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WO2009033601A1 - Élément de sécurité optiquement variable - Google Patents

Élément de sécurité optiquement variable Download PDF

Info

Publication number
WO2009033601A1
WO2009033601A1 PCT/EP2008/007230 EP2008007230W WO2009033601A1 WO 2009033601 A1 WO2009033601 A1 WO 2009033601A1 EP 2008007230 W EP2008007230 W EP 2008007230W WO 2009033601 A1 WO2009033601 A1 WO 2009033601A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
security element
effect pigments
pigments
element according
Prior art date
Application number
PCT/EP2008/007230
Other languages
German (de)
English (en)
Inventor
Christoph Mengel
Jörg Langer
Max Voit
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40040008&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2009033601(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Giesecke & Devrient Gmbh filed Critical Giesecke & Devrient Gmbh
Priority to PL08785823T priority Critical patent/PL2200840T3/pl
Priority to EP08785823A priority patent/EP2200840B1/fr
Publication of WO2009033601A1 publication Critical patent/WO2009033601A1/fr

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
    • 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
    • B42D25/351—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
    • 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
    • B42D25/364—Liquid crystals
    • 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
    • B42D25/369—Magnetised or magnetisable 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
    • B42D25/405—Marking
    • B42D25/425—Marking by deformation, e.g. embossing
    • B42D2033/16—
    • B42D2033/20—
    • B42D2035/24—

Definitions

  • the invention relates to an optically variable security element for securing valuables.
  • the invention further relates to a method and an apparatus for producing such a security element as well as a security paper and a data carrier with such a security element.
  • Data carriers such as valuables or identity documents, but also other valuables, such as branded goods, are often provided with security elements for the purpose of security, which permit verification of the authenticity of the data carrier and at the same time serve as protection against unauthorized reproduction.
  • the security elements can be embodied, for example, in the form of a security thread embedded in a banknote, a covering film for a banknote with a hole, an applied security strip, a self-supporting transfer element or else in the form of a feature area printed directly on a value document.
  • the security elements are equipped with optically variable elements which give the viewer a different image impression under different viewing angles and, for example, show a different color or brightness impression and / or another graphic motif depending on the viewing angle.
  • BEST ⁇ TIGUNGSKOP1E For example, it changes from green to blue, from blue to magenta, or from magenta to green.
  • the occurrence of such color changes when tilting a security element is referred to below as a color shift effect.
  • optically variable thin-film elements are known in whose layer structure at least one magnetic layer is integrated. The magnetic properties of these optically variable thin-film elements can then be used as an additional authenticity mark.
  • the document EP 1 780 040 A2 describes a security element in which magnetically oriented pigment particles are present in a partial region which produce a kinematic visual effect.
  • the magnetically oriented pigment particles may in particular also have optically variable properties.
  • the object of the invention is to further improve a security element of the aforementioned type and, in particular, to provide a security element with an attractive visual appearance and high security against counterfeiting, which moreover allows an intelligent combination with further, in particular underlying, security features.
  • a generic security element has an at least partially translucent, optically variable color layer which shows a motif in the form of patterns, characters or a coding, and in which the color layer of the security element contains first, optically variable effect pigments and second, magnetically alignable effect pigments , which are magnetically aligned in the shape of the motif to be displayed.
  • Such a security element offers a combination of attractive visual effects, namely, on the one hand, the optically variable effect of the first effect pigments and, on the other hand, the motif produced by the magnetic alignment of the second effect pigments, which has a pronounced three-dimensional appearance. Due to their at least partially present translucency, the optically variable ink layer can also be combined with other underlying security features, such as an information-carrying print layer or a see-through area.
  • translucent means translucent in the sense of a certain or complete translucency and thus also includes transparency.
  • a translucent layer makes it possible to perceive the objects behind or below it, even if the brightness of the objects can be reduced by the translucent layer and / or the color of the objects can be changed.
  • the light transmission of a layer is so low that the objects behind or underneath are no longer recognizable, it is no longer translucent but is called opaque or opaque.
  • the invention is based on the idea to use a color layer with two different effect pigments with different specific properties.
  • the first effect pigments are optically variable, while the second effect pigments are magnetically alignable. Essentially only the latter, but not the first effect pigments are magnetically oriented in the orientation of an external magnetic field in the form of the motif to be displayed.
  • the optically variable ink layer contains a pigment mixture with the first and second effect pigments.
  • the optically variable color layer may also contain a pure magnetic layer with the second effect pigments and a pure color layer with the first effect pigments arranged above the pure magnetic layer.
  • the first effect pigments are advantageously pigments prepared on the basis of liquid-crystalline polymers or so-called pearlescent pigments, such as the silver white, gold luster or metallic luster pigments marketed by Merck KGaA under the name Iriodin® or Colorcrypt. Both pigments based on liquid-crystalline material and pearlescent pigments are translucent on their own.
  • the first effect pigments are formed by interference layer pigments.
  • interference layer pigments typically have a thin-film structure which expediently contains at least one reflection layer, one absorber layer and a dielectric spacer layer arranged between the reflection layer and the absorber layer.
  • Interfacial layer pigments can be translucent per se, although opaque interference layer pigments are also known.
  • the second effect pigments are preferably formed on the basis of high-purity iron powder and can be prepared, for example, from reducing-treated carbonyl iron powder.
  • Advantageous platelet-shaped iron pigments can be taken in particular from the document EP 1 251 152 Bl, whose disclosure on the preparation and properties of such pigments is included in the present description.
  • the second effect pigments are hard magnetic and thus allow in a particularly reliable manner a machine magnetic readout of the motif shown.
  • the second effect pigments are in the form of a machine-readable magnetic coding, such as a bar code, aligned.
  • the second effect pigments may in principle also be soft magnetic, although soft magnetic effect pigments are suitable for the magenta Mechanical magnetic readings are not as well suited as hard magnetic pigments.
  • the second effect pigments are preferably non-spherical, for example of a needle-shaped design. Particular preference is given to effect pigments which have a platelet form.
  • the largest diameter of a non-spherical pigment is referred to as the length or size of the pigment, while the thickness of the pigment is referred to as the pigment thickness.
  • the thickness of the pigments with the smallest diameter of the pigment will be identical.
  • the terms length, size and largest diameter of the pigment as well as thickness and smallest diameter of the pigment are used synonymously.
  • the ratio of the largest to the smallest diameter, ie the diameter-to-thickness ratio of the non-spherical second effect pigments is preferably more than 5: 1, preferably more than 10: 1.
  • This ratio is particularly preferably between 40: 1 and 400: 1.
  • the largest diameter, ie the length of the non-spherical second effect pigments is advantageously more than 2 ⁇ m, preferably more than 5 ⁇ m, more preferably more than 10 ⁇ m and very particularly preferably about 13 ⁇ m to about 15 ⁇ m.
  • magnétiqueally alignable effect pigments in the micrometer range and in particular in the stated size range on the one hand has the advantage that the particle concentration can be kept lower compared to nanoparticles. In addition, due to the more favorable diameter-to-thickness ratio without external forces, these pigments align better parallel to the layer surface.
  • Platelet-shaped effect pigments in particular in the preferred size range and in the preferred diameter-to-thickness range, can be obtained by an external magnetic field relative to the layer plane can be oriented as desired. Depending on their orientation, they then either leave the view of the underlying layers largely free (approximately perpendicular orientation relative to the layer plane) or block them partially (oblique orientation relative to the layer plane) or completely (essentially horizontal orientation relative) to the layer plane). With high diameter-to-thickness ratios, high contrasts between translucent and opaque layer areas can be set.
  • the second effect pigments are platelet-shaped and are aligned in first partial areas essentially perpendicular to the plane of the color layer in order to form translucent subregions of the color layer.
  • platelet-shaped second effect pigments may be aligned in second partial areas substantially parallel to the plane of the color layer in order to form opaque partial areas of the color layer.
  • the optically variable ink layer is preferably formed by a screen printing layer, in some embodiments also by a gravure printing layer. It may additionally be blind-embossed in all of the aforementioned embodiments, in particular for enhancing the 3D effect of the magnetically oriented effect pigments.
  • the color layer with the pigment mixture is preferably formed on the basis of a UV-curing color system, pure UV systems, UV / water-based systems or even UV / solvent-based systems being considered.
  • the color layer may also comprise further pigments, in particular isotropic pigments and / or soft magnetic pigments. hold.
  • the further pigments or, more generally, further additives may have all visually and / or machine-detectable properties which do not or only slightly impair the visual impression of the security element according to the invention.
  • the optically variable ink layer is applied to a banknote paper or on a colored background layer.
  • the substrate material for the banknote paper is any type of paper, in particular cotton vellum paper.
  • paper which contains a proportion of polymeric material in the range of 0 ⁇ x ⁇ 100% by weight is also possible.
  • the substrate material of the banknote or, more generally, of a data carrier to be a plastic film, for example a plastic film.
  • a polyester film is.
  • the film may also be monoaxially or biaxially stretched. The stretching of the film, inter alia, leads to it receiving polarizing properties that can be used as another security feature.
  • the substrate material of the banknote paper is a multilayer composite which has at least one layer of paper or a paper-like material.
  • Such a composite is characterized by an extremely high stability, which is for the durability of the paper or disk of great advantage.
  • a multilayer, paper-free composite material as the substrate material. These materials are also not preferred at present, but can be used with advantage in certain climatic regions of the earth. All materials used as substrate material may have additives which serve as authenticity features. It is primarily to think of luminescent, which are preferably transparent in the visible wavelength range and in the non-visible wavelength range by a suitable tool, for. B. a UV or IR radiation emitting radiation source can be excited to produce a visible or at least detectable with auxiliary luminescence. Other security features can also be used to advantage if they do not impair the contemplation of the security element according to the invention or at least do not significantly affect it.
  • a transparent or translucent film is also suitable as a substrate.
  • the security element may advantageously be used in or above a window area or a through opening of a value document as a see-through security element.
  • the film may be formed as a patch covering a partial surface of the substrate or as a strip extending substantially the entire length or width of the security paper or document of value.
  • the materials used for the film are primarily the plastics PET (polyethylene terephthalate), PBT (polybutylene terephthalate), PEN (polyethylene naphthalate), PP (polypropylene), PA (polyamide), PE (polyethylene).
  • the film may also be monoaxially or biaxially stretched.
  • the opening is already created in the manufacture of the security paper used for the bill and has a fibrous, irregular edge. Such an edge is characteristic of apertures already made during sheet formation and can not be generated later. Details of the production of the fibrous, irregular edge can be found in WO 03/054297 A2. In that regard, the disclosure of WO 03/054297 A2 is included in the present application.
  • the opening is produced only after papermaking by punching or cutting, for example by laser beam cutting.
  • the optically variable ink layer can be applied to an information-carrying background layer, in particular a screen-printing layer or a gravure printing layer. Since the information is recognizable in the translucent areas of the color layer, but hidden in the opaque areas, the color layer and background layer can cooperate to produce a further authenticity feature, as explained in more detail below.
  • the background layer can advantageously also have thermochromic properties in order to create an interactively influenceable security element.
  • thermochromic background layer can in particular be designed so that when it is activated by increasing the temperature, the optically variable effect of the first effect pigments for the viewer disappears.
  • the invention also includes a method for producing an optically variable security element for securing valuables, in which
  • a translucent, at least partially translucent, optically variable ink layer is applied to a substrate containing the first, optically variable effect pigments and second, magnetically alignable effect pigments, and the second effect pigments are aligned by an external magnetic field to form a motif in the form of patterns, characters or a code.
  • the first and second effect pigments are preferably mixed to form a pigment mixture and jointly printed, preferably by screen printing or intaglio printing.
  • a pure magnetic layer with the second effect pigments can first be printed onto the substrate, and then a pure color layer with the first effect pigments can be printed over the pure magnetic layer.
  • the pure magnetic layer and / or the pure ink layer is preferably printed by screen printing or intaglio printing.
  • the motive generated by the magnetic alignment is permanently fixed in an advantageous embodiment by UV curing of the ink layer or the pure magnetic layer.
  • the invention further comprises a security paper for the production of value documents or the like and a data carrier, in particular a value document, such as a banknote, a passport, a document, an identity card, credit card or the like.
  • a security paper or the data carrier are equipped according to the invention with a security element of the type described.
  • the security element can, in particular if it is present on a transparent or translucent substrate, also be arranged in or above a window area or a through opening of the security paper or the data carrier.
  • the invention further provides an apparatus for carrying out the described production method, which comprises means for applying the optically variable ink layer to a substrate and means for magnetically aligning the second effect pigments, wherein the means for magnetic alignment is preferably formed by an arrangement of permanent magnets or electromagnets are.
  • the optically variable ink layer is advantageously applied to the intended substrate by a suitable method, and the second effect pigments are then aligned, for. B. by a magnetic pressure cylinder. Subsequently, the optically variable ink layer is permanently fixed together with the motif formed by the orientation of the second effect pigments, which z. B. can be done by the above-mentioned UV curing.
  • the means for magnetic alignment can also be formed by a magnetic throat plate, so that the second effect pigments are already magnetically alignable in the intaglio printing when printing the ink layer or the pure magnetic layer.
  • FIG. 1 is a schematic representation of a banknote with a security element according to the invention
  • FIG. 2 shows the banknote of FIG. 1 in the area of the security element in FIG.
  • FIG. 3 shows an interactively influenceable security element according to another embodiment of the invention in cross-section
  • FIG. 4 shows a security element according to a further exemplary embodiment of the invention in cross section
  • FIG. 5 shows a banknote with a see-through security element according to the invention, which is arranged over a continuous opening
  • FIG. 6 shows a security element according to a further exemplary embodiment of the invention with an alternative design of the optically variable ink layer.
  • FIG. 1 shows a schematic representation of a banknote 10 which is provided with a security element 12 according to the invention shown in cross-section in FIG.
  • a printing layer 22 is applied to the banknote paper 20 in the region of the security element 12, which any information, such as a line pattern 24, an alphanumeric string, a logo or the like may represent.
  • the printing layer 22 can be applied to the banknote paper 20, for example, by screen printing or intaglio printing, with the application of the printing layer 22 particularly preferably taking place together with further printed layers, not illustrated in the figures, which form the so-called background printing of the data medium.
  • the further printing layers can be formed, for example, as guilloches or similar patterns and, like the printing layer 22, can be applied to the data carrier in flexographic printing.
  • an optically variable ink layer 26 is printed with a color shift effect in the screen printing process, in which the color impression of the layer 26 for the viewer when tilting the security element 12 z.
  • B. changes from green when viewed perpendicularly to blue when viewed obliquely. It is also conceivable a color change of z.
  • B. coppery green or from gold to green.
  • the color layer 26 contains a motif which, in the exemplary embodiment of FIG. 2, is designed for illustration in the form of a simple stripe pattern 28, 30. As explained in more detail below, this motif 28, 30 has a pronounced 3D effect for the viewer due to its formation due to the different orientation of platelet-shaped pigments 34, 36.
  • the ink layer 26 is translucent, so that in the partial regions 30 the information 24 can be seen through the ink layer 26.
  • the ink layer 26 is opaque, where the information 24 of the printing layer 22 is hidden.
  • the color layer 26 is printed using a pigment mixture of first effect pigments 32 and second effect pigments 34, 36.
  • the first effect pigments 32 is optically variable pigments, for example, on the basis of liquid-crystalline polymers produced iridescent pigments or pearlescent pigments, as are marketed, for example from Merck KGaA under the designation Iriodin ® or Colorcrypt ®.
  • interference layer pigments with a multi-layer thin-film structure of z For example, a reflection layer, an absorber layer, and a dielectric spacer layer disposed between reflection layer and absorber layer may be considered as first effect pigments 32, although these interference layer pigments are not as well suited as liquid crystal pigments or pearlescent pigments due to their lower light transmission.
  • the pigment mixture comprises, as second effect pigments, magnetically alignable, platelet-shaped iron pigments 34, 36 which in the exemplary embodiment are produced from reducing-treated carbonyl iron powder.
  • platelet-shaped iron pigments can be produced with a high ratio of platelet diameter to platelet thickness, wherein the (largest) platelet diameter is preferably between 6 .mu.m and 60 .mu.m and the platelet thickness in particular between 40 nm and 250 nm. Details of the preparation and properties of such platelet-shaped iron pigments can be found in the document EP 1 251 152 Bl, the disclosure of which is incorporated into the present description.
  • the first and second effect pigments 32, 34, 36 were mixed and jointly printed by screen printing. Then, the magnetically alignable second effect pigments were partially aligned by an external magnetic field.
  • the iron pigments 34, 36 are oriented here with the platelet expansion along the magnetic field lines, so that the iron pigments 36 are aligned substantially perpendicular to the plane of the color layer in those regions 30 in which the magnetic field lines are substantially perpendicular to the substrate plane during the alignment step be as shown in Fig. 2.
  • the orientation of the iron pigments 34 which lies substantially in the plane of the ink layer, accordingly results.
  • the platelet-shaped iron pigments 34, 36 are aligned according to the invention in the form of a desired motif, in the embodiment in the form of the stripe motif 28, 30.
  • the motifs created in this way appear with an effective, three-dimensional appearance, which in the context of this description is also referred to as a 3D effect or 3D impression of the motif.
  • any angle ⁇ between the iron pigment platelets and the layer plane can be adjusted by appropriate orientation of the magnetic field lines.
  • the non-magnetic first effect pigments 32 are not or hardly influenced by the external magnetic field during the alignment step, their orientation is therefore the same in the subregions 28 and 30.
  • the color layer 26 is dried.
  • UV-curing color systems pure UV systems, UV / water-based systems or even UV / solvent-based systems being considered.
  • the aligned effect pigments 34, 36 due to their platelike shape, act like the slats of a venetian blind, which can clear the view of the underlying layers or completely or partially block them.
  • regions 28 in which the iron pigments 34 are oriented substantially parallel to the substrate plane they limit the view of the underlying printing layer 22 so strongly that the ink layer 26 appears opaque in this region.
  • the opacifying effect of the pigments 34 is of course brought about by a multiplicity of pigments, which exceeds the few pigments 34 in the schematic representation of FIG. 2 by a multiple.
  • the iron pigments 36 release the view of the print layer 22 in the regions 30 in which they are aligned essentially perpendicular to the substrate plane.
  • the color shift effect of the first effect pigments 32 which are not substantially influenced by the external magnetic field, remains visible in both partial areas 28, 30. Due to the superposition with the metallic luster of the second effect pigments oriented parallel to the substrate surface 34, however, it is generally markedly weaker in the partial region 28 than in the partial region 30.
  • the brilliance of the color shift effect in the partial region 30 also depends on the design of the undercoat layer when using dark colors a particularly high brilliance is achieved.
  • FIG. 3 shows a security element 40 which allows an interactive influence on the visual appearance.
  • a substrate 42 is provided with an imprint 43, in particular an ink jet, in the form of patterns and / or marks 45.
  • an imprint 43 in particular an ink jet, in the form of patterns and / or marks 45.
  • a thermochromic background layer 44 is applied, for example by screen printing or intaglio printing.
  • an optically variable ink layer 26 with motif as described in connection with FIG. 2, printed and magnetically aligned.
  • thermochromic layer 44 is designed such that the color shift effect of the color layer 26 disappears upon activation of the thermochromic layer 44 for the viewer and only the coarse structure of the aligned magnetic pigments 34, 36 is visible. For example, if the thermochromic layer 44 changes color from black (or generally a dark appearance) to white (or generally a bright appearance) upon activation by temperature elevation, the brilliance of the color-shift effect is significantly reduced upon activation, to a degree . in which the optically variable effect of the first effect pigments 32 completely disappears for the viewer. At the same time, the imprint 43 can be recognized by the very light layer 44 for the viewer. Upon cooling, the color of the thermochromic layer 44 changes back to black or to the original dark appearance, and the color shift effect of the color layer 26 reappears. At the same time, the dark layer 44 then covers the imprint 43 arranged below it again.
  • thermochromic layer 44 acts as an interactive switch, with which the view of the imprint 43 or the information 45 can be released for the viewer.
  • the described embodiment therefore has a great recognition value for the viewer and generally a very high security against counterfeiting.
  • thermochromic layer 44 may further be formed over the entire surface or with information, for. In the form of patterns and / or characters. It can also have a mixture of different thermochromic colors with different activation temperatures, so that a cascade of changing optically variable effects arises when the temperature increases.
  • FIG. 4 shows a security element 50 in which a background layer 54 with image information is applied to a substrate 52.
  • an optically variable ink layer 56 is printed by screen printing with a pigment mixture 58, 60, the first effect pigments 58 on the basis are made of cholesteric liquid crystalline polymers.
  • These translucent optically variable effect pigments 58 appear in a vertical plan view z. Green and tilting blue. Of course, a change of color from copper to green or from gold to green can also be achieved.
  • the second effect pigments 60 are formed by platelet-shaped iron pigments, which in the exemplary embodiment have a mean platelet diameter of 20 ⁇ m to 30 ⁇ m and a thickness of a few tens to a few hundred nanometers (nm). If these second effect pigments 60 are aligned by an external point-shaped magnet 66, the result is a rotationally symmetrical orientation pattern, as shown schematically in cross-section in FIG. For clarity, the second effect pigments 60 are shown in FIG. 4 with short dashes and the first effect pigments 58 as circular disks, although the latter may also be non-spherical, for example in the form of needles or platelets. However, since the first effect pigments 58 are virtually unaffected by the external magnetic field, their orientation over the entire area of the printed ink layer 56 is substantially homogeneous.
  • a ring-shaped 3D motif combined with the color-shift effect of the first effect pigments 58 is obtained with soft continuous transitions.
  • the color layer 56 is translucent when viewed perpendicularly and the image information of the background layer 54 is visible to the viewer 64.
  • the second effect pigments 60 are increasingly off the vertical tilted, so that the color layer 56 acts increasingly covering in the manner of a closing blind until the image information for the viewer 64 is no longer recognizable.
  • the oblique view of the security element results in a slightly displaced region 62 ', in which the second effect pigments 60 are oriented vertically for the observer 64' and the color layer 56 thus appears translucent. Accordingly, the viewer 64 'can see a slightly shifted section of the image information of the background layer 54, while the image information outside the area 62' is increasingly obscured.
  • the optically variable ink layer with the pigment mixture may be printed not only on an opaque or substantially opaque substrate but also on a transparent or translucent film. As shown in FIG. 5, such a film having the optically variable ink layer may be disposed over a window portion or through opening 72 of a bill 70 to form a see-through security element 74. Only the magnetic orientation of the second effect pigments can be seen by looking through it, which is indicated in FIG. 5 by way of example by a ring structure 76. The color-shift effect of the first effect pigments is virtually invisible on account of the light background when viewed through. If the banknote 70 is placed on a dark background, in addition to the 3D effect of the magnetically oriented motif 76, the color-shift effect of the first effect pigments also appears.
  • Such a dark background may also be provided on the banknote 70 itself.
  • a dark printing area may be arranged on the banknote such that the see-through security element 74 comes to rest on the dark printing area by folding the note.
  • the printing area may contain additional information, from which only the part lying in the translucent area can be seen after folding the banknote.
  • FIG. 6 shows a security element 80 according to the invention with an alternative design of the optically variable ink layer 84.
  • a screen printing ink having magnetically alignable iron pigments 86 is first printed on any substrate 82 and the pigments 86 are aligned in accordance with the desired motif.
  • a pure color layer 90 with optically variable effect pigments 92 is printed on this pure magnetic layer 88. Due to the magnetic orientation of the iron pigments 86, the print pattern appears black in some areas, while in non-oriented areas the metallic impression dominates. In particular, when using effect pigments 92, the visual impression of which strongly depends on the background color, the overprint shows interesting optical effects.
  • the magnetic layer 88 is in principle also arranged above the color layer 90 can be. Due to the opacity of regions with horizontally oriented iron pigments 86, however, the optically variable impression of the effect pigments 92 would then essentially only be recognizable in regions in which iron pigments 86 permit the view of the effect pigments 92 arranged underneath because of their orientation. As a result, in such an embodiment, the observer would perceive a 3D effect (magnetic layer 88), which would be combined in regions with an optically variable effect (color layer 90). At present, however, the embodiment shown in FIG. 6 is preferred in which the ink layer 90 is disposed over the magnetic layer 88.
  • the optically variable ink layer can also be blind embossed in intaglio, in particular for enhancing the 3D optical impression.
  • the platelet-shaped iron pigments preferably used are hard-magnetic, so that their orientation pattern can also be used as a machine-readable authenticity mark.
  • the first and second effect pigments can also be combined with further pigments, in particular with isotropic pigments and / or soft magnetic pigments, which in themselves make substantially no modulation of the magnetic properties of the color layer possible.
  • the orientation of the magnetically alignable effect pigments can also be achieved by using magnetic sieves. In intaglio printing, the use of magnetic throat plates is considered for this purpose.
  • the magnetic alignment of the effect pigments is furthermore possible in a particularly simple manner after the application of the optically variable ink layer by means of a suitable magnetic field.

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

Abstract

La présente invention concerne un élément de sécurité (12) optiquement variable destiné à sécuriser des objets de valeurs, présentant une couche couleur (26) optiquement variable et translucide au moins par zones sur laquelle se trouve une représentation (28, 30) qui se présente sous la forme d'un motif, d'un caractère ou d'un code, la couche couleur (26) comprenant de premiers pigments à effets (32) optiquement variables et de deuxièmes pigments à effet (34, 36) orientables magnétiquement qui sont orientés magnétiquement pour former la représentation (28, 30) souhaitée.
PCT/EP2008/007230 2007-09-11 2008-09-04 Élément de sécurité optiquement variable WO2009033601A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL08785823T PL2200840T3 (pl) 2007-09-11 2008-09-04 Zmienny optycznie element zabezpieczający
EP08785823A EP2200840B1 (fr) 2007-09-11 2008-09-04 Élément de sécurité optiquement variable

Applications Claiming Priority (2)

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DE102007043052A DE102007043052A1 (de) 2007-09-11 2007-09-11 Optisch variables Sicherheitselement
DE102007043052.5 2007-09-11

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WO2009033601A1 true WO2009033601A1 (fr) 2009-03-19

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EP (1) EP2200840B1 (fr)
DE (1) DE102007043052A1 (fr)
PL (1) PL2200840T3 (fr)
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7852751B2 (en) 2008-02-15 2010-12-14 Cisco Technology, Inc. Constructing repair paths around multiple non-available links in a data communications network
DE102009024447A1 (de) 2009-06-10 2010-12-16 Giesecke & Devrient Gmbh Sicherheitselement mit veränderbarem optischen Erscheinungsbild
WO2011092502A2 (fr) 2010-02-01 2011-08-04 De La Rue International Limited Eléments de sécurité et procédés et appareil de fabrication associés
DE102010009977A1 (de) 2010-03-03 2011-09-08 Giesecke & Devrient Gmbh Sicherheitselement mit ausgerichteten Magnetpigmenten
WO2012175212A1 (fr) 2011-06-22 2012-12-27 Giesecke & Devrient Gmbh Encre de sérigraphie magnétique ou encre d'impression flexographique magnétique et élément de sécurité imprimé avec
CN105980162A (zh) * 2014-02-13 2016-09-28 锡克拜控股有限公司 安全线和条
DE102018004439A1 (de) 2018-06-05 2019-12-05 Giesecke+Devrient Currency Technology Gmbh Sicherheitselement mit Magnetmerkmal
CN114590053A (zh) * 2020-12-04 2022-06-07 中钞特种防伪科技有限公司 一种光学防伪元件及其制备方法
CN114590054A (zh) * 2020-12-04 2022-06-07 中钞特种防伪科技有限公司 光学防伪元件及其制备方法
CN114590052A (zh) * 2020-12-04 2022-06-07 中钞特种防伪科技有限公司 一种安全线或条及其制备方法
DE102022000312A1 (de) 2022-01-27 2023-07-27 Giesecke+Devrient Currency Technology Gmbh Folie, Folienbahn, Wertdokument und Verfahren zur Herstellung der solchen
WO2023165863A1 (fr) * 2022-03-01 2023-09-07 Sicpa Holding Sa Caractéristiques de sécurité manifestes
WO2023247969A3 (fr) * 2022-06-23 2024-02-22 Magnetic Id Ltd Fil de sécurité doté d'un élément magnétique

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AR080431A1 (es) * 2010-03-03 2012-04-11 Sicpa Holding Sa Hilo o tira de seguridad que comprende particulas magneticas orientadas en tinta y procedimiento y medio para producir el mismo
DE102011120848B3 (de) * 2011-12-09 2013-05-23 Giesecke & Devrient Gmbh Sicherheitselement für Wertgegenstände, Verfahren zur Herstellung eines Sicherheitselements für Wertgegenstände und tragbarer Datenträger mit einem Sicherheitselement.
EP2890847A4 (fr) * 2012-08-29 2016-04-13 Sicpa Holding Sa Fils et bandes de sécurité optiquement variables
DE202014002374U1 (de) 2014-03-14 2014-06-18 Jörg Rausch Vorrichtung zum Darstellen eines Motivs
DE102014003708B4 (de) 2014-03-14 2016-03-31 Jörg Rausch Vorrichtung zum Darstellen eines Motivs und Verfahren
CN106597580B (zh) * 2015-10-14 2019-09-06 昇印光电（昆山）股份有限公司 成像薄膜及其制备方法
DE102018006314A1 (de) * 2018-08-09 2020-02-13 Giesecke+Devrient Currency Technology Gmbh Plättchenförmiges Effektpigment, Druckfarbe und Datenträger
GB202008165D0 (en) * 2020-06-01 2020-07-15 Bodle Tech Ltd Method of applying a pattern, and security device for an article
DE102022001819A1 (de) 2022-05-24 2023-11-30 Giesecke+Devrient ePayments GmbH Verfahren zur Herstellung eines Sicherheitsmerkmals, Sicherheitsmerkmal für einen Datenträger, Datenträger und Laminierblech

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004024836A2 (fr) 2002-09-13 2004-03-25 Jds Uniphase Corporation Paillettes pigmentaires de diffraction d'alignement
WO2005000585A1 (fr) * 2003-06-30 2005-01-06 Kba-Giori S.A. Machine d'impression
EP1541642A1 (fr) * 2003-12-05 2005-06-15 Rohm And Haas Company Revêtement marquable à base d'une poudre, comprenant un pigment d'interference magnétique
EP1251152B1 (fr) 2001-03-23 2005-09-28 Eckart GmbH & Co. KG Pigments métalliques à effet
EP1669213A1 (fr) 2004-12-09 2006-06-14 Sicpa Holding S.A. Elément de sécurité avec un aspect dépendent de l'angle d'observation
EP1806238A2 (fr) 2005-12-15 2007-07-11 JDS Uniphase Corporation Dispositif de securité utilisant des flocons des pigments diffractifs
WO2007120683A2 (fr) 2006-04-11 2007-10-25 Jds Uniphase Corporation Image de sécurité revêtue d'un seul revêtement à régions visuellement distinctes
EP1970753A1 (fr) 2005-12-28 2008-09-17 Nhk Spring Co.Ltd. Produit d'identification

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1239307A1 (fr) 2001-03-09 2002-09-11 Sicpa Holding S.A. Système magnétique d'interférence de couches minces
DE10163381A1 (de) 2001-12-21 2003-07-03 Giesecke & Devrient Gmbh Sicherheitspapier sowie Verfahren und Vorrichtung zu seiner Herstellung
CA2564764C (fr) 2005-10-25 2014-05-13 Jds Uniphase Corporation Structures optiques a motif avec fonction de securite amelioree

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1251152B1 (fr) 2001-03-23 2005-09-28 Eckart GmbH & Co. KG Pigments métalliques à effet
WO2004024836A2 (fr) 2002-09-13 2004-03-25 Jds Uniphase Corporation Paillettes pigmentaires de diffraction d'alignement
WO2005000585A1 (fr) * 2003-06-30 2005-01-06 Kba-Giori S.A. Machine d'impression
EP1541642A1 (fr) * 2003-12-05 2005-06-15 Rohm And Haas Company Revêtement marquable à base d'une poudre, comprenant un pigment d'interference magnétique
EP1669213A1 (fr) 2004-12-09 2006-06-14 Sicpa Holding S.A. Elément de sécurité avec un aspect dépendent de l'angle d'observation
EP1806238A2 (fr) 2005-12-15 2007-07-11 JDS Uniphase Corporation Dispositif de securité utilisant des flocons des pigments diffractifs
EP1970753A1 (fr) 2005-12-28 2008-09-17 Nhk Spring Co.Ltd. Produit d'identification
WO2007120683A2 (fr) 2006-04-11 2007-10-25 Jds Uniphase Corporation Image de sécurité revêtue d'un seul revêtement à régions visuellement distinctes

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US7852751B2 (en) 2008-02-15 2010-12-14 Cisco Technology, Inc. Constructing repair paths around multiple non-available links in a data communications network
DE102009024447A1 (de) 2009-06-10 2010-12-16 Giesecke & Devrient Gmbh Sicherheitselement mit veränderbarem optischen Erscheinungsbild
WO2010142391A1 (fr) 2009-06-10 2010-12-16 Giesecke & Devrient Gmbh Élément de sécurité comprenant un fluide magnétique
US9649871B2 (en) 2010-02-01 2017-05-16 De La Rue International Limited Security elements, and methods and apparatus for their manufacture
WO2011092502A2 (fr) 2010-02-01 2011-08-04 De La Rue International Limited Eléments de sécurité et procédés et appareil de fabrication associés
US9248637B2 (en) 2010-02-01 2016-02-02 De La Rue International Limited Security elements and methods and apparatus for their manufacture
DE102010009977A1 (de) 2010-03-03 2011-09-08 Giesecke & Devrient Gmbh Sicherheitselement mit ausgerichteten Magnetpigmenten
WO2011107271A1 (fr) 2010-03-03 2011-09-09 Giesecke & Devrient Gmbh Élément de sécurité avec pigments magnétiques alignés
WO2012175212A1 (fr) 2011-06-22 2012-12-27 Giesecke & Devrient Gmbh Encre de sérigraphie magnétique ou encre d'impression flexographique magnétique et élément de sécurité imprimé avec
DE102011105396A1 (de) 2011-06-22 2012-12-27 Giesecke & Devrient Gmbh Magnetische Siebdruckfarbe oder Flexodruckfarbe und damit bedrucktes Sicherheitselement
US10023000B2 (en) 2014-02-13 2018-07-17 Sicpa Holding Sa Security threads and stripes
CN105980162B (zh) * 2014-02-13 2017-09-22 锡克拜控股有限公司 安全线和条
CN105980162A (zh) * 2014-02-13 2016-09-28 锡克拜控股有限公司 安全线和条
DE102018004439A1 (de) 2018-06-05 2019-12-05 Giesecke+Devrient Currency Technology Gmbh Sicherheitselement mit Magnetmerkmal
EP3578380A1 (fr) 2018-06-05 2019-12-11 Giesecke+Devrient Currency Technology GmbH Élément de sécurité à caractéristique magnétique
EP3835075A1 (fr) 2018-06-05 2021-06-16 Giesecke+Devrient Currency Technology GmbH Élément de sécurité à caractéristique magnétique
CN114590054A (zh) * 2020-12-04 2022-06-07 中钞特种防伪科技有限公司 光学防伪元件及其制备方法
CN114590053A (zh) * 2020-12-04 2022-06-07 中钞特种防伪科技有限公司 一种光学防伪元件及其制备方法
CN114590052A (zh) * 2020-12-04 2022-06-07 中钞特种防伪科技有限公司 一种安全线或条及其制备方法
CN114590054B (zh) * 2020-12-04 2023-08-15 中钞特种防伪科技有限公司 光学防伪元件及其制备方法
CN114590052B (zh) * 2020-12-04 2023-08-18 中钞特种防伪科技有限公司 一种安全线或条及其制备方法
CN114590053B (zh) * 2020-12-04 2023-08-18 中钞特种防伪科技有限公司 一种光学防伪元件及其制备方法
DE102022000312A1 (de) 2022-01-27 2023-07-27 Giesecke+Devrient Currency Technology Gmbh Folie, Folienbahn, Wertdokument und Verfahren zur Herstellung der solchen
EP4219185A1 (fr) 2022-01-27 2023-08-02 Giesecke+Devrient Currency Technology GmbH Film, bande de film, document de valeur et procédé de fabrication
WO2023165863A1 (fr) * 2022-03-01 2023-09-07 Sicpa Holding Sa Caractéristiques de sécurité manifestes
WO2023247969A3 (fr) * 2022-06-23 2024-02-22 Magnetic Id Ltd Fil de sécurité doté d'un élément magnétique

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EP2200840A1 (fr) 2010-06-30
EP2200840B1 (fr) 2012-10-31
PL2200840T3 (pl) 2013-03-29
DE102007043052A1 (de) 2009-03-12

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