WO2024256867A1 - Structure pour document de sécurité à caractéristiques photochromiques et son procédé de formation - Google Patents

Structure pour document de sécurité à caractéristiques photochromiques et son procédé de formation Download PDF

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Publication number
WO2024256867A1
WO2024256867A1 PCT/IB2024/000297 IB2024000297W WO2024256867A1 WO 2024256867 A1 WO2024256867 A1 WO 2024256867A1 IB 2024000297 W IB2024000297 W IB 2024000297W WO 2024256867 A1 WO2024256867 A1 WO 2024256867A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
security document
photochromic ink
area
image
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.)
Ceased
Application number
PCT/IB2024/000297
Other languages
English (en)
Inventor
Khiengkrai Khusuwan
Niwat Somkhantee
Vincent Gourmelen
Patcharapol SUPATHAM
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.)
Linxens Holding SAS
Original Assignee
Linxens Holding SAS
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 Linxens Holding SAS filed Critical Linxens Holding SAS
Priority to CN202480038832.4A priority Critical patent/CN121511168A/zh
Publication of WO2024256867A1 publication Critical patent/WO2024256867A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B42D25/20—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
    • B42D13/00—Loose leaves modified for binding; Inserts
    • 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
    • B42D25/24—Passports
    • 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
    • B42D25/309—Photographs
    • 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
    • B42D25/30—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
    • B42D25/382—Special inks absorbing or reflecting infrared light
    • 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
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light
    • 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
    • B42D25/405—Marking
    • B42D25/41—Marking using electromagnetic radiation
    • 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
    • B42D25/455—Associating two or more layers using heat
    • 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
    • B42D25/46—Associating two or more layers using pressure

Definitions

  • the present invention relates to structures and laminated structures for security documents and to the corresponding security documents.
  • sensitive data or information has to be stored in a permanent and tamper resistant manner, in particular, when data or information in non-electronic form, possibly in combination with electronically stored data, has to be stored in certain carriers.
  • credit cards, respective cards for health insurance, passports and the like represent respective “carriers” having stored therein a significant amount of non-electronic information, for instance, in the form of one or more images, symbols, text and the like.
  • this information is provided on the basis of a respective carrier, hereinafter referred to as “security document,” which may have to provide for resistance of the stored information with respect to environmental influences, while, nevertheless, allowing frequent and long term use of a respective security document.
  • a passport may have to be typically used for a time period of several years and may, thus, depending on the habits of the passport owner, require a more or less frequent opening and closing, storing in sometimes harsh environments and the like.
  • any type of cards to be used in financial transactions and the like may have to withstand mechanical stress upon interaction with respective card readers and the like, while also providing for high robustness and reliability during a daily use of any such security documents.
  • the information included in a corresponding security document has to provide for high tamper resistance so as to make difficult any intentional manipulation of the information stored in the respective datapage of the security document, while, preferably, upon attempting to manipulate the datapage, any such attempt should become recognizable in a visible or any other appropriate manner.
  • a structure for a security document which comprises: a first layer comprising a user identification area for forming an image of a user, and a second layer including a photochromic ink area comprising photochromic ink, wherein the photochromic ink area is aligned in correspondence with the user identification area.
  • This structure is advantageous because it is provided with an additional security feature.
  • any attempt of counterfeiting or tampering the structure according to the present invention would result in a damage of the second layer including the photochromic ink and would hence hinder the response of the structure to light illumination and light activation.
  • a laminated structure for a security document which comprises: a first layer comprising a user identification area for forming an image of a user, and a second layer including a photochromic ink area comprising photochromic ink wherein the photochromic ink area is aligned in correspondence with the user identification area, and wherein the first and second layer are laminated together.
  • This configuration is advantageous because it provides the laminated structure with an additional security feature.
  • any attempt of counterfeiting or tampering the laminated structure according to the present invention would result in a damage of the second layer including the photochromic ink and would hence hinder the response of the laminated structure to light illumination and light activation.
  • a laminated structure for a security document refers to a stacked structure of individual plastic sheets, such as polycarbonate layers or sheets, which are stacked and cut into desired dimensions, thereby providing the possibility of inserting respective sensitive data carriers, such as an image and the like, and/or using one of the layers itself as a carrier of sensitive information.
  • the individual plastic sheets of the stacked structure After having introduced at least a part of the sensitive data into the stacked structure, the individual plastic sheets of the stacked structure are heat treated so as to be laminated together and form the laminated structure. After lamination of additional security layers to the laminated structure, the security document is formed.
  • the security document is a more or less continuous piece of material or monoblock, which cannot be separated in a later stage without inducing significant damage and, thus, leaving behind recognizable traces of any sort of tampering attempt.
  • the expression “the photochromic ink area is aligned in correspondence with the user identification area” refers to an alignment of the two areas along the stacking direction.
  • this expression indicates that a projection of at least a plurality of the points of a cross-section of the photochromic ink area (i.e. some or all the points of the cross-section of the photochromic ink area) is comprised, or falls within, a cross-section of the user identification area. Accordingly, several configurations may be possible, wherein the photochromic ink area and the user identification area are considered aligned according to the definition of the present disclosure.
  • a symmetric configuration may be possible, wherein a cross-section of the photochromic ink area is equal to a cross-section of the user identification area, so that all the points of the cross-section of the photochromic ink area can be projected onto the cross-section of the user identification area.
  • an asymmetric configuration may be possible, wherein the cross-section of the photochromic ink area differs from the cross-section of the user identification area, e.g. the cross-section of the photochromic ink area is larger or smaller than the cross-section of the user identification area, so that part of the points of the cross-section of the photochromic ink area can be projected onto the cross-section of the user identification area.
  • the photochromic ink area is placed in correspondence with the user identification area so that they are formed in corresponding portions of the first and second layers, once the two layers are assembled to form the laminated structure.
  • the image of a user may be formed in the user identification area by means of any suitable technique, such as laser engraving or particle deposition.
  • the image of the user may be formed in black and white.
  • the user identification area and the photochromic ink area may have the same dimensions and they may be placed in correspondence to each other so as to be aligned, i.e. so that the edges of the user identification areas are aligned with the edges of the photochromic ink area.
  • the user identification area and the photochromic ink area may have different dimensions and the photochromic ink area may be larger than the user identification area.
  • the photochromic ink area is placed in correspondence with the user identification area so that the projection of the user identification area on the second layer is included in the photochromic ink area.
  • the dimensions of the user identification area and the photochromic ink area may be different to each other and the user identification area may be larger than the photochromic ink area.
  • the photochromic ink area is placed in correspondence with the user identification area so that the projection of the user identification area on the second layer includes the photochromic ink area.
  • the laminated structure may comprise additional layers directly laminated to the first layer and/or to the second layer, such as one or more overlay layers, and/or one or more intermediate layers placed between the first and the second layers.
  • the photochromic ink may be an ultraviolet (LIV) photochromic ink that responds to UV illumination.
  • LIV ultraviolet
  • a security document which comprises a laminated structure as the ones described above and an image of a user formed in the user identification area.
  • the security document is provided with an additional security feature.
  • the security document comprising the second layer with the photochromic ink is illuminated with a light source, then the photochromic ink is activated and a response, such as a change in color, is induced in the photochromic ink.
  • the image formed in the user identification area, which is aligned with the photochromic ink area can appear to change color after exposure to the light.
  • This additional security feature can appear only when the security document is exposed to a suitable light source. For instance, if the photochromic ink is a UV photochromic ink, this additional security feature may appear only after UV irradiation. For instance, if the photochromic ink is an infrared (IR) photochromic ink, this additional security feature may appear only after UV irradiation.
  • IR infrared
  • a method for operating a security document comprising a photochromic ink feature comprising the following steps:
  • Illuminating the security document with a light source for instance a UV source
  • the advantage of this method is that it enables checking that the security document has not been tampered nor counterfeited. In fact, any attempt to counterfeit or tamper the security document would result in a damage of the photochromic ink and in a hindrance of the response to light illumination. If, after exposure to a suitable light source, for instance a UV source, no change in the color of the image of the security document is observed, this may be an indication that the security document has been counterfeited. On the other hand, if, after exposure to a suitable light source, the image of the security document undergoes a temporary color change, for instance a temporary color change in the background of the image, this may be an indication that the security document is original and reliable.
  • a suitable light source for instance a UV source
  • Figure 2 schematically illustrates an exploded view of a security document according to another embodiment of the present invention
  • Figure 3 schematically illustrates a cross sectional view of a security document according to an embodiment of a present invention
  • Figure 4 schematically illustrates a cross sectional view of a security document according to another embodiment of the present invention.
  • Figure 5 schematically illustrates a cross sectional view of a security document according to another embodiment of the present invention.
  • Figure 6A schematically illustrates a security document according to the present invention, during a first step of use
  • Figure 6B schematically illustrates a security document according to the present invention, during a further step of use
  • Figure 6C schematically illustrates a security document according to the present invention, during a further step of use
  • Figure 6D schematically illustrates a security document according to the present invention during a further step of use.
  • Fig. 1 schematically illustrates an exploded view of a security document 200 according to an embodiment of the present invention.
  • the security document 200 comprises a laminated structure 100 and additional layers 202 and 204, which are laminated to the laminated structure 100.
  • the additional layers 202 and 204 may be white or transparent and they may include printed security features, such as images.
  • the laminated structure 100 comprises a first layer 112 comprising a user identification area 114 for forming an image 120 of a user, and a second layer 116 including a photochromic ink area 118 comprising photochromic ink, that is ink responding to light stimulation.
  • the laminated structure 100 further comprises an intermediate layer 132 placed between the first layer 112 and the second layer 116.
  • the first layer 112 and the second layer 116 are placed so that the user identification area 114 is placed in correspondence with the photochromic ink area 118.
  • the photochromic ink area 118 is larger than the user identification area 114 and the fact that the user identification area 114 is placed in correspondence with the photochromic ink area 118 indicates that they are positioned so that a projection of the user identification area 114 on the second layer 116 falls within the area of the photochromic ink area 118.
  • the image 120 of the user is generated in the user identification area 114, for instance is generated by means of laser illumination. It is to be understood that the laminated structure 100 does not comprise the image 120 of the user, which is generated at a later stage of the manufacturing of the security document 200, for instance by the competent authorities.
  • the security document 200 further comprises an overlay layer 210 for protecting the image 120 of the user.
  • the overlay layer 210 is laminated to the laminated structure 100.
  • Fig. 2 schematically illustrates an exploded view of a security document 200, according to another embodiment of the present invention.
  • the security document 200 comprises the laminated structure 100, the overlay layer 210, and the additional layers 202 and 204.
  • the laminated structure 100 that is schematically shown in Fig. 2 comprises a first layer 112 and a second layer 116 having the same features of the first and second layers 112 and 116 described with reference to Fig. 1 .
  • the first layer 112 and the second layer 116 are directly attached to each other so that the photochromic ink area 118 is directly in contact with the user identification area 114.
  • Fig. 3 schematically illustrates a cross sectional view of a security document 200 according to an embodiment of the present invention.
  • the security document 200 comprises the laminated structure 100 and the additional layers 202 and 204.
  • the first layer 112 and the second layer 116 are indirectly attached to each other via the intermediate layers 132 and 134.
  • two intermediate layers 132 and 134 are placed between the first layer 1 12 and the second layer 116.
  • any number of intermediate layers may be placed between the first layer 112 and the second layer 116, for instance one, three, four or more.
  • the intermediate layers 132 and 134 may be advantageously added to the laminated structure 100 to facilitate the process of image formation on the first layer 112. For instance, they may simplify the process of image formation by means of laser irradiation.
  • the one or more intermediate layers 132 and 134 are transparent, so as to not hinder the effect of the photochromic ink on the image 120 placed on the user identification area 114.
  • the first layer 112 and the second layer 116 are advantageously positioned so that the user identification are 114 is in correspondence with the photochromic ink area 118.
  • the photochromic ink area 118 is larger than the user identification area 114: the user identification area 114 is placed in correspondence with the photochromic ink area 118, so that the projection of the user identification area 114 on the second layer 116 is included within the photochromic ink area 118.
  • the photochromic ink of the photochromic ink area 118 is activated by means of light irradiation (as will be described in detail below), the color change of the photochromic ink can be visible on the whole image 120 placed in the user identification area 114.
  • the photochromic ink is placed on the side of the second layer 116 facing towards the intermediate layer 134.
  • Fig. 4 schematically illustrates a cross sectional view of the security document 200 of Fig. 1 .
  • the security document 200 comprises the laminated structure 100 and the additional layers 202 and 204.
  • the size of the photochromic ink area 118 is larger than the size of the user identification area 114.
  • a single intermediate layer 132 is placed between the first layer 112 and the second layer 116.
  • the photochromic ink is placed on the side of the second layer 116 in contact with intermediate layer 132.
  • Fig. 5 schematically illustrates a cross sectional view of the security document 200 of Fig. 2.
  • the security document 200 of Fig. 5 comprises the laminated structure 100 and the additional layers 202 and 204.
  • the size of the photochromic ink area 118 is larger than the size of the user identification area 114.
  • the first layer 112 and the second layer 116 are directly attached to each other so that the photochromic ink is in contact with the first layer 112.
  • Fig. 6A schematically illustrates the security document 200, comprising the user’s image 120, during a first step of use, when the security document 200 is not illuminated by any light source suitable for activating the photochromic ink.
  • the photochromic ink is not activated and the image 120 has one or more predefined colors.
  • the profile of the user 122 may have a first predefined coIor and the background of the image 124 may have a second predefined color.
  • the second predefined color is white.
  • Fig. 6B schematically illustrates the security document 200 during a further step of use, when the security document 200 is illuminated with a light source suitable for activating the photochromic ink.
  • a light source suitable for activating the photochromic ink For instance, if the photochromic ink is a LIV photochromic ink, the suitable light source may be a LIV source.
  • the photochromic ink is an IR photochromic ink, the suitable light source may be an IR source.
  • the security document 200 may be exposed to the light source for a time interval necessary for activating the photochromic ink, for instance a time interval comprised within 1 to 10 seconds, preferably a time interval comprised within 1 to 2 seconds.
  • the color change induced by the photochromic ink on the image 120 is temporary and it lasts for a predefined time interval after the light illumination, for instance the predefined time interval may be comprised between 1 min and 10 sec, preferably between 30 sec and 15 sec, depending on the illumination condition of the environment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Printing Methods (AREA)

Abstract

La présente invention concerne une structure pour un document de sécurité, qui comprend une première couche comprenant une zone d'identification d'utilisateur pour former une image d'un utilisateur, et une seconde couche comprenant une zone d'encre photochromique comprenant de l'encre photochromique, la zone d'encre photochromique étant placée en correspondance de la zone d'identification d'utilisateur. La présente invention concerne en outre un document de sécurité comprenant la structure stratifiée obtenue à partir de la structure décrite.
PCT/IB2024/000297 2023-06-12 2024-06-11 Structure pour document de sécurité à caractéristiques photochromiques et son procédé de formation Ceased WO2024256867A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202480038832.4A CN121511168A (zh) 2023-06-12 2024-06-11 用于具有光致变色特征的安全文件的结构及其形成方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23305932.8 2023-06-12
EP23305932.8A EP4477426A1 (fr) 2023-06-12 2023-06-12 Structure pour un document de sécurité à éléments photochromiques et son procédé de formation

Publications (1)

Publication Number Publication Date
WO2024256867A1 true WO2024256867A1 (fr) 2024-12-19

Family

ID=87429646

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2024/000297 Ceased WO2024256867A1 (fr) 2023-06-12 2024-06-11 Structure pour document de sécurité à caractéristiques photochromiques et son procédé de formation

Country Status (3)

Country Link
EP (1) EP4477426A1 (fr)
CN (1) CN121511168A (fr)
WO (1) WO2024256867A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009056352A1 (fr) * 2007-10-31 2009-05-07 Bundesdruckerei Gmbh Composite polymère stratifié pour document de sécurité et/ou de valeur et son procédé de fabrication
EP2308930A1 (fr) * 2005-07-01 2011-04-13 3DTL, Inc. Systèmes et procédés pour créer des effets optiques sur des supports pour prévenir la contrefaçon
WO2014029686A1 (fr) * 2012-08-23 2014-02-27 Bayer Materialscience Ag Document de sécurité et/ou de valeur comportant une fenêtre visuellement commutable pourvue d'un hologramme
EP4000940A1 (fr) * 2020-11-20 2022-05-25 IDEMIA France Document de sécurité dans lequel une fenêtre comprend une partie ovm et une partie en matériau photochromique ou thermochromique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2308930A1 (fr) * 2005-07-01 2011-04-13 3DTL, Inc. Systèmes et procédés pour créer des effets optiques sur des supports pour prévenir la contrefaçon
WO2009056352A1 (fr) * 2007-10-31 2009-05-07 Bundesdruckerei Gmbh Composite polymère stratifié pour document de sécurité et/ou de valeur et son procédé de fabrication
WO2014029686A1 (fr) * 2012-08-23 2014-02-27 Bayer Materialscience Ag Document de sécurité et/ou de valeur comportant une fenêtre visuellement commutable pourvue d'un hologramme
EP4000940A1 (fr) * 2020-11-20 2022-05-25 IDEMIA France Document de sécurité dans lequel une fenêtre comprend une partie ovm et une partie en matériau photochromique ou thermochromique

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Publication number Publication date
CN121511168A (zh) 2026-02-10
EP4477426A1 (fr) 2024-12-18

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