Protective printing liquid and a method of printing with nanoparticles

FIELD: printing engineering.

SUBSTANCE: invention, in particular, relates to a method of printing allowing protection of printing materials against counterfeit reprints, for instance in fabrication of banknotes, shares, checks, and other valuable paper documents. Invention provides printing liquid for printing through narrow nozzles onto objects, in particular when fabricating banknotes, shares, and checks, which liquid comprises carrying medium and nanoparticles of metal salts in the form of crystalline solid particles having average diameter less than 300 nm, which fluorescent and phosphorescent when excited by UV emission of the A, B, or C band, or visual light, while emitted fluorescent and phosphorescent waves do not lie in the visual light frequency region and excitation frequency region and emission frequency region are shifted in frequency scale. Nanoparticles contain enhancing additives of at least one type having excitation and emission frequency ranges corresponding to fluorescence and phosphorescence. Provided is also printing method including injecting of above-described liquid(s) through one or several narrow nozzles, which are regulated individually or by groups in relation to availability or lack of printing liquid and in relation to duration or intensity of flowing of printing liquid. Printing method is either piezoelectric method or jet printing one. Employment of proposed liquid for ink-pots and object marking, in particular when fabricating banknotes, shares, and checks involving printing equipment provided with one or several narrow nozzles is also described.

EFFECT: increased reliability of protection.

15 cl, 2 dwg

 

The invention relates to a method of printing in which the printing process of the printing liquid is ejected through one or more narrow nozzles, or to print liquid suitable for this method. When the hole diameter of the nozzle is set to several micrometers. The invention relates in particular to the problem of security printing from fakes.

In many areas of great interest to protect printed materials from fake reprints. This is especially true in the manufacture of banknotes, shares, cheques and other valuable papers or identity cards or other identity documents. But also to confirm the authenticity of the product characteristics, such as CD-ROMs, computer chips or drugs, are increasingly used for imprinting, which increase the security against forgery.

The known method of protection against fraud is the use of graphic security features, which, thanks to his stealth or the microstructure indistinguishable to the naked eye. Thus, the method disclosed in the patent application DE 19754776 A1, can radicalists very small structures with particularly thin lines with a width of up to 5 microns.

Also in the method described in patent DE 19900856C2, printed visible image further includes the I secondary information, which cannot be seen by the naked eye, such as changing the shape, density, position, or point size of the image.

However, this method has the disadvantage, as protection against forgery is only to complicate things with the help of especially small and, if possible hidden structures in printed material the possibility of their distinctiveness and play. The acquisition or production of the required special printers, especially with high resolution, and means for their management represents a significant technical and financial costs. And yet, simple means optical zoom, such as a magnifying glass, this secondary information can be easily found, and with the help of modern printers with high resolution can be manufactured fake duplicates.

Further in the prior art known methods of printing and, accordingly, the printing fluid for which protection against forgery can be enhanced by the use of organic dyes, which fluoresce when excited. However, this method of printing or printing fluid have the disadvantage that organic dyes have broadband spectra of both absorption and emission. A clear distinction between absorbed and emitted radiation frequencies, necessary for precise identification is impossible. Therefore, these methods and, accordingly, the printing fluid is insufficient to protect against forgery.

For printing through a narrow nozzle also not suitable known methods of printing or printing of a liquid in which the printing fluid contains particles, fluorescent upon excitation, the size of the order of several microns, as when using a narrow nozzle, the diameter of which may be not more than 5 μm, there is a high probability that they will quickly become clogged with particulate matter.

Thus, the present invention is the creation of a protective printed liquid suitable for spraying from one or more narrow nozzles and having improved from the point of view of the press, protection against forgery.

This problem is solved by the features of independent claims. The printing liquid according to the invention contains nanoparticles capable when excited to fluoresce or phosphoresce, which, essentially, are particles with a diameter from 1 to 1000 nanometers and have a crystalline structure. When such small particles is no danger of clogging the narrow nozzles used in the printing process, especially when the average particle diameter of less than 300 nanometers. The use of the printing fluids with nanoparticles is a simple way to improve the security print the materials from the fakes, in particular, because such crystalline solid particles which are able to fluoresce or phosphoresce upon excitation, there is a clear distinction as absorbing and emitting radiation frequencies sufficient to detect forgeries. Preferably, the nanoparticles can exist, depending on the intended application, ultraviolet radiation range (320-400 nm), B (280-320 nm) or C (200-280 nm) or visible light.

The present invention is directed to improving the reliability of protection products by labelling objects, in particular containing nanoparticles printed liquid for inkjet printing.

In dependent clauses are given preferential modifications and improvements of the respective objects of the invention.

With the ability to apply nanoparticles inkjet printer, new opportunities arise protection products. In order to provide sufficient protection against potential fraud, we must use the fact that when you print on an inkjet printer we are talking about dot print. The visible eye lines consist of a series of points. This method of imaging, which is not used in other methods of printing. If now the ink with nanoparticles to be used in process color printing, to simulate the resulting dot patterns will become increasingly difficult. Thus, it is possible to make the image point consisted of three different individual points, one of which is the point, specially marked nanoparticles.

The use of this method should preferably be simple and not associated with large hardware cost.

If such protective print in color printing is used, for example, a colorless ink containing nanoparticles of lanthanum phosphate, subsidized by cerium and terbium (LaPO4:Ce, Tb), and two ink of a different color, as is currently standard electronic printers, you can type in printing protective sign, which is visible only under UV-C lamp (255 nm)and under UV-B lamp (366 nm) will be invisible.

This means that such printed material cannot be simulated with the use of organic dyes as organic fluorescent colors glow from both light sources. Forgery using a particulate organic or inorganic, in this case also prevented, since the microparticles may not be applied by an inkjet method, or more generally, any method of printing, in which printing ink is extruded through a narrow nozzle. Other methods of printing it is not possible to simulate the sample points obtained from an inkjet printer. When using the known piezoelectric method can be formed even special printed patterns, depending on the design of the printhead.

Thus, the reliability of marking is provided by the size and physical properties of nanoparticles and their use in ink when printing on an inkjet printer.

The present invention is also suitable, in particular, to introduce a fluorescent or phosphorescent nanoparticles in suitable for printing liquid as the carrier medium, then the resulting mix well, and thus to perform the method of printing according to the prior art in modified according to the invention form, or even more to improve, from the point of view of obtaining printed protective markings, the method of printing as described above.

This can be used, in particular, these nanoparticles, the synthesis of which is disclosed in the concurrently pending patent application PCT DE 0103433.

Basically, the nanoparticles are nanoparticles of metal salts with lattice or lattice of the seed, the cation of which can be obtained from a source of cations and anions from a class of substances that serve as a source of anions, and the material of the seed or the lattice can, in particular, contain compounds from the group of phosphates, halophosphates, Arsenates, sulfates, borates, aluminates, gallates, silicates, germanates, oxides, vanadates, niobates, tantalates, wolframates, molybdates, halides y is lacnych metals, other halides, nitrides, sulfides, selenides, sulfoselenides, and oxysulfide. If necessary, one or more of the available deruosi additives in this case can be specifically selected so that could be realized is desirable from the viewpoint of the absorption and emission properties.

As the carrier medium for the printing liquid according to this invention shall be selected a number of different compounds. Suitable carrier medium is, in particular, water, miscible with water, solvents such as alcohols, for example methanol, ethanol, isopropanol, butanol, etc., alkalmazasa ethers, glycols, diols, such as 1,4-butandiol, ketones, for example acetone, and is not completely miscible with water, solvents, for example aliphatic and aromatic hydrocarbons, optionally halogen, for example hexane, cyclohexane, methylethylketon, acetonitrile, dichloromethane, etc. and some mixtures of the foregoing. The most acceptable carrier medium is an aqueous carrier medium, i.e. pure water or water-containing mixture with the solvent. The ratio of water to mix with water, the solvent is not limited, but usually the carrier medium contains more than 50% water.

In principle, the method according to the invention can be applied in the form, to the Yes nanoparticles added to one or more colored liquids naturally also to achieve "simple" special effects fluorescence. Such effects should be understood mainly such effects are due to detected easily emission fluorescence after excitation ordinary and easy to get, essentially, the visible light with a broad spectrum or UV range A. the glow Effect should in this case be implemented easily and without additional technical AIDS. For this approach, in addition, these nanoparticles, which primarily contain phosphorus or fluorine without appropriate protective potiroosi additives.

The aspect of the protection method of printing in accordance with the present invention is achieved, essentially, by the fact that add one or more potiroosi additives, i.e. make inside the seed material of the nanoparticles, and at least one of the additives after appropriate excitation, for example, UV radiation range creates emissions, which can then be detected. This principle is also based on the energy absorption of certain wavelengths and emission of certain wavelengths of the detected radiation.

The crystal lattice or, in the case potiroosi additives, bare lattice may contain in General form these connections type is XY, and X is a cation of one or more elements of the main groups 1A, 2A, 3A, 4A, sub-groups 2b, 3b, 4b, 5b, 6b, 7b of the periodic system of the elements or the lanthanides (rare earth group of elements), a Y is or polyatomic anion of one or more elements of main groups 3A, 4A, 5A, sub-groups 3b, 4b, 5b, 6b, 7b, and/or 8b, as well as main group elements 6A and/or 7, or a monatomic anion of the main group 5A, 6A or 7a of the periodic system.

These include, in particular: phosphates, halophosphates, arsenate, sulfates, borates, aluminates, gallaty, silicates, germanate, oxides, vanadates, niobates, tantalate, wolframate, molybdates, halides of alkali metals, other halides, nitrides, sulfides, selenides, sulfoselenides or oxysulfide.

As potiroosi supplements may apply one or more elements from among the elements of the main groups 1A, 2A or Al, Cr, Tl, Mn, Ag, Cu, As, Nb, Ni, Ti, In, Sb, Ga, Si, Pb, Bi, Zn, Co and/or elements of the group of lanthanides.

In addition, labeling can be applied to the nanoparticles with the following connections. The colon is specified datiruemye substances:

LiI:Eu; NaI:Tl; CsI:Tl; CsI:Na; LiF:Mg; LiF:Mg, Ti; LiF:Mg, Na; KMgF3:Mn; Al2O3:Eu; BaFCl:Eu; BaFCl:Sm; BaFBr:Eu; BaFCl0,5Br0,5:Sm; BaY2F8:A (A=Pr, Tm, Er, Ce); BaSi2O5:Pb; BaMg2Al16O27:Eu; BaMgAl14O23:Eu; BaMgAl10O17:Eu; (Ba, Mg)Al2O 4:Eu; Ba2P2O7:Ti; (Ba, Zn, Mg)3Si2O7:Pb, Ce(Mg, Ba)Al11O19; Ceof 0.65Tb0,35MgAl11O19; MgAl11O19:Ce, Tb; MgF2:Mn; MgS:Eu; MgS:Ce; MgS:Sm; MgS(Sm, Ce); (Mg, Ca)S:Eu; MgSiO3:Mn; 3,5MgO·0,5MgF2·GeO2:Mn; MgWO4:Sm; MgWO4:Pb; 6MgO·As2O5:Mn; (Zn, Mg)F2:Mn; (Zn, Be)SO4:Mn; Zn2SiO4:Mn; Zn2SiO4:Mn, As; ZnO:Zn; ZnO:Zn, Si, Ga, Zn3(PO4)2:Mn; ZnS:A (A=Ag, Al, Cu); (Zn, Cd)S:A (A=Cu, Al, Ag, Ni); CdBO4:Mn; CaF2:Mn; CaF2:Dy; CaS:A (A=lanthanides, Bi); (Ca, Sr)S:Bi; CaWO4:Pb; CaWO4:Sm; CaSO4:A (A=Mn, lanthanides); s3(PO4)2·Ca (F, Cl)2:Sb, Mn; CaSiO3:Mn, Pb; Ca2Al2Si2O7:Ce; (Ca, Mg)SiO3:Ce; (Ca, Mg)SiO3:Ti; 2SrO·6 (2O3)·SrF2:Eu; 3Sr3(PO4)2·CaCl2:Eu; And3(PO4)2·ACl2:Eu (A=Sr, Ca, Ba); (Sr, Mg)2P2O7:Eu; (Sr, Mg)3(PO4)2:Sn; SrS:Ce, SrS:Sm, Ce, SrS:Sm; SrS:Eu; SrS:Eu, Sm; SrS:Cu, Ag; Sr2P2O7:Sn; Sr2P2O7:Eu; Sr4Al14O25:Eu; SrGa2S4:A (A=lanthanides, Pb); SrGa2S4:Pb; Sr3Gd2Si6O18:Pb, Mn; YF3:Yb, Er; YF3:Ln (Ln=lanthanides); YLiF4:Ln (Ln=lanthanides); Y3Al5012:Ln (Ln=lanthanides); YAl3(BO4)3:Nd, Yb; (Y, Ga)BO3:Eu; (Y, Gd)IN3:Eu; Y2Al3Ga2O2 :Tb; Y2SiO5:Ln (Ln=lanthanides); Y2O3:Ln (Ln=lanthanides); Y2O2S:Ln (Ln=lanthanides); YVO4:A (A=lanthanides, In); Y(P, V)O4:Eu; YTaO4:Nb; YAlO3:A (A=Pr, Tm, Er, Ce); YOCl:Yb, Er; LnPO4:Ce, Tb (Ln=lanthanides or mixtures of lanthanides); LnVO4:Eu; GdVO4:Eu; Gd2O2S:Tb; GdMgB5O10:Ce, Tb; LaOBrTb; La2O2S:Tb; LaF3:Nd, Ce; BaYb2F8:Eu; NaYF4:Yb, Er; NaGdF4:Yb, Er; NaLaF4:Yb, Er; LaF3:Yb, Er, Tm; BaYF5:Yb, Er; Ga2O3:Dy; GaN:A (A=Pr, Eu, Er, Tm); Bi4Ge3O12; LiNbO3:Nd, Yb; LiNbO3:Er; LiCaAlF6:Ce; LiSrAlF6:Ce; LiLuF4:A (A=Pr, Tm, Er, Ce); GD3Ga5O12:Tb; GD3Ga5O12:Eu; Li2B4O7:Mn, SiOx:Er, Al (0<x<2).

In a preferred method, the nanoparticles can be used according to the invention with the following compounds, as they are known, are well suited for fluorescence:

YVO4:Eu; YVO4:Sm; YVO4:Dy; LaPO4:Eu; LaPO4:Ce; LaPO4:Ce, Tb; ZnS:Tb; ZnS:TbF3; ZnS:Eu; ZnS:EuF3; Y2O3:Eu; Y2O2S:Eu; Y2SiO5:Eu; SiO2:Dy; SiO2:Al; Y2O3:Tb; CdS:Mn; ZnSr:Tb; ZnS:Ag; ZnS:Cu; Ca3(PO4)2:Eu2+; CA3(PO4)2:Eu2+, Mn2+; Sr2SiO4: Eu2+; or BaAl2O4:Eu2+.

Or more of the following: MgF2:Mn; ZnS:Mn; ZnS:Ag; ZnS:Cu; CaSiO3:A; CaS:(A; aO:A; ZnS:A; Y2O3:And or MgF2:A (A=lanthanides).

As datiruemye supplements can according to the preferred versions contained two elements in predetermined ratios to one another, and one DataReady component has one local maximum of the absorption spectrum of light, in particular UV radiation, and the other DataReady component has such a range of fluorescent emission, which has at least one local maximum, distance Δλ/λ which the maximum absorption of the first dominuyushego element is at least 4%. The above phosphate of lanthanum determime additives from cerium and terbium is one example of this, one additive acts as an energy absorber, in particular the absorber of UV radiation, and the other as the emitter of fluorescent light.

The complexity of the authentication and thus increased protection against forgery is achieved using motirola additives, which emits only when she is excited definite narrowband radiation. Additionally, the issue may also become apparent only when the use of technical AIDS, such as UV emission or IR emission.

Assume that the method of printing according to the invention can be carried out also by the fact that nanocat the Itza add to one or more, or all of the used printing inks. In the case of three-color printing can also, for example, to provide the red color component corresponding fluorescent additives nanoparticles. The higher volume fraction of fluorescent nanoparticles, the more intense the fluorescence and the easier it is to register emission light.

Or point of the image could be made from three separate points of different colors, it usually happens when the raster color printing, and from a larger number, for example four, five or more.

In further preferred embodiments, for obtaining markings high degree of protection may apply special printheads that have a secret layout of pixels. While the layout is, for example, an area of 40×40 points. To further increase the security against forgery, he may, for example, be repeated or purposefully changed on a given code or secret rule.

Another modification of the method of printing according to the invention, in which the spraying of the printing liquid(s) occurs through narrow nozzles, is the ability to configure a separate nozzles or multiple narrow nozzle on the duration or intensity of the expiration of the printing fluid. For example, an increase in electrical voltage to separate reguliruemomu nozzle piezoelectric printhead, you can increase the expiration of ink. As a consequence, the corresponding picture element may be in secret sample ordering become fatter, which provides a further opportunity to change a security marking and thereby increases the protection against counterfeiting.

Depending on the selected strategy for the application of security features to protect the product may also be elected to the way in which some of the above measures to ensure the protection can be combined, so that it is possible to selectively use the effects available to the individual characteristics.

Examples of execution of the invention shown in the drawings and explained in detail in the following description.

Figure 1 - schematic representation of two examples of rows of pixels in the image that is printed on the embodiment of the method according to the invention, and

Figure 2 is a schematic depiction of an example of a secret pattern of ordering, which is printed according to another embodiment of the method according to the invention.

In the figures the same symbols refer to identical or functionally identical components.

Figure 1 schematically shows one example, which should only be understood as a diagram, which shows in the form of segments: left, line, pointing diagonally up and to the right, running vertically line. Shown in full point 10 or 12 (left) the first is about a third, right from the first to the fourth) should be applied from the respective ink-pots, comes with a printed liquid enriched fluorescent nanoparticles, optionally secret. These nanoparticles are small crystalline particles, which are either themselves or with the help potiroosi additives fluoresce when excited or phosphorescent. Individual points 10, 12 can be printed by the printing liquid containing nanoparticles coming from a special tank. Due to their small size, from 1 to 1000 nanometers, preferably in the region of a diameter of 300 nanometers or less depending on the diameter of the nozzle is no danger of clogging is very narrow nozzles for inkjet printing.

One example for a secret map layout image elements special printhead, such as printhead piezoelectric method, shown in figure 2. The layout is ordering covers in this example, the region 40×40 points. He may, for example, on a given code or a specific rule to be repeated or purposefully modified to further increase the security against forgery.

Each individual item layout ordering must match the 3rd or 4th point of the image, as shown in figure 1. The sample can optionally then be repeated many times in the print head.

Ka instances for complicated forgery marking can be called the print head, suitable for printing liquids containing nanoparticles, for example, piezoelectric printing method, or a method of inkjet printing, based on the principle of thermal bubble jet, which are secret, trudnootdelyaemoy and hard to identify the layout of the pixels, or goturulduyu additive to a component of a printing ink are chosen so that the corresponding nanoparticles could be synthesized only in the complicated conditions.

As an example easy recognizability, then there is the possibility of validating the authenticity of the marking should mention the following:

the emission of the nanoparticles is easily recognizable also by non-specialists, such as cashier in the case of banknotes. This helps to ensure that banknotes and other printable securities have become more secure from counterfeiting, and depending on potiroosi additives recognizing fakes is relatively simple means.

The following is an example of the printing fluid and its use.

Example

The composition of the printing fluid:

Nanoparticles (YVO4:Eu) about 2 grams

Diethylene glycol 40 ml

Water 38 ml

Ethanol 10 ml

2-pyrrolidon 7 ml

1,4-butandiol 5 ml

Nanoparticles with stirring pre-dispersibility in water and then mixed with diethylene glycol, ethanol, 2-pyrrolidone and 1,butadion. Ready printed liquid before filling in the capacity to print was passed through a PTFE filter (0.22 μm).

For applying the printing liquid on the paper used inkjet printers HP photosmart 7345, Canon 440i, and the printer piezography company Xaar (Gb). Were obtained acceptable results, with virtually no observed clogging of nozzles of printheads of the printer.

Although the present invention has been described above by means of one preferred example of execution, it is not limited to, on the contrary, it can be modified in various ways.

Finally, the features of dependent claims can be freely combined with each other and not only in the order that exists in points, because they are independent from each other.

1. The printing fluid for flow through a narrow nozzle on the subject, in particular, in the manufacture of banknotes, shares, cheques, characterized in that it contains a carrier medium and nanoparticles of metal salts in the form of a crystalline solid particles with an average diameter of less than 300 nm, fluorescencebased or phosphorescent when excited.

2. The printing liquid according to claim 1, characterized in that the nanoparticles are able to fluoresce or phosphoresce when excited by UV radiation range a, b or C or visible light.

3. Printed W is dcost according to one of claim 1 or 2, characterized in that the emitted radiation fluorescence or phosphorescence does not lie in the frequency range of visible light.

4. The printing liquid according to claim 1, characterized in that the nanoparticles contain datiruemye additive is at least one species with a frequency of excitation and the frequency range of excitation for fluorescence or phosphorescence.

5. Printing fluid to claim 1, characterized in that the frequency range of excitation and the frequency range of emission shifted in frequency.

6. The printing liquid according to one of claim 4 or 5, characterized in that it contains at least one type potiroosi additives from the group of the lanthanides of the periodic system of elements.

7. The method of printing includes the operation of feed of the printing liquid according to one of claims 1 to 6 through one or more narrow nozzles.

8. The method of printing according to claim 7, characterized in that the supply of printing fluid(s) is conducted through several narrow nozzles, and the nozzles are regulated individually or in groups regarding the presence or absence of feed of the printing fluid.

9. The method of printing according to claim 7 or 8, characterized in that the supply of printing fluid(s) are carried out through multiple nozzles, and the nozzles individually or in a group regulated with respect to the duration or intensity of the expiration of the printing fluid.

10. The method of printing according to claim 7, distinguish the different topics he is a piezoelectric method.

11. The method of printing according to claim 7, characterized in that it is a method of inkjet printing.

12. The use of the printing liquid according to any one of claims 1 to 6 for inkwells.

13. The use of the printing liquid according to any one of claims 1 to 6 for marking objects, in particular, in the manufacture of banknotes, shares, cheques.

14. The use of the printing liquid according to any one of claims 1 to 6 for printing devices provided with one or more narrow nozzles.

15. The subject, in particular banknote, bond, cheque, on which is printed using a printing fluid according to one of claims 1 to 6, or according to a method according to one of claims 7-11.



 

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2 tbl

FIELD: chemical industry; printing industry; other industries; methods of production of the composition of the paint including the optically changeable pigments.

SUBSTANCE: the invention may be used in production of the optically changeable pigments. The optically changeable pigment includes the stratified set composed of the different materials, in which, at least, one of the layers represents the reflecting layer and, at least, one of the other layers represents the dielectric layer. At least, one of the surfaces of the indicated layers is subjected to the chemical action. The indicated materials also include, at least, one of the layers, which represents the semitransparent metallic layer made out of chromium and also one or more metals and-or their inorganic compounds. At that the metal and-or its inorganic compound are subject to corrosion. The subjected to the chemical action surface of the reflecting and dielectric layer along the edge of the layering block of the edge structure of the pigment is coated with the passivating agent, which is selected from the group consisting of the organic esters and the fluorinated organic esters of the phosphoric acid, having the following structural formula: (Rf-CH2-CH2-O)xP(O)(OH)y, where Rf=F-(CF2-CF2)z, х=1 or 2, у=2 or 1, х+у=3, z=l-7. The composition of the printing paint includes the binding system, water and the optically changeable pigment. The invention allows to diminish oxidation of the metallic layers and dissolution of the dielectric layers of the optically changeable pigment and to use it in the compositions of the printing paint.

EFFECT: the invention allows to diminish oxidation of the metallic layers and dissolution of the dielectric layers of the optically changeable pigment and to use it in the compositions of the printing paint.

22 cl, 7 ex

FIELD: marking and identification of protected articles, such as bank-notes, service papers, labels, foil, fiber, card or industrial products.

SUBSTANCE: proposed printing ink contains dyes or pigments of expanded or hyperchromatic color space which is not reproduced by means of standard 4-color reproducing equipment. Identification of marking includes mathematical conversion of non-processed spectral information into statically independent hyperchromatic coordinates and comparison of selected hyperchromatic coordinates with respective standard magnitudes. Specification gives also description of printing inks and method of marking and identification of articles.

EFFECT: enhanced efficiency.

25 cl, 6 dwg, 2 tbl, 4 ex

FIELD: marking and identification of protected articles, such as bank-notes, service papers, labels, foil, fiber, card or industrial products.

SUBSTANCE: proposed printing ink contains dyes or pigments of expanded or hyperchromatic color space which is not reproduced by means of standard 4-color reproducing equipment. Identification of marking includes mathematical conversion of non-processed spectral information into statically independent hyperchromatic coordinates and comparison of selected hyperchromatic coordinates with respective standard magnitudes. Specification gives also description of printing inks and method of marking and identification of articles.

EFFECT: enhanced efficiency.

25 cl, 6 dwg, 2 tbl, 4 ex

FIELD: polymer production.

SUBSTANCE: invention relates to production of polymeric binders for toner and can be used for copying appliances and printers. Process comprises separate preparation via emulsion polymerization of (i) low-molecule weight copolymer of styrene (α-methylstyrene), 2-ethylhexyl acrylate (or butyl acrylate) and methacrylic acid at monomer weight ratio (88-91.5):(8-11):(0.5-1.0) with intrinsic viscosity in toluene 0.08-1.2 dL/g and (ii) high-molecule weight copolymer of styrene (α-methylstyrene) and 2-ethylhexyl acrylate (or butyl acrylate) at monomer weight ratio (88-92):(8-12) with intrinsic viscosity in toluene 1.0-1.28 dL/g. In both cases, polymerization is carried out at 60-70% to monomer conversion close to 100%. Resulting latexes of low- and high-molecule weight copolymers are supplemented by stopper and antioxidant and then mixed with each other at "dry" weight ratio between 70:30 and 75:25 and coagulated intrinsic viscosity in toluene 1.0-1.28 dL/g. with electrolyte solutions to form polymer characterized by intrinsic viscosity in toluene 0.4-0.45 dL/g and polydispersity Mw/Mn, which ensures bimodal molecular weight distribution of copolymer. The latter has melting (spreading) point 125-137°C and softening temperature 70-75°C.

EFFECT: improved quality of electrographic printing.

2 cl, 1 tbl, 4 ex

FIELD: chemical industry; methods of production of the coatings with the strong adhesion.

SUBSTANCE: the invention is pertaining to the method of production of the coatings with the strong adhesion on the inorganic or organic substrate, which provides, that one inorganic or organic substrate is subjected to the treatment with the low-temperature plasma, the corona discharge or the treatment with the gaseous flame, at the normal atmospheric pressure deposit on the inorganic or organic substrate one or several photoinitiating agents or the mixtures of the at least one ethylene- unsaturated with the monomers and-or the oligomers containing at least one ethylene- unsaturated group, or the solutions, suspensions or emulsions of the above indicated substances using the suitable methods; the above indicated substances are not necessary subjected to drying and-or to the electromagnetic irradiation; and either on the preliminary so treated substrate deposit the composition including at least one ethylene- unsaturated monomer or the oligomer and the coating is subjected to hardening under action of the UF/ the visual rays emission or the electron beam; or on the substrate with such a preliminary coating made out of the photoinitiating agent they apply the printing ink coating and dry it. The method has the high efficiency and allows to produce the coating with the good adhesion and is suitable for to production of the products made out of the various plastics materials and-or metals or the glass types with the coatings having the good adhesion.

EFFECT: the invention ensures the high efficiency of the method, production of the highly adhesive coatings suitable for manufacture of the products made out of the various plastics materials, metals or the glass types.

18 cl, 19 ex

FIELD: chemical industry; polygraphy; methods of the stencil printing.

SUBSTANCE: the invention is pertaining to the paint suitable for the stencil printing inside the pressurized castings. The invention describes the paint suitable for the printing films made out of the transparent thermoplastic, consisting predominantly of: a) one or several pigments; b) the binding in the solution in c) the organic solvent or in the mixture of the organic solvents, d) the routine auxiliary materials, if it is desirable, at that as the binding use the copolymer of the poly-(metha)-acrylate containing (м1) from 50 up to 90 % to the mass of alkylmethacrtlate having from 1 up to 6 atoms of carbon in the ethereal radical; (м2) from 5 up to 25 % to the mass, at least, one vinylaromatic compound; (м3) from 1 up to 25 % to the mass of maleic anhydride, and if it is desirable, (м4) from 0 up to 5 % to the mass of the alkylacrylate having from 1 up to 6 atoms of carbon in the ethereal radical or the copolymer of the poly-(metha)-acrylamide containing polymethylmethacrylate with the degree of imidization from 65 up to 80 %, to 1 up to 15 mass % of methacrylic acid and from 1 up to 15 mass % of methacrylic anhydrade. At that the indicated copolymer has the softening temperature by VIKA (ISO 306 B) at least of 115°С. As the dissolvents use aliphatic, cycloaliphatic and aromatic hydrocarbons, ketones, esters, ethers, alcohols, phenoles or their mixtures. The invention also describes the film made out of the thermoplastic printed by the above described paint; the pressurized casting consisting of the film made out of the thermoplastic printed on the opposite side with the above described paint and supplied on this side with the layer of the thermoplastic coating. At that the indicated layer is applied by the operation of pressure die casting on the inside and at that the film and-or the plastic material for operation of the pressure die casting on the inside represents the copolymer of polymethylmethacrylate; and the method of production of the pressurized castings includes the following stages: a) stencil printing of the thermoplastic films by the above described method, b) the film molding, c) the pressurized castings on the inside on the stencil printed film side in the casting mould with the thermoplastic, and d) removal of the pressurized casting from the casting mould. The technical result of the invention: the paint is resistant to the action of the high pressures and temperatures during the operation of the pressurized casting on the inside, the image stencil printed by the paint has the stable color after long-term action of the atmospheric conditions.

EFFECT: the invention ensures, that the paint is resistant to the action of the high pressures and temperatures during the operation of the pressurized casting on the inside, the image stencil printed by the paint has the stable color after the long-term action of the atmospheric conditions.

6 cl, 1 tbl

FIELD: printing dyes.

SUBSTANCE: invention relates to concentrate of printing dyes and a method for its preparing. Invention describes dye concentrate for offset printing in form non-sticky granules covered by envelope and/or non-sticky granules without envelope with the pigment content in its 45-65 wt.-%. Envelope-cover consists of powder-like solid materials, wax or liquid materials, for example, oil. Also, invention describes a method for preparing indicated concentrate that involves grinding dye concentrate for offset printing and its covering by envelope wherein covering by envelope is carried out by direct applying powder-like solid material on the printing dye concentrate and wherein powder-like solid materials are combined firstly with liquid carrier followed by its evaporation, or solid envelope is prepared by applying melted material useful for coating. Invention provides decreasing viscosity and stickiness of the printing dye concentrate and allows simple transporting and simple mixing with additional components.

EFFECT: improved and valuable properties of concentrate.

9 cl, 12 ex

FIELD: valuable paper securities and method for manufacturing of valuable paper securities protected from counterfeit.

SUBSTANCE: method involves introducing protective member formed as figured metallized polymeric thread onto net of netted cylinder of papermaking machine; dehydrating while forming face layer from pulp; pressing. Thread has central core and wing-shaped side members. During pressing, protrusion of thread wing ends above net surface onto paper surface, along at least one edge of figured thread by means of said members is provided, so that intermittent line is formed with constant or varying intervals between ends of thread wings.

EFFECT: enhanced protection of valuable paper securities from counterfeit.

6 cl, 13 dwg

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