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EP2465700A2 - Elément de sécurité, son procédé de fabrication et support de données - Google Patents

Elément de sécurité, son procédé de fabrication et support de données Download PDF

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Publication number
EP2465700A2
EP2465700A2 EP11009856A EP11009856A EP2465700A2 EP 2465700 A2 EP2465700 A2 EP 2465700A2 EP 11009856 A EP11009856 A EP 11009856A EP 11009856 A EP11009856 A EP 11009856A EP 2465700 A2 EP2465700 A2 EP 2465700A2
Authority
EP
European Patent Office
Prior art keywords
motif
viewed
recognizable
transmitted light
elements
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.)
Withdrawn
Application number
EP11009856A
Other languages
German (de)
English (en)
Other versions
EP2465700A3 (fr
Inventor
Peter Schiffmann
Evelyn Akoudou
Franz Daniel
Marc Mittelstaedt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and Devrient GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP2465700A2 publication Critical patent/EP2465700A2/fr
Publication of EP2465700A3 publication Critical patent/EP2465700A3/fr
Withdrawn legal-status Critical Current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
    • B42D25/45—Associating two or more layers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
    • G09F3/0294—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time where the change is not permanent, e.g. labels only readable under a special light, temperature indicating labels and the like
    • 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
    • B42D2033/04—
    • B42D2033/06—
    • B42D2033/10—
    • B42D2033/20—
    • B42D2033/30—
    • B42D2035/14—
    • B42D2035/16—
    • B42D2035/36—
    • B42D2035/50—

Definitions

  • the invention relates to a security element for data carriers, in particular for documents of value, identity documents and the like, with a translucent carrier material whose front has a recognizable in front front view incident light first motif and the back has a recognizable when viewed in the rear incident light second motif, said at Contemplation in the front side incident light recognizable first motif and recognizable when viewed in the rear incident light second motif when viewed in transmitted light, a third motif.
  • the invention further relates to a data carrier with such a security element and a method for producing the security element.
  • data carriers such as banknotes, securities, credit cards, identity documents, passports, certificates and the like, labels, packaging or other elements for product protection are provided with security elements that are printed on both sides, translucent Have carrier material.
  • security elements that are printed on both sides, translucent Have carrier material.
  • the protection against forgery of such a security element is based on the fact that in addition to the printed images of the two sides of the carrier material visually also an image can be perceived, which results in transmitted light as a superposition of the front and back printed images (see, for example RL van Renesse, "Optical Document Security", Second Edition, Artech House Publishers, 1998, pp. 155-156 ).
  • the visible image can not be reproduced or insufficiently reproduced by the abovementioned reproduction devices, as a result of which counterfeiting can be easily recognized.
  • From the DE 32 08 204 A1 is a printing method for securing banknotes and other documents against unauthorized imitation known in the z.
  • a banknote from a translucent paper or other carrier material on the front and back with a periodic or almost periodic dot or line pattern is printed.
  • the dot or line pattern in arbitrary sub-areas of the front and back are intentionally offset from each other, so that moire images are generated, which can be detected in transmitted light with the unaided eye and evaluated as an authenticity feature.
  • see-through registers can also be based on partially overlapping structures.
  • Review tabs which are based on partially overlapping structures, offer the designer many options for integrating with other themes.
  • the invention is therefore an object of the invention to provide a security element of the type mentioned, which avoids the disadvantages of the known generic security elements, provides an increased level of security against counterfeiting and can be checked at the same time in a simple manner on its authenticity.
  • a security element of the type mentioned, which avoids the disadvantages of the known generic security elements, provides an increased level of security against counterfeiting and can be checked at the same time in a simple manner on its authenticity.
  • a security element and a method for producing such a security element are provided.
  • a first aspect of the invention relates to a security element with a translucent carrier material, the front of which has a recognizable in front front light first motif with at least a first motif element and the back of a recognizable when viewed in the rear incident light second motif with at least one second motif element, wherein the first motif recognizable when viewed in the front incident light and the second motif recognizable when viewed in the rear incident light when viewed in transmitted light, a third motif, and the at least one first motif element and the at least one second motif element are designed so that this when viewed in transmitted light form a partially overlapping structure, which the viewer perceives as a coherent overall area having a substantially identical visual appearance.
  • the at least one first motif element and the at least one second motif element are preferably each formed by a color layer or a metallic layer.
  • the at least one first motif element and the at least one second motif element can, for example, each be generated by a color layer which is reduced in the area that contributes to the overlap area when viewed in transmitted light, in view of the layer thickness.
  • the at least one first motif element and the at least one second motif element can furthermore each be produced by a color layer, which is reduced in terms of the color intensity in the region which contributes to the overlap region when viewed in transmitted light.
  • the at least one first motif element and the at least one second motif element can furthermore each be produced by a color layer or metallic layer applied in a grid-like manner, which is reduced in terms of the degree of coverage in the area which contributes to the overlap area when viewed in transmitted light.
  • the at least one first motif element and the at least one second motif element can each be produced by an opaque color layer, which is reduced in terms of the hiding power of the color in the region which contributes to the overlap region when viewed in transmitted light.
  • first motif elements
  • the partially overlapping structures formed from the pair of first and second motif elements (X1, Y1) continuously up to the pairs of first and second motif elements (Xm-1, Yn-1) and (Xm, Yn), can each have a first Have motif element and a second motif element, each of which is produced by a color layer, which is reduced in the region which contributes to the overlap region when viewed in transmitted light, with respect to the layer thickness.
  • the partially overlapping structures formed from the pair of first and second motif elements (X1, Y1) continuously up to the pairs of first and second motif elements (Xm-1, Yn-1) and (Xm, Yn), can each have a first Have motif element and a second motif element, each of which is produced by a color layer, which is reduced in the area that contributes to the overlap area when viewed in transmitted light, with respect to the color intensity.
  • the partially overlapping structures formed from the pair of first and second motive elements (X1, Y1) contiguous to the first and second motive element pairs (Xm-1, Yn-1) and (Xm, Yn) may further each be one have first motif element and a second motif element, each of which is generated by a grid-like applied color layer or metallic layer, in the area when viewed in transmitted light contributes to the overlap area, is reduced in terms of the degree of coverage.
  • the partially overlapping structures formed by the pair of first and second motif elements (X1, Y1) continuously up to the pairs of first and second motive elements (Xm-1, Yn-1) and (Xm, Yn), respectively, may be moreover respectively a first motif element and a second motif element, each of which is produced by a covering ink layer, which is reduced in the region which contributes to the overlap region when viewed in transmitted light, with respect to the opacity of the color.
  • the partially overlapping structures formed by the pair of first and second motive elements (X1, Y1) continuously up to the pairs of first and second motive elements (Xm-1, Yn-1) and (Xm, Yn), combinations of include four partially overlapping structures mentioned above.
  • the security element according to the invention comprises both partially overlapping structures with a first motif element and a second motif element, each of which is produced by a color layer which, in the region which contributes to the overlap region when viewed in transmitted light, with respect to the layer thickness and / or with respect to reduced to the color strength, as well as partially overlapping structures with a first motif element and a second motif element, each of which is generated by a grid-like applied color layer or metallic layer, which contributes in the region which contributes when viewed in transmitted light to the overlap region with respect to the degree of coverage is reduced.
  • the second motif recognizable when viewed in the rear incident light each represent, for example, an image motif and the third motif, which results when viewed in transmitted light, represent an alphanumeric information, or vice versa.
  • a second aspect of the invention relates to a data carrier comprising the security element according to the first aspect of the invention.
  • the data carrier may in particular be a value document, e.g. a banknote, or to trade a document of identification or a label.
  • a third aspect of the invention relates to methods for producing a security element, comprising the steps of: providing a translucent carrier material; Providing a first motif recognizable when viewed in the front incident light by generating at least a first motif element on the front side of the translucent substrate material and providing a second motif recognizable when viewed in the rear incident light by generating at least one second motif element on the back side of the translucent substrate such that the first motif recognizable when viewed in the front incident light and the second motif recognizable when viewed in the rear incident light, when viewed in transmitted light, form a third motif, wherein the at least one first motif element and the at least one second motif element are configured in such a way that they are viewed in transmitted light form a partially overlapping structure, which the viewer perceives as a coherent overall area having a substantially identical visual appearance.
  • the at least one first motif element and the at least one second motif element can preferably be formed in each case by a color layer or a metallic layer.
  • the at least one first motif element and the at least one second motif element can be produced, for example, in each case by a color layer, which is reduced in terms of the layer thickness in the region which contributes to the overlap region when viewed in transmitted light.
  • the at least one first motif element and the at least one second motif element can each be produced by a color layer, which is reduced in terms of the color intensity in the region which contributes to the overlap region when viewed in transmitted light.
  • the at least one first motif element and the at least one second motif element can be produced, for example, by a color layer or metallic layer applied in a grid-like manner, which is reduced in terms of the degree of coverage in the region which contributes to the overlap region when viewed in transmitted light.
  • first motif element and the second motif element can each be produced, for example, by a covering color layer which is reduced in terms of the hiding power of the color in the region which contributes to the overlapping region when viewed in transmitted light.
  • the first motive recognizable when viewed in the front-side reflected light can be provided by generating a plurality of first motive elements (X1; ...; Xm-1; Xm) in a number m ⁇ 2 when viewed
  • the partially overlapping structures formed by the pair of first and second motive elements (X1, Y1) continuously up to the pairs of first and second motive elements (Xm-1, Yn-1) and (Xm, Yn), combinations of include four partially overlapping structures mentioned above.
  • the security element according to the invention can comprise both partially overlapping structures with a first motif element and a second motif element, each of which is produced by a color layer which, in the region which contributes to the overlap region when viewed in transmitted light, with respect to the layer thickness and / or in the Reduced in terms of color intensity and / or in terms of hiding power of the color, as well as partially overlapping structures with a first motif element and a second motif element, each generated by a grid-like applied color layer or metallic layer, in the area when viewed in transmitted light contributes to the overlap area, is reduced in view of the degree of coverage.
  • the implementation of the method according to the third aspect of the invention is preferably carried out in such a way that both the at least one first Motiv element, as well as the at least one second motif element are generated by means of a Simandandruckwerks.
  • a transparent region has a high light transmittance of at least 90%, ideally 100%, of the incident visible light.
  • a transparent area does not produce a changed impression with respect to the color and / or intensity of the light passing through the transparent area.
  • a translucent area visibly reduces the intensity of the transmitted light to a viewer and typically has a light transmission of 20% to 80%.
  • Translucent areas can spectrally uniformly reduce the intensity of the transmitted light, such as a gray filter, or have different light transmittances for different spectral areas, such as a color filter. Translucent areas typically have translucent areas which have spectrally different light transmittances and thus produce a color impression in a viewer.
  • the light transmission depends on the layer thickness, so that by a corresponding layer thickness, the light transmission in a given spectral range can be reduced to the desired extent.
  • An opaque area generally has a low light transmission of, for example, less than 20%, preferably less than 10% and ideally of 0%.
  • Opaque areas reduce the intensity of transmitted light spectrally uniform, at least for one observer, so that possibly existing different light transmittances for different spectral areas are no longer perceived.
  • Covering layers of paint produce depending on Layer thickness and degree of coverage opaque or translucent areas with a spectrally uniform light transmission for the viewer.
  • a viewing, for example a security element, in reflected light means illumination from one side and, for example, vertical viewing of the security element from the same side.
  • a reflection in incident light is therefore present when the front of the security element is illuminated and also viewed.
  • viewing in reflected light preferably takes place in front of a white background.
  • a viewing in transmitted light is understood as an illumination of a security element from one side and a viewing of the security element from another side, in particular the opposite side.
  • a reflection in transmitted light is thus, for example, when the back of the security element illuminated and the front of the security element is considered. The light thus shines through the security element and a viewer perceives the light passing through.
  • transmitted light the resulting visual impression of the observer is generated by the light transmission of the different areas of the security element.
  • partially overlapping structure refers to the staggered arrangement of at least one first motif element and at least one second motif element, eg two regions formed by a respective color layer or a metallic layer, on the front side and the back side, respectively Translucent support material to understand, the two motif elements when viewed in the front and in the rear reflected light not exactly abut shock-to-butt to each other, but partially overlap, creating in this way an overlap area and non-overlapping areas.
  • the overlapping of the two motif elements when viewed in transmitted light, results in a darker visual impression of the overlap area.
  • the invention is based on the recognition that the visibility of the see-through information can be considerably improved by transparency registers based on partially overlapping structures, in that the disturbing contrast enhancement in the overlapping area is reduced by printing technology. This reduction can take place on the front and the back of the translucent substrate to varying degrees and be accomplished by a suitable design of the two overlapping motif elements. Overall, however, the reduction in the viewer must result in a substantially identical visual impression of the partially overlapping structure. In other words, the partially overlapping structure is perceived when viewed in transmitted light as a coherent total area with substantially identical visual appearance.
  • the two motif elements which form the partially overlapping structure, or one of the two motif elements, can be conveniently produced by printing in the form of color layers, with advantage a simultaneous printing (or collective printing) is used.
  • the two motif elements which form the partially overlapping structure, or one of the two motif elements, but can also be produced by means of film application.
  • the motif element is first formed on a separate carrier film in the form of a structured (for example screened) paint or metal film and in a subsequent step applied by means of a heat sealing lacquer layer on the translucent substrate.
  • the carrier film can then be removed.
  • the respective motif is first produced on the translucent carrier material in the form of an adhesive layer. Subsequently, the adhesive layer motif is pressed against a metallized film over the entire surface, so that the metallization remains on the adhesive layer motif after detachment of the metallized film.
  • the metal film may, for example, be based on aluminum and may in particular be provided with additional information in the form of matt or glossy effects or holographic structures.
  • the paint film may have additional information in the form of color shift effects or additional luminescent substances.
  • the two motif elements are in each case a full-surface color layer, wherein the reduction of the contrast enhancement in the overlapping area is effected by a suitable adaptation of the color strength of the color layers.
  • This reduction in color intensity can take place to varying degrees on the front and back of the translucent substrate. In sum, however, the reduction must result in a substantially identical visual impression, namely a substantially identical bright-dark contrast.
  • Such an adjustment of the color intensity can be achieved, for example, by reducing the layer thickness of the respective color layer in the overlapping area. Differences in the layer thickness of the respective color layer can be accomplished, for example, by gravure printing.
  • Another way to adjust the color strength is to produce the respective color layer of individual, superposed sub-layers with different hue (eg by offset printing).
  • An area with dark color strength can be produced for example by partial overprinting of a light color layer with a dark color layer.
  • the two motif elements are in each case a full-surface color layer, wherein the color layer is based on a covering printing ink and the reduction of the contrast enhancement in the overlapping region is effected by a suitable adaptation of the hiding power of the color layer.
  • the opaque printing ink may be based on a mixture of a base printing ink containing eg a colored pigment and a colorless, covering printing ink, preferably opaque white (eg TiO 2 ). The opacity of the opacifying ink is adjusted by appropriately selecting the blending ratio between the base ink and the colorless opaque ink.
  • a reduction of the contrast enhancement in the overlapping region of the two motif elements can be achieved in that the color layers in the overlapping region have a reduced opaque white content and thus a reduced translucency.
  • This reduction in translucency may be to varying degrees on the front and back of the translucent substrate. In sum, however, the reduction must result in a substantially identical visual impression, namely a substantially identical bright-dark contrast.
  • the two motif elements are in each case a raster-like applied color layer or metallic layer, wherein the reduction of the contrast enhancement in the overlapping region is adjusted by a suitable adaptation of the optically effective surface coverage and / or a suitable adaptation of the structure size of the raster.
  • the raster elements can, for example, by Grid points, grid lines or are formed by point-like recesses. It is preferred to choose the structure size of the grid so fine that the individual grid elements are no longer visible to the naked eye.
  • the characteristic dimensions of the raster elements, such as size and spacing, are for this purpose preferably less than 100 micrometers or less than 50, 20, 10, 5, 2 or 1 micrometer.
  • the visual impression which the first motif element and the second motif element generate in the overlap area in the viewer in the transparency is based on a mixture between the impression produced by the raster-like applied color layer of the first motif element and the impression that the raster-like applied color layer of the second Creative element created.
  • a reduction in the contrast enhancement in the overlapping region of the two motif elements can be achieved by reducing the optically effective surface coverage and / or the structure size of the grid of the two motif elements in the overlapping region. This reduction can take place to varying degrees on the front and back of the translucent substrate. In sum, however, the reduction must result in a substantially identical visual impression, namely a substantially identical bright-dark contrast.
  • first motif recognizable in the front side incident light has a plurality of first motif elements
  • second motif recognizable in the rear side reflected light has a plurality of second motif elements, so that a plurality of partially overlapping structures is formed when viewed in transmitted light
  • the partially overlapping structures formed by the first and second motif elements may independently of each other on overlapping full-surface color layers, or overlapping grid-like applied color layers or metallic layers according to the aforementioned preferred embodiments.
  • first motif elements and / or second motif elements have machine-readable properties at least in some areas, because such a security element has authenticity features which can be checked in a further security level in addition to the so-called "human features". Such a check may e.g. be of interest to banks and similar institutions.
  • the first motif elements and / or second motif elements may e.g. additional feature substances, such as luminescent feature substances, IR-absorbing feature substances or feature substances with magnetic properties.
  • the first motif (first supervisory information) recognizable when viewed in the front incident light and the second motif (second supervisory information) recognizable when viewed in the rear incident light can, for example, each represent an image motif and the third motif (see-through information) recognizable by transmitted light can display alphanumeric information .
  • the first motif (first supervisory information) recognizable when viewed in the front incident light and the second motif (second supervisory information) recognizable when viewed in the rear incident light can each represent alphanumeric information
  • the third motif (see-through information) recognizable by transmitted light can represent an image motif
  • the supervisory information be different from the review information because the observer is thus caused a surprise effect.
  • the supervisory information consist of a picture motif and the review information of an alphanumeric information, because in this way there is a considerable difference in information.
  • the alphanumeric information may be, for example, the denomination of the data carrier, for example a banknote, which has the security element.
  • the supervisory information and the review information are not locally spaced too far apart to facilitate the viewer's focus. It has been shown that fonts or numbers that are formed in the form of a negative recess can be hidden particularly well in image motifs, so that an early recognition of the transparency information can be avoided.
  • the security element can have further layers and authenticity features, such as e.g. an additional translucent, optically variable layer.
  • any translucent carrier material can be used for the security element.
  • the light transmittance must be at least so great that the first motif or the second motif can be perceived visually in the front reflected light and in the rear reflected light, and in the transmitted light the third motif formed by superposing the first and second motifs can be visually perceived .
  • the use of an additional illumination means to improve the visibility of the transparency information by the observer is conceivable, although the thickness of the material is chosen so that a perception of the transparency information is possible even without tools.
  • paper especially cotton vellum paper, preferred.
  • paper can also be used, which partly contains polymeric material.
  • the carrier material is a plastic film.
  • the film can thereby be made into a translucent film by the transparent plastic film is colored with an opaque material, or an opaque layer is applied in a suitable thickness on the transparent plastic film.
  • Suitable materials for the film are, in particular, PET (polyethylene terephthalate), PBT (polybutylene terephthalate), PEN (polyethylene naphthalate), PP (polypropylene), PA (polyamide) and PE (polyethylene).
  • 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 tools required for exploiting these properties, such as polarization filters, are known to the person skilled in the art.
  • the carrier material 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 security feature of great advantage and also increases the security against counterfeiting.
  • All materials used as a carrier 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 a suitable tool, for. B. a UV or IR radiation emitting radiation source, can be excited to produce a visible or at least detectable luminescence.
  • Other security features can be used with advantage, provided that they do not affect or only slightly affect the viewing of the printed pattern in supervision or the information in transmitted light.
  • the security element according to the invention can be applied to a data carrier, such as security and value documents, such as banknotes, stocks, bonds, certificates, vouchers, bank and ID cards, passports or the like.
  • a data carrier such as security and value documents, such as banknotes, stocks, bonds, certificates, vouchers, bank and ID cards, passports or the like.
  • the disk is equipped in this way with an easily recognizable even to the layman security element to increase the protection against counterfeiting.
  • the security element according to the invention can be used very advantageously in the field of product protection.
  • a data carrier which has a watermark and a security element arranged at least partially in the region of the watermark.
  • FIG. 1a Figure 4 is a cross-sectional view of a conventional see-through register based on partially overlapping structures.
  • the translucent carrier material 1 is formed by a paper layer.
  • first motif elements 2a and 2b On the front side of the paper layer 1 there are generated by means of printing ink, first motif elements 2a and 2b, which together form a recognizable in the front view first image motif.
  • second motif elements 3a and 3b On the backside of the paper layer 1, which are produced by means of printing ink, are formed, which together form a second image motif recognizable in the rear view.
  • the motif elements 2a and 3a and the motif elements 2b and 3b each form a partially overlapping structure in pairs.
  • Fig. 1b the front supervisory information perceptible to the viewer is shown, namely the first image motif formed by the first motif elements 2a and 2b.
  • Fig. 1c the rear supervisory information perceivable to the viewer is shown, namely the second image motif formed by the second motif elements 3a and 3b.
  • Fig. 1d shows the perceptual transparency information perceivable to the viewer.
  • the viewer perceives in transmitted light (both in the front and rear transmitted light) a third motif formed by the front-side first motif elements 2a and 2b and the rear-side second motif elements 3a and 3b in combination.
  • the unprinted areas of the paper layer 1 form the see-through information, for example a typeface or a number, which was initially hidden to the viewer in front and back elevation.
  • the readability of the transparency information formed by the unprinted areas of the paper layer 1 is made more difficult by the partial increase in contrast in the overlapping areas 4a and 4b.
  • Fig. 3 is a cross-sectional view of a partially overlapping structure based see-through register according to one embodiment of the present invention.
  • first motif elements 5a and 5b which together form a recognizable in the front view first image motif.
  • second motif elements 6a and 6b which together form a recognizable in the rear view second image motif.
  • the motif elements 5a and 6a and the motif elements 5b and 6b each form a partially overlapping structure in pairs.
  • the individual motif elements 5a, 5b, 6a and 6b are designed such that the regions 52a, 62a, 52b and 62b contributing to the overlapping regions of the partially overlapping structures are reduced in color intensity compared to the non-overlapping regions 51a, 61a, 51b and 61b are. This can be accomplished, for example, by reducing the layer thickness of the printed ink layer in areas 52a, 62a, 52b and 62b by gravure printing.
  • Fig. 2b the front supervisory information perceptible to the viewer is shown, namely the first image motif formed by the first motif elements 5a and 5b.
  • the front-side supervisory information has a lower color strength in the regions 52a and 52b of the first motif elements than in the regions 51a and 51b of the first motif elements.
  • the readability of the supervisory information on the front is not significantly impaired.
  • Fig. 2c shows the perceptual transparency information perceivable to the viewer.
  • the observer perceives in the transmitted light (both in the front and in the rear transmitted light) a very recognizable third motif, that of the front, first motif elements 5a and 5b, and the rear, second motif elements 6a and 6b in combination in the form of contiguous Overall areas 7a and 7b is formed with substantially identical visual impression.
  • the unprinted areas of the paper layer 1 form clearly recognizable transparency information, for example a typeface or a number, which was initially hidden to the observer when viewed from the front and back.
  • the excellent readability the see-through information formed by the unprinted areas of the paper layer 1 is given by the fact that the areas 52a, 62a, 52b and 62b contributing to the overlapping areas of the partially overlapping structures are reduced in the color intensity.
  • a suitable reduction of the color intensity in the overlapping areas results in a similar bright-dark contrast in the transmitted light as in the non-overlapping areas.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Manufacturing & Machinery (AREA)
  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)
  • Optical Elements Other Than Lenses (AREA)
EP11009856A 2010-12-16 2011-12-14 Elément de sécurité, son procédé de fabrication et support de données Withdrawn EP2465700A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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CN108349291A (zh) * 2015-12-01 2018-07-31 捷德货币技术有限责任公司 防伪元件和设有该防伪元件的数据载体
EP3206884B1 (fr) 2014-10-13 2020-06-24 Oberthur Fiduciaire SAS Element de securite, et document securise
CN113459693A (zh) * 2021-07-05 2021-10-01 中钞印制技术研究院有限公司 防伪结构、防伪物品和防伪结构的制备方法

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WO2023170146A1 (fr) * 2022-03-11 2023-09-14 Veridos Gmbh Support de données comportant des images de motifs qui sont visibles à partir de faces opposées, et procédé de fabrication correspondant

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EP3206884B1 (fr) 2014-10-13 2020-06-24 Oberthur Fiduciaire SAS Element de securite, et document securise
CN108349291A (zh) * 2015-12-01 2018-07-31 捷德货币技术有限责任公司 防伪元件和设有该防伪元件的数据载体
CN107644581A (zh) * 2016-07-22 2018-01-30 昆山科技大学 防伪织品
CN113459693A (zh) * 2021-07-05 2021-10-01 中钞印制技术研究院有限公司 防伪结构、防伪物品和防伪结构的制备方法

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RU2011151279A (ru) 2014-02-10
DE102010054760A1 (de) 2012-02-16

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