DE60211658T2 - Improved information carrier and identity card - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION

The The present invention relates to a process for producing a improved information carrier.

GENERAL STATE OF THE ART

As a result of the progress of the information-oriented society various types of identification cards (ID cards) in recent years found their way to the market. By way of example, cards for electronic transfer include of money bank cards, payment cards, credit cards and shopping cards. Various types of security cards allow the cardholder access to specified areas such as a company (employee ID card), military installations, buildings from public Services, the vault of a bank, etc. Have long been national states identity cards as proof of nationality their subjects. As other types of identification cards are social security cards, membership cards from clubs and clubs and license cards to call.

Such ID cards usually contain information regarding both the card issuing authority as the cardholder. The first type of information can be general Information, such as a name and / or logo of the issuing authority, or Security markings, such as a watermark and security printing, e.g. a repeating monochrome pattern or a gradually changing one Color patterns that are difficult to fake are. The second type includes e.g. the unique card number, personal Dates such as the birthday, a photograph of the owner and a signature. The card may also contain hidden information and for this Purpose a magnetic stiffeners or an electronic chip ("smart cards") included.

The Making a big one Number of ID cards is usually done in a repeating process on a big one information carrier as a web or a sheet, after which the information carrier in several Units of reasonable dimensions, each representing a personal ID card, is tailored. Current smart cards and ID cards have standardized Dimensions on, i. 85.6 mm × 54.0 mm × 0.76 mm.

Usually the card is protected by a plastic film material, wherein For example, the card is laminated on a plastic film or, like the usual is laminated in a composite disc between two plastic films becomes.

With respect to the widespread use of ID cards, particularly in transactions such as check-in, credit purchase, etc., it is important that the person trusting the ID card to identify the owner maximally care can leave that the ID card has not been changed and / or is a fake. Achieving such a level of safety has required a great deal of invention. By way of example, special adhesive systems and special lamination techniques have been developed to prevent or discourage ID card modification. These systems and techniques have been developed to ensure very efficient adhesion between a surface of the card and any plastic film material adhered thereto. For example, certain adhesive systems create an element known to those skilled in the art as "safety seals." The best way to describe a "security seal" is by what happens when one attempts to peel off a plastic film material from the surface of a card bonded to the plastic. If a "security seal" is present, the adhered surface together with the plastic film material is completely or partially detached from the card. Accordingly, a "security seal" is typically applied between the information bearing surface of the card or document and the plastic material. Under such conditions, as the plastic is removed, large areas of the information-carrying surface of the card are also to be released and the card thus becomes useless in order to be changed. Adhesives or adhesive systems with which "security seals" can be produced are described, for example, in US Pat. No. 3,582,439, US Pat. No. 3,614,839 and US Pat. No. 4,115,618 US 4,322,461 For example, a security seal can be made by applying hot melt polymers to obtain a sealed envelope-like pouch.

The department also responded to the problem of counterfeiting by incorporating "probes" in ID cards, which can verify the authenticity of the ID card. The most well-known of these "inspection elements" are signatures, such as the signature of the person authorized to issue the ID card or the signature of the cardholder. Other "test elements" include watermarks, fluorescent materials, validation patterns or validation marks, and polarizing stripes. These "test elements" are built into ID cards in various ways and are visible or invisible in the finished card. Invisible test elements are detected by examining the test element under conditions that make it visible. More details about the use of test elements in ID cards can be found in the patents US Pat. No. 2,984,030, US Pat. No. 3,279,826, US Pat. No. 3,332,775, US Pat. No. 3,414,998, US Pat. No. 3,675,948 U.S. Patent 3,827,726 and U.S. Patent 3,961 956th

In US 4,232,079 discloses a protective film composite to be laminated on an information-bearing document and containing a test pattern of a transparent pigment.

In US 4,389,472 there is disclosed a tamper-resistant document comprising an information carrier containing a photographic information-containing sheet and laminated thereon at least one sheet provided with an adhesive layer containing a polymer cured by radical crosslinking with high-energy radiation or by initiators, wherein the Initiators by UV light or thermally activated.

In US 5 525 400 discloses a multilayer composite film structure wherein both sides of a film, one side of which contains a reflective microporous layer rendered translucent by an adhesive, are provided with an adhesive layer. On its side containing the microporous layer, the film is provided with an ink-jet printed image. The composite is cured by ultraviolet radiation. This arrangement is rather complicated and there is no talk of different types of information in the patent application.

SHORT PRESENTATION THE PRESENT INVENTION

task The present invention is to provide a method for producing an improved type of information carrier, the Easy to manufacture, a simple layer structure and can be tailored to a set of ID cards.

A Another object of the present invention is that the thus obtained information carrier can contain at least two different types of information.

A Another object of the present invention is that the from the information carrier customizable ID cards are forgery-proof.

• (1) Bereitstellen einer doppelschichtigen Anordnung, die (i) einen harten Bogenträger oder Bahnträger und (ii) eine poröse lichtundurchlässige, ein Pigment und ein Bindemittel enthaltende Tintenaufnahmeschicht enthält, wobei entweder die Oberfläche des Trägers oder die Oberfläche der lichtundurchlässigen Schicht einen ersten Satz von gedruckter Information enthält,
• (2) Drucken eines zum ersten Satz unterschiedlichen zweiten Informationssatzes auf die poröse lichtundurchlässige Tintenaufnahmeschicht durch Tintenstrahldruck,
• (3) vollflächiges, teilflächiges oder mustermäßiges Auftragen, Drucken, Aufsprühen oder Aufschleudern einer UV-härtbaren Lackzusammensetzung auf die so erhaltene Anordnung, wobei das Eindringen des Lacks in die poröse lichtundurchlässige Tintenaufnahmeschicht diese Schicht wesentlich durchsichtig macht und die Brechungsindizes des Pigments und des UV-härtbaren Lacks höchstens 0,13 auseinander liegen, und
• (4) Härtung der Lackzusammensetzung durch vollflächige Bestrahlung mit Ultraviolettstrahlung, wobei sowohl die Haftung zwischen dem Träger und der Tintenaufnahmeschicht als die Kohäsionsstärke der Tintenaufnahmeschicht verbessert werden.

The above-described desired characteristics are achieved by providing a method of fabricating a tamper-resistant information carrier sequentially by the following steps

• (1) providing a double-layered assembly comprising (i) a hard sheet support or web support and (ii) a porous opaque ink-receiving layer containing a pigment and a binder, wherein either the surface of the support or the surface of the opaque layer comprises a first set of contains printed information,
• (2) printing a second set of information different from the first set on the porous opaque ink receiving layer by ink jet printing,
• (3) applying, printing, spraying or spin-coating a UV-curable lacquer composition over the entire area, area or pattern, the penetration of the lacquer into the porous opaque ink-receiving layer rendering this layer substantially transparent and the refractive indices of the pigment and UV curable paints are at most 0.13 apart, and
• (4) Curing of the paint composition by full-surface irradiation of ultraviolet rays, whereby both the adhesion between the support and the ink-receiving layer and the cohesive strength of the ink-receiving layer are improved.

In an alternative embodiment will be the UV curable Composition applied patternwise, the resulting Pattern serves as a watermark and thus the (described in step 1) Attaching the first information set is optional.

In a preferred embodiment contains the final Arrangement further comprises a transparent protective cover film, in front of the UV curing step laminated becomes.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

in the The following describes in detail the particular layer arrangement and the ingredients of the information carrier of the present invention.

- Bow- or railway carrier

As the support of the present invention, any paper support and polymer support generally known in the field of photographic technology can be used. As the paper support, plain paper, cast-coated paper, polyethylene-coated paper and polypropylene-coated paper are mentioned. Polymeric supports include cellulose acetate propionate or cellulose acetate butyrate, polyesters such as polyethylene terephthalate and polyethylene naphthalate, polyamides, polycarbonates, polyimides, polyolefins, poly (vinyl acetals), polyethers and polysulfonamides. Other examples of high-quality polymer supports which can be used according to the invention include opaque white polyesters and extrusions mixtures of polyethylene terephthalate and polypropylene. Polyester film supports, and especially polyethylene terephthalate supports, are preferred for their excellent dimensional stability properties. When using a polyester support as the support material, an adhesive layer must be used to improve the adhesion of the ink-receiving layer to the support. Useful adhesive layers for this purpose are well known in the photographic field. Examples include polymers of vinylidene chloride such as terpolymers of vinylidene chloride, acrylonitrile and acrylic acid or terpolymers of vinylidene chloride, methyl acrylate and itaconic acid.

In In a most preferred embodiment, the carrier is a colored carrier or a carrier whitewashed Polyvinyl chloride or polyethylene terephthalate.

- Ink-receiving layer

One An essential feature of the present invention is that the ink receiving layer is porous and a binder and contains a pigment.

When Binders come in various ways well known to those skilled in the art Compounds in question, i.a. Hydroxyethyl cellulose, hydroxypropyl cellulose, Hydroxyethylmethylcellulose, hydroxypropylmethylcellulose, hydroxybutylmethylcellulose, Methylcellulose, sodium carboxymethylcellulose, sodium carboxymethylhydroxyethylcellulose, water-soluble Ethyl hydroxyethyl cellulose, cellulose sulfate, polyvinyl alcohol, vinyl alcohol copolymers, Polyvinyl acetate, polyvinyl acetal, polyvinyl pyrrolidone, polyacrylamide, Acrylamide / acrylic acid copolymer, polystyrene, Styrene copolymers, acrylic acid or methacrylic acid polymers, Styrene / acrylic acid copolymers, Ethylene / vinyl acetate copolymer, vinylmethyl ether / maleic acid copolymer, poly (2-acrylamide-2-methylpropanesulfonic acid), poly (diethylenetriamine-co-adipic acid), polyvinylpyridine, Polyvinylimidazole, epichlorohydrin modified polyethylenimine, ethoxylated polyethyleneimine, polyethylene oxide, polyurethane, melamine resins, Gelatin, carrageenan, dextran, gum arabic, casein, pectin, albumin, starch, collagen derivatives, Collodion and agar-agar.

One preferred binder for the practice of the present invention is a polyvinyl alcohol (PVA), a vinyl alcohol copolymer or a modified polyvinyl alcohol. Most preferably, the polyvinyl alcohol is a silanol-modified Polyvinyl alcohol. Most commercially available silanol-modified Polyvinyl alcohols can be found in the series of POVAL R polymers, Trademark of Kuraray Co., Japan. This R polymer series includes the Types R-1130, R-2105, R-2130 and R-3109, which are mainly characterized by the viscosity of their aqueous solutions differ from each other.

The Silanol groups are reactive towards inorganic substances like silica or alumina. R-polymers can easily by change the pH of their aqueous Solutions or be cross-linked by mixing with organic substances and can water resistant Form films.

When Pigment can be an inorganic compound well known to those skilled in the art Material like silica, Talc, clay, hydrotalcite, kaolin, diatomaceous earth, calcium carbonate, Magnesium carbonate, basic magnesium carbonate, aluminum silicate, Aluminum trihydroxide, alumina, titania, zinc oxide, Barium sulfate, calcium sulfate, zinc sulphide, satin white, boehmite (aluminum hydroxide), Zirconium oxide or mixed oxides are used.

In a preferred embodiment is used as the main pigment silicic acid, Aluminum silicate, clay, calcium carbonate, aluminum hydroxide or Aluminum trihydroxide used.

The use of alumina in ink receiving layers is described in various patents, eg US 5 041 328 . US 5,182,175 . US 5,266,383 . EP 218 956 . EP 835 762 and EP 972 650 ,

Commercially available types of aluminum oxide (alumina) include α-Al ₂ O ₃ types, such as NORTON E700 from Saint-Gobain Ceramics & Plastics Inc., γ-Al ₂ O ₃ types, such as ALUMINUM OXID C from Degussa, Other Aluminum oxide classes such as BAIKALOX CR15 and CR30 from Baikowski Chemie, DURALOX classes and MEDIALOX classes from Baikowski Chemie, BAIKALOX CR80, CR140, CR125 and B105CR from Baikowski Chemie, CAB-OSPERSE PG003, Cabot's trademarks, CATALOX classes and CATAPAL classes from Sasol such as PLURALOX HP14 / 150, colloidal Al ₂ O ₃ types such as ALUMINASOL 100, ALUMINASOL 200, ALUMINASOL 220, ALUMINASOL 300 and ALUMINASOL 520, trademarks of Nissan Chemical Industries, or NALCO 8676, trademarks of ONDEO Nalco.

A useful type of aluminum hydroxide is γ-AlO (OH), also called boehmite, such as, in powder form, DISPERAL, DISPERAL HP14 and DISPERAL 40 from Sasol, MARTOXIN VPP2000-2 and GL-3 from Martinswerk GmbH, liquid boehmite toner systems, eg DISPAL 23N4-20, DISPAL 14N-25 and DISPERAL AL25 from Sasol. Patents on alumina include EP 500021 . EP 634286 . US 5,624,428 . EP 742108 . US 6,238,047 . EP 622244 . EP 810101 , etc.

Useful aluminum trihydroxides include bayerite, α-Al (OH) ₃ , such as PLURAL BT marketed by Sasol, and gibbsite, γ-Al (OH) ₃ , such as the MARTINAL classes marketed by Martinswerk GmbH, such as MARTIFIN OL104, MARTIFIN OL107, and MARTIFIN OL111 from Martinswerk GmbH, MICRAL classes such as MICRAL 1440, MICRAL 1500, MICRAL 632, MICRAL 855, MICRAL 916, MICRAL 932, MICRAL 932CM and MICRAL 9400 from JM Huber Company, HIGILITE classes, eg HIGILITE H42 or HIGILITE H43M from Showa Denka KK, and HYDRAL classes such as HYDRAL COAT 2, HYDRAL COAT 5 and HYDRAL COAT 7, HYDRAL 710 and HYDRAL PGA, from Alcoa Industrial Chemicals.

One useful type of zirconia is NALCO OOSS008, trademark of ONDEO Nalco, acetate stabilized ZrO ₂ and ZR20 / 20, ZR50 / 20, ZR100 / 20 and ZRYS4, trademarks of Nyacol Nano Technologies.

usable Mixed oxides are the SIRAL classes of Sasol and also colloidal Nalco metal oxides, such as Nalco 1056, Nalco TX10496 and Nalco TX11678.

The use of silica as a pigment in ink-receptive elements is known from numerous ancient and recent patents, eg U.S. 4,892,591 . US 4,902,568 . EP 373 573 . EP 423 829 . EP 487,350 . EP 493 100 . EP 514 633 etc. Various types of silica are contemplated, such as crystalline silicic acid, amorphous silica, precipitated silica, silica gel, gas phase silicic acid, spherical silicic acid and non-spherical silicic acid, silica mixed with calcium carbonate, as described in U.S. Pat US 5,281,467 and intrinsic porosity silica as described in WO 00/02734.

The use of calcium carbonate in ink-receiving layers is described in eg DE 2,925,769 and US 5,185,213 , The use of aluminum silicate is described in, for example DE 2,925,769 ,

mixtures from different pigments are also possible.

In an alternative embodiment be the main pigment organic particles such as polystyrene, polymethylmethacrylate, Silicones, melamine-formaldehyde condensation polymers, urea-formaldehyde condensation polymers, Polyester and polyamides used. Mixtures of inorganic and organic pigments are also suitable. Most notably however, the pigment is preferably an inorganic pigment.

The Pigment is in a relationship sufficient to make the ink-receiving layer sufficiently opaque and opaque to make porous. The lower limit of the weight ratio of binder to Total amount of pigment in the first ink receiving layer is preferably about 1:50, most preferably 1:20, while the upper limit is about 2: 1, most preferably about 1: 1. Comes the amount of pigment once over the upper limit, so does the strength of the ink-receiving Layer itself decrease and the image obtained will be a reduction the wipe resistance and more Have properties. If the binder-to-pigment ratio is too high on the other hand, the ink absorptivity of the resulting ink-receiving layer diminish and the image obtained has an increased risk of damage.

Further should the refractive indices of the pigment and the UV-curable Composition (description follows) preferably as possible approach. The closer the refractive indices are to each other, the better after impregnation the ink receiving layer with the photopolymerizable varnish composition obtained transparency will be.

• – spezifische Oberfläche (N₂-Absorption): 750 m²/g
• – mittlere Teilchengröße (Multisizer, Kapillarität 100 μm): 6,7 μm
• – DBP-Adsorption: 175–320 g/100 g
• – Brechungsindizes: 1,45 bis 1,47.

Very particular preference is given to a pigment of the silica type, in particular an amorphous silica having an average particle size between 1 μm and 15 μm, very particularly preferably between 2 and 10 μm. One very commercially available compound is amorphous precipitated silica of the type SIPERNAT 570, trademark of Degussa Co. SIPERNAT 570 is preferably used in an amount of between 5 g / m ² and 30 g / m ² in the ink receiving layer and has the following properties

• Specific surface area (N ₂ absorption): 750 m ² / g
• Average particle size (multisizer, capillarity 100 μm): 6.7 μm
• - DBP adsorption: 175-320 g / 100 g
• Refractive indices: 1.45 to 1.47.

Of the Refractive index of a typical UV-curable coating composition is about 1.47 to 1.49, which is close to the refractive index of this type of silica, whereby a good transparency is obtained.

Further usable precipitated silica types are et al SIPERNAT 310, 350 and 500, AEROSIL classes (trademarks of Degussa-Huls AG), and SYLOID types (Trademark of Grace Co.).

An ink receiving layer containing a porous alumina pigment such as MARTINOX GL-1 is not made completely transparent when impregnated with a UV-curable varnish because its refractive index is 1.6. On the other hand, at Impregnation of an ink-receptive layer containing this pigment with a UV-curable varnish achieves substantially better adhesion between the support and the ink-receiving layer.

Except the The above-described essential ingredients may be incorporated in the ink receiving layer embedded as a cationic cationic substance. By using such substances, the layer is better in the Able to fix and hold the dye of the ink drops. A particularly suitable compound is a poly (diallyldimethylammonium chloride) or abbreviated a poly (DADMAC). These connections are through different companies available, e.g. Aldrich, Nalco, CIBA, Nitto Boseki Co., Clariant, BASF and EKA Chemicals.

Other useful cationic compounds include DADMAC copolymers such as copolymers with acrylamide, eg NALCO 1470, trademark of ONDEO Nalco, or PAS-J-81, trademark of Nitto Boseki Co., copolymers of DADMAC with acrylates such as Nalco 8190, trademark of ONDEO Nalco, copolymers of DADMAC with SO ₂ , such as PAS-A-1 or PAS-92, trademark of Nitto Boseki Co., a copolymer of DADMAC with maleic acid, eg PAS-410, trademark of Nitto Boseki Co., a copolymer of DADMAC with diallyl (3-chloro-2-hydroxypropyl) amine hydrochloride, eg PAS-880, trademark of Nitto Boseki Co., dimethylamine-epichlorohydrin copolymers, eg Nalco 7135, trademark of ONDEO Nalco, or POLYFIX 700, trademark of Showa High Polymer Co., other useful Polyfix classes such as POLYFIX 601, POLYFIX 301, POLYFIX 301A, POLYFIX 250WS and POLYFIX 3000, NEOFIX E-117, trademark of Nicca Chemical Co. for a polyoxyalkylene polyamine dicyandiamine, REDIFLOC 4150, trademark of EKA Chemicals for a polyamine , m MADAME (methacrylate dimethylamine ethyl = dimethylamine ethyl methacrylate) or MADQUAT (methacryloxyethyl trimethyl ammonium chloride) modified polymers, eg ROHAGIT KL280, ROHAGIT 210, ROHAGIT SL144, PLEX 4739L and PLEX 3073 from Rohm, DIAFLOC KP155 and other DIAFLOC products from Diafloc Co., BMB 1305 and other BMB Products from EKA Chemicals, cationic epichlorohydrin adducts such as POLYCUP 171 and POLYCUP 172, trademarks of Hercules Co., CYPRO products, eg CYPRO 514/515/516 and SUPERFLOC 507/521/567 from Cytec Industries, cationic acrylic polymers such as ALCOSTAT 567, trademarks of CIBA, cationic cellulose derivatives such as CELQUAT L-2OO, H-100, SC-240C and SC-230M, trademarks of Starch & Chemical Co., QUATRISOFT LM200, UCARE polymers such as JR125, JR400, LR400, JR30M and LR30M and UCARE polymer LK, PALSET JK-512, PALSET JK512L, PALSET JK-182, PALSET JK-220, WSC-173, WSC-173L, PALSET JK-320, PALSET JK-320L and PALSET JK-350 , all fixatives from Chukyo Europe, polyethyleneimine and Copolymers, eg LUPASOL, trademark of BASF AG, triethanolamine thiocyanate, eg TYZOR, trademark of Du Pont Co., copolymers of vinylpyrrolidone such as VIVIPRINT 111, trademark of ISP, methacrylamidepropyldimethylamine copolymer with dimethylamine ethyl methacrylate such as COPOLYMER 845 and COPOLYMER 937, trademark of ISP, and with vinylimidazole, eg LUVIQUAT CARE, LUVITEC 73W, LUVITEC VPI55 K18P, LUVITEC VP155 K72W, LUVIQUAT FC905, LWIQUAT FC550, LUVIQUAT HM522 and SOKALAN HP56, all trademarks of BASF AG, polyamidoamines, eg RETAMINOL and NADAVIN, trademarks of Bayer AG, phosphonium compounds like the in EP 609 930 and cationic polymers such as NEOFIX RD-5, trademark of Nicca Chemical Co.

The The ink-receptive layer may further include well-known conventional ones Ingredients such as surfactants used as pouring additives, hardeners, plasticizers, whiteners and matting agents.

Suitable surfactants are all cationic, anionic, amphoteric and nonionic surfactants described in JP-A 62-280068 (1987). Examples of surfactants are N-alkylamino acid salts, alkylether carboxylic acid salts, acylated peptides, alkylsulfonic acid salts, alkylbenzenesulfonic acid salts and alkylnaphthalenesulfonic acid salts, sulfosuccinic acid salts, α-olefinsulfonic, N-Acylsulfon acid salts, sulfonated oils, alkylsulfonic acid salts, Alkylethersulfonsäuresalze, Alkylallylethersulfonsäuresalze, Alkylamidsulfonsäuresalze, alkylphosphoric acid salts, Alkyletherphosphorsäuresalze, Alkylallyletherphosphorsäuresalze, alkyl and Alkyl allyl polyoxyethylene ethers, alkyl allyl formaldehyde fused acid salts, alkyl allyl ether sulfonic acid salts, alkyl amide sulfonic acid salts, alkyl phosphoric acid salts, alkyl ether phosphoric acid salts, alkyl allyl phosphoric acid salts, alkyl and allyl polyoxyethylene ethers, alkylallyl formaldehyde fused polyoxyethylene ethers, block polymers with polyoxypropylene, polyoxyethylene polyoxypropyl alkyl ethers, polyoxyethylene ethers of glycol esters, polyoxyethylene ethers of sorbitan esters, top lyoxyethylene ethers of sorbitol esters, aliphatic acidic polyethylene glycol esters, glycerol esters, sorbitan esters, propylene glycol esters, sugar esters, fluoro-C ₂ -C ₁₀ -alkylcarboxylic acids, disodium N-perfluorooctanesulfonylglutamate, sodium 3- (fluoroC ₆ -C ₁₁ -alkyloxy) -1- C ₃ -C ₄ -alkylsulfonates, sodium 3- (ω-fluoro-C ₆ -C ₈ -alkanoyl-N-ethylamine) -1-propanesulfonates, N- [3- (perfluorooctanesulfonamide) -propyl] -N, N- dimethyl-N-carboxymethyleneammonium betaine, fluoro-C ₁₀ -C ₂₀ -alkylcarboxylic acids, perfluoro-C ₇ -C ₁₃ -alkylcarboxylic acids, perfluorooctanesulfonic acid diethanolamide, Li, K and Na-perfluoro-C ₇ -C ₁₂ -alkyl sulfonates, N-propyl N- (2-hydroxye ethyl) perfluorooctane sulfonamide, perfluoro C ₆ -C ₁₀ alkylsulfonamidopropylsulfonylglycinate, bis (N-perfluorooctylsulfonyl-N-ethanolaminoethyl) phosphonate, monoperfluoroC ₆ -C ₁₆ -alkylethylphosphonates and perfluoroalkylbetaine.

To usable cationic surfactants include N-alkyldimethylammonium chloride, Palmityltrimethylammonium chloride, dodecyldimethylamine, tetradecyldimethylamine, an ethoxylated alkylguanidineamine complex, oleamine hydroxypropylbistrimonium chloride, oleylimidazoline, Stearyl imidazoline, cocamine acetate, palmitamine, dihydroxyethyl cocamine, Cocotrimonium chloride, alkyl polyglycol ether ammonium sulfate, ethoxylated Oleamine, laurylpyridinium chloride, N-oleyl-1,3-diaminopropane, stearamidopropyldimethylamine lactate, coconut fatty acid amide, Oleylhydroxyethylimidazoline, isostearylethylimidonium ethosulfate, lauramidopropyl PEG-dimonium chloride phosphate, palmityltrimethylammonium chloride and cetyltrimethylammonium bromide.

Particularly useful is described eg in US-P 4,781,985 fluorocarbon surfactant of the formula F (CF _{2) 4-9} CH ₂ CH ₂ SCH ₂ CH ₂ N ⁺ R ₃ X ^-, in which R is a hydrogen atom or an alkyl group means, and the method described in US-P 5,084,340 fluorocarbon surfactant of the formula CF ₃ (CF _{2) m} CH ₂ CH ₂ O (CH ₂ CH ₂ O) _n R, in which m = 2 to 10, n = 1 to 18 and R represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms. These surfactants are available from DuPont and 3M. The ratio of the surfactant component in the ink receiving layer is generally between 0.1 and 2 wt .-%, preferably between 0.4 and 1.5 wt .-% and is very particularly preferably 0.75 wt .-%, based on the total dry weight of the layer.

The Ink-receiving layer can be crosslinked to desired properties like water resistance and avoiding sticking together. By networking the layer is further rendered abrasion resistant and protected from while handling fingerprints to remain on the element. There are a variety of known, also known as curing crosslinking agents, which crosslink the film-forming binders. Hardeners can be singly or in combination and be used in free or blocked form. There is a wide Selection of usable according to the invention Hardeners. These include Formaldehyde and free dialdehydes such as succinaldehyde and glutaraldehyde, blocked dialdehydes, active esters, sulfonate esters, active halogen compounds, Isocyanate or blocked isocyanates, polyfunctional isocyanates, Melamine derivatives, s-triazines and diazines, epoxides, active olefins with two or more active bonds, carbodiimides, zirconium complexes, e.g. BACOTE 20, ZIRMEL 1000 or zirconium acetate, trademark of MEL Chemicals, titanium complexes, such as DuPont's TYZOR classes, isoxazolium salts substituted in the 3-position, esters of 2-alkoxy-N-carboxydihydroquinoline, N-carbamoylpyridinium salts, hardener with mixed function such as halogen-substituted aldehyde acids (e.g. Mucochloric and mucobromic acids), oniumsubstituierte Acroleine and vinyl sulfones and polymeric hardeners, such as dialdehyde and a copolymer of acrolein and methacrylic acid, polymers having an oxazoline function such as. the EPOCROS WS-500 series and the EPOCROS K-1000 series, and maleic anhydride copolymers, e.g. GANTREZ AN119.

The Ink-receiving layers and any additional layers of the present Invention can also a plasticizer such as ethylene glycol, diethylene glycol, Propylene glycol, polyethylene glycol, glycerol monomethyl ether, glycerol monochlorohydrin, Ethylene carbonate, propylene carbonate, tetrachlorophthalic anhydride, tetrabromophthalicanhydride, Urea phosphate, triphenyl phosphate, glycerol monostearate, propylene glycol monostearate, tetramethylene sulfone, N-methyl-2-pyrrolidone and N-vinyl-2-pyrrolidone included.

The Ink-receiving layers and any additional layers may also be used Contain ingredients that improve the lightfastness of the print image, such as antioxidants, UV absorbers, peroxide scavengers, singlet oxygen quencher such as HALS compounds (Hindered Amine Light Stabilizers) etc. As UV absorbers are stilbene compounds prefers.

UV-curable coating composition

Main components the UV curable to be applied to the ink receiving layer photopolymerizable composition are a monomer and a photoinitiator.

A variety of photopolymerizable and photocrosslinkable compounds can be used in the present invention. Suitable monomers include, for example, those described in DE-OS 4005231, 3516256, 3516257 and 3632657 and in US 4,629,676 described monomers, unsaturated polyol esters, especially those esters of α-methylenecarboxylic acids, for example ethylene diacrylate, glycerol tri (meth) acrylate, diethylene glycol di (meth) acrylate, 1,3-propanediol di (meth) acrylate, 1,2,4-butanetriol tri (meth) acrylate , 1,4-cyclohexanediol di (meth) acrylate, 1,4-benzenediol di (meth) acrylate, pentaerythritol tetra (meth) acrylate, pentaerythritol triacrylate, dipentaerythritol pentaacrylate, trimethylolpropane triacrylate, 1,5-pentadioldi (meth) acrylate, the bisacrylates and bismethacrylates of polyethylene glycols a molecular weight between 200 and 500, unsaturated amides, especially those of α-methylene carboxylic acids, and in particular those of α, ω-diamines and ω-diamines interrupted by an oxygen atom, such as methylenebisacrylamide, methylenebismethacrylamide, 1,6-hexamethylenebisacrylamide, diethylenetriaminetrismethacrylamide, bis (γ-methacrylamidopropoxy) ethane, β-methacrylamidoethylmethacrylate, N- ( β-hydroxyethyl) -β- (methacrylamido) -ethyl acrylate and N, N-bis (β-methacrylolyoxyethyl) -acrylamide, vinyl esters, eg divinylsuccinate, divinyl adipate, divinyl phthalate, divinylbutane-1,4-disulfonate, and unsaturated aldehydes, eg sorbaldehyde (hexadienal).

The photopolymerizable composition may also be polymers and / or Oligomers with two or more different polymerizable functions contained, e.g. acrylated epoxies, polyester acrylates, urethane acrylates etc.

When Monomers can also be monofunctional (meth) acrylic esters provided they are not volatile and do not spread undesirable Odor. Suitable compounds are i.a. n-octyl acrylate, decyl acrylate, Decyl methacrylate, stearyl acrylate, stearyl methacrylate, cyclohexyl acrylate, Cyclohexyl methacrylate, phenylethyl acrylate and phenylethyl methacrylate.

goose particularly preferred compounds contain one or more groups with a (meth) acrylate function.

Other classes of photopolymerizable compounds containing one or more (meth) acrylate groups are reactive, polyfunctional, as in EP 502 562 described monomers.

When suitable photoinitiators is a great diversity for this one Purpose of known compounds or combinations of compounds to call. Examples are benzoin ethers, benzil ketals, polycyclic ones Quinones, benzophenone derivatives, triarylimidazolyl dimers and radiation-sensitive Trihalomethyl compounds, for example trichloromethyl-s-triazines. Preferred are 2,3-bisarylquinoxalines as described in US-A 3,765,898, and 2-aryl-4,6-bistrichloromethyl-s-triazines. The amount of photoinitiator or photoinitiator combination is usually between 1% by weight and 25% by weight, preferably between 5% and 15% by weight.

The UV-curable Composition can also be a small amount of a premature polymerization before the UV curing step contraceptive Thermopolymerization inhibitor included. Examples of such Hemmer are u.a. p-methoxyphenol, hydroquinone, aryl- or alkyl-substituted hydroquinone, t-butyl-catechol, pyrogallol, cuprous chloride, phenothiazine, Chloranil, naphthylamine, α-naphthol, 2,6-di-t-butyl-p-cresol, etc. A preferred polymerization inhibitor is 2-methylhydroquinone. The thermopolymerization inhibitors are preferably in an amount of between 0.001 and 5 parts by weight per 100 parts of monomer used.

The Optionally, composition may also be a small amount of one organic solvent, e.g. Ethyl acetate.

The below, commercially available compounds (chemical names and trade names) can be used with good results the UV-curable invention Composition used (non-limiting list).

Photopolymerizable monomers / oligomers

• (chemical name, type and supplier)

• Pentaerythritol triacrylate, SR-444 (Sartomer)
• Trimethylolpropane triacrylate, SR-351 (Sartomer)
• - dipropylene glycol diacrylate, SR-508 (Sartomer)
• - amine-modified Polyether Acrylate Oligomer, CN-501 (Sartomer)
• Isobornyl acrylate, SR-506 (Sartomer)
• Diethylene glycol divinyl ether, RAPI-CURE DVE-2 (ISP)
• Triethylene glycol divinyl ether, RAPI-CURE DVE-3 (ISP)
• Urethane acrylate / 2 (2-ethoxyethoxy) ethyl acrylate mixture (SR-256), CN-966H90 (Sartomer)
• Polybutadiene dimethyl acrylate, CN-301 (Sartomer)
• - low viscosity Oligomer, CN-135 (Sartomer)
• - low viscosity Oligomer, CN-137 (Sartomer)

photoinitiators

• - IRGACURE 907 (by Ciba-Geigy Co.)
• - NOVOPOL PI3000 (from Rahn Co.)
• - GENOCURE DEAP (by Rahn Co.)
• - IRGACURE 184 (by Ciba-Geigy Co.)
• - EZRCURE KK (by Fratelli Lamberti Co.)
• - IRGACURE 500 (from Ciba-Geigy Co.)
• - IRGACURE 819 (by Ciba-Geigy Co.)

To The above description of the main ingredients will now be in the Individually the different steps of the method according to the invention describe.

In a most preferred embodiment, the web or sheet information carrier is printed with a first set of information prior to application of an ink receptive layer. This first information set is preferably information and / or security printing. This general information can be for example the name, the abbreviation or the Include the logo of the issuing authority. For example, the security print may include a concrete recognizable subject or an abstract, regularly repeating monochrome or multicolor pattern, or a gradual changing color pattern whose hue and / or density of colors change gradually, thereby being difficult to fake. The spectral properties of the printing inks of the security printing are preferably chosen so that they are difficult to copy with a commercially available color copier.

These general information or security printing can after a Any known printing technique, e.g. by letterpress, lithographic printing, gravure printing, screen printing, etc. A preferred Technique is driographic pressure, which is an anhydrous variant of lithographic printing, in which no fountain solution on the Printing press is used.

is the information carrier later into a variety of identity cards the printed general information and / or the printed security print pattern repeated in a repeating process printed on several areas of the web or the sheet, so several identical To get items.

Subsequently, will an ink receiving layer having the detail described above Composition attached to the information carrier. This ink receiving layer can after a conventional Coating technology, such as dip coating, knife coating, Extrusion coating, spin coating, cascade coating and Curtain coating, on the carrier be attached.

In an alternative embodiment the first set of information is also applied to this ink receiving layer and not on the hard carrier appropriate.

One An essential feature of the present invention is that this ink receiving layer by means of an ink jet printer with a digitally stored second, to the first information set different information set is printed. In a whole particularly preferred embodiment is this other type of information personalized? Information for each individual element on the information carrier is different is. By way of example, this personalized information can be used a unique, the future Cardholder assigned card number, the expiration date of validity the card, personal data of the future holder of the card, e.g. the birthday, and / or a photograph.

Of the Ink jet printing process can be done by various methods become. In a first type of process, the generation of a continuous droplet stream according to a pressure wave pattern. This method is known as a high pressure process. In a first embodiment, the droplet stream becomes in droplets that electrostatically charged, deflected and collected again, and in droplets, remain uncharged, continue to fly in a straight line and create the image, dissolved. In another embodiment The charged deflected droplet stream forms the picture and becomes the uncharged, undeflected stream of droplets collected again. In this variant of high-pressure ink jet method are various Distracted beams at different angles and draw like that the picture on (multiple deflection system).

To a second method the ink droplets are generated "on demand" ("DOD" method or "drop on demand" method), wherein the printing device the droplets only emits when they serve to image on a receiving element. Thereby becomes the complexity charging the drops, distracting hardware and resampling the ink avoided. Drop-on-demand can be ink drop generation by a mechanical movement of a piezoelectric Transducer generated pressure wave (the so-called piezoelectric method) or by discrete heat shocks (the so-called "bubble Jet "method or" Thermal Jet "method) become.

• – wässrige Tintenzusammensetzungen: der Trocknungsmechanismus umfasst Absorption, Durchdringung und Verdampfung,
• – ölige Tintenzusammensetzungen: der Trocknungsmechanismus umfasst Absorption und Durchdringung,
• – Tintenzusammensetzungen auf Lösungsmittelbasis: der Trocknungsmechanismus beruht hauptsächlich auf Verdampfung,
• – Heißschmelz- oder Phasenwechseltintenzusammensetzungen: das Bindemittel der Tinte ist flüssig bei Ausstoßtemperatur, aber fest bei Zimmertemperatur, keine Trocknung aber Erstarrung,
• – UV-härtbare Tintenzusammensetzungen: keine Trocknung aber Polymerisation.

Inkjet printing ink compositions typically contain the following ingredients: dyes or pigments, water and / or organic solvents, humectants such as glycols, detergents, thickeners, polymeric binders, preservatives, etc. It will be understood that the optimum composition of such an ink is applied ink jet printing method and depends on the nature of the substrate to be printed. Ink compositions can be roughly divided into the following categories:

• Aqueous ink compositions: the drying mechanism includes absorption, permeation and evaporation,
• Oily ink compositions: the drying mechanism includes absorption and permeation,
• Solvent-based ink compositions: the drying mechanism is mainly based on evaporation,
• Hot melt or phase change ink compositions: the binder of the ink is liquid at ejection temperature but solid at Zim mertemperatur, no drying but solidification,
• UV-curable ink compositions: no drying but polymerization.

The Colorants contained in the inkjet ink can be molecularly dyes dissolved in the ink liquid be, e.g. Acid dyes, bound by a cationic mordant in the ink receiving element be, or finely divided, dispersed in the ink liquid pigments.

In a following step is applied to the layer arrangement thus obtained, containing both information sets a UV-curable Paint applied with the composition described in detail above, sprayed or spin-coated. The impregnation the ink receiving layer with the paint composition makes the Ink receiving layer gradually substantially transparent. As explained at the beginning, the transparency will be the better the closer the refractive indices are the paint composition and the pigment in the ink receiving layer lie together.

The Penetration time of the paint in the layer can be achieved by the following measures be shortened: Lowering the viscosity of varnish by increase the temperature or by adding a diluent monomer such as isobornyl acrylate or by minimizing the ratio the amount of polymeric binder to the amount of pigment in the ink-receiving layer. Further, the penetration time also becomes with increasing porosity of the ink receiving layer lose weight.

The applied lacquer layer can completely cover the information carrier, causing all individual elements over their overall surface become transparent and the first set of information completely visible becomes. Every item on the information carrier can only partially or even pattern-wise impregnated, whereby the first information set only partially or pattern visible becomes. In the latter case, the appropriate, transparent becoming Pattern itself represent some type of general information or even serve as a special kind of watermark. In this case, the first information set optionally be omitted.

In a preferred embodiment will follow on the thus obtained arrangement before curing a transparent, optional laminated with a third set of information printable protective film. As a protective film is a thin Polyethylene terephthalate film preferred.

Finally will the finished layer composite cured by ultraviolet radiation. Devices for radiation curing are known to the experts and commercially available. For example the hardening with a medium pressure mercury vapor lamp with or without electrodes or with pulse xenon tubes. These ultraviolet sources are usually with a cooling system equipped and have a Ozone removal device and optionally over a nitrogen inlet to the surface of the product to be cured while the radiation treatment to vent. As a rule, a lamp strength between 40 and 240 W / cm in the range between 200 and 400 nm. An example for a commercial one is electrodeless mercury vapor medium pressure ultraviolet lamp the model VPS / I600 curing system from Fusion UV Systems Ltd., United Kingdom. A pulse xenon flash tube is commercially available by IST Strahlentechnik GmbH, Nürtingen, Germany. The fusion model also works the use of metal halide doped mercury vapor glow lamps or XeCl glow lamps, each with their specific UV emission spectrum. These lamps allow greater freedom when assembling the curing composition a more appropriate curing is each by using the lamp with the most suitable spectral Get properties.

The hardening causes a substantial improvement in the cohesive force of the ink receiving layer and the adhesion between the ink receiving layer and the support. The while achieving high durability against mechanical and chemical influences makes the information carrier tamper-proof.

In a preferred embodiment becomes the finished information carrier by means of a known Scheidemittels into several individual elements tailored to the appropriate dimensions of an ID card. The Most current types of ID cards have standardized dimensions of 85.6 mm × 54.0 mm × 0.76 mm up. This final strength can by heat lamination one or more polymeric films, e.g. PVC films are achieved.

ever on the type of information contained in the various information sets can the final ID card as identity card, Security card, driving license card, Social security card, bank card, membership card, time card, Payment card, credit card, etc. serve.

Except the As described above, the finished ID card can be even more Security elements or information carriers such as a hologram, a Magnetic strip or a chip ("smart cards") included.

The The present invention will now be apparent from the following examples illustrated but not limited thereto.

EXAMPLES

example 1

• – 18,7 g Kieselsäure SIPERNAT 570 (Degussa Co.),
• – 2,7 g silanolmodifizierter Polyvinylalkohol POVAL R-3109 (Kuraray Co.),
• – 1,7 g CAT-FLOC T2 (Calgon Europe N.V.),
• – 0,03% eines Biozids,
• – 0,03% Zitronensäure und
• – 55,14 g Wasser.

A dispersion A is prepared by adding the following ingredients:

• 18.7 g of silica SIPERNAT 570 (Degussa Co.),
• 2.7 g of silanol-modified polyvinyl alcohol POVAL R-3109 (Kuraray Co.),
• 1.7 g of CAT-FLOC T2 (Calgon Europe NV),
• - 0.03% of a biocide,
• - 0.03% citric acid and
• - 55.14 g of water.

• – 9,4 g Wasser,
• – 9,9 g eines Ethylenvinylacetat-Copolymerlatex, VINNAPAS EP1 (Air Products & Chem.), in Form einer 50%igen wässrigen Dispersion,
• – 0,4 g Poly(diallyldimethylammoniumchlorid) CAT FLOC-T2 (Calgon Europe N.V.),
• – 78,3 g Dispersion A und
• – 2 g des Tensids Cetyltrimethylammoniumbromid.

This dispersion is used to prepare the ink-receiving layer composition containing the following ingredients:

• - 9.4 g of water,
• 9.9 g of an ethylene-vinyl acetate copolymer latex, VINNAPAS EP1 (Air Products & Chem.), In the form of a 50% aqueous dispersion,
• 0.4 g of poly (diallyldimethylammonium chloride) CAT FLOC-T2 (Calgon Europe NV),
• - 78.3 g of dispersion A and
• - 2 g of the surfactant cetyltrimethylammonium bromide.

The support is a white opaque polyvinylchloride (PVC) support 165 microns thick which is printed by driographic printing with a security print consisting of a gradual changing color pattern. The ink receiving layer composition is applied to this support in a ratio of 120 g / m ² and dried in air. Thereafter, the ink-receiving layer is printed by means of an EPSON STYLUS COLOR 900 ink jet printer with multiple sets of digitally stored personalized information.

• – 34,4% aminmodifiziertes Polyetheracrylatoligomer CRAYNOR 501 (= CN501) (von Sartomer Co.),
• – 51,6% Dipropylenglycoldiacrylat (DPGDA),
• – 2% Ethylacetat,
• – 2% einer 10%igen Lösung von Methylhydrochinon in CN501/DPGDA 40/60 und
• – 10% Fotoinitiator IRGACURE 907 (Ciba-Geigy Co.).

The resulting image bearing assembly is then overcoated with a UV curable clearcoat containing the following ingredients:

• 34.4% amine-modified polyether acrylate oligomer CRAYNOR 501 (= CN501) (from Sartomer Co.),
• 51.6% dipropylene glycol diacrylate (DPGDA),
• 2% ethyl acetate,
• - 2% of a 10% solution of methylhydroquinone in CN501 / DPGDA 40/60 and
• 10% photoinitiator IRGACURE 907 (Ciba-Geigy Co.).

The Layer is coated with a 70 μm Braive squeegee applied. About two minutes after the order of the solution is the layer on a with a VPS / 1600 UV lamp (240 W / cm, speed 33.5 cm / s) DRSE-120 conveyor belt hardened. For one full hardening are two passes required. After complete penetration of the UV-curable Lacks the ink-receiving layer is completely transparent and the underlying driographic security printing has become clearly visible.

Example 2

One matt clear PVC carrier is coated with the same ink receiving layer composition as in Example 1 coated. After drying, the ink receiving layer becomes through driographic printing using a Presstek Pearl Dry printing plate on an AB Dick 9860 press with a "Reflecta Magenta Dry" printing ink from Holstmann / Steinberg existing security print pattern printed. After imprinting this Security printing is done using an EPSON STYLUS COLOR 900 inkjet printer various personalized information printed.

The thus obtained image bearing arrangement is coated with the same UV-curable Lacquer coated as in Example 1, wherein the opaque ink receptive layer completely becomes transparent. The driographically imprinted image is subtractive visible through the inkjet image.

Examples 3 and 4

The Examples 1 and 2 are repeated, but with the following additional Steps. Before UV curing becomes a 23 μm strong PET protective film on the image-bearing arrangement laminated. After curing, the finished information carrier is in several Cropped ID cards with the dimensions 85.6 mm × 54.0 mm × 0.76 mm.

The finished ID cards are waiting with a high mechanical and chemical Stability on and are forgery-proof.

Example 5

The Ink receiving layer composition of Example 1 is applied to a white, opaque polyvinyl chloride with a strength of 165 microns applied. This carrier is used in advance by driographic printing as security pressure serving, gradually changing Printed on color samples. The wet film thickness of this ink receiving layer is 60 μm. To Drying is printed on the ink receiving layer using an EPSON STYLUS COLOR 900 inkjet printer with a set of digitally stored personal information, such as a Photograph, name, address, birthday, place of birth, an identification number, etc.

The image-bearing arrangement thus obtained is then overprinted twice in the register according to a pattern (eg the word BELGIUM) by screen printing with the UV curable lacquer composition used in Example 1. A monofilament polyester film available from NBC having a fineness of 120 threads / cm is used. The UV varnish is capable of penetrating the opaque ink receiving layer and makes it transparent within about 1 minute of application. Subsequently, a transparent PET protective film (thickness 100 μm) is laminated onto the UV-curable lacquer layer. Finally, the assembly is exposed to UV light on a DRSE-120 conveyor belt equipped with a VPS / 1600 UV lamp (240 W / cm - speed 20 cm / s). The underlying driographic security printing is clearly visible only in areas where the paint is localized, and clearly reflects the attached pattern (eg the word BELGIUM).

Example 6

This Example is similar to the previous example, but with the difference that the PVC carrier is not provided with a security print and the paint composition in pattern form a motif is attached. In the finished picture represents the transparent Motive a kind of watermark

Claims (18)

One by one through the steps below characterized method for producing a tamper-proof information carrier (1) Providing a double-layered arrangement which (i) has a hard signature support or railway carrier and (ii) a porous one opaque, contains an ink receiving layer containing a pigment and a binder, wherein either the surface of the carrier or the surface the opaque Layer contains a first set of printed information, (2) Printing a second set of information different from the first set on the porous opaque Ink receiving layer by ink jet printing, (3) full-surface, part-area or pattern application, Printing, spraying or spin-coating a UV-curable Paint composition on the thus obtained arrangement, wherein the penetration of the varnish in the porous opaque Ink receptive layer makes this layer substantially transparent and the refractive indices of the pigment and the UV-curable Lacks at most 0.13 apart, and (4) Curing the paint composition through full-surface Irradiation with ultraviolet radiation, with both the adhesion between the carrier and the ink receiving layer as the cohesive strength of the ink receiving layer be improved. The method of claim 1, which includes the additional Step (3bis), in which between step (3) and step (4) a transparent, possibly a third set of printed Information-carrying protective film on the obtained after step (3) Arrangement is laminated. Method according to claim 1 or 2, which comprises the additional Step (5), in which the finished assembly in a set is tailored by several identification cards. Method according to claim 3, characterized that the identification card, depending on the nature of the various printed information sets an identity card, a security card, a driving license card, a social security card, a membership card, a time card, a bank card, a payment card or a credit card. Method according to claim 4, characterized in that that the first set of printed information through driographic Pressure is applied. Method according to one of claims 1 to 5, characterized that the second set of inkjet-printed information personalized Information is. Method according to Claim 6, characterized that the personalized information is a photograph and / or personal Data is about. Method according to one of claims 1 to 7, characterized that the hard web or sheet carrier polyvinyl chloride or polyethylene terephthalate is. Method according to one of claims 1 to 8, characterized the pigment in the opaque porous ink receiving layer inorganic pigment is. Method according to claim 9, characterized in that that the inorganic pigment is silica. Method according to one of claims 1 to 10, characterized that the UV-curable lacquer composition a photopolymerizable monomer or oligomer and a photoinitiator contains. Method according to claim 11, characterized in that the photopolymerizable monomer or oligomer is an acrylate monomer is. A method according to claim 11, characterized in that the photopolymerizable mono or oligomer is an amine-modified polyether acrylate oligomer. Method according to one of claims 1 to 13, characterized that the viscosity the UV-curable Paint composition is less than 500 mPa · s. One by one through the steps below characterized method for producing a tamper-proof information carrier (1 ') Provide a double-layered arrangement comprising (i) a hard sheet carrier or web support and (ii) a porous one opaque, contains an ink receiving layer containing pigment and a binder, (2 ') Print a first Type of information on the porous opaque Ink receiving layer by ink jet printing, (3 ') application, printing, spray on or spin-coating a UV-curable Paint composition on the thus obtained arrangement according to a predetermined pattern, wherein the penetration of the paint into the porous opaque ink-receiving layer this Layer patternwise essential transparent and the refractive indices of the pigment and the UV-curable Lacks at most 0.13 apart, and (4 ') cure the paint composition by full-surface irradiation with ultraviolet radiation, wherein both the adhesion between the carrier and the ink receiving layer as the cohesive strength of the ink receiving layer be improved in terms of pattern. A method according to claim 15, which includes the additional Step (3bis') in which between step (3 ') and step (4') a transparent, optionally a second set of printed information-carrying protective film is laminated on the arrangement obtained after step (3). A method according to claim 15 or 16, which comprises the additional Step (5 ') comprises in which the finished assembly into a set of multiple identification cards is tailored. Method according to one of claims 15 to 17, characterized that the first type of information is personalized information and the given pattern provides another type of information the group consisting of general information and a watermark represents.