coating with salt - calcium chloride (g/cm).

DETAILED description of the INVENTION

The present invention relates to a sheet for printing used for printing, which includes a base formed of fiber lignocellulose and having in contact with at least one surface of the water-soluble salt of the divalent metal. The authors unexpectedly found that the level of the sizing basis, measured by the value of the HST basis, and the amount of salts of divalent metals on the surface of the substrate affect the drying time of the image on the sheet to print. The sheet for printing of the present invention has an improved drying time, which is determined by the amount of ink transferred to the print area on a blank area of the worksheet to print after rolling roller fixed mass. "Ink deposits stay"is defined as the optical density transferred after rolling roller; it is expressed as a percentage of optical density transferred is but an empty area of the sheet for printing after rolling roller. The method includes printing blocks of solid color on paper, waiting for a fixed time of 5 seconds after printing, and then folding the paper in half so that the print area touched on a blank area of the sheet for printing, and rolling a hand roller weighing 4.5 pounds, for example roller No. of HR-100 from the company Chem Instruments, Inc., Menton, Ohio, USA. The optical density was measured on a portable (ODT), not portable (ODAbout) block and an empty area (ODB) using a reflective densitometer (X-Rite, Macbeth. Etc.). The percentage of transfer ("IT%") define as IT%=[(ODT-ODB)/(ODAbout-ODB)]X100.

The value of the test sizing Hercules ("HST") basis and the amount of the salt of divalent metal chosen so that the sheet for printing had a percentage of Krasnoperekopsk ("IT%"), equal to or less than about 60. Preferably, IT% ranges from 0% to approximately 50%. More preferably, IT is from 0% to approximately 40%. Most preferably, 1T% ranges from 0% to approximately 30%.

In addition to improved drying time of the image some of the sheets for printing of the present invention preferably have good print quality. Used herein, the term "print quality" (PQ) measured on two important parameters: the print density and the sharpness of the edges. The print density was measured with the help of rateling densitometer (X-Rite, Macbeth. Etc.) in units of optical density ("OD"). This method involves printing a solid color blocks on the sheet and the measurement of optical density. There are some changes in the optical density depending on the printer and the selected print mode, and the mode of operation of the densitometer and color settings. In the method of the present invention used the HP Deskjet 6122, manufactured by Hewlett-Packard, which used the black cartridge No. 45 (catalog number HP A). The print mode determined by the type of paper and the selected print quality. For the data of the present invention was selected default uncoated paper and print quality mode "fast normal". Used spectral densitometer X-Rite model 528 with a 6 mm aperture Values when the density measurement were: color "Visual", the status of T and the mode of the absolute density. The improvement in density printing is usually seen when the surface of the paper are a sufficient number of water-soluble salts of divalent metals. In General, the target optical density for black pigment ("ODAbout") equal to or greater than 1.30 in standard (uncoated paper, normal printing mode for desktop inkjet HP printers that use the regular black ink (equivalent to the ink cartridge No. 45 alastruey print). Preferably, ODAboutequal to or greater than approximately 1,40. More preferably, ODAboutequal to or greater than approximately 1,50. Most preferably, OD equal to or greater than approximately 1.60.

Another parameter of sheets for printing, which is important for the definition of good print quality, is the sharpness of the edges ("EA"). Some of the sheets for printing of the present invention have a good edge sharpness. The sharpness of the edge is measured by such a device as a Personal system of image analysis company QEA (Quality Engineering Associates, Burlington, Massachusetts), the system QEA ScannerIAS or the ImageXpert system KDY-based camera. All these devices receive the enlarged digital image of the sample and calculate the sharpness of the edges by image analysis. This value is also called the distortion region, and it is defined in ISO 13660. This method involves printing a solid line with a length of 1.27 mm or more with a resolution not less than 600 dpi. The device calculates the location of the edge based on the dark color of each pixel is near the edges of the line. The threshold value for the edge is defined as the point 60% of the transition from the reflection coefficient of the base (bright region, Rmax) to the reflectance image (dark region, Rmax) using equation R60=Rmax-60%(Rmax-Rmin). After that, the distortion of the edge od edalat as the standard deviation of the differences from the line selected to the threshold value of the edge line is calculated perpendicular to the fitted line. Is the sharpness of the edge is preferably less than about 15, preferably, EA is less than about 12. More preferably, the EA is less than approximately 10. Most preferably, the EA is less than about 8.

One important component of the sheet for printing of the present invention is a basis consisting of fiber lignocellulose. The type of fibers is very important, and you can use any of these fibers, known in the manufacture of paper. For example, the base may be made from fibers derived from hardwood trees, softwood trees, or a combination of deciduous and coniferous trees prepared for use in compositions for making paper by any known method of cooking, refining and bleaching, as for example the well-known mechanical, thermomechanical, chemical and Poluchenie ways and other ways of producing wood pulp. The term "deciduous wood pulp", as used here, refers to fibrous masses, obtained from the wood of deciduous trees (Metasperm), such as birch, oak, beech, maple and eucalyptus, while the term "coniferous wood pulp" refers to fibrous masses, obtained from wood of coniferous trees (goosem is, R), such as various species of spruce and pine, for example, pine incense, Caribbean pine, prickly spruce, balsam fir and fir dupacova. In some embodiments, the implementation of at least part of the fibers may be derived from non-woody herbaceous plants, including, without limitation, kenaf, hemp, jute, flax, sisal or abaku, although legal restrictions and other considerations may make the use of cannabis and other sources of fibers impractical or impossible. In the method of the present invention can be used bleached or unbleached pulp. Also suitable for use in the secondary fiber pulp. In one preferred embodiment, the cellulose fibers in the paper include from about 30% to about 100% by dry weight softwood fibers and from about 70% to about 0% by dry weight of hardwood fibers.

In addition to the fiber lignocellulose base may also contain other conventional additives, such as fillers, means holding, wet-strength resins and shopruche resin, which can be introduced to the fundamentals-based fiber lignocellulose. Among the fillers that may be used inorganic and organic pigments, such as, for example, minerals such as calcium carbonate, barium sulfate, titanium dioxide,calcium silicates, mica, kaolin and talc, and polymer particles, such as latexes of polystyrene and polymethylmethacrylate. Other conventional additives include, without limitation alum, fillers, pigments and dyes.

The paper base may also include an expanded or unexpanded microspheres, dispersed in the fibers lignocellulose. Advanced and expandable microspheres are well known in the art. For example, suitable expandable microspheres described in thoroughly review the application with the serial number 09/770,340, filed January 26, 2001 and serial number 10/121,301, filed April 11, 2002; U.S. patent№№3,556,934, 5,514,429, 5,125,996, 3,533,908, 3,293,114, 4,483,889 and 4,133,688; and in the patent application in the UK No. 2307487, the contents of which are incorporated herein by reference. When implementing the present invention in practice can be used all conventional microspheres. Suitable microspheres are synthetic resin particles having a common spherical center containing liquid. The resin particles may be made of methymethacrylate, orthochlorotoluene, paleontological, polyvinylene-salgareda, Acrylonitrile, vinylidenechloride, para-tert-butylstyrene, vinyl acetate, butyl acrylate, styrene, methacrylic acid, vinylbenzyl-chloride, and combinations of two or more substances of you who upomjanutyh. The preferred resin particles contain a polymer containing from about 65 to 90 wt.% vinylidenechloride, preferably from about 65 to 75 wt.% vinylidenechloride and from about 35 to 10 wt.% Acrylonitrile, preferably from about 25 to 35 wt.% Acrylonitrile. Suitable expandable microspheres offered by the company Akzo Nobel, Marietta, GA., under the brand name EXPANCEL. Expandable microspheres and their use in paper materials are described in more detail in co-pending application, serial number 09/770,340, filed January 26, 2001 and co pending application, serial number 10/121,301, filed April 11, 2002, the contents of which are incorporated herein by reference.

The value of the test sizing Hercules ("HST") basis may vary within wide limits and is selected to obtain the desired characteristics drying time. The HST value measured under the conditions set forth in the standard method T 530 TAPPI using paint 1% formic acid and endpoint 80% reflectivity. This test is usually used for alkaline paper containing the filler is calcium carbonate, as stated in article S.R. Buna (S.R. Boone), published in TAPPI journal in February 1996, p.122. Is HST basics can be corrected by adding proclaime the corresponding substances in the basis. Preferably, the desired value of the HST was obtained by internal sizing basis; that is, to a sizing agent were added to the pulp suspension prior to its conversion in the paper or the canvas. Internal sizing helps to prevent swelling of the glued surface and turning in the sheet, allowing it to remain on the surface where it has maximum efficiency. Substances for internal sizing, which can be used to implement the present invention in practice, include any substances that are commonly used in the wet section of the paper machine. They include rosin adhesives, dimers and multimer of ketene and alkenylamine anhydrides. Internal adhesives are usually used in concentrations known in the art, i.e. from about 0 wt.% to 1.0 wt.% by weight of dry paper sheet. More preferably, the inner adhesive is used at a concentration of approximately from 0.01% to 0.5 wt.%. Most preferably, the inner adhesive used in concentrations of approximately from 0.025% to 0.25 wt.%. The methods and materials used for internal sizing are discussed E. Strazdins (.Strazdins) in the publication "the Sizing of paper" (The Sizing of Paper, Second edition, edited by OF Reynolds (W.F.Reynolds), TAPPI Press, 1989, p.1-33. Suitable dimer Ketanov for in the morning sizing disclosed in U.S. patent No. 4,279,794, which are incorporated herein in full by reference, in the patent of great Britain No. 786,543, 903,416, 1,373,788 and 1,533, 434, and in published European patent application No. 0666368 A3. Dimers of Ketanov are commercially available, for example in the form of a sizing substances Aquapel.RTM. and Precis.RTM. from Hercules Incorporated, Wilmington, Delaware. Multimer of Ketanov for use as an internal adhesives are described in published European patent application No. 0629741 A1, corresponding to patent application U.S. serial number 08/254,813, filed June 6, 1994, in published European patent application No. AS corresponding patent application U.S. serial number 08/192,570, filed February 7, 1994, and in the patent application U.S. serial number 08/601,113, filed on 16 February 1996. Alkenylamine anhydrides for internal sizing disclosed in U.S. patent No. 4,040,900, which is incorporated herein in full by reference, and in the publication SURDS Farley and RB of Wasser (S.E. Farley / R.B. Wasser) "the Sizing of paper (The Sizing of Paper, Second edition, edited by OF Reynolds (W.F. Reynolds), TAPPI Press, 1989, p.51-62. Various alkenylamine anhydrides offered for sale by the company Albemarle Corporation, Baton Rouge, Louisiana.

As is well known to the average expert in the art, the value of the HST will vary directly with the base weight of the fundamentals and other factors, well known to the average expert in the art, such as the number and type of internal sizing agent, and the type, number and surface area of the filler used paint and the end point of the reflectivity according to TAPPI T 530. Based on the above average person in the art can use traditional techniques and methods to calculate, determine and/or assess the specific values of the HST for the Foundation to provide the desired characteristics drying time of the image. In preferred embodiments, the implementation of the present invention is HST is from about 1 seconds to 400 seconds when using paint 1% formic acid and reflectivity of 80%. Is HST more preferably approximately from 3 seconds to 300 seconds, and most preferably from about 5 seconds to 200 seconds. In the best options for implementation of the HST value is approximately 20 seconds to 100 seconds.

The Gurley porosity of the basis is chosen so as to provide desirable characteristics drying time. The Gurley porosity was measured according to TAPPI method T om-88. In preferred embodiments of the invention, the base has a Gurley porosity of approximately 5 sec/100 ml to approx is positive with 75/100 ml. The Gurley porosity is more preferably approximately from 5 sec/100 ml to 70/100 ml and most preferably from about 5 sec/100 ml to 50 sec/100 ml In the best options for implementation, the Gurley porosity is approximately 10 seconds/100 ml to 35/100 ml

The diameter of the pores of the support is chosen to provide the desired characteristics drying time. The diameter of pores is measured by porosimetry method of introducing mercury. In preferred variants of the invention, the base has a pore diameter of approximately from 2.0 to 3.5. The diameter of pores is more preferably approximately from 2.2 to 3.3, and most preferably approximately from 2.4 to 3.1. In the best options for implementation of the pore diameter of approximately from 2.6 to 3.0.

The base may be any base mass. Preferably, the basis weight is from about 20 to 500 g/m2, although it may be outside this range. Basic weight, more preferably approximately from 20 to 300 g/m2 and most preferably from about 50 to 200 g/m2. In the best variants of the base weight is approximately 60 to 120 g/m2.

Suitable bases obtained by conventional methods, can be purchased from commercial sources, such as International Paper Company. Methods and devices for obtaining of the Nova of fiber lignocellulose well known in the manufacture of paper and cardboard. See, for example, "Handbook technologist pulp and paper industry", 2nd edition, Jay. CMYK, Angus Wilde Publications (1992) and specified reference material. You can use any traditional method and apparatus. Preferably, the method comprises: a) preparing a water suspension of fibers lignocellulose; (b) the formation and drying of the suspension fiber lignocellulose to obtain a dried paper web; (C) drying the paper web to obtain a dried paper web; and (d) calendering the dried paper web. In addition to these stages can be applied more stages of method, well known to the average expert in the art, as for example the step of coating one or more surfaces of the canvas, where this coating contains a binder with dispersing pigment.

The basis contains "effective amount" water-soluble salt of the divalent metal, preferably in contact with at least one surface of the base. Used herein, the term "effective amount" means an amount which is sufficient to improve the drying time basis on any amount. This is the total amount of water-soluble salt of the divalent metal in the base may vary widely provided that achieves the desired financial p is tat. Usually this amount is at least 0.02 g/m2, although you can use smaller or larger quantities. The amount of water-soluble salt of the divalent metal is preferably from about 0.1 g/m2 to 3 g/m2 and most preferably from about 0.2 g/m2 to 2.0 g/m2. In the best options for implementation of a number of water-soluble salt of the divalent metal is preferably from about 0.4 g/m2 to 1.5 g/m2.

When implementing the present invention into practice, you can use any salt of the divalent metal. Suitable water-soluble salts of divalent metals include without limitation compounds containing calcium or magnesium. The corresponding ions can vary widely and include chloride, sulfate, nitrate, hydroxide, etc. are Examples of such compounds include calcium chloride, magnesium chloride and calcium hydroxide. Preferred water-soluble salts of divalent metals to implement the present invention in practice are water-soluble calcium salts, especially calcium chloride.

In the most preferred embodiments of implementing the present invention, the mixture containing calcium chloride and one or more starches, is in contact with at least one surface of the base. Examples under Odesa starches for the implementation of this preferred variant of the invention are naturally occurring hydrocarbons, synthesized in corn, tapioca, potato and other plants by polymerization of dextrose units. All such starches and their modified forms, such as starch acetates, esters of starch ethers, starches, phosphate starches, xanthate starches, anionic starches, cationic starches, oxidized starches, etc. that can be obtained by reaction of starch with a suitable chemical or enzymatic reagent that can be used when implementing the present invention in practice. Suitable starches can be produced by known methods or obtained from commercial sources. For example, suitable starches include Ethylex 2035 company A.E. Staley, PG-280 company Penford Products, oxidized corn starches companies ADM, Cargill and Raisio and converted by the enzyme starches, such as Amyzet 150 companies Amylum.

The preferred starches for use in implementing the present invention in practice are modified starches. The preferred cationic starches are modified, chemically modified starches, such as leaded starches, oxidized starches and starch grain, converted AP and the enzyme, the most preferred are chemically modified starches, such as leaded to omaly, oxidized starches and starch grain, converted AP and an enzyme.

When using the preferred water-soluble salts of divalent metals, calcium chloride, and the preferred starch Ethylex 2035 desired drying time sheet is achieved when the mass ratio of calcium chloride with starch equal to or greater than approximately 5%-200%. In these embodiments, the implementation of the mass ratio of calcium chloride with starch is preferably approximately from 5% to 100%, more preferably from about 7% to 70% and most preferably from about 10% to 40%.

In these preferred embodiments, the exercise quantity of the mixture water-soluble salt of the divalent metal and one or more starches on the surface of the substrate may vary within wide limits, and can be used any known quantity. In General, the amount of the mixture in the base is at least about 0.02 g/m2 of the sheet for printing, although you can use more or fewer. This amount is preferably at least about 0.05 g/m2, more preferably at least about 1.0 g/m2 and most preferably from 1.0 g/m2 to 4.0 g/m2.

In addition to the required salt of divalent metal mixture that is used to handle the basics, maybe is to contain other ingredients in addition to starch, used in preferred embodiments of the invention, including pigment, usually applied to the surface of the sheet to be printed in conventional amounts. Such additional components include dispersing agents, substances for gluing surface, optical brighteners, fluorescent dyes, surfactants, deforming agents, preservatives, pigments, binders, chemicals for pH control, substance, releasing coating, etc.

Other auxiliary components are nitrogen-containing compounds. Suitable nitrogen-containing organic compounds are compounds, oligomers and polymers that contain one or more functional groups of the Quaternary ammonium. Such functional groups can vary widely and include substituted and unsubstituted amines, imine, amides, urethanes, groups, Quaternary ammonium, dicyandiamide, guandi etc. are Examples of such materials are polyamine, polyethyleneimine, copolymers of diallyldimethylammoniumchloride (DADMAC), copolymers of vinylpyrrolidone (VP) and stereoselectivity by diethylaminoethylmethacrylate (DEAMEMA), polyamides, cationic polyurethane latex, cationic polyvinyl alcohol, copolymers of polyalkylene and dicyandiamide attached polymers of minglecity, poly[axiety the Yong (dimethylimino) ethylene (dimethylimino) ethylene] dichloride, the guanidine polymers and polymeric biguanides. These types of compounds are well known and described, for example, in U.S. patent No. 4,554,181, 6,485,139, 6,686,054, 6,761,977 and 6,764,726.

Preferred nitrogen-containing compounds for use in implementing the present invention in practice are of low and medium molecular cationic polymers and oligomers having a molecular weight equal to or less than 100,000, preferably equal to or less than about 50,000, more preferably from about 10000 to 50000. Examples of such compounds are the copolymers of polyalkylene and dicyandiamide, poly[oksietilenom (dimethylaminoethyl (dimethylaminoethyl] dichloride and polyamine having a molecular weight in a desirable range. Preferred nitrogen-containing organic compounds for use in implementing the present invention in practice are low molecular weight cationic polymers such as a copolymer of polyalkylene and dicyandiamide, poly[oksietilenom (dimethylimino) ethylene (dimethylimino) ethylene] dichloride, guanidine polymers and polymeric biguanides. The most preferred nitrogen-containing organic compounds for use in implementing the present invention in practice are low molecular weight copolymers is a copolymer of polyalkylene and dicyandiamide is a, the guanidine polymers and polymeric biguanides, such as polyhexamethyleneguanidine.

The sheet for printing of the present invention can be manufactured using known methods. For example, significant one or more water-soluble salts of divalent metal, preferably mixed with one or more starches and one or more auxiliary components may be dissolved or dispersed in an appropriate liquid medium, preferably water, and can be applied on the basis of any known method, such as treatment in a size press, coating by dipping, coating reversing shaft, coating, extrusion and other Such methods of coating are well known in the art and will not be described here in detail.

For example, the coating can be applied in traditional equipment size press having a vertical, horizontal or inclined configuration size press used in the manufacture of paper, such as equipment type Symsizer (Valmet), KRK size press press (Kumagai Riki Kogyo Co., Ltd., Nerima, Tokyo, Japan) by coating by immersion. KRK size press is a laboratory size press, which simulates commercial size press. This sizing press about the commonly used sheet feed, whereas in the commercial sizing press is commonly used continuous canvas.

When processed by immersing the fabric of the processed material is transported below the surface of the liquid coating composition one shaft so that soaked up the open side, then the surplus of the processing mixture remove the pinch rollers and the fabric is dried at 100°C in an air dryer. The liquid processing composition usually contains a processing composition dissolved in a solvent such as water, methanol, etc. a Method of processing a substrate using a device for coating provides a continuous sheet of substrate with processing material is applied first to one side and then on the second side of the base. The Foundation can also be treated by the method of extrusion of the slots in which the flat filler is located in close proximity to the processed canvas basics, creating a continuous film processing solution uniformly distributed on one surface of the sheet, and then is dried in an air dryer at a suitable temperature, for example at 100°C.

On the sheet for printing of the present invention can be carried out printing by creating images on the surface of the sheet using traditional methods and printing devices, such as a manhole shall situations, inkjet, offset and flexographic. In this way the sheet for printing injected into the printing device, and on the surface of the sheet is formed image. On the sheet for printing of the present invention preferably print methods and inkjet printing devices, such as desktop inkjet printer and high-speed professional printer. One preferred implementation of the present invention is directed to a method of inkjet printing, which comprises applying the aqueous liquid for printing on the sheet for printing of the present invention in a form similar to the image. Another variant implementation of the present invention is directed to a method of inkjet printing, which includes: (1) introduction to the device, ink-jet printing containing the water-based paint, a sheet for printing of the present invention and (2) ensuring the ejection of drops of ink in a form similar to the image on the sheet for printing, this creating an image on the sheet to print. Methods of inkjet printing are well known and described, for example, in U.S. patent No. 4,601,777, 4,251,824, 4,410,899, 4,412,224 and 4,532,530. In a particularly preferred embodiment, the device for ink-jet printing method thermal inkjet printing, in which ink in the nozzles is selectively heated in the form of images, providing ejection of drops of ink on the form, under the Noi image. The sheets for printing of the present invention may also be used in any other way to print or create images, such as printing plotters, create images in color laser printers or copiers, hand writing with feathers, methods, offset printing, etc. under the condition that the toner or ink used for formation of images, compatible with kratkovremennym layer of the sheet for printing. The present invention will now be described with reference to the following examples. These examples are only illustrative, and the invention is not limited to the materials, conditions, or parameters of the methods described in the examples. All proportions and percentages are expressed by weight units, unless otherwise indicated.

Example 1

(A) Preparation of laboratory impregnating compositions

A series of compositions for coating was prepared in the following manner. The coating was prepared in a laboratory mixer with low shear force. In the container of coating added some water, and then added anhydrous calcium chloride (94-97%, minigranules from Dow Chemical Co., Midland, Michigan, USA) under sufficient shear force to dissolve. The composition of the coating and specifications are listed in table 1.

Table 1
Song
TrackCalcium chloride, sharesWater, shares
12,597,5
2595
31090

C. Preparation of processed basics

Several samples of commercially available base paper with a base weight of about 75 g/m2 and values HST from about 20 seconds to 220 seconds were coated with the compositions of table 1. The base sheets and their specifications are listed in table 2.

Table 2.
The base paper
The base paperTrade nameLevel sizing
(HST, C)
AndOffice Max MaxBrite20
InXerox Premium Multipurpose 61
Hewlett Packard Multipurpose157
DHewlett Packard Everday Ink Jet218

For applying the coating composition both ends of the sheet of base paper sizes 9×12 inches was attached with tape to the support sheet, the coating composition was applied in a thin line on a paper base, a rod Meier uniformly carried out on the sheet. Controlling the solids content in the composition and size of the rod, having a mass capture of 0.25-1.0 g/m2 on the side. Bases coated and their specifications are shown in table 3.

Table 3
Treated bases
Treated baseTrackThe base paperFloor salt, g/cm
1A1A0,25
1B1B0,25
1C1C 0,25
1D1D0,25
2A2A0,5
2B2B0,5
2C2C0,5
2D2D0,5
3A3A1,0
3B3B1,0
3C3C1,0
4D3D1,0

Example 2

Conducted a series of experiments to assess the suitability of the basics of table 3 for inkjet printing. Properties selected for evaluation were the drying time, the print density and sharpness heaven. For comparison purposes, the same properties were evaluated for the underlying securities A, B, C and D. Use the following order of operations.

A. drying Time ("IT%"):

In the course of this evaluation sample paper created image on a Hewlett-Packard Deskjet 6122, manufactured by Hewlett-Packard black print cartridge (catalog number HP A) in the indoor environment according to TAPPI (23°C and 50% Rel. humidity). The print mode determined by the type of paper and the selected print quality. Used printer settings default - uncoated paper and quick-normal print quality. Used spectrodensitometer X-Rite model 528, aperture 6 mm Setting density measurements were as follows: color - the visual, the status of T and the mode of the absolute density. 5 seconds after printing, the samples were folded in half and rolled rubber hand roller weighing 4.5 kg, the number of HR-100 company Chemlnstruments, Inc., Mentor, Ohio, USA. The samples were opened and gave them to air dry. The density of the samples was measured by a densitometer X-Rite 500 series to determine the density before (ODAbout) and after (ODT) rolling, the blank area is also measured to obtain the value of the background paper (ODB). Then the percentage of Krasnoperekopsk ("IT%") for various securities was calculated by the following equation:

IT%=[(ODT-ODB)/(ODAbout-ODB)]X100.

B. the print Density ("ODAbout ")

When this assessment sample paper created an image using an inkjet printer Hewlett-Packard Deskjet 6122 Hewlett-Packard, using the black cartridge (catalog number HP A), in room conditions according to TAPPI (23°C and 50% Rel. humidity). The print mode determined by the type of paper and the selected print quality. Were selected default settings - uncoated paper and quick-normal print quality. The samples were allowed to air dry. The print density was measured by a spectrodensitometer X-Rite model 528, aperture 6 mm Setting density measurements were as follows: color - the visual, the status of T and the mode of the absolute density.

C. the sharpness of the edges ("EA")

When this assessment sample paper created an image using an inkjet printer Hewlett-Packard Deskjet 6122 Hewlett-Packard, using the black cartridge (catalog number HP A), in room conditions according to TAPPI (23°C and 50% Rel. humidity). The print mode determined by the type of paper and the selected print quality. Were selected default settings - uncoated paper and quick-normal print quality. The samples were allowed to air dry. The sharpness of the edges of the images on the samples was measured using a personal system of image analysis company QEA (company Quality Engineering Associates, Burlington, Massachusetts).

The results of these evaluations are shown in table 4 and figure 1-6.

Table 4Treated base1T%ODAboutEAHST (s)Floor salt,
g/cm1A41,6213,8200,251B201,688,7610,251C591,636,81570,251D581,636,32180,252A31,619,1200,52B181,658,1 610,52C431,647,01570,52D711,625,92180,53A41,618,5201,03B271,646,8611,03C491,626,41571,03D681,595,92181,0

The base paper A11,0629,7200
The base paper B461,3118,6610
The base paper C761,4323,81570
The base paper D871,516,32180

Example 3

(A) Preparation of compositions for size press

A series of coating compositions made according to the following procedure. The coating was prepared in the laboratory using a mixer with low effort cutoff. Some amount of pre-cooked starch was added into the container floor, then added water and then the water-soluble salt of the divalent metal in the respective cutting action. Then the floor was added 0.6 proportion of substances for gluing surface on the basis of styrene. The required amount of TV is rdih particles for this application ranges from 11% to 16% depending on the sensitivity of the system to the viscosity of the coating or composition for size press and the desired level of grip. The composition and specifications of coatings are given in table 5.

Table 5

Compositions for size press

Composition for size pressLeaded starch, sharesCalcium chloride, sharesWater, shares
111089
211188
311287
412385
512484

(C) Preparation of inkjet papers are processed in the sizing press

1. Preparation of the base

Bases used in this experiment was manufactured on a paper machine from a fibrous composition consisting of 60% softwood fibers and 40% eucalyptus and 15% precipitated calcium carbonate with internal glue - alchemista the NYM anhydride (ASA). The base weight was approximately 75 g/m2 and the value of the HST base paper of approximately 20 seconds.

2. Processing in the sizing press

The base paper used in this experiment had a base weight of about 75 g/m2 and the value of HST approximately 20 seconds. For applying the coating composition to the roll paper width of 12 inches was continuously applied between the two shafts, and the coating composition was pumped into the tank of the contact zone, and a paper was submitted through the tank in a zone of contact with a given speed. By controlling the solids content of the composition and speed of passage through the size press got a lot of grip from about 2.2 to 3.0 g/m2.

Basics processed in the sizing press, and their specifications are shown in table 6.

Table 6
Basics processed in the sizing press
Base, processed in the sizing pressA sizing compositionThe coating starch, g/cmFloor salt, g/cm
112,20
222,20,2
332,20,4
442,20,6
552,20,8

Using the procedure of Example 2 was determined values IT%, ODAboutand EA for the basics, processed in a sizing press from table 6. The results of these evaluations are shown in table 7.

Table 7
Base, processed in the sizing pressIT%ODAboutEAHST,Floor salt, g/cm
1701,249,1570
2421,567,747 0,2
328of 1.578,1470,4
4311,607,4580,6
5301,516,9470,8

Example 4

(A) Preparation of compositions for processing in the sizing press

A series of coating compositions was prepared by the following procedure. Ingredients coatings, such as cooked starch, water-soluble salt of the divalent metal, water, various additives in the coating, such as optical brighteners, defoaming additive, cationic polymers, adhesives and cross-linking substance, continuously fed into the tanks size press of the paper machine under stirring. The required levels of solid particles for this application ranged from 5 to 25%, depending on the sensitivity of the system to the floor or the viscosity of the composition for size press. Compositions for size press and specifications are listed in table 8.

Table 8
Compositions for size press
Composition for size pressLeaded starch, sharesCalcium chloride, sharesCationic polymer, sharesWater, shares
180092
282,50to 89.5
362,53,588

(C) Preparation of inkjet papers are processed in the sizing press

1. Getting the basics

Bases used in this experiment were made on a paper machine from a fibrous composition consisting of 60% fiber and 40% eucalyptus, and 15% precipitated calcium carbonate with internal glue - alkenylamine anhydride (ASA). The base weight was approximately 75 g/m2 and a HST value of the underlying securities accounted for approximately 30 seconds until up to 150 seconds.

2. Experiments by car

For applying a sizing composition ingredients were pumped into the tank from stainless steel with a specified flow rate and were dosed out on a paper basis in a sizing press with a metering rod or immersion. By controlling the solids content in the composition and pressure in the contact zone was obtained mass capture approximately 3.0 g/m2.

Basics processed in the sizing press, and their specifications are shown in table 9.

Table 9
Basics processed in the sizing press
Base, processed in the sizing pressA sizing compositionFloor salt, g/cm
110
220,8
320,8
420,8
531,0

And who uses the procedure of Example 2, defined values IT%, ODAboutand EA for the basics, processed in a sizing press of table 9. The results of these evaluations are shown in table 10.

Table 10
Base coatedIT%ODAboutEAHST,Floor salt, g/cm
1711,30the 9.71180
2361,547,21390,8
3271,527,51210,8
4111,538,8480,8
5171,587,0 241,0

In light of the above description of possible changes in the above examples. Therefore, although the invention is described with reference to certain preferred embodiments of it will be clear that can be developed and other compositions, which, however, are included in the scope and essence of the invention defined in the attached claims. The above description of the various preferred embodiments of the present invention serves the purposes of illustration only, and it is understood that the invention may be made of various modifications and changes without departing from the essence or scope of the invention defined in the claims.

1. The sheet to be printed, containing the basis that includes:
fiber lignocellulose and
at least 0.02 g/m2water-soluble salt of the divalent metal caused by a size press,
and relevant test sizing Hercules (“HST”) basis from about 3 seconds to 300 seconds, and where the value of the HST and the amount of the salt of divalent metal chosen so that the sheet for printing had a percentage of Krasnoperekopsk (“IT%”), equal to or less than about 60.

2. The sheet for printing according to claim 1, characterized in that the said salt is in contact with at least one surface referred to the framework.

3. The sheet for printing according to claim 1, characterized in that the said fiber lignocellulose are a mixture of hardwood fibers and softwood fibers.

4. The sheet for printing according to claim 1, characterized in that the said paper base has a Gurley porosity of approximately 5 sec/100 ml to 75/100 ml

5. The sheet for printing according to claim 1, characterized in that the said paper base has a pore diameter of approximately from 2.0 to 3.5.

6. The sheet for printing according to claim 1, characterized in that the mentioned value of HST is approximately from 5 seconds to 200 seconds.

7. The sheet for printing according to claim 1, characterized in that the mentioned value of HST is approximately from 10 seconds to 100 seconds.

8. The sheet for printing according to claim 1, having a percentage of Krasnoperekopsk (“IT%”), equal to or less than approximately 50.

9. The sheet for printing of claim 8, characterized in that the percentage of Krasnoperekopsk (“IT%”) equal to or less than approximately 40.

10. The sheet for printing according to claim 9, characterized in that the percentage of Krasnoperekopsk (“IT%”) equal to or less than about 30.

11. The sheet for printing of claim 10, wherein the percentage of Krasnoperekopsk (“IT%”) equal to or less than approximately 20.

12. The sheet for printing according to claim 1, having the sharpness of the edges of the image (“EA”) is less than about 15.

13. The sheet for printing on item 12, characterized in that the sharpness of the edges of the image (“EA”) is less than about 12.

14. Little print-on item 13, characterized in that the sharpness of the edges of the image (“EA”) is less than about 10.

15. The sheet for printing on 14, characterized in that the sharpness of the edges of the image (“EA”) is less than about 8.

16. The sheet for printing according to claim 2, characterized in that the water-soluble salt of the divalent metal salt is calcium or magnesium.

17. The sheet for printing on item 16, characterized in that the water-soluble salt of the divalent metal salt is calcium.

18. The sheet for printing on 17, wherein the water-soluble salt of the divalent metal is calcium chloride.

19. The sheet for printing according to claim 2, having an optical density of pigment black (“ODO”), equal to or greater than 1,30.

20. The sheet for printing according to claim 19, characterized in that the optical density of the black pigment (“ODO”) equal to or greater than 1,40.

21. The sheet for printing according to claim 19, characterized in that the optical density of the black pigment (“ODO”) equal to or greater than 1,50.

22. The sheet for printing according to claim 19, characterized in that the optical density of the black pigment (“ODO”) equal to or greater than 1,60.

23. The sheet for printing according to claim 2, having on a substrate a mixture of one or more water-soluble salts of divalent metals and at least one of the one or more starches, one or more additives, polymer emulsions, and one and several nitrogen-containing compounds, or combinations thereof.

24. The sheet for printing on item 23, characterized in that the said one or more starches include hydrocarbons synthesized in the tapioca.

25. The method of forming sheet for printing according to claim 1, which includes:
(a) applying a liquid sizing composition containing a volatile liquid having dissolved or dispergirovannoyj one or more water-soluble salts of divalent metals on the surface of the base containing fiber lignocellulose, by means of a size press for the formation of wet-processed substrate with the said salts in contact with the said surface, characterized in that the value of the test sizing Hercules (“HST”) basis and the amount of the salt of divalent metal chosen so that the sheet for printing had a percentage of Krasnoperekopsk (“IT%”), equal to or less than about 60; and
(b) drying said surface mentioned wet processed the basis for the formation of this sheet for printing.

26. The way to create images in the printing device, which includes:
(a) introduction in the above-mentioned device of the sheet to be printed, containing base, which contains fiber lignocellulose and water-soluble salt of the divalent metal caused by a size press in which the value of the test sizing Hercules (“HST”) basis and the amount of salt is muhametovo metal selected to the sheet for printing had a percentage of Krasnoperekopsk (“IT%”), equal to or less than about 60; and
(b) forming the image on at least one surface of the above-mentioned sheet for printing.

27. The method according to p, characterized in that the said printing device is an inkjet printer, and the above-mentioned image is formed by ejection of ink from the said device to the surface of the sheet for printing.



 

Same patents:

FIELD: printing.

SUBSTANCE: invention relates to recording sheets used in printing processes. The recording sheet comprises a substrate of the web of cellulosic fibres and the sizing composition. The sizing composition comprises a binder and a divalent metal salt. The said salt in a concentration of at least 51% of the total concentration and not less than 2500 parts per million is located at a distance within 25% of the total substrate thickness from at least one surface of the said substrate. At that the recording sheet has Qtotal as a measure of the amount of the sizing agent in the transition from the outer edges towards the middle of the sheet in cross-section of less than 0.5. Also a method of production of the recording sheet is described.

EFFECT: said substrate and the sizing agent interact with formation of the I-shaped structure of the recording sheet which provides an optical density of black printing of at least 1,15.

20 cl, 15 dwg, 2 tbl, 10 ex

FIELD: printing.

SUBSTANCE: invention relates to a method of manufacturing a security or valuable document, which includes the following steps: B) multilayer material is produced, which comprises a paper substrate, a masking layer provided on the paper substrate in the masking area, and marking substance modified by laser radiation, provided in the marked area, at that the marked area covers the masking area, and L) the multilayer material in the marked area is subjected to laser action in order to create the negative signs in the masking area simultaneously in register and discolored signs on unmasked areas of the marked area. At that before performing the step L) on the masking layer at least in the marked area the recesses are made in the form of patterns, signs or a code.

EFFECT: invention provides a high degree of protection against forgery.

25 cl, 22 dwg

FIELD: printing.

SUBSTANCE: invention relates to the field of advertising, printing and photography, and is intended to produce high-strength images on metal products, in particular, on the surface of titanium products, and can be used in various fields of industry, arts and crafts. The method includes obtaining an image on the intermediate base, the image transfer on the surface of the product, high temperature burning of the product with the printed image in the oven. As the product for transferring image the titanium sheet is used. Before applying image the titanium sheet is subjected to high temperature burning at a temperature of 890-1020°C to form on its surface of a layer of the titanium oxide uniform in thickness, exposed by this temperature for 15-90 minutes. The burning temperature is selected depending on the desired shade of coloring of the oxide layer, and the exposure time - depending on its desired thickness, the image transfer is carried out on the surface of the obtained titanium oxide layer, and a high temperature burning of the product with the applied image is carried out at a temperature of 550±15°C.

EFFECT: increasing longevity of the images obtained, simplification and reduction of cost of the technologic process of their preparation, as well as the high artistic quality of the image to produce its various shades.

8 cl

FIELD: textiles, paper.

SUBSTANCE: composition comprises a mixture of one of the two porous stable aggregates and precipitated calcium carbonate (PCC) called grade B OCC or grade C OCC, in combination with the second OCC of non-equal-faced type (OCCNT) - the pigment of fine grinding. The ratio of grade B OCC or grade C OCC and OCC of non-equal-faced type OCCNT is selected in the range from 90/10% to 10/90% by dry weight. The content of dry weight of pigments is selected in the range from 0.3% to 5.0% by dry weight of the finished paper product. Depending on the granulometry of two OCC of fine grinding the said mixture may contain a pigment and/or filler of coarser grinding. The main criterion of selection of the pigment of "coarser grinding" is that it should have a granulometry which does not have influence on the significant deviation in the number of particles smaller than 0.2 microns, preferably less than 0.3 microns, more preferably less than 0.5 micron, the most preferably less than 1 micron.

EFFECT: composition enables to eliminate the print-through through the layer of light thin paper such as newsprint and to improve the technical properties of the paper sheet.

24 cl, 4 dwg, 1 tbl, 8 ex

FIELD: process engineering.

SUBSTANCE: invention relates to marking of products and goods in various industries. Proposed method consists in application of hidden thread for marking of the product by applying it on the product or its package. Note here that hidden white and hidden black threads are used to be twisted at a time in various combinations with common threads of cotton, flax, silk, synthetic fibers to be sensed by touch.

EFFECT: simple marking, possibility of tactile sensation.

2 cl, 5 dwg

FIELD: printing industry.

SUBSTANCE: proposed invention is designed for protection against counterfeit of packages and other items. Cryptography on the colourless transparent polymer film with the possibility of multiple positive-negative reading of information by means of application of information symbols onto the film with the help of local thermal impact and observation at different angle or in a clear space. Application of information is carried out through usage as a polymer film of unixially oriented rigid elastic polyolefin film, local thermal impact under pressure with subsequent deformation of elastic stretching along the axis of orientation.

EFFECT: proposed invention simplifies production of invisible images on a carrier with provision of high extent of counterfeit protection.

3 cl, 3 dwg, 4 tbl, 6 ex

FIELD: metallurgy.

SUBSTANCE: composition for marking of metal products produced by powder metallurgy method includes not more than 50% of wt % of luminophor and 50 wt % and more of binding-lubricating agent being fatty acid derivatives or powders of synthetic wax and/or paraffin. Marking of metal products by this composition consists in mixing of alloy metal powder with marking composition, which consists of at least one inorganic agent with property to provide luminescence at irradiation and binding-lubricating agent with subsequent pressing of obtained mixture and its sintering at temperature not exceeding 900°C.

EFFECT: possibility of products marking during their production by powder metallurgy method, simplifying marking technology and providing safety.

15 cl, 1 dwg, 8 ex

Recording medium // 2492058

FIELD: printing.

SUBSTANCE: invention relates to a recording medium. The recording medium comprises a substrate and a layer that receives ink deposited on the substrate, in which the arithmetic mean roughness Ra of the outer surface of the recording medium as specified in JIS B 0601:2001, is 1.1 mcm or more and 2.5 mcm or less, and the asymmetry Rsk of the roughness curve of the outer surface of the recording medium as specified in JIS B 0601:2001, is 0.1 or less.

EFFECT: invention provides creation of a recording medium capable of suppression of occurrence of ink acceptance, reduction of visibility of scratches on the outermost surface of the recording medium, and suppression of occurrence of the speckled structure on the image during recording.

7 cl, 12 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention can be used to produce a pigment suitable in making paper for ink-jet printing. Precipitated calcium carbonate is obtained by mixing quicklime with water in a reactor or a tank with a mixer, followed by filtration of the calcium hydroxide suspension to remove all residual contaminants and/or non-reactive quicklime. The filtered suspension is then fed into a stainless steel reactor fitted with a mixer. Temperature is kept in the range of 10-70°C, after which the suspension is fed into a carbonisation reactor, where a carbon dioxide-containing gas is bubbled through the suspension. The carbonisation step is carried out at carbonisation gas flow rate of less than 30 litres per minute per kilogram of calcium hydroxide during precipitation under normal conditions. The suspension is removed from the tank when conductivity reaches the minimum level and pH drops below 8, wherein large particles are removed through a filter. The obtained calcium carbonate can be used as a pigment.

EFFECT: invention improves the quality of ink-jet printing while reducing the cost of production of paper for ink-jet printing.

15 cl, 5 dwg, 17 tbl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention relates to jet printing inks, particularly non-aqueous inks for jet printing. The ink for jet printing contains a pigment, binder, polyetheramide resin as a pigment dispersant, an organic solvent and an anti-corrosion agent from an imidazole group or a group of volatile anti-corrosion agents, preferably dicyclohexylamine or cyclohexylammonium cyclohexylcarbamate.

EFFECT: disclosed inks have high dispersion stability and prevent corrosion of print heads of jet printers and nozzle clogging.

8 cl, 8 tbl, 34 ex

FIELD: paper-and-pulp industry.

SUBSTANCE: when ground paper is manufactured, it is coated with ink-accepting coating. The latter contains latex binder, water-soluble binder, pigment mixture of amorphous silica with colloidal cationic silica and colloidal alumina, and ink-fixing agent. Coating operation is performed in two steps, weight ratio of coating applied in the first step to that in the second step ranging from 0.34:1 to 0.66:1. Reverse face of base paper is coated by detwisting coating. Further, coating is ennobled via superglazing at pressure in supercalender roll gap 30-75 bar.

EFFECT: improved workability of process and improved quality of paper due to increased surface strength.

4 cl, 7 ex

FIELD: polygraphy.

SUBSTANCE: one invention from a group is related to printing base, being a substrate with oleophilic surface, having Gurley-Hill porosity value greater than 5000s/100ml, while printing paint, imprinted on such base, has offset value of printing paint IGT with delay time 30s, equal to more than 0,60 printing density units. Another invention is related to printing method, which is performed in at least one printing section with use of substrate, having oleophilic surface and being not porous with Gurley-Hill porosity value over 5000s/100ml, and carrier of pigment of printing paint, having value of offset of printing paint IGT with delay time 30s, equal to more than 0,60 printing density units.

EFFECT: improved quality of printing, improved quality of folding, decreased static electricity.

2 cl, 6 dwg, 3 tbl

FIELD: pulp-and-paper industry.

SUBSTANCE: coating composition consisting of ink-compatible pigment, water-soluble binder, and cationic fixative is deposited onto one of the sides of based paper and the other side is covered with detwisting coating, after which glossy surface is formed. Coating composition is supplemented by wettability controlling agent based on polydimethylsiloxane resins in amounts 0.4 to 1.6% of the weight of pigment. Water-soluble binder is a mixture of polyvinyl alcohol with polyvinylpyrrolidone at ratio (90-50):(10-50) in amount 40-60% and styreneacrylic latex in amount 15-20% of the weight of pigment. When forming glossy surface, polyethylene oxide-based plasticizer is used in amount 7-15% of the weight of pigment followed by supercalendering at pressure in roll contact zone 20-25°C and temperature 50-90°C.

EFFECT: improved manufacturability of process.

5 cl, 1 tbl, 54 ex

FIELD: pulp-and-paper industry.

SUBSTANCE: coating composition consisting of ink-compatible pigment, binder, and cationic fixative is deposited onto one of the sides of based paper and the other side is covered with detwisting coating, after which coating is ennobled by means of supercalendering. As pigment, mixture of amorphous silicon dioxide with calcium carbonate or kaolin with outer specific surface 60-85 m2/g at ratio (25-50):(75-50). Binder is a mixture of polyvinyl alcohol with latex selected from class of styreneacrylic copolymers at ratio (20-25%):(7-18%) based on the weight of pigment. Cationic fixative is poly(diallyldimethylammonium chloride), which is directly incorporated into coating composition in amount 5-10%.

EFFECT: enabled image quality and paper surface strength control.

3 cl, 1 tbl, 13 ex

FIELD: method and device for colored flexography.

SUBSTANCE: method for applying multiple paint layers onto a substrate includes following stages: application onto a substrate of at least one painting layer of energy-hardened liquid paint with viscosity less than approximately 4000 centipoises, and including reaction-incapable paint thinner, where applied layer of energy-hardened paint has first viscosity; evaporation of at least a part of reaction-incapable paint thinner from applied paint layer for increasing viscosity of applied layer of energy-hardened paint; application onto substrate and applied layer of energy-hardened paint with increased viscosity of at least one layer of non energy-hardened liquid paint, viscosity of which is less than increased viscosity of previously applied layer of energy-hardened paint; and drying of both paint layers on the substrate. Another variant of method for applying multiple paint layers onto a substrate is differentiated by applied layer of energy-hardened paint having to be of increased viscosity compared to following layer of energy-hardened liquid paint with viscosity less than approximately 4000 centipoises, and containing reaction-incapable paint thinner, where viscosity of following layer is less than increased viscosity of energy-hardened paint layer applied beforehand. Also a method is suggested for printing multiple paint layers on a substrate, which includes stage of selection of first and second energy-hardened liquid flexography paint, where each paint contains viscosity controlling reaction-incapable paint thinner, consisting of water in amount of from 5% to 50% of thinner weight, where each paint has viscosity approximately ranging from 30 to 70 centipoises, and stage of serial application of first and second energy-hardened liquid flexography paint onto a substrate to create first and second paint layers, having overlapping parts, where second paint is applied only after at least a part of paint thinner is evaporated in first paint layer. Device for serial application of multiple overlapping paint layers onto a substrate contains substrate route and substrate drive for moving the substrate along a route, where paint application sections are adapted for applying paint onto substrate, which paint includes reaction-incapable paint thinner and has viscosity less than 4000 centipoises, and also management system, which manages transportation of substrate along a route. Viscosity of first layer of liquid paint, applied onto a substrate in one of paint sections, is increased due to evaporation of at least a part of paint thinner from first paint layer to higher viscosity compared to viscosity of second paint, applied on top of first paint layer in next paint section, located at a certain distance from first paint section, up to viscosity, sufficient for "crude" application of second liquid paint layer during transportation of substrate between paint sections.

EFFECT: in suggested methods, relief printing is achieved without insignificant modifications of printing equipment.

4 cl, 2 dwg

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: 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: 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: 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

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