EP0317514A1 - Process for producing a document of which at least a part is not reproducible by means of photocopying - Google Patents

Process for producing a document of which at least a part is not reproducible by means of photocopying Download PDF

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Publication number
EP0317514A1
EP0317514A1 EP88810785A EP88810785A EP0317514A1 EP 0317514 A1 EP0317514 A1 EP 0317514A1 EP 88810785 A EP88810785 A EP 88810785A EP 88810785 A EP88810785 A EP 88810785A EP 0317514 A1 EP0317514 A1 EP 0317514A1
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Prior art keywords
iridescent
layers
deposited
layer
support
Prior art date
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EP88810785A
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German (de)
French (fr)
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EP0317514B1 (en
Inventor
Paul Heinzer
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Lipatec Etablissement
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Lipatec Etablissement
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/465—Associating two or more layers using chemicals or adhesives
    • B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/08—Photoprinting; Processes and means for preventing photoprinting
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/04—Preventing copies being made of an original
    • G03G21/043—Preventing copies being made of an original by using an original which is not reproducible or only reproducible with a different appearence, e.g. originals with a photochromic layer or a colour background
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S283/00—Printed matter
    • Y10S283/902—Anti-photocopy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/916—Fraud or tamper detecting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24851—Intermediate layer is discontinuous or differential
    • Y10T428/24868—Translucent outer layer

Definitions

  • the subject of the present invention is a method of manufacturing a document comprising a medium carrying alpha-numeric or graphic information, at least part of which is not reproducible by photocopying.
  • a document comprising a medium, for example a film or a paper, bearing alpha-numeric or graphic information, prepared by manual writing, typewriter, photocopying, printing, telex or facsimile, can be reproduced by a large number of photocopying machines, without the knowledge of the information holder.
  • Illegal copying of documents is becoming more and more common in the economic, scientific, political and military fields and can cause irreparable financial or moral harm.
  • the object of the present invention is to provide a simple and economical process for the production of documents which cannot be reproduced by office reproduction apparatus and which have good contrast for the human eye.
  • the method according to the present invention is characterized in that adjacent areas are formed on the surface of the non-reproducible part of the document support by the deposition of layers containing at least one iridescent substance and layers of dark.
  • the present invention is based on the discovery during research of the solution to the problem posed by the production of a non-reproducible document by photocopying, that by photocopying a layer containing one or more iridescent substances one always obtains, whatever the level of luminosity, a black copy, although the surface containing the iridescent substance (s) is colored.
  • a layer containing one or more iridescent substances one always obtains, whatever the level of luminosity, a black copy, although the surface containing the iridescent substance (s) is colored.
  • iridescent substance is meant a substance which, according to the principle of diffraction of light by thin layers, causes, depending on the angle of observation, reflections whose colors cover the rainbow spectrum of the decomposed white light.
  • pearlescent pigments composed of thin platelets mica coated with a thin layer of titanium dioxide. Interference colors are formed by refraction and reflection of light on the layer of titanium dioxide with a high refractive index. Each colored shade results from a defined thickness of the layer of titanium dioxide.
  • the successive coating of the mica with titanium dioxide and an additional dye, such as iron oxide (III) or chromium oxide (III) leads to iridescent pigments with bright colored effects combining the action pearlescent pigment and coloring pigment.
  • Such pigments allow metallic effects to be achieved without being exposed to the disadvantages of metals or their alloys.
  • the particle size range determines the effect. Large particles give a glittery effect, while finer particles give a rather silky luster.
  • the iridescent pigments we can cite, for example, the Irodins manufactured by E.Merck, D-6100 Darmstadt, and the Merlin Luster Pigments manufactured by The Mearl Corporation, New York, NY, USA .
  • iridescent pigments can be enhanced by placing the layer containing one or more iridescent substances on a dark colored substrate.
  • Layers containing one or more iridescent substances can be prepared according to techniques known in the printing and coating field, for example, heliographic printing, offset printing or coating with Mayerbar. in the form of a single layer over the entire surface of the non-reproducible part of the document, either in the form of alpha-numeric or graphic information. It is also possible to deposit the layers containing at least one substance iridescent in the form of a frame or any other motif.
  • the dark colored layers can be deposited by known techniques, in most cases in the form of alpha-numeric or graphic information, for example by manual or mechanical writing, or even by printing, such as offset or Gravure printing. Dark layers can also be formed by non-mechanical printing, such as inkjet, laser printer, photocopying or thermal transfer techniques. They can also be deposited by chemical reaction, such as whether found in silver photography, diazotics or carbon-free chemical papers. More information on these chemical processes can be found in GB 1 298 194, US 4,137,084 and US 4,162,165 .
  • Figures 1 to 4 schematically illustrate, by way of nonlimiting examples, four of the possible modes of implementing the method according to the present invention.
  • FIG. 1 represents, in section, a part of the part which cannot be reproduced by photocopying of a document obtained by a first mode of implementation of the method.
  • This mode consists in depositing on a support l, white or colored, a single layer 2 containing at least one iridescent substance.
  • the layers 3, of dark color, are then deposited on the coated support l, in the form of desired information, for example, by manual writing, by photocopying, if the support l is introduced coated in a photocopier instead of normal paper, or offset printing on the coated support.
  • the document thus prepared cannot be photocopied, since any photocopy of such a document only gives a black copy without information.
  • FIG. 2 represents, in section, a part of the part which cannot be reproduced by photocopying of a document obtained by a second mode of implementation of the method.
  • This mode consists in depositing on a support l, white or colored, first a single layer 4, of dark color, on which a single layer 2 is then deposited containing at least one iridescent substance and, on it, layers 3 of dark color, in the form of desired alpha-numeric or graphic information.
  • the presence of layer 4 enhances the effect of the iridescent substance or substances contained in layer 2, so that a photocopy of the document thus obtained will be even darker than that of the document shown in FIG. 1, hence greater security against any improper reproduction.
  • FIG. 3 represents, in section, a part of the part which cannot be reproduced by photocopying a document obtained by a third mode of implementation of the method.
  • This mode consists in depositing layers 3, white or colored, , dark in color, in the form of desired information. Then, over layers 3, by means of a self-adhesive adhesive 5, a single layer 2 containing at least one iridescent substance, previously deposited on one side of a layer, is deposited. transparent film 6. The assembly formed of film 6, layer 2 and adhesive 5, prepared in advance by coating one face of film 6 with layer 2, then this one with a layer of adhesive 5, is laminated to the support 1.
  • This mode of implementation of the method therefore lends itself particularly to protection against reproduction of an existing document. By using a repositionable adhesive, an existing document reproducible by photocopy, can be rendered , in whole or in part, not reproducible and then reproducible again.
  • FIG. 4 represents, in section, a part of the non-reproducible part by photocopying of a document obtained by a fourth mode of implementation of the method.
  • This mode consists in depositing on a white or colored support, a single layer 3, dark in color, then deposit, on this layer 3, layers 2 containing at least one iridescent substance, in the form of desired alpha-numeric or graphic information.
  • the layers 2 are formed by printing at using com ink taking at least one iridescent pigment. They can also be formed by xerography, each by means of a layer of powder toner to which the layer containing at least one iridescent substance is thermally transferred, from a special film. such transfer process is marketed by Omnicrom Systems Ltd., GB- Bolton. Photocopying a document obtained by this mode of implementation of the process, gives a black surface with no image trace.

Abstract

The process consists in forming on the surface of the support (1) of the non-reproducible part of the document, adjacent areas by deposition of layers (2) containing at least one iridescent substance and of dark-coloured layers (3). …<IMAGE>…

Description

La présente invention a pour objet un procédé de fa­brication d'un document comprenant un support portant des informations alpha-numériques ou graphiques,dont au moins une partie est non reproductible par photocopie.The subject of the present invention is a method of manufacturing a document comprising a medium carrying alpha-numeric or graphic information, at least part of which is not reproducible by photocopying.

Un document comprenant un support,par exemple un film ou un papier,portant des informations alpha-numériques ou graphiques,préparé par écriture manuelle,machine à écrire, photocopie,impression,telex ou fac-similé,peut être re­produit par un grand nombre de machines à photocopier,à l'insu du détenteur des informations.La copie illégale de documents est de plus en plus courante dans les domai­nes économiques,scientifiques,politiques et militaires et peut entrainer des torts financiers ou moraux irréparables.A document comprising a medium, for example a film or a paper, bearing alpha-numeric or graphic information, prepared by manual writing, typewriter, photocopying, printing, telex or facsimile, can be reproduced by a large number of photocopying machines, without the knowledge of the information holder. Illegal copying of documents is becoming more and more common in the economic, scientific, political and military fields and can cause irreparable financial or moral harm.

Les efforts pour se protéger contre la falsification et la contrefaçon de pièces de paiement et de documents officiels,tels que papier monnaie,les chèques,les bons de caisse,les cartes d'identité et les passeports,ont con­duit à des solutions techniques fondées sur l'utilisation de filigranes,fils,fibres et planchettes colorés,métalli­sés ou magnétisables.L'état de la technique dans ce do­maine est décrit dans le brevet GB 1 127 043.Maleureuse­ment,les papiers de sécurité préparés selon ces procédés ne protègent que peu ou pas les documents contre la pho­tocopie.Efforts to protect against falsification and counterfeiting of payment documents and official documents, such as paper money, checks, cash vouchers, identity cards and passports, have led to technical solutions based on the use of watermarks, threads, fibers and colored, metallized or magnetizable boards. The state of the art in this field is described in patent GB 1,127,043. Unfortunately, the security papers prepared according to these methods provide little protection. or not the documents against photocopying.

Divers procédés,produits et dispositifs d'interdic­tion de reproduction de documents ont été brevetés et parfois commercialisés,tels que,par exemple,un papier couché de couleur cacao produit par Calspan et Ludlow Papier co.,Needham Heigts,Mass.,USA.Le brevet US 3 597 082 se rapporte aux pigments photochromatiques pour éviter la photocopie.Le brevet FR 2 177 292 délivré a IBM préco­nise l'utilisation d'encres spéciales imprimées sur un fond de mascage.Le brevet US 4 578 298 a pour objet un film autocollant permettant la protection de documents contre la photocopie.Ce produit est composé d'un film co­loré dans la masse et d'une couche de métal semitranspa­rent déposée par métallisation sous vide.La société Nacopi International Inc. a présenté un papier de sécurité non reproductible par photocopie,basé sur une composition de colorants de couleurs foncées couvrant le spectre de sen­sibilité des photocopieurs modernes.Various processes, products and devices for prohibiting the reproduction of documents have been patented and sometimes marketed, such as, for example, a cocoa-colored coated paper produced by Calspan and Ludlow Papier co., Needham Heigts, Mass., USA. US Patent 3,597,082 relates to photochromatic pigments to avoid photocopying. Patent FR 2,177,292 issued to IBM recommends the use of special inks printed on a US Pat. No. 4,578,298 relates to a self-adhesive film allowing the protection of documents against photocopying. This product is composed of a film colored in the mass and a layer of semi-transparent metal deposited by vacuum metallization. The company Nacopi International Inc. presented a security paper which cannot be reproduced by photocopying, based on a composition of dyes of dark colors covering the spectrum of sensitivity of modern photocopiers.

Tous ces produits sont de fabrication coûteuse ou d'application limitée,ou encore de qualité médiocre quant au contraste de l'image du document.All these products are expensive to manufacture or of limited application, or of poor quality as regards the contrast of the image of the document.

Le but de la présente invention est de fournir un pro­cédé simple et économique permettant la fabrication de documents non reproductibles par les appareils de repro­duction de bureau et ayant un bon contraste pour l'oeil humain.The object of the present invention is to provide a simple and economical process for the production of documents which cannot be reproduced by office reproduction apparatus and which have good contrast for the human eye.

A cet effet,le procédé selon la présente invention est caractérisé par le fait que l'on forme sur la surface de la partie non reproductible du support de document des plages adjacentes par le dépôt de couches contenant au moins une substance iridescente et de couches de couleur foncée.To this end, the method according to the present invention is characterized in that adjacent areas are formed on the surface of the non-reproducible part of the document support by the deposition of layers containing at least one iridescent substance and layers of dark.

La présente invention est basée sur la découverte au cours de la recherche de la solution au problème que pose la réalisation d'un document non reproductible par photo­copie,qu'en photocopiant une couche contenant une ou plu­sieurs substances iridescentes on obtient toujours,quelque soit le niveau de luminosité,une copie noire,bien que la surface contenant la ou les substances iridescentes soit colorée.En juxtaposant des plages de couleur foncée et des plages contenant de telles substances iridescentes,on peut former des images à bon contraste pour l'oeil humain,mais qui,photocopiées,donnent une surface noire continue,sans image discernable à l'oeil humain.The present invention is based on the discovery during research of the solution to the problem posed by the production of a non-reproducible document by photocopying, that by photocopying a layer containing one or more iridescent substances one always obtains, whatever the level of luminosity, a black copy, although the surface containing the iridescent substance (s) is colored. By juxtaposing dark colored areas and areas containing such iridescent substances, images with good contrast can be formed for the human eye , but which, photocopied, give a continuous black surface, with no image discernible to the human eye.

Par substance iridescente,on entend une substance qui, selon le principe de la diffraction de la lumière par des couches minces,provoque,en fonction de l'angle d'observa­tion des reflets dont les couleurs recouvrent le spectre arc-en-ciel de la lumière blanche décomposée.Comme sub­stances iridescentes qui conviennent,on peut citer les pigments nacrants composés de plaquettes minces de mica enrobées d'une fine couche de dioxyde de titane.Il se forme des couleurs d'interférence par réfraction et ré­flexion de la lumière sur la couche de dioxyde de titane à fort indice de réfraction.Chaque nuance colorée résulte d'une épaisseur définie de la couche de dioxyde de titane. L'enrobage successif du mica de dioxyde de titane et d'un colorant supplémentaire,tel que l'oxyde de fer(III)ou l'oxyde de chrome(III)conduit à des pigments iridescents avec des effets brillants colorés combinant l'action du pigment nacrant et du pigment colorant.De tels pigments permettent de réaliser des effets métalliques sans s'expo­ser aux inconvénients de métaux ou de leurs alliages.La fourchette de granulométrie détermine l'effet.Les grosses particules donnent un effet pailleté,alors que les parti­cules plus fines donnent un éclat plutôt soyeux.Parmis les pigments iridescents on peut citer,par exemple,les Irodins fabriqués par E.Merck,D-6100 Darmstadt,et les Merlin Lus­ter Pigments fabriqués par The Mearl Corporation,New York, N.Y.,USA.By iridescent substance is meant a substance which, according to the principle of diffraction of light by thin layers, causes, depending on the angle of observation, reflections whose colors cover the rainbow spectrum of the decomposed white light. As suitable iridescent substances, we can mention pearlescent pigments composed of thin platelets mica coated with a thin layer of titanium dioxide. Interference colors are formed by refraction and reflection of light on the layer of titanium dioxide with a high refractive index. Each colored shade results from a defined thickness of the layer of titanium dioxide. The successive coating of the mica with titanium dioxide and an additional dye, such as iron oxide (III) or chromium oxide (III) leads to iridescent pigments with bright colored effects combining the action pearlescent pigment and coloring pigment. Such pigments allow metallic effects to be achieved without being exposed to the disadvantages of metals or their alloys. The particle size range determines the effect. Large particles give a glittery effect, while finer particles give a rather silky luster. Among the iridescent pigments we can cite, for example, the Irodins manufactured by E.Merck, D-6100 Darmstadt, and the Merlin Luster Pigments manufactured by The Mearl Corporation, New York, NY, USA .

Au cours de cette recherche il a été constaté que l'effet des pigments iridescents peut être renforce en plaçant la couche contenant une ou plusieurs substances iridescentes sur un substrat de couleur foncée.During this research it was found that the effect of iridescent pigments can be enhanced by placing the layer containing one or more iridescent substances on a dark colored substrate.

Les couches contenant une ou plusieurs substances iri­descentes peuvent être préparées selon des techniques con­nues dans le domaine de l'impression et de couchage.Ci­tons,par exemple,l'impression héliographique,l'offset ou le couchage avec Mayerbar.Elles peuvent être déposées soit en forme d'une couche unique sur toute la surface de la partie non reproductible de document,soit en forme d'in­formations alpha-numériques ou graphiques.On peut égale­ment déposer les couches contenant au moins une substance iridescente en forme de trame ou tout autre motif.Layers containing one or more iridescent substances can be prepared according to techniques known in the printing and coating field, for example, heliographic printing, offset printing or coating with Mayerbar. in the form of a single layer over the entire surface of the non-reproducible part of the document, either in the form of alpha-numeric or graphic information. It is also possible to deposit the layers containing at least one substance iridescent in the form of a frame or any other motif.

Les couches de couleur foncée peuvent être déposées par des techniques connues,dans la plupart des cas en forme d'informations alpha-numériques ou graphiques,par exemple par écriture manuelle ou mécanique,ou encore par impression,telle que l'offset ou l'héliogra­vure.On peut également former les couches de couleur fon­cée par impression non mécanique,telle que la technique du jet d'encre,du "laser printer",de la photocopie ou du transfert thermique.Elles peuvent également être déposées par réaction chimique,telle que l'on la trouve dans la photographie argentique,l'image diazotique ou les papiers chimiques sans carbon.De plus amples renseignements sur ces procédés chimiques peuvent être trouvés dans les bre­vets GB 1 298 194 ,US 4 137 084 et US 4 162 165.The dark colored layers can be deposited by known techniques, in most cases in the form of alpha-numeric or graphic information, for example by manual or mechanical writing, or even by printing, such as offset or Gravure printing. Dark layers can also be formed by non-mechanical printing, such as inkjet, laser printer, photocopying or thermal transfer techniques. They can also be deposited by chemical reaction, such as whether found in silver photography, diazotics or carbon-free chemical papers. More information on these chemical processes can be found in GB 1 298 194, US 4,137,084 and US 4,162,165 .

Les figures l à 4 illustrent schématiquement,à titre d'exemples non limitatifs,quatre des modes possibles de mise en oeuvre du procédé selon la présente invention.Figures 1 to 4 schematically illustrate, by way of nonlimiting examples, four of the possible modes of implementing the method according to the present invention.

La figure l représente,en coupe,une partie de la par­tie non reproductible par photocopie d'un document obtenu par un premier mode de mise en oeuvre du procédé.Ce mode consiste à déposer sur un support l,blanc ou coloré,une couche unique 2 contenant au moins une substance iride­scente.Les couches 3,de couleur foncé,sont ensuite dépo­sées sur le support l couché,en forme d'informations dé­sirées,par exemple,par écriture manuelle,par photocopie, si l'on introduit le support l couché dans un photocopieur en lieu et place d'un papier normal,ou encore par impres­sion offset sur le support l couché.Le document ainsi pré­paré ne peut pas être photocopier,car toute photocopie d'un tel document ne donne qu'une copie noire sans infor­mations.FIG. 1 represents, in section, a part of the part which cannot be reproduced by photocopying of a document obtained by a first mode of implementation of the method. This mode consists in depositing on a support l, white or colored, a single layer 2 containing at least one iridescent substance. The layers 3, of dark color, are then deposited on the coated support l, in the form of desired information, for example, by manual writing, by photocopying, if the support l is introduced coated in a photocopier instead of normal paper, or offset printing on the coated support. The document thus prepared cannot be photocopied, since any photocopy of such a document only gives a black copy without information.

La figure 2 représente,en coupe,une partie de la par­tie non reproductible par photocopie d'un document obtenu par un deuxième mode de mise en oeuvre du procédé.Ce mode consiste à déposer sur un support l,blanc ou coloré,d'a­bord une couche 4 unique,de couleur foncée,sur laquelle on dépose ensuite une couche unique 2 contenant au moins une substance iridescente et,sur celle-ci,des couches 3 de couleur foncée,en forme d'informations alpha-numériques ou graphiques désirées.La présence de la couche 4 renforce l'effet de la ou des substances iridescentes que contient la couche 2,de sorte qu'une photocopie du document ainsi obtenu sera encore plus sombre que celle du document re­présenté à la figure l,d'où une sécurité plus grande contre toute reproduction abusive.FIG. 2 represents, in section, a part of the part which cannot be reproduced by photocopying of a document obtained by a second mode of implementation of the method. This mode consists in depositing on a support l, white or colored, first a single layer 4, of dark color, on which a single layer 2 is then deposited containing at least one iridescent substance and, on it, layers 3 of dark color, in the form of desired alpha-numeric or graphic information. The presence of layer 4 enhances the effect of the iridescent substance or substances contained in layer 2, so that a photocopy of the document thus obtained will be even darker than that of the document shown in FIG. 1, hence greater security against any improper reproduction.

La figure 3 représente,en coupe,une partie de la par­tie non reproductible par photocopie d'un document obtenu par un troisième mode de mise en oeuvre du procédé.Ce mode consiste à déposer sur un support l,blanc ou coloré, des couches 3,de couleur foncé,en forme d'informations désirées.On dépose ensuite par-dessus des couches 3,au moyen d'un adhésif autocollant 5,une couche unique 2 con­tenant au moins une substance iridescente,préalablement déposée sur une face d'un film transparent 6.L'ensemble formé du film 6,de la couche 2 et de l'adhésif 5,préparé à l'avance en enduisant une face du film 6 de la couche 2,puis celle-ci d'une couche d'adhésif 5,est laminé sur le support l.Ce mode de mise en oeuvre du procédé se prête donc particulièrement à la protection contre la reproduction d'un document existant.En utilisant un adhé­sif repositionable,un document existant reproductible par photocopie,peut être rendu,en entier ou en partie,non reproductible puis de nouveau reproductible.FIG. 3 represents, in section, a part of the part which cannot be reproduced by photocopying a document obtained by a third mode of implementation of the method. This mode consists in depositing layers 3, white or colored, , dark in color, in the form of desired information. Then, over layers 3, by means of a self-adhesive adhesive 5, a single layer 2 containing at least one iridescent substance, previously deposited on one side of a layer, is deposited. transparent film 6. The assembly formed of film 6, layer 2 and adhesive 5, prepared in advance by coating one face of film 6 with layer 2, then this one with a layer of adhesive 5, is laminated to the support 1. This mode of implementation of the method therefore lends itself particularly to protection against reproduction of an existing document. By using a repositionable adhesive, an existing document reproducible by photocopy, can be rendered , in whole or in part, not reproducible and then reproducible again.

La figure 4 représente,en coupe,une partie de la par­tie non reproductible par photocopie d'un document obtenu par un quatrième mode de mise en oeuvre du procédé.Ce mode consiste à déposer sur un support l,blanc ou coloré, une couche unique 3,de couleur foncée,puis de déposer,sur cette couche 3,des couches 2 contenant au moins une sub­stance iridescente,en forme d'informations alpha-numé­riques ou graphiques désirées.En l'occurrence,les couches 2 sont formées par impression au moyen d'une encre com­ prenant au moins un pigment iridescent.Elles peuvent aussi être formées par xérographie,chacune au moyen d'une couche de toner en poudre sur laquelle est transférée thermiquement,à partir d'un film spécial,la couche conte­nant au moins une substance iridescente.Un tel procédé de transfert est commercialisé par Omnicrom Systems Ltd., GB-Bolton.La photocopie d'un document obtenu par ce mode de mise en oeuvre du procédé,donne une surface noire sans trace d'image.FIG. 4 represents, in section, a part of the non-reproducible part by photocopying of a document obtained by a fourth mode of implementation of the method. This mode consists in depositing on a white or colored support, a single layer 3, dark in color, then deposit, on this layer 3, layers 2 containing at least one iridescent substance, in the form of desired alpha-numeric or graphic information. In this case, the layers 2 are formed by printing at using com ink taking at least one iridescent pigment. They can also be formed by xerography, each by means of a layer of powder toner to which the layer containing at least one iridescent substance is thermally transferred, from a special film. such transfer process is marketed by Omnicrom Systems Ltd., GB- Bolton. Photocopying a document obtained by this mode of implementation of the process, gives a black surface with no image trace.

Claims (8)

l.Procédé de fabrication d'un document comprenant un support portant des informations alpha-numériques ou gra­phiques,dont au moins une partie est non reproductible par photocopie,caractérisé par le fait que l'on forme sur la surface de la partie non reproductible du support(1)de document des plages adjacentes par le dépôt de couches(2)contenant au moins une substance iridescente et de couches(3)de couleur foncée.l.Process for manufacturing a document comprising a medium carrying alpha-numeric or graphic information, at least part of which is not reproducible by photocopying, characterized in that the non-reproducible part of the film is formed on the surface support (1) for documenting adjacent areas by depositing layers (2) containing at least one iridescent substance and layers (3) of dark color. 2. Procédé selon la revendication l,caracté­risé par le fait que l'on dépose des couches(2)conte­nant au moins une substance iridescente,en forme d'une couche unique sur toute la surface de la partie non re­productible d'un support(l)blanc ou coloré et que l'on dépose sur cette couche unique(2) des couches(3)de couleur foncée,en forme d'informations alpha-numériques ou gra­phiques.2. The method of claim l, characterized in that the depositing of the layers (2) containing at least one iridescent substance, in the form of a single layer over the entire surface of the non-repeatable portion of a support ( l) white or colored and which is deposited on this single layer (2) layers (3) of dark color, in the form of alpha-numeric or graphic information. 3. Procédé selon la revendication 2,caracté­risé par le fait que l'on dépose la couche unique(2) sue le support(l) par-dessus d'une couche(4)de couleur foncée préalablement déposée sur le support(l).3. A method according to claim 2, characterized in that the single layer is deposited (2) sue the carrier (s) over a layer (4) of dark color previously deposited on the substrate (l) . 4. Procédé selon la revendication l,caracté­risé par le fait que l'on dépose sur la surface de la partie non reproductible d'un support(l)blanc ou coloré des couches(3)de couleur foncée,en forme d'informations alpha-numériques ou graphiques et que l'on dépose ensuite sur le support(1),par-dessus des couches(3)de couleur foncée,au moyen d'un adhésif autocollant(5),une couche unique(2)contenant au moins une substance iridescente, préalablement déposée sur un film(6)transparent.4. The method of claim l, characterized in that one deposits on the surface of the non-repeatable portion of a support (s) white or colored layer (3) of dark color, in the form of information alpha -digital or graphic and which are then deposited on the support (1), over layers (3) of dark color, by means of a self-adhesive adhesive (5), a single layer (2) containing at least an iridescent substance, previously deposited on a transparent film (6). 5. Procédé selon la revendication l,caracté­risé par le fait que l'on dépose sur toute la surface de la partie non reproductible d'un support(l)blanc ou coloré une couche unique(3) de couleur foncée sur laquelle on dépose ensuite,en forme d'informations alpha-numériques ou graphiques,des couches(2)contenant au moins une sub­ stance iridescente.5. The method of claim l, characterized in that it is deposited over the entire surface of the non-repeatable portion of a support (s) a single white or colored layer (3) dark on which is then deposited , in the form of alphanumeric or graphic information, layers (2) containing at least one sub iridescent stanza. 6. Procédé selon l'une des revendications précédentes, caractérisé par le fait qu'au moins une des sub­stances iridescentes est un pigment iridescent à éclat coloré.6. Method according to one of the preceding claims, characterized in that at least one of the iridescent substances is an iridescent pigment with colored radiance. 7. Procédé selon l'une des revendications précédentes, caractérisé par le fait que la couche (2) conte­nant au moins une substance iridescente est déposée en forme de trame.7. Method according to one of the preceding claims, characterized in that the layer (2) containing at least one iridescent substance is deposited in the form of a frame. 8. Document obtenu selon l'une des revendications précédentes.8. Document obtained according to one of the preceding claims.
EP88810785A 1987-11-20 1988-11-16 Process for producing a document of which at least a part is not reproducible by means of photocopying Expired - Lifetime EP0317514B1 (en)

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CH4518/87 1987-11-20
CH4518/87A CH672687A5 (en) 1987-11-20 1987-11-20

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EP0657297A1 (en) * 1993-12-10 1995-06-14 Agfa-Gevaert N.V. Security document having a transparent or translucent support and containing interference pigments.
EP0775589A1 (en) * 1995-11-23 1997-05-28 Agfa-Gevaert N.V. Laminated security document containing fluorescent dye
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JPH01155381A (en) 1989-06-19
EP0317514B1 (en) 1992-07-22
DE3873034D1 (en) 1992-08-27
US5087507A (en) 1992-02-11
CH672687A5 (en) 1989-12-15
AU2569788A (en) 1989-05-25
DE3873034T2 (en) 1993-02-11

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