Optical card comprising an imaged layer

According to the present invention there is provided an imaged element comprising an optical card and underneath a layer package comprising in the order given an optional image receiving layer, a prelayer, an interlayer and a transparent support, at least the optional image receiving layer or the prelayer comprising an image, characterized in that the interlayer contains a polyurethane and a cross-linking agent.

FIELD OF THE INVENTION
 The present invention relates to an optical card comprising an imaged
 layer.
 More specifically the invention is related to an optical card comprising an
 imaged layer containing an identification mark of the bearer.
 BACKGROUND OF THE INVENTION
 In recent years, with the progress of information-oriented society, a large
 number of optical recording media and recording-reproducing device of
 information have been proposed which perform recording, reproduction of
 optical information such as optical disc, optical card, optical tape, etc.
 as the means for dealing with a diversity of information. In optical
 recording media, there has been known one in which the information formed
 into binary value can be detected by conversion into change in reflectance
 or change in intensity of the reflected light accompagnied with the
 surface shape such as presence of pit (concavity). Such optical recording
 medium is constituted of a preformat signal and a guide groove previously
 provided on a substrate according to the 2P method, compression molding,
 cast molding, etc, an amorphous thin film of a dye or pigment such as
 cyanine type or polymethine type, TeO.sub.x, chalcogen, etc, coated of
 vapor deposited thereon as the optical recording layer capable of
 recording and reproduction with light, and further a protective substrate
 for protection of the above optical recording layer laminated thereon, if
 desired.
 Among such optical recording media, an optical card has dimensions of, for
 example, 85,4 mm.times.54,0 mm.times.0.76 mm and is excellent in
 ortability. Said optical cards are intended for use in various
 applications such as divers type of identification operations. Therefore
 it is desirable that said cards contains a visual personified mark of the
 be arer of said card.
 Said optical cards should have, when used for identification purpose,
 besides a number of security marks, also a visually discernible number of
 data and also bear a photograph of the owner.
 OBJECTS OF THE INVENTION
 It is an object of the present invention to provide a material having on an
 optical card a visual personified mark of the owner. It is a further
 object of the invention to provide a material having on an optical card a
 visual personified mark of the owner that is protected by a transparent
 support, preferably a subbed polyethylene terephthalate layer
 It is a further object of the invention to provide a material with a long
 lifespan having on an optical card a visual personified mark of the owner.
 SUMMARY OF THE INVENTION
 According to the present invention there is provided an imaged element
 comprising an optical card and underneath a layer package comprising in
 the order given an optional image receiving layer, a prelayer, an
 interlayer and a transparent support, at least the optional image
 receiving layer or the prelayer comprising an image, characterized in that
 the interlayer contains a polyurethane and a cross-linking agent.
 DETAILED DESCRIPTION OF THE INVENTION
 An optical card according to the invention comprises an optical recording
 medium, a support, preferably a non-transparent support and on the
 opposite of the support an adhesive layer, preferably a polyethylene
 layer, preferably with a thickness between 20 and 40 .mu.m. Preferably
 said optical card contains a covering layer on the optical recording
 medium opposite the support.
 According to one embodiment of the invention said optical card is laminated
 on the side containing the adhesive layer to a layer package comprising in
 the order given an image receiving layer, a prelayer, an interlayer, a
 transparent support, preferably a subbed biaxially oriented polyethylene
 terephthalate, a subbed biaxially oriented polyethylene naphthalate or a
 polycarbonate,layer and a protective layer.
 In accordance with the invention a visual personification in the form of
 one or more images is formed by the diffusion transfer process
 (DTR-process) wherein the image-wise transfer of dye(s) or silver
 halogenide is controlled by the development of (a) photo-exposed silver
 halide emulsion layer(s), and wherein dye(s)or silver halogenide is (are)
 transferred imagewise in a special image receiving layer.
 Dye diffusion transfer reversal processes are based on the image-wise
 transfer of diffusible dye molecules from an image-wise exposed silver
 halide emulsion material into a waterpermeable image-receiving layer
 containing a mordant for the dye(s). The image-wise diffusion of the
 dye(s) is controlled by the development of one or more image-wise exposed
 silver halide emulsion layers, that for the production of a multicolor
 image are differently spectrally sensitized and contain respectively a
 yellow, magenta and cyan dye molecules. A survey of dye diffusion transfer
 imaging processes has been given by Christian C. Van de Sande in Angew.
 Chem. - Ed. Engl. 22 (1983) n.degree. 3, 191-209 and a particularly useful
 process is described in U.S. Pat. No. 4,496,645.
 For use in dye diffusion transfer photography the type of mordant chosen
 will depend upon the dye to be mordanted. If acid dyes are to be
 mordanted, the image-receiving layer being a dye-mordanting layer contains
 basic polymeric mordants such as polymers of amino-guanidine derivatives
 of vinyl methyl ketone such as described in U.S. Pat. No. 2 882 156, and
 basic polymeric mordants and derivatives, e.g. poly-4-vinylpyridine, the
 metho-p-toluene sulphonate of poly-2-vinylpyridine and similar compounds
 described in U.S. Pat. No. 2 484 430, and the compounds described in DE-A-
 2 009 498 and 2 200 063.
 Other mordants are long-chain quaternary ammonium or phosphonium compounds
 or ternary sulphonium compounds, e.g. those described in U.S. Pat. No.
 3,271,147 and 3,271,148, and cetyltrimethyl-ammonium bromide. Preferred
 are polyurethane and/or cationic polyurethane mordanting polymers. Certain
 metal salts and their hydroxides that form sparingly soluble compounds
 with the acid dyes may be used too. The dye mordants are dispersed or
 molecularly divided in one of the usual hydrophilic binders in the
 image-receiving layer, e.g. in gelatin, polyvinylpyrrolidone or partly or
 completely hydrolysed cellulose esters.
 In U.S. Pat. No. 4,186,014 cationic polymeric mordants are described that
 are particularly suited for fixing anionic dyes, e.g. sulphinic acid salt
 dyes that are image-wise released by a redox-reaction described e.g. in
 EP-A- 004 399 and U.S. Pat. No. 4 232 107.
 Said mordanting agents are present in the dye diffusion image receiving
 layer preferably in an amount ranging from 0.50 g/m.sup.2 to 6.0
 g/m.sup.2.
 Said dye diffusion image receiving layer preferably comprises a hydrophilic
 binder, more preferably a proteinous hydrophilic binder, most preferably
 gelatin in an amount ranging from 0.50 g/m.sup.2 to 5.0 g/m.sup.2
 Preferably said dye diffusion image receiving layer contains at least one
 gelatin species whereof a 10% by weight aqueous solution at 36.degree. C.
 and pH 6 has a viscosity higher than 35 mPa.s at a shearing rate of
 1000s.sup.-1.
 A black-and-white photograph in the form of a silver image is formed by the
 silver salt diffusion transfer process, called herein DTR-process.
 According to said process dissolved silver halide salt is transferred
 imagewise in a special image receiving layer, called development nuclei
 containing layer, for reducing therein transferred silver salt. In said
 process, the prelayer is optional.
 The principles of the DTR-process are described in U.S. Pat. No. 2,352,014
 of Andre Rott, issued Jun. 20, 1944. According to said process silver
 complexes are image-wise transferred by diffusion from a silver halide
 emulsion layer to an image-receiving layer, where they are converted, in
 the presence of development nuclei, into a silver image. For this purpose,
 an image-wise exposed silver halide emulsion layer is developed by means
 of a developing substance in the presence of a so-called silver halide
 solvent. In the exposed parts of the silver halide emulsion layer the
 silver halide is developed to metallic silver so that it cannot dissolve
 anymore and consequently cannot diffuse. In the non-exposed parts of the
 silver halide emulsion layer the silver halide is converted into soluble
 silver complexes by means of a silver halide complexing agent, acting as
 silver halide solvent, and said complexes are transferred by diffusion
 into an image-receiving layer being in waterpermeable contact with said
 emulsion layer to form by the catalytic action of said development nuclei,
 in so-called physical development, a silver-containing image in the
 image-receiving layer.
 The DTR-image can be formed in the image receiving layer of a sheet or web
 material which is a separate element with respect to the photographic
 silver halide emulsion material (a so-called two-sheet DTR element) or in
 the image receiving layer of a so-called single-support-element, also
 called mono-sheet element, which contains at least one photographic silver
 halide emulsion layer integral with an image receiving layer in
 waterpermeable relationship therewith. It is the first two-sheet version
 which is preferred for the preparation of the information carrier by the
 DTR method.
 The DTR process can be utilized for reproducing line originals e.g. printed
 documents, as well as for reproducing continuous tone originals, e.g.
 portraits.
 By the fact that the DTR-image is based on diffusion transfer of imaging
 ingredients the image-receiving layer and optionally present covering
 layer(s) have to be waterpermeable.
 A first method of reproducing images by the DTR process is by making a
 raster image using a screen and an emulsion with a steep gradient, which
 method is very well known to the people skilled in the art.
 A second method is by making a continuous tone image. The reproduction of
 black-and-white continuous tone images by the DTR-process requires the use
 of a recording material capable of yielding images with considerable lower
 gradient than is normally applied in document reproduction to ensure the
 correct tone rendering of continuous tones of the original. In document
 reproduction silver halide emulsion materials are used which normally
 mainly contain silver chloride. Silver chloride not only leads to a more
 rapid development but also to high contrast.
 In U.S. Pat. No. 3,985,561, to be read in conjunction herewith, a
 light-sensitive silver halide material is described wherein the silver
 halide is predominantly chloride and this material is capable of forming a
 continuous tone image on or in an image-receiving material by the
 diffusion transfer process.
 According to said U.S. patent a continuous tone image is produced by the
 diffusion transfer process in or on an image-receiving layer through the
 use of a light-sensitive layer which contains a mixture of silver chloride
 and silver iodide and/or silver bromide dispersed in a hydrophilic colloid
 binder e.g. gelatin, wherein the silver chloride is present in an amount
 of at least 90 mole % based on the total mole of silver halide and wherein
 the weight ratio of hydrophilic colloid to silver halide, expressed as
 silver nitrate, is between 3:1 and about 10:1 by weight.
 With these light-sensitive materials successful reproduction of continuous
 tone images can be obtained probably as a result of the presence of the
 indicated amounts of silver iodide and/or silver bromide and of the
 defined high ratio of hydrophillic colloid to silver halide.
 According to U.S. Pat. No. 4,242,436 likewise to be read in conjunction
 herewith, the reproduction of continuous tone images can be improved by
 developing the photographic material with a mixture of developing agents
 comprising an o-dihydroxybenzene, e.g. catechol, a 3-pyrazolidone e.g. a
 1-aryl-3-pyrazolidone and optionally a p-dihydroxybenzene, e.g.
 hydroquinone, the molar amount of the o-dihydroxybenzene in said mixture
 being larger than the molar amount of the 3-pyrazolidone, and the
 p-dihydroxybenzene if any being present in a molar ratio of at most 5%
 with respect to the o-dihydroxybenzene.
 Suitable development nuclei for use in the above mentioned physical
 development in the image receiving layer are e.g. noble metal nuclei e.g.
 silver, palladium, gold, platinum, sulphides, selenides or tellurides of
 heavy metals such as Pd, Ag, Ni and Co.
 Preferably used development nuclei are colloidal PdS, Ag2S or mixed
 silver-nickelsulphide particles. The amount of nuclei used in the image
 receiving layer is preferably between 0.02 mg/m.sup.2 and 10 mg/m.sup.2.
 The image receiving layer comprises for best imaging results the physical
 development nuclei in the presence of a protective hydrophilic colloid,
 e.g. gelatin and/or colloidal silica, polyvinyl alcohol etc.
 The transfer behaviour of the complexed silver largely depends on the
 thickness of the image-receiving layer and the kind of binding agent or
 mixture of binding agents used in the nuclei containing layer. In order to
 obtain a sharp image with high spectral density the reduction of the
 silver salts diffusing into the image receiving layer must take place
 rapidly before lateral diffusion becomes substantial. An image-receiving
 material satisfying said purpose is described in U.S. Pat. No. 4,859,566.
 The coating of said layers proceeds preferably with slide hopper coater or
 curtain coater known to those skilled in the art.
 The undercoat optionally incorporates substances that improve the image
 quality, e.g. incorporates a substance improving the image-tone or the
 whiteness of the image background. For example, the undercoat may contain
 silver complexing agent(s) and/or development inhibitor releasing
 compounds known for improving image sharpness.
 In the image-receiving layer gelatin is used preferably as hydrophilic
 colloid. Gelatin is present preferably for at least 60% by weight and is
 optionally used in conjunction with an other hydrophilic colloid, e.g.
 polyvinyl alcohol, cellulose derivatives, preferably carboxymethyl
 cellulose, dextran, gallactomannans, alginic acid derivatives, e.g.
 alginic acid sodium salt and/or watersoluble polyacrylamides. Said other
 hydrophilic colloid may be used also in the top layer for at most 10% by
 weight and in the undercoat in an amount lower than the gelatin content.
 The image-receiving layer and/or a hydrophilic colloid layer in
 water-permeable relationship therewith may comprise a silver halide
 developing agent and/or silver halide solvent, e.g. sodium thiosulphate in
 an amount of approximately 0.1 g to approximately 4 g per m.sup.2.
 The image-receiving layer or a hydrophilic colloid layer in water-permeable
 relationship therewith may comprise colloidal silica.
 The image-receiving layer may comprise a silver halide developing agent
 and/or silver halide solvent, e.g. sodium thiosulphate in an amount of
 approximately 0.1 g to approximately 4 g per m.sup.2.
 The image-receiving layer may contain as physical development accelerators,
 in operative contact with the developing nuclei, thioether compounds such
 as those described e.g. in DE-A- 1 124 354; U.S. Pat. No. 4,013,471; U.S.
 Pat. No. 4,072,526 and in EP-A- 26 520.
 According to a preferred embodiment the processing liquid and/or the DTR
 image-receiving material contains at least one image toning agent. In said
 case the image toning agent(s) may gradually transfer by diffusion from
 said image-receiving material into the processing liquid and keep therein
 the concentration of said agents almost steady. In practice such can be
 realized by using the silver image toning agents in a coverage in the
 range from 1 mg/m.sup.2 to 20 mg/m.sup.2 in a hydrophilic waterpermeable
 colloid layer.
 A survey of suitable toning agents is given in the below mentioned book of
 Andre Rott and Edith Weyde, p. 61-65, preference being given to
 1-phenyl-lH-tetrazole-5-thiol, also called 1-phenyl-5-mercapto-tetrazole,
 tautomeric structures and derivatives thereof such as
 1-(2,3-dimethylphenyl)-5-mercapto-tetrazole,
 1-(3,4-dimethylcyclohexyl)-5-mercapto-tetrazole,
 1-(4-methylphenyl)-5-mercapto-tetrazole,
 1-(3-chloro-4-methylphenyl)-5-mercapto-tetrazole,
 1-(3,4-dichlorophenyl)-5-mercapto-tetrazole. Further particularly useful
 toning agents are of the class of thiohydantoins and of the class of
 phenyl substituted mercapto-triazoles. Still further toning agents
 suitable for use in accordance with the preferred embodiment of the
 present invention are the toning agents described in EP-A- 218 752, 208
 346, 218 753 and U.S. Pat. No. 4,683,189.
 The above mentioned DTR image-receiving materials may be used in
 conjunction with any type of photosensitive material containing a silver
 halide emulsion layer. For continuous tone reproduction the silver halide
 comprises preferably a mixture of silver chloride, and silver iodide
 and/or silver bromide, at least 90 mole % based on the total mole of the
 silver halide being silver chloride, and the ratio by weight of
 hydrophillic colloid to silver halide expressed as silver nitrate is
 preferably between 3:1 and 10:1.
 The binder for the silver halide emulsion layer and other optional layers
 contained on the imaging element is preferably gelatin. But instead of or
 together with gelatin, use can be made of one or more other natural and/or
 synthetic hydrophilic colloids, e.g. albumin, casein, zein, polyvinyl
 alcohol, alginic acids or salts thereof, cellulose derivatives such as
 carboxymethyl cellulose, modified gelatin, e.g. phthaloyl gelatin etc. The
 weight ratio in the silver halide emulsion layer of hydrophilic colloid
 binder to silver halide expressed as equivalent amount of silver nitrate
 to binder is e.g. in the range of 1:1 to 10:1, but preferably for
 continuous tone reproduction is between 3.5:1 and 6.7:1.
 The silver halide emulsions may be coarse or fine grain and can be prepared
 by any of the well known procedures e.g. single jet emulsions, double jet
 emulsions such as Lippmann emulsions, ammoniacal emulsions, thiocyanate-
 or thioether-ripened emulsions such as those described in U.S. Pat. No.
 2,222,264, 3,320,069, and 3,271,157. Surface image emulsions may be used
 or internal image emulsions may be used such as those described in U.S.
 Pat. No. 2,592,250, 3,206,313, and 3,447,927. If desired, mixtures of
 surface and internal image emulsions may be used as described in U.S. Pat.
 No. 2,996,382.
 The silver halide particles of the photographic emulsions may have a
 regular crystalline form such as cubic or octahedral form or they may have
 a transition form. Regular-grain emulsions are described e.g. in J.
 Photogr. Sci., Vol. 12, No. 5, September/October 1964, pp. 242-251. The
 silver halide grains may also have an almost spherical form or they may
 have a tabular form, or may have composite crystal forms comprising a
 mixture of regular and irregular crystalline forms. The silver halide
 grains may have a multilayered structure having a core and shell of
 different halide composition. Besides having a differently composed core
 and shell the silver halide grains may comprise also different halide
 compositions and metal dopants inbetween.
 The number average size expressed as the number average diameter of the
 silver halide grains may range from 0.2 to 1.2 .mu.m, preferably between
 0.2 mm and 0.8 mm, and most preferably between 0.3 mm and 0.6 mm. The size
 distribution can be homodisperse or heterodispere.
 A homodisperse size distribution is obtained when 95% of the grains have a
 size that does not deviate more than 30% from the average grain size.
 The emulsions can be chemically sensitized e.g. by adding
 sulphur-containing compounds during the chemical ripening stage e.g. allyl
 isothiocyanate, allyl thiourea, and sodium thiosulphate. Also reducing
 agents e.g. the tin compounds described in BE-A- 493 464 and 568 687, and
 polyamines such as diethylene triamine or derivatives of
 aminomethane-sulphonic acid can be used as chemical sensitizers. Other
 suitable chemical sensitizers are noble metals and noble metal compounds
 such as gold, platinum, palladium, iridium, ruthenium and rhodium. This
 method of chemical sensitization has been described in the article of R.
 KOSLOWSKY, Z. Wiss. Photogr. Photophys. Photochem. 46, 65-72 (1951).
 The emulsions can also be sensitized with polyalkylene oxide derivatives,
 e.g. with polyethylene oxide having a molecular weight of 1000 to 20,000,
 or with condensation products of alkylene oxides and aliphatic alcohols,
 glycols, cyclic dehydration products of hexitols, alkyl-substituted
 phenols, aliphatic carboxylic acids, aliphatic amines, aliphatic diamines
 and amides. The condensation products have a molecular weight of at least
 700, preferably of more than 1000. It is also possible to combine these
 sensitizers with each other as described in BE-P 537,278 and GB-P 727,982.
 The silver halide emulsion may be sensitized panchromatically to ensure
 reproduction of all colors of the visible part of the spectrum or it may
 be orthochromatically sensitized.
 The spectral photosensitivity of the silver halide can be adjusted by
 proper spectral sensitization by means of the usual mono- or polymethine
 dyes such as acidic or basic cyanines, hemicyanines, oxonols, hemioxonols,
 styryl dyes or others, also tri- or polynuclear methine dyes e.g.
 rhodacyanines or neocyanines. Such spectral sensitizers have been
 described by e.g. F. M. HAMER in "The Cyanine Dyes and Related Compounds"
 (1964) Interscience Publishers, John Wiley & Sons, New York.
 The silver halide emulsions may contain the usual stabilizers e.g.
 azaindenes, preferably tetra- or penta-azaindenes, especially those
 substituted with hydroxy or amino groups. Compounds of this kind have been
 described by BIRR in Z. Wiss. Photogr. Photophys. Photochem. 47, 2-27
 (1952). Other suitable stabilizers are i.a. heterocyclic mercapto
 compounds e.g. phenylmercaptotetrazole, quaternary benzothiazole
 derivatives, and benzotriazole.
 A survey of photographic silver halide emulsions and their preparation is
 given in Research Disclosure December 1989, item 308119.
 Processing of the image-wise exposed photographic silver halide emulsion
 layer proceeds whilst in contact with an image receiving material and is
 accomplished using an alkaline processing liquid having a pH preferably
 between 9 and 13. The pH of the alkaline processing liquid may be
 established using various alkaline substances. Suitable alkaline
 substances are inorganic alkali e.g. sodium hydroxide, potassium carbonate
 or alkanolamines or mixtures thereof. Preferably used alkanolamines are
 tertiary alkanolamines e.g. those described in EP-A- 397 925, EP-A- 397
 926, EP-A- 397 927, EP-A- 398 435 and U.S. Pat. No. 4,632,896.
 A combination of alkanolamines having both a pKa above or below 9 or a
 combination of alkanolamines whereof at least one has a pKa above 9 and
 another having a pKa of 9 or less may also be used as disclosed in the
 Japanese patent applications laid open to the public numbers 73949/61,
 73953/61, 169841/61, 212670/60, 73950/61, 73952/61, 102644/61, 226647/63,
 229453/63, U.S. Pat. No. 4,362,811, U.S. Pat. No. 4,568,634 etc. The
 concentration of these alkanolamines is preferably from 0.1 mol/l to 0.9
 mol/l.
 Suitable developing agents for the exposed silver halide are e.g.
 hydroquinone-type and 1-phenyl-3-pyrazolidone-type developing agents as
 well as p-monomethylaminophenol and derivatives thereof.
 Preferably used is a combination of a hydroquinone-type and
 1-phenyl-3-pyrazolidone-type developing agent wherein the latter is
 preferably incorporated in one of the layers comprised on the support of
 the photographic material. A preferred class of
 1-phenyl-3-pyrazolidone-type developing agents is disclosed in EP-A- 449
 340.
 Other type of developing agents suitable for use in accordance with the
 present invention are reductones e.g. ascorbic acid derivatives. The
 developing agent or a mixture of developing agents can be present in an
 alkaline processing solution, in the photographic material or the image
 receiving material. In case the developing agent or a mixture of
 developing agents is contained in the photographic material and/or image
 receiving material, the processing solution can be merely an aqueous
 alkaline solution that initiates and activates the development.
 In the DTR process the photographic element is developed in the presence of
 a silver halide solvent. Preferably used silver halide solvents are water
 soluble thiosulphate compounds such as ammonium and sodium thiosulphate,
 or ammonium and alkali metal thiocyanates. Other useful silver halide
 solvents (or "complexing agents") are described in the book "The Theory of
 the Photographic Process" edited by T. H. James, 4th edition, p. 474-475
 (1977), in particular sulphites and uracil. Further interesting silver
 halide complexing agents are cyclic imides, preferably combined with
 alkanolamines, as described in U.S. Pat. No. 4,297,430 and U.S. Pat. No.
 4,355,090. 2-mercaptobenzoic acid derivatives are described as silver
 halide solvents in U.S. Pat. No. 4,297,429, preferably combined with
 alkanolamines or with cyclic imides and alkanolamines.
 Dialkylmethylenedisulfones can also be used as silver halide solvent.
 The silver halide solvent is preferably present in the processing solution
 but may also be present in one or more layers comprised on the support of
 the imaging element and/or receiving material.
 The processing solution for use in the production of black-and-white
 photographs may comprise other additives such as e.g. thickeners,
 preservatives, detergents e.g. acetylenic detergents such as SURFYNOL
 104.TM., SURFYNOL 465.TM., SURFYNOL 440.TM. etc. all available from Air
 Reduction Chemical Company, New York.
 The DTR-process is normally carried out at a temperature in the range of
 10C to 35.degree. C.
 More details on the DTR-process can be found in "Photographic Silver Halide
 Diffusion Processes" by A. Rott and E. Weyde, Focal Press, London, N.Y.
 (1972).
 The prelayer according to the invention contains at least one gelatin
 species whereof a 10% by weight aqueous solution at 36.degree. C. and pH 6
 has a viscosity ranging from 15 to 30 mPa.s at a shearing rate of
 1000s.sup.-1, preferably in an amount ranging from 0.20 g/m.sup.2 to 2.0
 g/m.sup.2. Further said layer preferably contains a hardener, more
 preferably an epoxysiloxane. Other additives such as an UV-absorber and a
 surfactant may also be present.
 The interlayer comprises a polyurethane polymer, preferably in the form of
 a dispersion, preferably with a viscosity at 23.degree. C. between 20 and
 80 mPa.s at a shearing rate of 250s and a cross-linking compound. The
 particles have preferably a number average diameter ranging from 0.05 to 1
 .mu.m. Said polyurethane has preferably a molecular weight between 5,000
 and 1,000,000, more preferably between 20,000 and 100,000. Said
 polyurethane is present in a range from 1 g/m.sup.2 to 10 g/m.sup.2.
 Furtheron said layer contains a cross-linking compound, preferably in the
 range from 0.02 g/m.sup.2 to 0.2 g/m.sup.2. Preferred cross-linking
 compounds are isocyanates, preferably oligomeric isocyanates as DESMODUR
 DA.TM., a 1-6 hexamethylene diisocyanate polyisocyanate from Bayer, A. G.,
 and amidosiloxanes.
 The support is preferably between 50 and 150 Im thick, more preferably
 between 75 and 125 .mu.m. Said support is transparent and preferably
 oriented.
 Preferably the imaged element carries a protecting layer at the side of the
 support not covered by an imaged layer. The protecting layer comprises a
 polymer, preferably a poly(meth)acrylate in an amount ranging from 50
 mg/m.sup.2 to 500 mg/m.sup.2, a finely divided inorganic powder,
 preferably silicium dioxide with a specific surface ranging from 100 to
 500 m.sup.2 per gr and a matting agent in an amount ranging from 0.1
 mg/m.sup.2 to 1 mg/m.sup.2 with an average number diameter ranging from 1
 to 7 .mu.m. Said layer can further contain a surfactant, an antistatic
 polymer, etc.
 In another elmbodiment said optical card is laminated on the side
 containing the adhesive layer to a layer package comprising in the order
 given a prelayer, an interlayer, a transparent support, preferably as
 mentioned above and preferably a protective layer.
 Said prelayer, as also in the previous embodiment can be imaged with
 different printers such as a laser printer, a wax printer and an ink jet
 printer.
 The surfaces of the protective layers and the prelayer when said layer is
 an outer layer of a layer package can receive security or verification
 marks in the form of e.g. finger prints, printed patterns known from bank
 notes, holograms, kinegrams, coded information, e.g. binary code
 information, signature or other printed personal data or marks that may be
 applied with liquid crystals, fluorescent pigments, nacreous pigments
 giving special light-reflection effects, and/or visibly legible or
 ultraviolet-legible printing inks as described e.g. in GB-P- 1 518 946 and
 U.S. Pat. No. 4,105,333. On said layers can be printed with a wax printer,
 a laser printer, an ink jet printer and all other kinds of printers. After
 imaging the diffusion image receiving layer or the prelayer the layer
 package or layer packages containing said layers are laminated to the
 optical card with the image receiving layer or the prelayer contiguous to
 the optical card.

While the present invention will hereinafter be described in connection
 with preferred embodiments thereof, it will be understood that it is not
 intended to limit the invention to those embodiments.
 EXAMPLE I
 As the optical recording medium was employed one obtained by coating a
 polymethine type dye with a thickness of 0.1 .mu.m as the optical
 recording layer on a black acrylic resin substrate equipped with a
 pregroove of 85 mm.times.54 mm.times.0.4 mm, followed by lamination of a
 polyethylene layer of 30 .mu.m. A layer package is prepared consisting in
 the order given of a physical nuclei containing image receiving layer, a
 prelayer, an interlayer, a subbed polyethylene terephthalate layer and a
 protective layer.
 The layer package is prepared consisting in the order given of a silver
 diffusion image receiving layer, a prelayer, an adhesive layer, a subbed
 polyethylene terephthalate layer and a protective layer.
 The silver diffusion image receiving layer was coated at a dry coverage of
 1.77 g/m.sup.2 with an image-receiving layer containing silver-nickel
 sulphide nuclei dispersed in gelatin.
 The prelayer consist of 0.6 g/m.sup.2 of a medium viscous Ca-containing
 gelatin K16096 of Koepff, 0.20 g/m.sup.2 of a UV-filtering dye, 0.10
 g/m.sup.2 of an epoxysiloxane and 0.03 g/m.sup.2 of an anionic surfactant
 The interlayer consist of 2.4 g/m.sup.2 of LUPHEN D200A.TM., a polyurethane
 dispersion with a viscosity at 23.degree. C. between 20 and 80 mPa.s at a
 shearing rate of 250s.sup.-1 from Bayer, A. G. and 0.075 g/m.sup.2 of an
 amidosiloxane cross-linking compound.
 The subbed polyethylene terephthalate layer is 100 .mu.m thick. transparent
 and oriented.
 The protecting layer comprises 200 mg/m.sup.2 polymethacrylate, 20
 mg/m.sup.2 silicium dioxide with a specific surface of 100 m.sup.2 per gr,
 0.3 mg/in.sup.2 of a polymethacrylate matting agent with an average number
 diamete:r ranging of 3 .mu.m. Said layer further contains 20 mg/m.sup.2 of
 a surfactant, and 150 mg/m.sup.2 of an antistatic polymer.
 Preparation of the Imaging Material.
 A paper support having a weigth of 110 g/m.sup.2 being coated at both sides
 with a polyethylene layer and provided at one side with a pack of two
 backing layers was coated at the other side with an antihalation layer
 containing carbon black in such an amount that the optical density for
 visual light corresponded to 0.6 and gelatin in an amount of 3.9 g/m.sup.2
 and wherein also hydroquinone and 1-phenyl-4-methyl-pyrazolidin-3-one were
 present in a coverage of 0.57 glm.sup.2 and 0.32 g/m.sup.2. On said
 antihalation layer an orthochromatically sensitized negative working
 gelatino silver halide emulsion layer was coated containing an amount of
 silver chlorobromide (1.8 mol % bromide) equivalent to 2.0 g/m.sup.2 of
 silver nitrate and an amount of gelatin of 2.66 g/m2. The average grain
 size of the silver chlorobromide was 0.3 .mu.m. The silver halide emulsion
 layer was overcoated with a thin protective gelatin layer at a coverage of
 0.5 g/m2.
 The layer nearest to the support of the backing layer pack contained 4
 g/m.sup.2 of gelatin, 1.5 g/m.sup.2 of a colloidal silica and 0.021
 g/m.sup.2 of wetting agent F.sub.15 C.sub.7 --COONH4. The second backing
 layer contained 0.3 g/m2 of gelatin, 0.5 g/m2 of the antistatic agent
 co(tetraallyloxyethane/methacrylate/acrylic acid-K-salt) polymer and 0.05
 g/m2 of hardening agent triacrylformal

Composition of the processing liquid: A1
 Hydroxyethylcellulose (g) 1
 EDTA (g) 2
 Na2SO3 (anhydrous) (g) 45
 Na2S2O3 (anhydrous) (g) 14
 KBr (g) 0.5
 1-Phenyl-5-mercapto-tetrazole (g) 0.08
 1-(3,4 dichlorophenyl)-1-H- 0.04
 tetrazole-5-thiol (g)
 DMEA (ml) 30
 MDEA (ml) 35
 Boric acid 31
 Sodium hydroxide 33.5
 Water up to 1 liter
 pH 11.4
 EDTA = ethylenediaminetetraacetic acid tetrasodium salt
 DMEA = dimethylethanolamine
 MDEA = methyldiethanolamine
 The photographic material was exposed through a sensitometric wedge in a
 contact exposure apparatus operating with a light source having a colour
 temperature of 3200.degree. K. The exposed photographic material was
 pre-moistened with the processing liquid, the contact time with said
 liquid being 6 seconds before being pressed together with the
 image-receiving material as defined above. The transfer processor employed
 was a COPYPROOF (registered trade name of AGFA-GEVAERT N.V.) type CP 380.
 The transfer was carried out at a processing temperature of 22.degree. C.
 at a transfer contact time being 60 seconds.
 The layer package was laminated to the optical card in so a way that the
 image receiving layer of the layer package was laminated to the
 polyethylene layer of the optical card. A visually perfectly legible image
 was obtained.