Ink coatings for protected documents, designed to prevent counterfeiting by using erasable thermosensitive ink

FIELD: printing.

SUBSTANCE: invention relates to the field of protecting the securities from counterfeiting. The composition of unstable ink obtained solvent-based or from UV-curable components is described. The unstable ink composition is designed for application to a substrate on which marks are to be placed. The ink composition includes at least one halochromic compound and at least one ionic filler compound. The said unstable ink composition is capable to prevent the marks obtained by using thermosensitive erasable ink and then subjected to heat treatment in the substrate area carrying the unstable ink composition to pass into the state of invisibility to the naked eye, ensuring the prevention of counterfeiting on securities by using thermosensitive erasable ink.

EFFECT: invention expands the range of the means of securities counterfeit protection.

24 cl, 11 dwg, 3 ex, 6 tbl



Same patents:

FIELD: physics, optics.

SUBSTANCE: mix comprises first set of pigment scales oriented by magnetic field. Said scales can vary their colour from first to second colour at first change of the angle of vision. Second set of pigment scales not oriented by magnetic field that can vary their colour from said first to third colour at second change of the angle of vision other than the first one. Note here that said first, second and third colours are different colours. Scales of said first and second sets are applied on substrate in binder that makes the mix of scales. Note also that said scales have said first colour if seen on substrate at direct angle. Note also that scales oriented by magnetic field are oriented, in fact, in similar way differing from orientation of scales not oriented by magnetic field so that substrate inclination relative to first axis causes the change in seen colour from said first to said second colour. Substrate inclination relative to second axis perpendicular to first axis causes the change of colour from first colour to said third colour.

EFFECT: coat colouration changing.

8 cl, 10 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to novel active dyes, methods of their obtaining and their application in dyeing or printing textile fibrous materials. An active dye of formula in which B represents a radical of formula -CH2-CH(R12)- or -(R12)CH-CH2-, in which R12 represents C1-C4alkyl, R5 represents hydrogen or sulpho, Z1 represents a fibre-reactionable group of formula -SO2-Y (3a) or -NH-CO-(CH2)l-SO2-Y (3b), R7 represents amino, R8 represents C2-C4alkanoylamino or ureido, X1 and X2 represent, each independently on the other, fluorine or chlorine, k equals a number 2 or 3, l equals a number 2 or 3 and Y represents vinyl or β-sulphatoethyl.

EFFECT: invention makes it possible to obtain the improved active dyes with high reaction ability, chemical affinity, as well as with good dyeability with a high degree of fixation.

8 cl, 2 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: invention relates to compositions for obtaining electroconductive coatings on substrates surface. Described is a printing composition for obtaining the electroconductive coatings based on silver particles dispersed in water. The composition contains: a) from 5 to 40 wt.p. of metal silver particles with an effective diameter from 10 to 150 nm, with the silver particles having bimodal distribution of particles by sizes; from 50 to 99.5 wt.p. of water and, if necessary, to 30 wt.p. of a solvent; c) from 0.01 to 15 wt.p. of a dispersing agent; d) from 0 to 5 wt.p of additives; e) from 0 to 5 wt.p. of electroconductive, if necessary, water-soluble, polymers; f) from o.5 to 5 wt.p. of a thickening agent; g) from 30 to 70 wt.p. of silver particles or silver-coated copper particles with an effective diameter from 500 nm to 10 mcm. The composition has a viscosity, at least, 1 Pa·s. Also described is the application of the composition for obtaining the electroconductive coatings, method of obtaining current-conductive paths and a polymer substrate with the electroconductive coating from the claimed composition.

EFFECT: invention provides an effective elctroconductivity of electroconductive structures on thermally stable surfaces with the application of offset printing and screen printing.

15 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention can be used for inkjet printing. A porphyrazine colorant or its salt is represented by formula (1), where rings A-D each independently represents a benzene ring or a 6-membered nitrogen-containing heteroaromatic ring. E represents alkylene, X represents sulfo-substituted group aniline or the like, which can additionally have a substituent, R1 represents C1-C6 alkyl group, b equals to 0.00 or more and less than 3.90, as the average value, c equals to 0.10 or more and less than 4, as the average value, and the sum of b and c equals to 1.00 or more and less than 4.00, as the average value. The composition of colorant for inkjet printing, which contains the porphyrazine colorant or its salt.

EFFECT: invention makes it possible to obtain the composition of a colorant, which has good shade, possesses excellent properties of various types of resistance, in particular, ozone resistance, provides a possibility of high density of printing, possesses properties which almost do not produce a bronze tint effect.

21 cl, 5 tbl, 17 ex

FIELD: printing.

SUBSTANCE: invention relates to an ink set containing chromophoric metals for digital printing on ceramic materials. The ink set comprises liquid colouring compositions (A), (B), (C) and one from (D) and (E). The (A) comprises at least a compound of cobalt. The (B) comprises at least a compound of iron. The (C) comprises at least a compound of a metal selected from chromium, nickel and their mixtures. The (D) comprises at least a compound of cobalt and at least a compound of iron. The (E) comprises one or more compounds of zirconium. The said metal compounds decompose at a temperature of from 500 to 1300°C. When interacting with the ceramic material the metal compounds of compositions (A)-(D) form colured oxides or colured compounds. The compounds of zirconium from the composition (E) with the ceramic material form white oxides or white compounds. Also the method of decorating ceramic materials by digital printing using the specified set of ink and the decorated ceramic products produced using this method are described.

EFFECT: invention provides ceramic materials decorated with digital printing of wide range of colours with the effect of natural stone.

11 cl, 45 tbl, 5 ex

Conductive pastes // 2509789

FIELD: chemistry.

SUBSTANCE: invention relates to conductive pastes for forming metal contacts on the surface of substrates for photovoltaic cells. The conductive paste is substantially free of frit glass. According to one version of the invention, the conductive paste contains organometallic components which form a solid metal oxide phase upon firing and conductive material. The organometallic components are selected from a group which includes metal carboxylates or metal alkoxides, where the metal is boron, aluminium, silicon, bismuth, zinc or vanadium. According to another version, the conductive paste includes multiple precursors which form conductive elements upon firing or heating. The paste is adapted for adhesion to the surface of a substrate and upon firing, forms a solid oxide phase while forming an electrical conductor from conductive materials on the substrate.

EFFECT: use of said conductive paste in a line of a conductive array of photovoltaic cells provides high efficiency and fill factor of the photovoltaic cell.

14 cl, 2 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: composition for making sensor coatings contains antimony-doped tin dioxide of the formula SbxSn1-xO2, where x=0.1-0.3, and water in ratio SbxSn1-xO2:H2O = 89-87:11-13 wt %. The method of preparing the composition involves hydrothermal treatment of tin and antimony hydroxides at 170°C for 48 hours. The tin and antimony hydroxides are obtained by dissolving Sn and Sb metal in concentrated hydrochloric acid, 18-20 wt %, while adding 3-5 wt % concentrated HNO3. The obtained solution is 2-3 times diluted with distilled water and a calculated amount of ammonia solution is added. Using a simple scheme, the disclosed method enables to obtain nanoparticles of said composition SbxSn1-xO2 with size of 30 nm and surface area of 154 m2/g, which can be used as the basic component of electroconductive ink for printing sensor arrays and microcontacts.

EFFECT: low labour and power consumption.

3 cl, 6 dwg, 3 ex


FIELD: chemistry.

SUBSTANCE: conductive paste contains frit glass, a conductive material, an organic medium and one or more organometallic components which form metal oxides when burnt. The organometallic components are selected from a group comprising a metal carboxylate and a metal alkoxide, where the metal is boron, aluminium, silicon, bismuth, zinc or vanadium. When deposited on antireflecting coating on a substrate, the conductive paste is capable of penetrating the coating to form an ohmic contact with the substrate. Described also is a photovoltaic cell, having a semiconductor substrate, an antireflecting coating and lines of a conductive mesh formed from said conductive paste.

EFFECT: high efficiency of the photovoltaic cell, improved adhesion and ohmic contact between metallic elements and the substrate through antireflecting coatings.

10 cl, 1 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to use of a composition which contains: a) 0.1-20 wt % binder which contains a polycarbonate derivative based on geminally disubstituted dihydroxydiphenyl cycloalkane, b) 30-99.9 wt % solvent, c) 0-10 wt %, with respect to dry mass, dye or mixture of dyes, d) 0-10 wt % functional material or mixture of functional materials, e) 0-30 wt % additives and/or auxiliary substances or a mixture thereof, as jet printing ink. The invention also relates to a method of producing a composite and a composite which contains a polymer layer on which there is a jet printing layer of said composition.

EFFECT: invention is aimed at producing agents which enable to use jet printing in making counterfeit protected documents and/or valuable documents based on polycarbonate layers, and which enable to deposit jet printing layers on layers which meet all optical requirements, which can be coloured, wherein lamination does not deteriorate optical properties of the layers and said layers do not act as a separating layer and facilitate formation of a monolithic composite.

31 cl, 2 tbl, 2 dwg, 8 ex

FIELD: physics, computer engineering.

SUBSTANCE: invention describes a security element for a data medium, having an ink layer and an effect layer which, upon viewing from a first angle is substantially transparent and upon viewing from at least one second, so-called effect angle, shows a colour tone which, at least on the first portion of the effect layer, produces a complementary contrast with the colour tone of the ink layer.

EFFECT: invention provides high degree of security from counterfeit.

18 cl, 9 dwg

FIELD: printing.

SUBSTANCE: protection element comprises a matrix of relief lines, and each line has at least one lateral side of each of which determines the angle of inclination relative to the direction of normal to the matrix. The angle of inclination of the lateral side of at least one matrix line changes gradually along this line so as to form in the light reflection the optical effect of halftones, variable in a function of the viewing angle of the protection element.

EFFECT: proposed protection element enables to create complex patterns and identify them at any viewing angle.

29 cl, 16 dwg

FIELD: physics, computer engineering.

SUBSTANCE: group of inventions relates to a printing layer of a security element for a data medium. The printing layer comprises elastic microcapsules. The microcapsules have inside them a cholesteric phase-forming liquid crystal which is fixed by a compressible elastomer having at least two areas distinguished by elastic properties. In an uncompressed initial state of the elastomer, the cholesteric phase on said areas has the same specified winding pitch of its spiral structure. Said areas exhibit identical optical properties. With uniform mechanical pressure on the printing layer, said areas experience different deformation and begin to differ by the winding pitch of the spiral structure of the cholesteric phase, thereby reflecting radiation of different colours. The printing layer becomes visible to a person. The invention also describes a method of making a printing layer, a security element, a data medium and a transfer element, having said security element.

EFFECT: invention provides high degree of security of a data medium.

12 cl, 6 dwg

FIELD: printing industry.

SUBSTANCE: multilayer protected composition is formed with an additional multilayer element. The element is formed on the paper surface. The element comprises a multi-colour coating in the form of periodic raster formed by at least two paints of different colours contrasting relative to the paper surface. The paints contain luminescent compounds having daily luminescence in the visible range of light under the influence of natural lighting. The combinations of paints are such that the integral colour of the additional multilayer protected element is visually perceived as unsaturated close to achromatic. One of the embodiments of the protected element forms graphic shape or is part of a graphic shape, which changes its visual display due to changing its colour grade and/or optical density and/or saturation when copying the document on a printing device operating in a colour system CMYK.

EFFECT: increased level of protection of paper or document from forgery by applying a new security feature.

12 cl, 8 dwg, 6 ex

FIELD: printing.

SUBSTANCE: invention relates to a method of production of counterfeit-proof document and/or valuable document comprising a polymer multilayer composite or consisting of it, at that the polymer multilayer composite is formed of a polymer multilayer partial composite and a polymer coating layer, and at that the polymer multilayer partial composite and/or polymer coating layer comprises a laser-sensitive component, with the following process stages: A) on the polymeric multilayer partial composite by means of jet printing the first personalised information attribute is applied in the form of a colour printing layer obtained by method of inkjet printing, B) on the printing layer obtained by method of inkjet printing a polymer coating layer is applied and by thermal lamination is connected to the polymer multilayer partial composite and C) obtained in step B) polymer multilayer composite of counterfeit-proof document and/or valuable document by means of laser engraving the second personalised information attribute is applied.

EFFECT: invention relates to counterfeit-proof document and/or valuable document obtained by such method.

17 cl, 5 dwg

FIELD: printing industry.

SUBSTANCE: invention relates to the field of protection of valuable documents against forgery and is designed for the instrument determining the authenticity of the protected printing products, such as all kinds of valuable documents. The valuable document has a marking comprising at least one inorganic compound with a crystal structure, doped with ions of rare earth elements, having the property of selective interaction with the radiation in the optical spectral range, characterised in that when exposed to radiation on it in a predetermined band of the optical spectrum the radiation of the compound only in this band of the spectrum has an excess over the temperature radiation with the final duration of 10-10 seconds and more.

EFFECT: improving the level of protection of the valuable document.

10 cl, 2 ex

FIELD: printing.

SUBSTANCE: invention relates to the field of protection of valuable documents against forgery. The valuable document comprises on its surface an invisible protective marking applied on the elongated section along the long side of the document, which is intended for the instrument reading. The protective marking has the property of selective absorption of the radiation in the range optical spectrum from 0.76 mcm to 10 mcm. The marking is wholly or partially located in the area of additional masking marking. The material of the latter has the property of re-radiation when exposed of the exciting radiation of the same spectral composition as the material of the protective marking, but is characterised with magnitude of afterglow time. The method of determining the authenticity of the valuable document comprises revealing the hidden security marking on the valuable document. The revealing of marking is carried out by registration of afterglow of its material after removal of the exciting radiation and/or by registration of the diffuse reflection of the material in the optical range of wavelengths from 0.76 mcm to 10 mcm. Violation of the predetermined information indicates full or partial forgery.

EFFECT: increase in the level of protection of the valuable document against forgery.

13 cl, 4 ex

FIELD: information technology.

SUBSTANCE: data medium has a substrate having a portion with a distinctive feature formed by a family of curves which includes a plurality of arched and/or diverging slit lines. Inside the portion with a distinctive feature there is an identification mark which is configured for visual or computer recognition and is a pattern, symbols or code. Said identification mark is formed by a portion of the substrate which does not have slits and has a family of marking curves, which includes a plurality of marking lines connected to the slit lines outside the identification mark.

EFFECT: high degree of counterfeit protection.

22 cl, 13 dwg

FIELD: printing.

SUBSTANCE: invention relates to a method and also the device for colour individualisation of security documents, as well as to security documents for colour individualisation with the body of the document. The starting materials are located inside this document body, which by localised targeted energy input are excited to create or modify the nanoparticles of different type and/or local concentration while the colour perception of the nanoparticles depends on their type and/or local concentration. For individualisation of such security document with such document body, the energy is injected locally purposefully into the place where in the document body the colour perception should be achieved in order to keep the individualising information through the achieved colour perception. At that, to achieve the colour change the dependence of absorption of light by nanoparticles on the wavelength is modified, which is not only the change in the absorption efficiency in the absorption spectrum, the colour change is due to the quantisation effect of the nanoparticles, and the colour perception is set by the energy input.

EFFECT: proposed invention provides the ability of colour individualisation of the document.

21 cl, 5 dwg

FIELD: information technology.

SUBSTANCE: graphic elements are deposited using printing techniques on one or both sides of the medium, wherein mutual arrangement thereof is such that said elements form an image having an optically variable effect. The graphic elements are deposited by scratch-off printing while meeting the following conditions: engraving groove depth should not exceed 14 mcm and the width of the graphic elements should be of the order of the thickness of the data medium. The obtained data medium retains its flatness. The thickness of the paint layer is in the range of 3 to 10 mcm.

EFFECT: high degree of protection of articles while obtaining a novel optically variable effect or movement effect, high manufacturability and low cost of the protective element.

8 cl, 10 dwg, 2 ex

FIELD: information medium sealed up by the method of metallographic printing, method for its manufacture, as well as a printing plate suitable for the purpose and the method for its manufacture.

SUBSTANCE: the information medium, first of all a bank note, securities or a similar document, which has at least one sealed up section (13) and at least one separate section (14) practically completely encircled by this section. The mentioned section (13) and the separate section (14) are sealed up by the metallographic method, and both sections are sealed up by paint coats of a different thickness and differ from one another.

EFFECT: provided a high degree of protection against forgery of the information medium.

21 cl, 11 dwg