Thermo-sensitive tags for detecting adulteration

FIELD: chemistry.

SUBSTANCE: composition of the paint includes particles of optically variable pigment and thermally expandable spheres containing propellant. The pigment can be a thin-film interference, interference coated, cholesteric liquid crystal, or a mixture thereof. To produce tags for detecting adulteration, an optically variable paint is applied on a substrate by printing. The application can be carried out by screen printing, flexographic or rotational gravure. Adulteration of the tag on the substrate is detected by the irreversible colour change and/or the tag structure when exposed to a temperature of at least 35°C. The product on which the optically variable paint is applied represent valuable documents: a stamp on the tax payment, an excise stamp; or valuable products: cosmetic, nutraceutical, pharmaceutical, alcoholic beverages, beverages or food, electrical/electronic products, fabrics, and jewellery.

EFFECT: ability to prove the adulteration by applying optically variable paint.

22 cl, 1 dwg, 2 tbl, 2 ex



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: printing industry.

SUBSTANCE: data protection device comprises an optically variable diffraction structure coated with scratch layers, lying above the data to be protected. Besides, the device comprises at least the first and the second non-transparent metal layers separated with a flexible light-absorbing separation layer. Invention also relates to a scratch card, which comprises such a device.

EFFECT: group of inventions provides for development of such a data protection device, which guarantees high non-transparency, even when a scratch foil is weakened.

11 cl, 5 dwg

FIELD: printing industry.

SUBSTANCE: carton box stock has a hologram, contains substrate material with inner surface and outer surface. Outer surface has coating with metal particles, and also from zero to one or more paint coating applied above part of metal surface and a coating that is substantially transparent and cured as exposed to radiation, applied above paint coating. At the same time the hologram is formed in a coating cured as exposed to radiation in area of exposed underlying metal coating as a cured coating to be cured as exposed to radiation. Proposed holographic image on package is provided exclusively by printing stage.

EFFECT: improved efficiency and speed of hologram formation, and also reduced cost of its production.

21 cl

FIELD: metallurgy.

SUBSTANCE: invention relates to field of mechanical treatment of sheet or roll or laminated material, particularly to methods and facilities of mechanical deformation without removing of the material, for instance for stamping, at implementation of claimed image embossing method, creating image of copied original (pictures, photographies) with transfer of halftones, on to strip or belt made of foil or laminated material with metallic external layer, image is embossed with usage of calender, allowing driving and at least one driven shafts, on working surface of one or on working surfaces of both shafts there are implemented projection lines, herewith at one shaft by means of engraving with removing of projection materials (by curved surface or planes) in the range of its height it is implemented embossed surface, shape and variable depth of which is defined according to copied image original additionally depth of embossed surface in places of projection materials removing, is located depending on transmission density of corresponding sections of copied image and is situated in the range of value, corresponding the location of projection foundation, up to the zero value, corresponding the location of projection vertex, with implementation on treated material of stamping variable depth, providing the effect of imitation of different levels of grey, corresponding to darker or lighter sections of original of copied image, with creation of image, similar to photography, differently ("negative" or "positive") interpreted depending on observation angle, and/or of kind, and/or of light source location. It is described also the other version of method, calenders for method implementation and stamped material, made of described methods with usage of declared calenders versions.

EFFECT: creation of method and calender, providing receiving on foil or metallise material of image like a photo, allowing high degree of protection against imitation.

FIELD: polygraphy.

SUBSTANCE: method includes applying a protective element in form of micro-perforation to each unit of polygraphic product. Protection element is made in form of thematic image, which is producing using a stamp with linear knives 75 micrometers thick to produce perforation in form of lines using linear micro-notching of sheet carrier within limits of contour of thematic image for visualization of this image made in form of mark micro-perforation when the sheet is illuminated.

EFFECT: increased degree of protection of sheet carrier from forgery.

1 dwg

FIELD: controlling elements for printed objects, in particular, securities and their analogs.

SUBSTANCE: control element contains first pattern, which is imprinted on first side of object and contains at least a first set of geometric shapes, and also second pattern, imprinted on second side of object. Second pattern is imprinted oppositely to first pattern with maintenance of register, while second pattern contains at least a second set of geometric shapes, matching first bitmap. At least one of series of geometric shapes contains portions positioned so, that in register of correct installation of two-sided printing register control element contains zones of varying density, browsed during show through and formed by given shifted portions.

EFFECT: increased level of protection of printed objects from forgery, with use of control element.

3 cl, 39 dwg

The invention relates to printing tools and equipment, and in particular to methods and means of die stamping and woodblock character set on the payment documents, goods receipts, accounts, etc

The invention relates to a material for painting, which prevents the emergence of random colored marks on other than designated surfaces

The invention relates to the design of the production line to get colourful printed products and is used for the manufacture of lottery tickets of various types

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