EP3219508B1 - Élément de sécurité et support de données - Google Patents

Élément de sécurité et support de données Download PDF

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Publication number
EP3219508B1
EP3219508B1 EP17000412.1A EP17000412A EP3219508B1 EP 3219508 B1 EP3219508 B1 EP 3219508B1 EP 17000412 A EP17000412 A EP 17000412A EP 3219508 B1 EP3219508 B1 EP 3219508B1
Authority
EP
European Patent Office
Prior art keywords
security element
data carrier
viewed
transparent
semi
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP17000412.1A
Other languages
German (de)
English (en)
Other versions
EP3219508A1 (fr
Inventor
Anja PFAFF
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient Currency Technology GmbH
Original Assignee
Giesecke and Devrient Currency Technology 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.)
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Publication date
Application filed by Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Publication of EP3219508A1 publication Critical patent/EP3219508A1/fr
Application granted granted Critical
Publication of EP3219508B1 publication Critical patent/EP3219508B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • 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
    • B42D25/23—Identity cards
    • 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
    • B42D25/324—Reliefs
    • 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
    • B42D25/328—Diffraction gratings; Holograms
    • 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
    • B42D25/355—Security threads
    • 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
    • B42D25/373—Metallic 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

Definitions

  • the invention relates to a security element and a data carrier equipped with the security element, e.g. a value document such as a banknote.
  • Data carriers such as documents of value or identity documents, or other valuable objects, such as branded articles, are often provided with security elements for security purposes, which allow the authenticity of the data carriers to be checked and which at the same time serve as protection against unauthorized reproduction.
  • (see-through) security elements with multilayer thin-film elements which appear in a first color when viewed in incident light, ie in reflection, and appear in a second color when viewed in transmitted light, ie in transmission.
  • the WO 2011/082761 A1 describes a thin-film element with a multi-layer structure that appears golden when viewed in incident light and blue when viewed in transmitted light.
  • the multilayer structure is based on two semi-transparent mirror layers and a dielectric spacer layer arranged between the two mirror layers.
  • the WO 2011/064162 A2 describes the production of a hologram, in which a substrate is provided with a coating composition, in particular a metallic color, which comprises platelet-shaped transition metal particles.
  • the hologram shows different colors in reflection and in transmission.
  • the US 2015/0152602 A1 describes a security document with a watermark and a micro-optical security device that at least partially covers the watermark.
  • the WO 2008/061930 A1 describes an apparatus and method for creating a security product wherein an optically variable image is formed on a substrate by applying a curable compound or composition to the substrate, contacting a device for creating the optically variable image, and curing .
  • a metallic paint can optionally be deposited on the hardened connection.
  • the object of the invention is to provide a security element of the type mentioned at the outset with a high level of security against forgery and an attractive visual appearance.
  • the window area can in particular by means of a recess or opening in the data carrier substrate, e.g. a paper substrate.
  • the document of value mentioned in the present description can be a bank note, in particular a paper bank note, a polymer bank note or a composite film bank note, a share, a bond, a certificate, a voucher, a check, a high-quality admission card, but also an identification card , such as a credit card, bank card, cash payment card, authorization card, ID card or passport personalization page.
  • a bank note in particular a paper bank note, a polymer bank note or a composite film bank note, a share, a bond, a certificate, a voucher, a check, a high-quality admission card, but also an identification card , such as a credit card, bank card, cash payment card, authorization card, ID card or passport personalization page.
  • viewing in incident light is lighting the security element from one side and viewing the security element from the same side.
  • An observation in incident light is thus, for example, when the front of the security element is illuminated and also viewed.
  • viewing in transmitted light is illumination of a security element from one side and viewing the security element from another side, in particular the opposite side.
  • a reflection in transmitted light is thus, for example when the back of the security element is illuminated and the front of the security element is viewed. The light shines through the security element.
  • the security element according to the invention can e.g. as a patch or label, as an (endless) strip or as an (endless) thread.
  • the data carrier substrate of the data carrier to be equipped with the security element according to the invention is in particular a paper substrate or a paper-like substrate, a polymer substrate, a paper / film / paper composite substrate or a film / paper / film composite substrate.
  • a windowed security document or security paper may e.g. in the case of a paper substrate, a paper / film / paper composite substrate or a film / paper / film composite substrate by means of a continuous recess within the paper layer (s).
  • the paper layer can be coated with a suitable liquid, e.g. be made transparent in a certain area by means of an aqueous sulfuric acid solution.
  • a window area e.g. by means of congruent cutouts in the opaque print layers applied to the front and back of the polymer substrate.
  • the semi-transparent metallic layer which appears in the first visually recognizable color when viewed in reflected light, is an aluminum layer.
  • the first visually recognizable color is silver.
  • the layer thickness of the semi-transparent metallic layer is preferably in a range from 10 nm to 50 nm, more preferably 20 nm to 40 nm and particularly preferably 25 nm to 35 nm.
  • the layer thickness of the semi-transparent metallic layer is, for example, 28 nm.
  • the semitransparent functional layer which is technically obtainable by means of an effect pigment composition, appears in a second, visually recognizable color when viewed in incident light, and in a third, visually recognizable when viewed in transmitted light, both from the front and from the rear Color appears, for example, has the following reflected light / transmitted light color change: gold / blue color change, metallic pink / blue color change.
  • Print layers based on an effect pigment composition which shows a different color when viewed in reflected light than when viewed in transmitted light, in particular a gold / blue color change, for example in the WO 2011/064162 A2 described.
  • the pigments preferably have a longest dimension ("longest dimension of edge length") from end to end in a range from 15 nm to 1000 nm and are based on a transition metal selected from the group consisting of Cu, Ag, Au, Zn, Cd, Ti, Cr, Mn, Fe, Co, Ni, Ru, Rh, Pd, Os, Ir and Pt is selected.
  • the transition metal is preferably Ag, ie silver.
  • the aspect ratio ie the ratio of the longest end-to-end dimension based on the thickness) is preferably at least 1.5, in particular in a range from 1.5 to 300.
  • the ratio of the binder to the metal pigment is preferably below 10: 1, especially below 5: 1.
  • the color when viewing the printing layer in transmission and the color when viewing in reflection can be adjusted.
  • the effect pigment composition for producing the semi-transparent functional layer also contains a binder in addition to the pigments. It is further preferred that the binder is based on cellulose nitrate.
  • a cellulose nitrate as a binder-containing lacquer is understood here to mean a nitrocellulose lacquer.
  • a golden color in reflected light using a nitrocellulose lacquer containing effect pigments (for example silver pigments) with a wet film thickness of 24 micrometers (corresponds to 0.9 g / m 2 ) and a blue color in transmitted light, and by means of an effect pigment (eg silver pigments) containing nitrocellulose lacquers with a wet film thickness of 12 micrometers (corresponds to 0.2 g / m 2 ) to produce a pink metallic color in reflected light and a blue color in transmitted light.
  • effect pigments for example silver pigments
  • an effect pigment eg silver pigments
  • the optionally available adhesive layer e) can alternatively be applied to the transparent carrier substrate a) (ie on the side of the carrier substrate a)) opposite the optionally available embossing lacquer layer b).
  • Fig. 1 shows the schematic structure of a data carrier according to the invention, namely a bank note 1 with the denomination "20", which is provided with a patch-shaped security element 2.
  • the banknote substrate is a paper substrate which has a cutout or opening in the dashed area 3, which can be obtained, for example, by means of punching or laser cutting. Furthermore, the paper substrate is thinned within area 2.
  • the block arrow 5 represents the view of the security element 2 (or the data carrier 1) from the front
  • the block arrow 6 represents the view of the security element 2 (or the data carrier 1) from the back.
  • the layer thickness of the semitransparent functional layer 23 is 24 micrometers (corresponds to a wet film thickness of 0.9 g / m 2 ).
  • the functional layer 23 is gold-colored when viewed in incident light and bluish when viewed in transmitted light.
  • Figure 3 shows the security element area of the in the Figure 1 shown data carrier 1 when viewed from the front (ie in the direction of the block arrow 5 of the Figure 2 ) in incident light.
  • the viewer perceives the semi-transparent functional layer 23 of the security element 2 homogeneously in a golden, metallic color.
  • Figure 4 shows the security element area of the in the Figure 1 shown data carrier 1 when viewed from the front (ie in the direction of the block arrow 5 of the Figure 2 ) in transmitted light.
  • the viewer perceives the semitransparent functional layer 23 of the security element 2 in a bluish color, the security element 2 in the edge area 7, ie in the area of the thinned paper has a weaker bluish tint and has a stronger bluish tint in the central area 8, ie in the recessed area of the paper.
  • Figure 5 shows the security element area of the in the Figure 1 shown data carrier 1 when viewed from the rear (ie in the direction of the block arrow 6 of the Figure 2 ) in incident light. The viewer perceives the semi-transparent aluminum layer 22 of the security element 2 homogeneously in silver color.
  • Figure 6 shows the security element area of the in the Figure 1 shown data carrier 1 when viewed from the rear (ie in the direction of the block arrow 6 of the Figure 2 ) in transmitted light.
  • the viewer perceives the semitransparent functional layer 23 of the security element 2 through the layers 21 and 22 in a bluish color, the security element 2 having a weaker bluish color in the edge area 9, ie in the area of the thinned paper, and in the central area 10, ie in the recessed area of the paper, has a stronger bluish tint.
  • Fig. 1 shows the schematic structure of a data carrier according to the invention, namely a bank note 1 with the denomination "20", which is provided with a patch-shaped security element 2.
  • the banknote substrate is a paper substrate which has a cutout or opening in the dashed area 3, which can be obtained, for example, by means of punching or laser cutting. Furthermore, the paper substrate is thinned within area 2.
  • the block arrow 5 represents the viewing of the security element 2 (or the data carrier 1) from the front
  • the block arrow 6 represents the viewing of the security element 2 (or the data carrier 1) from the back.
  • the layer thickness of the semitransparent functional layer 23 is 12 micrometers (corresponds to a wet film thickness of 0.2 g / m 2 ).
  • the functional layer 23 is pink-metallic when viewed in incident light and bluish when viewed in transmitted light.
  • Figure 3 shows the security element area of the in the Figure 1 shown data carrier 1 when viewed from the front (ie in the direction of the block arrow 5 of the Figure 2 ) in incident light.
  • the viewer perceives the semitransparent functional layer 23 of the security element 2 homogeneously in a pink, metallic color.
  • Figure 4 shows the security element area of the in the Figure 1 shown data carrier 1 when viewed from the front (ie in the direction of the block arrow 5 of the Figure 2 ) in transmitted light.
  • the viewer perceives the semitransparent functional layer 23 of the security element 2 in a bluish color, the security element 2 having a weaker bluish color in the edge region 7, ie in the area of the thinned paper, and a stronger one in the central area 8, ie in the recessed area of the paper bluish hue.
  • Figure 5 shows the security element area of the in the Figure 1 shown data carrier 1 when viewed from the rear (ie in the direction of the block arrow 6 of the Figure 2 ) in incident light. The viewer perceives the semi-transparent aluminum layer 22 of the security element 2 homogeneously in silver color.
  • Figure 6 shows the security element area of the in the Figure 1 shown data carrier 1 when viewed from the rear (ie in the direction of Block arrow 6 of the Figure 2 ) in transmitted light.
  • the viewer perceives the semitransparent functional layer 23 of the security element 2 through the layers 21 and 22 in a bluish color, the security element 2 having a weaker bluish color in the edge area 9, ie in the area of the thinned paper, and in the central area 10, ie in the recessed area of the paper, has a stronger bluish tint.

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  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)

Claims (14)

  1. Élément de sécurité (2) destiné à la sécurisation de documents de valeur (1), comprenant un substrat porteur (21) transparent, une couche métallique (22) semi-transparente, à savoir une couche d'aluminium qui, lors d'une observation en lumière incidente, apparaît dans une première couleur visuellement reconnaissable, à savoir argentée, et une couche fonctionnelle (23) semi-transparente définissant la face avant de l'élément de sécurité (2) et pouvant être obtenue par impression au moyen d'une composition à pigments à effets, laquelle, lors d'une observation en lumière incidente, apparaît dans une deuxième couleur visuellement reconnaissable, et, lors d'une observation de l'élément de sécurité (2) en lumière transmise, tant depuis la face avant que depuis la face arrière, apparaît dans une troisième couleur visuellement reconnaissable, cependant que l'élément de sécurité (2) comporte, dans l'ordre, la disposition en couches suivante :
    - substrat porteur (21) transparent ;
    - couche métallique (22) semi-transparente ;
    - couche fonctionnelle (23) semi-transparente.
  2. Élément de sécurité (2) selon la revendication 1, cependant que la composition à pigments à effets est basée sur un liant et sur des pigments qui, de bout en bout, présentent une dimension la plus longue comprise entre 15 nm et 1000 nm et reposent sur un métal de transition choisi dans le groupe constitué par Cu, Ag, Au, Zn, Cd, Ti, Cr, Mn, Fe, Co, Ni, Ru, Rh, Pd, Os, Ir et Pt.
  3. Élément de sécurité (2) selon la revendication 2, cependant que la composition à pigments à effets est basée sur un liant et sur des pigments argentés.
  4. Élément de sécurité (2) selon la revendication 2 ou 3, cependant que le liant repose sur nitrate de cellulose.
  5. Élément de sécurité (2) selon une des revendications de 1 à 4, cependant que
    - l'élément de sécurité (2), lors d'une observation de la couche métallique (22) semi-transparente en lumière incidente, apparaît argenté ;
    - l'élément de sécurité (2), lors d'une observation de la couche fonctionnelle (23) semi-transparente en lumière incidente, apparaît doré ; et
    - l'élément de sécurité (2), lors d'une observation en lumière transmise, depuis la face avant ou depuis la face arrière, apparaît bleuâtre.
  6. Élément de sécurité (2) selon une des revendications de 1 à 4, cependant que
    - l'élément de sécurité (2), lors d'une observation de la couche métallique (22) semi-transparente en lumière incidente, apparaît argenté ;
    - l'élément de sécurité (2), lors d'une observation de la couche fonctionnelle (23) semi-transparente en lumière incidente, apparaît métallique rosé ; et
    - l'élément de sécurité (2), lors d'une observation en lumière transmise, depuis la face avant ou depuis la face arrière, apparaît bleuâtre.
  7. Élément de sécurité (2) selon une des revendications de 1 à 6, cependant que la couche fonctionnelle (23) semi-transparente est générée sous forme de caractères ou sous forme d'un motif.
  8. Élément de sécurité (2) selon une des revendications de 1 à 7, cependant que, entre le substrat porteur (21) transparent et la couche fonctionnelle (23) semi-transparente, il y a une couche de vernis de gaufrage qui présente en particulier une structure en relief constituant une structure diffractive et/ou une structure en relief constituant un agencement de micro-miroirs.
  9. Support de données (1) axant un élément de sécurité (2) selon une des revendications de 1 à 8.
  10. Support de données (1) selon la revendication 9, cependant que le support de données (1) est un document de valeur tel qu'un billet de banque, en particulier un billet de banque en papier, un billet de banque en polymère ou billet de banque en film composite , ou une carte d'identification.
  11. Support de données (1) selon la revendication 9 ou 10, cependant que l'élément de sécurité (2) est agencé au-dessus d'une zone fenêtre (3) constituée dans le substrat du support de données (4).
  12. Support de données (1) selon une des revendications de 9 à 11, cependant que le substrat du support de données (4) présente dans la zone de l'élément de sécurité des zones à transmission de lumière accrue et des zones à transmission de lumière réduite.
  13. Support de données (1) selon la revendication 12, cependant que le substrat du support de données (4) est un substrat en papier et que les zones à transmission de lumière accrue sont constituées au moyen de zones de papier amincies et les zones à transmission de lumière réduite sont constituées au moyen de zones de papier épaissies.
  14. Support de données (1) selon la revendication 12, cependant que les zones à transmission de lumière réduite sont constituées par des zones du substrat du support de données (4) imprimées avec de l'encre opaque, et que les zones à transmission de lumière accrue sont des zones du substrat du support de données (4) non imprimées.
EP17000412.1A 2016-03-15 2017-03-14 Élément de sécurité et support de données Active EP3219508B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016003188.3A DE102016003188A1 (de) 2016-03-15 2016-03-15 Sicherheitselement und Datenträger

Publications (2)

Publication Number Publication Date
EP3219508A1 EP3219508A1 (fr) 2017-09-20
EP3219508B1 true EP3219508B1 (fr) 2020-05-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17000412.1A Active EP3219508B1 (fr) 2016-03-15 2017-03-14 Élément de sécurité et support de données

Country Status (2)

Country Link
EP (1) EP3219508B1 (fr)
DE (1) DE102016003188A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2009123538A (ru) * 2006-11-21 2010-12-27 Циба Холдинг Инк. (Ch) Устройство и способ изготовления защищенного от подделки изделия
US9453132B2 (en) 2009-11-27 2016-09-27 Basf Se Coating compositions for security elements and holograms
DE102009056933A1 (de) * 2009-12-04 2011-06-09 Giesecke & Devrient Gmbh Sicherheitselement mit Farbfilter, Wertdokument mit so einem solchen Sicherheitselement sowie Herstellungsverfahren eines solchen Sicherheitselementes
DE102009058243A1 (de) 2009-12-14 2011-06-16 Giesecke & Devrient Gmbh Dünnschichtelement mit Mehrschichtstruktur
US9708773B2 (en) * 2011-02-23 2017-07-18 Crane & Co., Inc. Security sheet or document having one or more enhanced watermarks

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
EP3219508A1 (fr) 2017-09-20
DE102016003188A1 (de) 2017-09-21

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