EP1436149B1 - Prägefolie und sicherheitsdokument - Google Patents

Prägefolie und sicherheitsdokument Download PDF

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Publication number
EP1436149B1
EP1436149B1 EP02776823A EP02776823A EP1436149B1 EP 1436149 B1 EP1436149 B1 EP 1436149B1 EP 02776823 A EP02776823 A EP 02776823A EP 02776823 A EP02776823 A EP 02776823A EP 1436149 B1 EP1436149 B1 EP 1436149B1
Authority
EP
European Patent Office
Prior art keywords
layer
security document
pigments
colour
embossing film
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.)
Revoked
Application number
EP02776823A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1436149A1 (de
Inventor
Günther FRIEDL
Uwe Nendel
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.)
Leonhard Kurz Stiftung and Co KG
Original Assignee
Leonhard Kurz Stiftung and Co KG
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
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Application filed by Leonhard Kurz Stiftung and Co KG filed Critical Leonhard Kurz Stiftung and Co KG
Publication of EP1436149A1 publication Critical patent/EP1436149A1/de
Application granted granted Critical
Publication of EP1436149B1 publication Critical patent/EP1436149B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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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
    • B42D25/405—Marking
    • B42D25/425—Marking by deformation, e.g. embossing
    • 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
    • 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
    • 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
    • B42D25/465—Associating two or more layers using chemicals or adhesives
    • B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives
    • B42D2033/10—
    • B42D2033/18—
    • 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
    • Y10T428/2486—Intermediate layer is discontinuous or differential with outer strippable or release layer
    • 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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/254—Polymeric or resinous material
    • 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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof

Definitions

  • the invention relates to a stamping foil, in particular a hot stamping foil, comprising a transfer layer arranged releasably on a carrier film and a security document, in particular banknote, identity card, identity card, check card, credit card.
  • stamping foils in particular hot stamping foils, are known in the prior art.
  • the transfer layer is transferred from the carrier film to a substrate under the action of heat and pressure, to which the transfer layer using an adhesive layer, which is generally a layer of hot-melt adhesive or a layer of radiation-curable adhesive, liable.
  • hot stamping foils are widely used.
  • a fuse element which consists of a provided with magnetic coating film, wherein the coating has bright, soft magnetic pigments.
  • a security document produced using the security element known.
  • the improved safety properties should in particular result from the use of soft magnetic pigments, which, in contrast to customary magnetic pigments, are particular have magnetic properties and thus complicate a forgery of the security element.
  • these soft magnetic pigments have a light coloration, which are suitable for producing a magnetic layer with a light intrinsic color. This bright magnetic layer differs from a conventional magnetic layer with dark or black inherent color. Additional application of a white color layer over and / or under the magnetic layer can enhance the bright appearance.
  • the disadvantage is that by applying a white cover layer on a conventional magnetic layer with dark or black inherent color according to the DE 41 01 301 A1 proposed security element can be forged in a simple manner.
  • An identification of the fake of the DE 41 01 301 A1 known security element is possibly only after an investigation of the magnetic properties possible.
  • this requires an additional verification step, which is often not feasible on the spot.
  • a check card in conjunction with a check issued issued only a visual check of the card and a comparison of the signature on the check card with the signature on the check.
  • a bright or white cover layer is applied to the dark or black magnetic layer of a counterfeit bank card, it is not readily recognizable as a forgery.
  • luminescent pigments in the transfer layer provides a significantly improved Fuse element or better secured backup documents allows verification of the authenticity of the fuse element is only possible under the irradiation of light with the defined excitation wavelength.
  • a light source for generating light with the defined excitation wavelength Since such a light source is often not available, the authenticity of such a fuse element can not always be checked.
  • the DE 199 07 697 A1 discloses a multilayer transfer material comprising an optically variable material and additionally at least one machine readable feature fabric.
  • the optically variable material or pearlescent liquid-crystalline materials are preferably (Iriodin ®) is used.
  • the disadvantage is that the proposed optically variable materials have an unsatisfactory color change as a function of a viewing angle and therefore do not meet the increased safety requirements for objects or documents to be secured.
  • Another object of the invention is to provide a security document provided with a counterfeiting complicating coating.
  • Another object of the invention is to combine increased anti-counterfeiting security with improved decorative properties.
  • an embossing film in particular a hot embossing film, comprising a support film detachably arranged transfer layer, wherein the transfer layer has at least one color layer whose color appearance changes as a function of a viewing angle and wherein the color layer contains colored interference pigments with metal core solved.
  • the object underlying the invention is further by a security document, in particular banknote, ID card, ID card, check card, credit card, wherein on the security document, a layer structure, which has at least one color layer whose color appearance changes depending on a viewing angle, is arranged, and wherein the color layer contains colored interference pigments with metal core dissolved.
  • the term "viewing angle” is understood to mean the angle at which the color layer in the transfer layer of the embossing foils or the color layer on the security document is viewed by a viewer.
  • the viewing angle is understood to be the angle enclosed between the normal of the film surface or the surface of the security document and the viewing direction of a viewer.
  • the viewer looks perpendicular to the surface of the stamping foil or security document.
  • the viewer looks at a very shallow angle on the surface of the stamping foil or the security document.
  • Such a security document such as a badge or credit card
  • a security document can be obtained by simply tipping the credit card, i. by changing the viewing angle. If no or no predetermined change in the color appearance occurs, the viewer knows immediately that the security document is forged.
  • a securing element is provided, which allows a constant review with the naked eye, that is, without the use of additional technical facilities.
  • the present invention also makes it possible to provide a transfer layer that is aesthetically pleasing or decorative.
  • a color layer corresponding to corporate colors may be applied and, when viewed at different viewing angles, produce a predetermined change in the color appearance.
  • the color layer contains colored interference pigments with metal core, wherein a function of the viewing angle in the color layer Hue shift or change occurs.
  • the interference pigments with metal core are characterized by a strong intrinsic coloration. Thus, color changes or shifts of red / gold, blue red, etc. can be achieved.
  • the colored interference pigments to be used according to the invention have an excellent covering ability.
  • a dark background such as e.g. a black magnetic layer, be covered reliably and decorative.
  • the light reflection on the surfaces of the metal cores causes a metallic effect, which is superimposed on a light scattering at the edges of the platelets.
  • the optical properties of the metal-core colored interference pigments depend on particle shape, particle size and particle size distribution. The larger a pigment particle, i. the lower the fines content and the more uniform the shape, the higher the brilliance and the brightness of the color layer. The lower the fines content of the pigment particles, the more saturated is the hue or chromaticity in the ink layer.
  • the brightness depends on the angles that the light source, the surface of the color layer, and the viewer occupy with each other. If the viewing angle is approximately the angle of incidence of the light, ie the glancing angle, then the color layer appears significantly brighter than at viewing angles that deviate substantially from this angle of incidence or gloss angle. This change in the appearance of the color layer with respect to the brightness of the color layer is determined by the ratio of directly reflected light to diffusely scattered light. This effect is more pronounced with coarser pigments than with finer pigments.
  • the light is not only multiply reflected by the preferably multi-layer structure in the case of colored interference pigments with metal core, but the reflected light beams can also interfere with one another with a corresponding layer thickness and thus lead to a change in the appearance of the color layer as a function of the viewing angle.
  • color layer in addition to colored interference pigments with metal core, also other pigments, preferably colored pigments, are included.
  • other pigments preferably colored pigments.
  • any desired color tone can be achieved and possibly a more visible color flop can be achieved, e.g. by admixtures of soot.
  • the colored layer contains colored interference pigments with a metal core and transparent colored pigments
  • a color impression produced by the viewer of the colored layer results from a combination of the directed light reflection at the surface of the colored layer and at the metal cores of the colored interference pigments, the light scattering at the metal cores and the light absorption at the colored pigments.
  • the color impression produced by the viewer, i. the appearance of the color layer is dependent on the viewing angle under which the viewer looks at the color layer.
  • the appearance of the color layer caused to the viewer is essentially determined by the directed reflection of the light from the metal core, since in this case the viewer's eye is in the light path of the reflected light.
  • the eye If the eye is located outside the beam path of the reflected light, ie if the viewing angle is clearly different from the glancing angle, the light reflected by the metal core strikes the eye only to a lesser extent The viewer's perception of the appearance is largely determined by the diffusely scattered and absorbed light.
  • the color layer appears to the viewer as shiny and bright.
  • the color layer appears to the viewer as being dark and similar to the full color of the colored pigment.
  • a change in the hue of the solid can also be effected in the color layer. This is due to the longer incidence angle of the light in the color layer, whereby more light is absorbed, due.
  • the metallic effect pigments are selected from the group consisting of aluminum, copper, zinc, gold bronze, titanium, zirconium, tin and iron pigments, alloys of the aforementioned pigments and mixtures thereof.
  • the pigment Chromaflair® Flex Products, Inc. Santa Rosa, Calif./USA, has been found to be very suitable, which has an intense color.
  • the colored interference pigments with metal core can thereby comprise one or more layers of colored metal oxides selected from the group consisting of TiO 2 , Al 2 O 3 , Fe 2 O 3 , Cr 2 O 3 , SnO 2 , ZrO 2 , CoFe 2 O 3 or Co 3 O 4 and mixtures thereof, are selected.
  • the color of the pigments can be adjusted via the layer thickness of the applied metal oxide layer or an applied metal-containing layer.
  • an interference layer with a suitable refractive index preferably a vitreous layer
  • a suitable refractive index preferably a vitreous layer
  • a glassy layer can For example, an SiO 2 layer may be applied. But it is also possible to apply non-stoichiometric SiO x layers, if these layers cause interference.
  • Multi-coated aluminum pigments have proved to be very suitable, an interference layer of preferably SiO 2 and subsequently a colored metal oxide layer, preferably a layer of Fe 2 O 3 , being applied to an aluminum core.
  • the interference pigments with metal core have a very good covering ability.
  • these pigments can cover the usually black or dark intrinsic color of a magnetic layer or of a magnetic strip if the ink layer is arranged over a magnetic layer or a magnetic strip.
  • the inorganic colored pigments there may be used conventional inorganic colored pigments such as iron oxide pigments, chromium oxide green pigments, chromatalt yellow pigments, iron blue pigments, molybdate red pigments, ultramarine pigment or mixed color pigments. Furthermore, mixed oxide oxide pigments such as nickel titanium yellow, chrome titanium yellow, cobalt green, cobalt blue, zinc iron brown, chrome iron brown, iron manganese black, spinel black or carbon black can also be used.
  • inorganic colored pigments such as iron oxide pigments, chromium oxide green pigments, chromatalt yellow pigments, iron blue pigments, molybdate red pigments, ultramarine pigment or mixed color pigments.
  • mixed oxide oxide pigments such as nickel titanium yellow, chrome titanium yellow, cobalt green, cobalt blue, zinc iron brown, chrome iron brown, iron manganese black, spinel black or carbon black can also be used.
  • organic colored pigments conventional organic pigments can be used.
  • monoazo pigments such as acetoacetarylide, benzimidazolone, naphthol AS, laked ⁇ -naphthol dyes, diazo pigments such as azo condensation pigments or dipyrazolone; polycyclic pigments such as quinacridone, dioxazine, perylene, diketo-pyrrolo-pyorol, isoindoline, anthraquinone derivatives; or metal complex pigments such as copper phthalocyanines.
  • the pigments are embedded in a lacquer in the color layer.
  • the lacquer used here can be any lacquer compatible with the respective pigments and commonly used.
  • lacquers based on polyesters, unsaturated polyesters, acrylates can be used.
  • a protective layer preferably a protective lacquer layer
  • the protective layer covers the ink layer.
  • the protective layer protects the ink layer against mechanical and chemical influences.
  • the protective layer or the protective lacquer layer does not have to be colorless, but may also be colored.
  • the protective lacquer layer is transparent or substantially transparent.
  • a release layer is arranged between the carrier film and the transfer layer.
  • the release layer can be, for example, a wax layer which melts when heat is applied to the stamping foil, resulting in a separation of the carrier film on the one hand and the transfer layer on the other hand.
  • the separation layer is arranged between carrier film and protective layer.
  • the transfer layer has an adhesive layer on the surface facing away from the carrier film.
  • a hot stamping foil is applied to a substrate, for example a security document, the hot stamping foil is applied with its adhesive layer against the substrate to be coated and then subjected to heat and pressure from the carrier film side.
  • the adhesive layer may alternatively be provided on the substrate.
  • the arrangement of an adhesive layer on the transfer layer comprising, for example, a protective layer and a coloring layer is not required.
  • the transfer layer comprises a magnetizable layer.
  • the magnetizable layer may have a composition such as is commonly used for example in check or credit cards. On the magnetizable layer information can be stored and / or read in the usual way.
  • the transfer layer is formed in the form of a strip.
  • the transfer layer comprising a protective layer and color layer may be formed as a marking layer or a marking strip.
  • the signature of the authorized person must be given on this marking strip.
  • the transfer layer additionally comprises a magnetizable coating.
  • the magnetizable coating is preferably applied to the surface of the ink layer facing away from the viewer of the ink layer.
  • the color layer and the optionally present magnetizable layer with respect to the protective layer limited in scope. That is, when applying a transfer layer to a substrate, such as a plastic card formed in the form of a check card, the protective layer can cover the entire surface of the plastic card and the color layer and the optionally present magnetizable layer can be in the form of a strip, preferably spaced parallel one longitudinal side of the plastic card extends, be limited.
  • the embossing film has a structure in the following order: carrier film, release layer, protective layer, ink layer and optionally an adhesive layer, wherein the transfer layer comprises the protective layer and color layer.
  • the embossing foil has a structure in the following order: carrier film, release layer, protective layer, color layer, magnetic layer and optionally an adhesive layer, the transfer layer comprising the protective layer, magnetic layer and color layer.
  • an adhesive layer, a color layer and a protective layer is provided on the security document.
  • an adhesive layer, a magnetizable layer, a color layer and a protective layer are provided on the security document, starting from the security document.
  • film thicknesses or layer thicknesses are not limited to the example given, but can generally be used.
  • the release layer 2, protective layer 3, ink layer 4, magnetizable layer 5 and adhesive layer 6 are applied to the carrier film 1 by conventional methods, for example by printing methods, and are known to the person skilled in the art of production of stamping foils.
  • the hot stamping foil produced using the above compositions may be used to produce a secure security document 8, such as a banknote, a badge, an identity card, a Bank card to be used on a credit card.
  • a secure security document 8 such as a banknote, a badge, an identity card, a Bank card to be used on a credit card.
  • the hot stamping film is applied with the adhesive layer 6 against the security document to be secured 8 and acted upon by the carrier film side 1 with heat and pressure.
  • the release layer 2 melts and the adhesive layer 6 is activated, as a result of which the transfer layer 7 consisting of magnetizable layer 5, ink layer 4 and protective layer 3 adheres to the security document 8.
  • the thus provided security document 8 then comprises a layer structure in the following order: security document 8, adhesive layer 6, magnetic layer 5, ink layer 4 and protective layer 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Finance (AREA)
  • Accounting & Taxation (AREA)
  • Business, Economics & Management (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Credit Cards Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Decoration By Transfer Pictures (AREA)
  • Glass Compositions (AREA)
  • Burglar Alarm Systems (AREA)
  • Graft Or Block Polymers (AREA)
EP02776823A 2001-10-19 2002-10-16 Prägefolie und sicherheitsdokument Revoked EP1436149B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10151150 2001-10-19
DE10151150 2001-10-19
PCT/DE2002/003909 WO2003035409A1 (de) 2001-10-19 2002-10-16 Prägefolie und sicherheitsdokument

Publications (2)

Publication Number Publication Date
EP1436149A1 EP1436149A1 (de) 2004-07-14
EP1436149B1 true EP1436149B1 (de) 2008-07-09

Family

ID=7702736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02776823A Revoked EP1436149B1 (de) 2001-10-19 2002-10-16 Prägefolie und sicherheitsdokument

Country Status (11)

Country Link
US (1) US20040241400A1 (enrdf_load_stackoverflow)
EP (1) EP1436149B1 (enrdf_load_stackoverflow)
JP (1) JP2005506228A (enrdf_load_stackoverflow)
KR (1) KR20040041696A (enrdf_load_stackoverflow)
CN (1) CN1273311C (enrdf_load_stackoverflow)
AT (1) ATE400448T1 (enrdf_load_stackoverflow)
AU (1) AU2002339367B2 (enrdf_load_stackoverflow)
DE (2) DE10294832D2 (enrdf_load_stackoverflow)
ES (1) ES2307796T3 (enrdf_load_stackoverflow)
RU (1) RU2294841C2 (enrdf_load_stackoverflow)
WO (1) WO2003035409A1 (enrdf_load_stackoverflow)

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JPWO2007049513A1 (ja) * 2005-10-25 2009-04-30 紀和化学工業株式会社 情報表示体用覗き見防止フィルム及びその製造方法
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US20120133121A1 (en) * 2009-07-28 2012-05-31 Sicpa Holding Sa Transfer foil comprising optically variable magnetic pigment, method of making, use of transfer foil, and article or document comprising such
JP5699313B2 (ja) * 2010-08-09 2015-04-08 大日本印刷株式会社 発光媒体
TW201502257A (zh) * 2013-07-10 2015-01-16 Sicpa Holding Sa 包括可印碼與手性液晶聚合物層的標記
FR3011508B1 (fr) * 2013-10-08 2021-05-28 Banque De France Document de securite comprenant un film a effets interferentiels, procede de determination de l'authenticite d'un tel document et dispositif pour la mise en œuvre d'un tel procede.
CN108602339B (zh) * 2016-01-27 2020-06-26 凸版印刷株式会社 层叠体、层叠体的制造方法以及个人认证介质
CN109562629B (zh) * 2016-08-04 2021-02-02 默克专利股份有限公司 用于产生光学可变印刷图案的方法
CN115527303A (zh) * 2022-08-19 2022-12-27 北京柯斯元科技有限公司 一种多层磁片防伪结构

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CN1571735A (zh) 2005-01-26
RU2294841C2 (ru) 2007-03-10
WO2003035409A1 (de) 2003-05-01
EP1436149A1 (de) 2004-07-14
JP2005506228A (ja) 2005-03-03
CN1273311C (zh) 2006-09-06
DE10294832D2 (de) 2004-11-11
US20040241400A1 (en) 2004-12-02
DE50212483D1 (de) 2008-08-21
AU2002339367B2 (en) 2007-03-01
RU2004115105A (ru) 2005-03-27
ATE400448T1 (de) 2008-07-15
KR20040041696A (ko) 2004-05-17
ES2307796T3 (es) 2008-12-01

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