WO2005061242A1 - Element de securite et procede de production associe - Google Patents

Element de securite et procede de production associe Download PDF

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Publication number
WO2005061242A1
WO2005061242A1 PCT/EP2004/014236 EP2004014236W WO2005061242A1 WO 2005061242 A1 WO2005061242 A1 WO 2005061242A1 EP 2004014236 W EP2004014236 W EP 2004014236W WO 2005061242 A1 WO2005061242 A1 WO 2005061242A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
security element
reflective
relief structures
colored lacquer
Prior art date
Application number
PCT/EP2004/014236
Other languages
German (de)
English (en)
Inventor
Michael Böhm
Friedrich Kretschmar
Original Assignee
Giesecke & Devrient Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke & Devrient Gmbh filed Critical Giesecke & Devrient Gmbh
Priority to DE112004002006.9T priority Critical patent/DE112004002006B4/de
Publication of WO2005061242A1 publication Critical patent/WO2005061242A1/fr

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
    • G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
    • G06K19/16—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards the marking being a hologram or diffraction grating
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
    • G06K19/06046—Constructional details
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/003—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using security elements
    • G07D7/0032—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using security elements using holograms

Definitions

  • the invention relates to a multi-layer security element with diffraction optically effective relief structures as well as a security paper and a value document with such a security element. Furthermore, the invention relates to a transfer element for transferring the security element to the security paper or value document. The invention further relates to a method for producing the security element.
  • a "document of value” is a document that has been completed for its intended use. This can be, for example, a printed security paper, an identification card made of plastic or another document that requires security. Valued documents in the sense of the present invention are therefore in particular banknotes, check forms, shares, ID cards, passports, credit cards, tickets, tickets, entrance tickets and other documents and documents as well as labels, seals, packaging and other elements for product security.
  • Semi-finished products for the production of the aforementioned value documents include, for example, unprinted security papers and other unprinted value document substrates, in particular made of paper or plastic.
  • security paper refers to the unprinted paper which, in addition to the security element according to the invention, can have further authenticity features, such as luminescent substances provided in the volume, a security thread or the like.
  • Security paper is usually present in a virtually endless form and becomes available at a later point in time further processed. In the production of such documents of value and security papers, it is particularly important to take precautions against falsification and / or measures to determine the authenticity. In addition to the features that are particularly recognizable when testing by machines, there are also features that can be recognized as authenticity features by anyone without technical aids and without special specialist knowledge.
  • So security elements are often equipped with security features in the form of diffraction optically effective relief structures, such as. B. with conventional holograms or lattice structures such as Kinegram ® and pixel grams and the like. The protection against forgery of these elements is based on the play of colors that these elements show, depending on the viewing angle.
  • Such security elements are often applied in the form of film strips or film labels on the surface of documents of value.
  • the security features are first produced by converting the diffraction structures into a relief structure, which is then used as an embossing stamp.
  • the embossing is usually carried out in a thermoplastic layer or in a lacquer or resin layer that is curable during the embossing process.
  • these layers are provided with a reflection layer before or usually after the embossing process.
  • opaque security elements it is a thin, e.g. B. vapor-deposited metal layer, with transparent security elements around a dielectric layer, as described for example in DE 41 30896 AI.
  • common to these security elements is that the embossed structures can only be visually perceived by an observer using one or more reflection layers.
  • the security element can be generated directly on the value document or security paper or integrated into the structure as a separately producible element or applied subsequently. It can e.g. B. is a security thread, which consists of a self-supporting plastic film. This security thread can be partially inserted in a security paper or value document. However, it is also possible to design the security element in the form of a tape or label and to fasten it on the surface of the security paper or value document.
  • Various methods are known for applying such optically variable elements, in particular holograms, to data carriers. They can be divided into the three categories of gluing, transfer printing and embossing and are explained in more detail in EP 0440 045 A2.
  • the adhesive labels When gluing, self-adhesive labels, which are initially pre-punched on silicone paper, are mechanically transferred to the paper substrate.
  • the adhesive labels have a layer structure, which is composed of a pressure-sensitive adhesive layer, a self-supporting film with an optically active layer over, for example, a diffraction grating and, if appropriate, an overlying protective layer.
  • the thickness of an adhesive label is typically around 50 micrometers, the major part of the thickness being attributable to the film material.
  • the optically variable element is prefabricated on a transfer belt and transferred to the substrate in a subsequent step.
  • the structure of the security element transferred onto the paper typically has a thickness in the range of a few micrometers.
  • the usual layer structure of the security element consists of a hot adhesive layer, a lacquer layer with embossing, a vapor-deposited aluminum layer and one transparent protective cover. This layer structure is initially on the transfer film, whereby it has a release layer, for. B. a wax adheres to the film.
  • a “transfer element” is therefore a security element that is prepared on a separate carrier layer in the reverse order of how it will later lie on the security paper and then by means of an adhesive layer, for example an adhesive or lacquer layer.
  • an adhesive layer for example an adhesive or lacquer layer.
  • the desired outline contours are transferred to the security paper or value document.
  • the separate carrier layer can then be removed from the layer structure of the security element after the transfer.
  • the carrier layer can be used as
  • Protective layer as an integral part of the security element remain on the layer structure.
  • the production of such a transfer element and the transfer to a substrate are described, for example, in GB 2129 739 B.
  • the embossing process - as the third category for applying optically variable elements to data carriers - is particularly suitable for diffraction elements such as holograms and optical gratings.
  • a substrate for. B. security paper or document of value
  • a layer of a curable lacquer applied which is preferably provided with an extremely thin and reflective metal surface.
  • the diffractive relief structure is embossed into the lacquer layer with an embossing stamp and after the lacquer has hardened, the structure is covered with a protective lacquer.
  • the finished element has a layer structure that consists of the successive the layers of lacquer with metal layer and relief structure as well as the protective lacquer layer.
  • the object of the present invention is therefore to increase the conspicuity of such security elements so that they are increasingly recognized as security elements so that they again offer a higher level of protection against counterfeiting.
  • this object is achieved by a security element, transfer element, security paper and value document as well as by a method with the features of the independent claims.
  • a transparent or at least translucent colored lacquer layer is provided between the layer having the diffraction-optically effective relief structures and the adjacent reflection layer.
  • a layer is referred to as “translucent” which is not 100% translucent and preferably has a light transmittance of less than 90%, particularly preferably between 80% and 20%.
  • the security element in this should be provided with the colored lacquer layer Diffraction optically effective. The latter can be achieved in a simple manner by the surface of the diffraction layer having optically active relief structures in the area provided with the colored lacquer layer has no diffraction-optical relief structures.
  • Two different, adjacent surface types are thus created, a first surface type with optically variable effects due to the diffraction-optical relief structures that change when the viewing and / or lighting angle changes, and a second surface type that always gives the same color impression regardless of the viewing and lighting angle ,
  • These non-holographic areas of the second type of surface thus represent "resting" elements within or next to the holographic areas of the first type of surface.
  • the colored lacquer layer areas of the second type of surface provide a brilliant color impression.
  • the colored lacquer layer areas of the security element are therefore special for the viewer striking and therefore particularly suitable for drawing the viewer's attention to the neighboring information conveyed by the relief structures, resulting overall in a striking visual effect.
  • the colored lacquer layer is preferably arranged in register with the relief structures having an optical diffraction effect, * ie the colored lacquer layer directly adjoins the relief structures having an optical diffraction effect when viewed under supervision.
  • the visual effects of the relief structures immediately adjacent to the colored lacquer layer are visually emphasized and even more striking for the viewer.
  • the register-based arrangement of the individual areas is technically difficult and can only be realized with considerable technical effort, so that the security against forgery is thereby additionally increased.
  • the visual emphasis of the relief structure areas should nevertheless be achieved by an immediately adjacent, visually conspicuous colored lacquer layer, this is according to a preferred one Variant of the present invention is possible in a production-technically less complicated way if the refractive indices of the colored lacquer layer on the one hand and the layer having the diffraction-optical relief structures on the other hand differ by 0.3 or less, preferably by 0.1 or less.
  • the reflective coating which increases the brilliance of the overlying colored lacquer layer areas as well as the optically variable relief structure areas when looking at the security element from above, does not have to be present over the entire surface.
  • the reflection layer can only be present in certain areas. This is particularly useful for security elements that are not only viewed under supervision, but also in transmitted light.
  • cutouts are made in the reflective layer. This can, for example, be any characteristic pattern or plain text information.
  • the cutouts are preferably produced by means of a washing process described in WO 99/13157 or one of the numerous demetallization processes mentioned in the same publication.
  • the portion of the reflection layer to be removed is printed with a porous, soluble printing ink, which is removed in a later process step with the reflection layer produced in this portion using a solvent.
  • the washing process has the advantage that the recesses can be created with a special contour sharpness.
  • cutouts in the reflection layer can be produced using an etching printing ink, with the aid of which a printed image is printed on the reflection layer. After a sufficient exposure time, the caustic printing ink can be washed off together with the areas of the reflection layer that have been dissolved or dissolved.
  • a protective layer can be printed on the reflection layer, with the exception of the areas to be removed later, and the reflection layer can then be removed in the unprotected areas.
  • An etch-resistant printing ink is advantageously applied as a protective layer, and the reflective layer is etched away in the unprinted areas, in particular using an alkali or an acid.
  • a metal layer serving as a reflection layer is in the form of the remaining one Parts printed with an organically soluble ink.
  • the evaporated metal layer is switched as an anode and fed to a first galvanic bath.
  • the metal of the vapor-deposited layer dissolves in the unprinted areas (anodic oxidation).
  • the printing ink is removed or dissolved by an organic solvent
  • Laser ablation or the process of electro-erosion offer further preferred possibilities for producing cutouts in the reflection layer.
  • a laser beam of sufficient energy density is guided over the areas of the reflection layer to be ablated.
  • the cutouts in the reflection layer can be present both in the colored lacquer layer areas and in the relief structure areas or also in a manner that spans these areas.
  • the layer having the diffraction-optical relief structures can be a plastic film or a lacquer layer on a substrate, into which the relief structures are each embossed.
  • the security element can be designed as a self-supporting element, for example in the form of a label or security thread and applied to a value document or embedded in a value document, or it can be part of a transfer element as a non-self-supporting security element.
  • the substrate serves as a carrier layer of the security element and, when the security element is transferred to a security paper or document of value, can either be subtracted from the layer structure or can also be transferred as a protective layer for the security element.
  • the security papers and documents of value made of paper or plastic mentioned at the outset are suitable for application or integration of the security element according to the invention.
  • FIG. 2 shows a cross section through the document of value from FIG. 1 along the line A-A
  • FIG. 3 shows a cross section through a transfer element before transfer to a security paper or document of value
  • FIGS. 4A and 4B shows a detailed view of the security element of the chip card from FIGS. 4A and
  • FIG. 5 shows a cross section through the security element from FIG. 4B along the line BB as a transfer element to be transferred to the chip card.
  • 1 shows a top view of a document of value 1, for example a bank note, with a strip-shaped security element 2 applied in the transfer process.
  • the security element has a hologram or diffraction pattern 3 with a centrally arranged “colored metal mirror” 4.
  • the colored metal mirror 4 becomes generated by a translucent colored paint in front of a reflective metal layer
  • FIG. 2 shows a cross section through the document of value 1 from FIG. 1 along the line A-A in the area of the strip-shaped security element 2.
  • the security element 2 comprises an adhesive layer 6, by means of which it is fixed on a substrate 5.
  • the substrate 5 can be, for example, paper, in particular banknote paper.
  • the security element 2 comprises a lacquer layer 7 with a surface 8 facing the adhesive layer 6, into which relief structures 9 having an optical diffraction effect are embossed, a metal layer 10 which in this case covers the entire surface between the lacquer layer 7 and the adhesive layer 6 is present, and a protective layer 11, which protects the security element 2 against external influences.
  • a colored lacquer 12 forming the colored metal mirror 4 is present in a limited area and adjoins the relief structure 9 in precise register.
  • the substrate 5 can be a plastic film; paper, in particular banknote paper based on cotton fiber, plastic cards or composite materials can also serve as a substrate.
  • the adhesive used in the adhesive layer 6 is e.g. B. commercial glue for connecting carrier and substrate materials.
  • the adhesive layer 6 is to be chosen so thick that it compensates for unevenness through the embossed relief structure 9 and in particular the thickness of the colored lacquer layer 12.
  • the reflection layer 10 is preferably a metal coating which is evaporated, for example, onto the hardened lacquer layer 7 having the relief structure 9 and the colored lacquer layer 12 provided in certain areas.
  • Aluminum, chromium, copper, gold, tin, silver and alloys thereof can be considered as metals.
  • the colored lacquer layer 12 can consist of the same base material as the lacquer layer 7 having the relief structures, but colored accordingly.
  • the specific composition of the colored lacquer of the colored lacquer layer 12 is not important as long as the colored lacquer is transparent or translucent.
  • the conventional transparent or translucent lacquers suitable for hologram embossing can be used as lacquer for the lacquer layer 7 carrying the relief structure.
  • a plastic film can also be used, into which the diffraction structures are embossed.
  • the protective layer 11 can be a transparent lacquer or a transparent film.
  • FIG. 3 shows a transfer element with a security element 2 similar to the security element 2 shown in FIG. 2, which is present on a carrier layer 13, but in the reverse layer sequence.
  • the security element 2 is produced on the carrier layer 13 by successively applying the individual layers.
  • the plastic layer 11 is applied as a film or varnish to the carrier layer 13, which is previously provided with a wax-containing release layer.
  • a lacquer layer 7 is applied thereon, in the surface of which a relief structure 9 having an optical diffraction effect is embossed in the not yet fully solidified state.
  • the relief structure 9, ie. H. the colored lacquer layer 12 is applied directly adjacent to the relief structure 9. 1 and 2, only a part of the relief structure 9 and the colored lacquer layer 12 are subsequently provided with a metal layer 10, e.g. by means of a washing process before at least the area of the layer structure to be transferred to the substrate is covered with an adhesive layer 6 in a last process step.
  • the relief structure 9 is only in the area of the measurement metal layer 10 produce a brilliant holographic effect and have an optically invariable colored “mirror” in the area of the paint layer 12.
  • the visual perceptibility of the diffraction patterns generated by the relief structure 9 depends on the refractive indices of the adhesive layer 6 and the paint layer 7 The greater the difference in the refractive indices, the more clearly the diffraction pattern becomes visible in this area.
  • Such a security element is therefore also suitable for viewing in transmitted light.
  • the adhesive layer 6 can have its own color, which becomes particularly clear when viewed in transmitted light.
  • the document of value 1 is a chip card with an integrated chip 14 and a security element 2 applied to the surface 15 of the chip card 1.
  • FIG. 4B shows a detailed view of the security element 2 from FIG. 4A in a top view.
  • the security element 2 has a square basic shape with a hologram pattern 16 (“wallpaper pattern”) evenly distributed over the entire surface, consisting of circular, diffraction-optical relief structures 9 with regions 9 ′ in between, which have no diffraction structure.
  • a hologram pattern 16 (“wallpaper pattern”) evenly distributed over the entire surface, consisting of circular, diffraction-optical relief structures 9 with regions 9 ′ in between, which have no diffraction structure.
  • a reflective metal layer 10 is provided in some areas, namely in the form of a square standing on a corner, and consequently the circular diffraction structures 9 can only be seen with brilliance in the area of the metal layer 10.
  • a “colored metal mirror” 4 is in turn realized within the metal layer region 10, between the metal layer 10 and the one below it lying, the layer having the relief structure is a colored lacquer layer which covers the relief structure 9 and the intervening diffraction structure-free regions 9 '.
  • the colored lacquer selected for the colored metal mirror 4 and the lacquer selected for the adjacent lacquer layer having the relief structure 9 have the same possible refractive indices. In the areas in which the colored lacquer layer completely fills the relief structures 9, any diffraction-optical relief structure effects are extinguished.
  • the refractive indices should differ by a maximum of 0.3, preferably by a maximum of 0.1.
  • the structure of the security element 2 from FIG. 4B is explained in more detail below with reference to FIG. 5 in cross section as a transfer element to be transferred to the card body.
  • the transfer element in turn has a carrier layer 13 with the plastic layer 11 which acts as a protective layer after application.
  • the colored lacquer layer 12 partially covers the relief structures 9, in part only partially, and completely fills the relief structures in the covered areas. Because of the similar refractive indices of the colored lacquer layer 12 and the lacquer layer 7 having the relief structure 9, there are no visually conspicuous diffraction-optical effects on the relief structures 9 in the region of the colored lacquer layer 12.
  • the colored lacquer layer 12 as well as parts of the surface 8 of the lacquer layer 7 provided with the circular relief structures 9 are covered with the metal layer 10, which for a brilliant visual appearance of the diffraction optical relief structure effects on the one hand and the colored lacquer layer on the other.
  • the relief structures 9, which have an optical diffraction effect directly adjoin the colored metal mirror, although the colored lacquer layer 12 is not arranged in register with the relief structures 9.
  • this transfer element also has an adhesive layer 6, with which the security element is fixed on the substrate and compensates for any unevenness, for example due to the colored lacquer layer 12.
  • a recess 17 is provided in the metal layer 10 as an additional security feature, which in the exemplary embodiment shown shows concrete information in plain text, namely the letter “A”.
  • the recess 17 is produced in the washing process, as described in WO 99/13157.
  • the letter A is printed on the colored lacquer layer 12 with a color which has a high pigment content and therefore, after drying on the printing substrate, has a raised color application with porous
  • the metal layer 10 of thin thickness applied to this paint application does not result in a continuous, surface-covering coating, but only partially covers the dried paint body because of its large-area porous structure Easily accessible solvent.
  • the paint application and, with the paint application, also the metal layer 10 deposited thereon can be washed out by exposure to a suitable solvent. This can be supported by mechanical means. On Such a process leads to sharp and defined edge contours and is therefore particularly suitable for producing negative writing.

Abstract

L'objectif de l'invention est de renforcer visuellement des structures en relief (9) de diffraction dans un élément de sécurité (2) à plusieurs couches. A cet effet, une couche de laque colorée est disposée sur des parties déterminées entre la couche de réflexion (10) et une surface (8) comportant des structures en relief de diffraction. Cette couche de laque colorée (12) se limite, de préférence, directement par repérage à la structure en relief (9) et elle agit comme un miroir en métal (4) coloré invariable de manière optique. Le même effet est produit, dans un autre mode de réalisation, par une couche de laque colorée (12) et une structure à relief (9) qui se chevauchent, lorsque les indices de réfraction de la couche (7) comportant une structure en relief et de la couche de laque colorée (12) la recouvrant ne se différencient pas ou se différencient très peu.
PCT/EP2004/014236 2003-12-19 2004-12-14 Element de securite et procede de production associe WO2005061242A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112004002006.9T DE112004002006B4 (de) 2003-12-19 2004-12-14 Sicherheitselement und Verfahren zu seiner Herstellung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10360699.8 2003-12-19
DE10360699A DE10360699A1 (de) 2003-12-19 2003-12-19 Sicherheitselement und Verfahren zu seiner Herstellung

Publications (1)

Publication Number Publication Date
WO2005061242A1 true WO2005061242A1 (fr) 2005-07-07

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DE (2) DE10360699A1 (fr)
WO (1) WO2005061242A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2539158B1 (fr) 2010-02-24 2016-04-06 De La Rue International Limited Dispositif de sécurité
WO2020187287A1 (fr) * 2019-03-19 2020-09-24 中钞特种防伪科技有限公司 Élément anti-contrefaçon optique et produit anti-contrefaçon optique
WO2020187285A1 (fr) * 2019-03-19 2020-09-24 中钞特种防伪科技有限公司 Élément anti-contrefaçon optique et produit anti-contrefaçon optique

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129739A (en) 1982-11-08 1984-05-23 American Bank Note Co Processes and products for reproducing light diffracting patterns
EP0440045A2 (fr) 1990-02-01 1991-08-07 GAO Gesellschaft für Automation und Organisation mbH Papier de valeur avec élément de sécurité optiquement variable
DE4130896A1 (de) 1991-01-18 1992-07-23 Landis & Gyr Betriebs Ag Schichtverbund mit beugungsstrukturen
DE4313521C1 (de) * 1993-04-24 1994-06-16 Kurz Leonhard Fa Dekorationsschichtaufbau und dessen Verwendung
EP0680411B1 (fr) * 1992-11-18 1998-02-11 Oesterreichische Nationalbank Document a marque de securite optique dopee, papier composite stratifie utile pour produire le document et dispositif de controle de l'authenticite du document
WO1999013157A1 (fr) 1997-09-08 1999-03-18 Giesecke & Devrient Gmbh Feuilles de securite pour papier billet de banque et leur procede de fabrication
DE10013410A1 (de) * 2000-03-17 2001-09-20 Ovd Kinegram Ag Zug Laminat, insbesondere in Form von Karten, und Verfahren zu dessen Herstellung
DE10226114A1 (de) * 2001-12-21 2003-07-03 Giesecke & Devrient Gmbh Sicherheitselement für Sicherheitspapiere und Wertdokumente
US6602578B1 (en) * 1999-04-09 2003-08-05 Ovd Kinegram Ag Decorative foil

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129739A (en) 1982-11-08 1984-05-23 American Bank Note Co Processes and products for reproducing light diffracting patterns
EP0440045A2 (fr) 1990-02-01 1991-08-07 GAO Gesellschaft für Automation und Organisation mbH Papier de valeur avec élément de sécurité optiquement variable
DE4130896A1 (de) 1991-01-18 1992-07-23 Landis & Gyr Betriebs Ag Schichtverbund mit beugungsstrukturen
EP0680411B1 (fr) * 1992-11-18 1998-02-11 Oesterreichische Nationalbank Document a marque de securite optique dopee, papier composite stratifie utile pour produire le document et dispositif de controle de l'authenticite du document
DE4313521C1 (de) * 1993-04-24 1994-06-16 Kurz Leonhard Fa Dekorationsschichtaufbau und dessen Verwendung
WO1999013157A1 (fr) 1997-09-08 1999-03-18 Giesecke & Devrient Gmbh Feuilles de securite pour papier billet de banque et leur procede de fabrication
US6602578B1 (en) * 1999-04-09 2003-08-05 Ovd Kinegram Ag Decorative foil
DE10013410A1 (de) * 2000-03-17 2001-09-20 Ovd Kinegram Ag Zug Laminat, insbesondere in Form von Karten, und Verfahren zu dessen Herstellung
DE10226114A1 (de) * 2001-12-21 2003-07-03 Giesecke & Devrient Gmbh Sicherheitselement für Sicherheitspapiere und Wertdokumente

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2539158B1 (fr) 2010-02-24 2016-04-06 De La Rue International Limited Dispositif de sécurité
US10112432B2 (en) 2010-02-24 2018-10-30 De La Rue International Limited Security device
WO2020187287A1 (fr) * 2019-03-19 2020-09-24 中钞特种防伪科技有限公司 Élément anti-contrefaçon optique et produit anti-contrefaçon optique
WO2020187285A1 (fr) * 2019-03-19 2020-09-24 中钞特种防伪科技有限公司 Élément anti-contrefaçon optique et produit anti-contrefaçon optique

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DE112004002006D2 (de) 2006-11-02
DE10360699A1 (de) 2005-07-14
DE112004002006B4 (de) 2020-02-06

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