DE102010054760A1 - Security element, method of making same and disk - Google Patents

Security element, method of making same and disk

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Publication number
DE102010054760A1
DE102010054760A1 DE102010054760A DE102010054760A DE102010054760A1 DE 102010054760 A1 DE102010054760 A1 DE 102010054760A1 DE 102010054760 A DE102010054760 A DE 102010054760A DE 102010054760 A DE102010054760 A DE 102010054760A DE 102010054760 A1 DE102010054760 A1 DE 102010054760A1
Authority
DE
Germany
Prior art keywords
motif
element
viewed
recognizable
transmitted light
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Withdrawn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
DE102010054760A
Other languages
German (de)
Inventor
Evelyn Akoudou
Franz Daniel
Marc Mittelstaedt
Peter Schiffmann
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
Priority to DE102010054760A priority Critical patent/DE102010054760A1/en
Publication of DE102010054760A1 publication Critical patent/DE102010054760A1/en
Application status is Withdrawn legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40Manufacture
    • B42D25/45Associating two or more layers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29Securities; Bank notes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02Forms or constructions
    • G09F3/0291Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
    • G09F3/0294Labels 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D2033/00Structure or construction of identity, credit, cheque or like information-bearing cards
    • B42D2033/04Transparent material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D2033/00Structure or construction of identity, credit, cheque or like information-bearing cards
    • B42D2033/06Translucent material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D2033/00Structure or construction of identity, credit, cheque or like information-bearing cards
    • B42D2033/10Metallic material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D2033/00Structure or construction of identity, credit, cheque or like information-bearing cards
    • B42D2033/20Coloured material; Pigments or inks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D2033/00Structure or construction of identity, credit, cheque or like information-bearing cards
    • B42D2033/30Plastic material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D2035/00Nature or shape of the markings provided on identity, credit, cheque or like information-bearing cards
    • B42D2035/12Shape of the markings
    • B42D2035/14Dot or raster patterns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D2035/00Nature or shape of the markings provided on identity, credit, cheque or like information-bearing cards
    • B42D2035/12Shape of the markings
    • B42D2035/16Bars or lines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D2035/00Nature or shape of the markings provided on identity, credit, cheque or like information-bearing cards
    • B42D2035/34Markings visible under particular conditions or containing coded information
    • B42D2035/36Markings visible under particular conditions or containing coded information visible in transmitted light, e.g. in a window region
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D2035/00Nature or shape of the markings provided on identity, credit, cheque or like information-bearing cards
    • B42D2035/50Corresponding markings appearing in different shapes or at different places

Abstract

The present invention relates to a security element with a translucent carrier material, the front of which has a recognizable in front front view incident 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 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, 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 a partial form an overlapping structure that the viewer perceives as a coherent overall area having a substantially identical visual appearance.

Description

  • 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.
  • For protection against counterfeiting, particularly with color copiers or other reproduction methods, 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 which are printed on both sides 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.
  • Well-known look-through registers are often based on complementing structures. This is for example from the EP 1 886 827 B1 a printed security element, part of which is formed of a transparent material, the printed security element comprising a first part of an image printed on one side of the transparent material and comprising a second, complementary part of the image which faces the printed opposite side of the transparent material, wherein both parts are printed aligned.
  • From the DE 32 08 204 A1 is a printing method for securing banknotes and other documents against unauthorized imitation known in the z. B. 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. In a variant of the method described in this document, 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.
  • In addition, 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. However, it proves to be disadvantageous that in the area of the overlays a partial increase in contrast occurs, which can reduce the readability of the transparency information.
  • 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. In addition, a data carrier with such a security element and a method for producing such a security element should be provided.
  • This object is achieved by the security element defined in the main claim. A method for producing the same and a data carrier with such a security element are defined in the independent claims. Further developments of the invention are the subject of the dependent claims.
  • 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 be produced, for example, in each case by a color layer which is reduced in terms of the layer thickness in the region which, when viewed in transmitted light, contributes to the overlap region.
  • 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.
  • Moreover, 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.
  • In particular, the security element according to the first aspect of the invention may have a first motif recognizable when viewed in front-side reflected light with a plurality of first motif elements (X1; ...; Xm-1; Xm) in a number m ≥ 2 and one as viewed in FIG rear incident light recognizable second motif having a plurality of second motif elements (Y1; ...; Yn - 1; Yn) in a number n ≥ 2, where m = n, the recognizable in front front light recognizable first motif and the Contemplation in the rear reflected light recognizable second motif when viewed in transmitted light yield a third motif, and the pair of first and second motif element (X1, Y1) continuously up to the pairs of first and second motif element (Xm - 1, Yn - 1) and (Xm, Yn) is in each case designed such that the first motif element and the second motif element when viewed in transmitted light form a partially overlapping structure, which the viewer as coherent overall area with essentially identical visual appearance.
  • 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 by 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) may further each be one first motif element and a second motif element, each of which is produced by a grid-like applied color layer or metallic layer, which is reduced in the region which contributes to the overlap region when viewed in transmitted light, in view of the degree of coverage.
  • 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), respectively, may 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.
  • In particular, 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 motif elements (Xm-1, Yn-1) and (Xm, Yn), combinations of include four partially overlapping structures mentioned above. By way of example, 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 is reduced to the color intensity, 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 in the region which, when viewed in transmitted light for Overlap area contributes, in terms of the degree of coverage is reduced.
  • In the case of the security element according to the first aspect of the invention, for example, the first motif recognizable when viewed in front reflected light and the second motif recognizable when viewed in the rear reflected light can each represent an image motif and the third motif, which results when viewed in transmitted light, an alphanumeric Represent 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 can be, in particular, a value document, for. A banknote, or a passport or label.
  • A third aspect of the invention relates to methods for producing a security element, comprising the steps:
    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.
  • In addition, 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.
  • Furthermore, 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.
  • In addition, the 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 motif recognizable when viewed in front-side reflected light can be provided by generating a plurality of first motif elements (X1; ...; Xm-1; Xm) in a number m ≥ 2, and the second recognizable when viewed in the rear reflected light Motif may be provided by generating a plurality of second motif elements (Y1; ...; Yn-1; Yn) in a number n ≥ 2, where m = n and the pair of first and second motive elements (X1, Y1 ) are continuously configured up to the pairs of first and second motif elements (Xm-1, Yn-1) and (Xm, Yn) in such a way that the first motif element and the second motif element form a partially overlapping structure when viewed in transmitted light, which the viewer perceives as a coherent overall area with substantially identical visual appearance.
  • In particular, 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 motif elements (Xm-1, Yn-1) and (Xm, Yn), combinations of include four partially overlapping structures mentioned above. For example, 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 to Overlap area contributes, in terms of the degree of coverage is reduced.
  • 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 motif element and the at least one second motif element are produced by means of a simultaneous printing unit.
  • The invention will be described below with reference to preferred embodiments.
  • For the purposes of the present invention, a transparent region has a high light transmittance of at least 90%, ideally 100%, of the incident visible light. For a viewer, 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. By contrast, 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. Depending on the layer thickness and degree of coverage, covering color layers produce opaque or translucent areas with a spectrally uniform light transmittance for the viewer.
  • Furthermore, in the present case, 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. To determine the visual impression of a translucent area, viewing in reflected light preferably takes place in front of a white background.
  • In the present case, 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. In transmitted light, the resulting visual impression of the observer is generated by the light transmission of the different areas of the security element.
  • By the term "partially overlapping structure" as used herein, the staggered arrangement of at least a first motif element and at least a second motif element, e.g. B. two areas formed by a respective color layer or a metallic layer, on the front or the back of the translucent substrate to understand, the two motif elements when viewed in the front and in the rear reflected light not exactly abutting butt-to-joint together, but partially overlap, creating an overlap area and non-overlapping areas in this way. 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 of transparency registers based on partially overlapping structures can be considerably improved by reducing the disturbing contrast enhancement in the overlapping area 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. In the hot foil 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 applied in a subsequent step by means of a heat sealing lacquer layer on the translucent substrate. The carrier film can then be removed. In the case of cold foil application, 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.
  • According to a preferred embodiment, 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 reduces the color intensity of the motif elements in the area of the overlap. 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, for. B. be achieved 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 z. B. accomplish by gravure. Another possibility for adapting the color intensity is to produce the respective color layer from individual sub-layers arranged one above the other with different hue (for example by offset printing). An area with dark color strength can be z. B. by partial overprinting a bright color layer with a dark color layer.
  • According to a further preferred embodiment, 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 ink can be applied to a mixture of a base printing ink, the z. B. contains a colored pigment, and a colorless, covering printing ink, preferably opaque white (eg., TiO 2 ), based. 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.
  • According to a further preferred embodiment, 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. B. be formed by screen dots, grid lines or 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.
  • It may also be expedient if the first motif recognizable in the front side incident light has a plurality of first motif elements, and the 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 be independently based on overlapping full-area color layers, or overlapping raster-applied color layers or metallic layers according to the aforementioned preferred embodiments.
  • It can also be expedient if the 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 review may, for. B. for banks and similar institutions of interest. The first motif elements and / or second motif elements can, for. Additional feature substances, such as luminescent feature substances, IR-absorbing feature substances or feature substances with magnetic properties.
  • The first motif (first supervisory information) which can be recognized when viewed in the front incident light and the second motif (second supervisory information) which can be recognized when viewed in the rear incident light can be used, for example, for B. each represent a picture motif and recognizable when viewed in transmitted light third motif (see-through information) can represent an alphanumeric information. Alternatively, 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, and the third motif (see-through information) recognizable by transmitted light can represent an image motif , It is preferable that the supervisory information be different from the review information because the observer is thus caused a surprise effect. It is further preferred that 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 z. B. to the denomination of the disk, z. B. a banknote, act, having the security element. In particular, it is preferred that 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.
  • According to a further preferred embodiment, the security element can have further layers and authenticity features, such. B. an additional translucent, optically variable layer.
  • In principle, any translucent carrier material can be used for the security element. In this case, 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.
  • As a translucent substrate is therefore paper, especially cotton vellum paper, preferred. Of course, paper can also be used, which partly contains polymeric material.
  • Furthermore, it is preferred that the carrier material is a plastic film. In the case of a transparent 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.
  • It may also be expedient if the carrier material is a multilayer composite comprising at least one layer of paper or a comprising papery 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.
  • It is also conceivable, however, to use a multilayer, paper-free composite material as the carrier material. These materials can also be used to advantage in certain climatic regions of the world.
  • 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 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 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. The disk is equipped in this way with an easily recognizable even to the layman security element to increase the protection against counterfeiting. Also, the security element according to the invention can be used very advantageously in the field of product protection.
  • Also preferred is a data carrier which has a watermark and a security element arranged at least partially in the region of the watermark. As a result, a known authenticity feature is advantageously combined with the authenticity feature according to the invention and the counterfeit security is further increased.
  • The invention will be explained in more detail with reference to the following embodiment variants or examples in conjunction with the additional figures. The described individual features and embodiments described below are inventive in their own right, but are also inventive in combination. The examples illustrate preferred embodiments, to which, however, the invention should not be limited in any way.
  • Furthermore, the representations in the figures of better understanding are highly schematized and do not reflect the realities. In particular, the proportions shown in the figures do not correspond to the conditions present in reality and serve exclusively to improve the clarity. Further, those described in the following examples. Embodiments of the sake of clarity reduced to the essential core information. In the practical implementation much more complex patterns or images can be used.
  • In detail, the figures show:
  • 1a to d: a conventional transparent register based on partially overlapping structures; and
  • 2a to c: a see-through register based on partially overlapping structures according to the invention.
  • In 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. On the front of the paper layer 1 are located by means of printing ink, first motif elements 2a and 2 B , which together form a recognizable first image motif in the frontal view. On the back of the paper layer 1 are located by means of printing ink, second motif elements 3a and 3b , which together form a recognizable second image motif in the backside supervision. The motif elements 2a and 3a and the motivational elements 2 B and 3b form a partially overlapping structure in pairs.
  • In 1b the front supervisory information perceptible to the viewer is shown, namely that through the first motif elements 2a and 2 B formed first picture motive.
  • In 1c is the perceptible for the viewer rear supervisory information shown, namely that by the second motif elements 3a and 3b formed second picture motif.
  • 1d shows the perceptual transparency information perceivable to the viewer. The viewer perceives a third motif in the transmitted light (both in the front as well as in the backside transmitted light), that of the front, first motif elements 2a and 2 B , and the back, second motif elements 3a and 3b is formed in combination. The unprinted areas of the paper layer 1 form the review information, for example, a font or a number that was initially hidden for the viewer with front and back supervision. The readability of the through the unprinted areas of the paper layer 1 formed Transparency information is, however, due to the partial increase in contrast in the overlapping areas 4a and 4b difficult.
  • In 2a Fig. 3 is a cross-sectional view of a partially overlapping structure based see-through register according to one embodiment of the present invention. On the front of the paper layer 1 are located by means of printing ink, first motif elements 5a and 5b , which together form a recognizable first image motif in the frontal view. On the back of the paper layer 1 are located by means of printing ink, second motif elements 6a and 6b , which together form a recognizable second image motif in the backside supervision. The motif elements 5a and 6a and the motivational elements 5b and 6b form a partially overlapping structure in pairs. The individual motif elements 5a . 5b . 6a and 6b are designed in such a way that the areas contributing to the overlapping areas of the partially overlapping structures 52a . 62a . 52b and 62b opposite the non-overlapping areas 51a . 61a . 51b and 61b are reduced in color intensity. This can be achieved, for example, by reducing the layer thickness of the printed ink layer in the areas 52a . 62a . 52b and 62b be accomplished by gravure printing.
  • In 2 B the front supervisory information perceptible to the viewer is shown, namely that through the first motif elements 5a and 5b formed first picture motive. The front-side supervisory information points in the areas 52a and 52b Although the first motif elements have a lower color intensity than in the areas 51a and 51b the first motif elements. However, the readability of the supervisory information on the front is not significantly impaired.
  • 2c shows the perceptual transparency information perceivable to the viewer. The viewer perceives in transmitted light (both in the front as well as in the backside transmitted light) a very recognizable third motif, that of the front, first motif elements 5a and 5b , and the back, second motif elements 6a and 6b in combination in the form of coherent overall areas 7a and 7b is formed with essentially identical visual impression. The unprinted areas of the paper layer 1 form a clearly visible review information, for example, a font or a number that was initially hidden for the viewer with front and back supervision. The excellent readability of the unprinted areas of the paper layer 1 The see-through information generated is given by the areas contributing to the overlapping areas of the partially overlapping structures 52a . 62a . 52b and 62b are reduced in 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.
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • EP 1886827 B1 [0003]
    • DE 3208204 A1 [0004]
  • Cited non-patent literature
    • RL van Renesse, "Optical Document Security", Second Edition, Artech House Publishers, 1998, pp. 155-156 [0002]

Claims (24)

  1. Security element with a translucent carrier material, the front side of which has a recognizable in the front incident 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, yield a third motif, and the at least one first motif element and the at least one second motif element are designed so that they form a partially overlapping structure when viewed in transmitted light, perceiving the viewer as a coherent overall area with substantially identical visual impression.
  2. The security element according to claim 1, wherein the at least one first motif element and the at least one second motif element are each a color layer or a metallic layer.
  3. A security element according to claim 1 or 2, wherein the first motif recognizable when viewed in front-side reflected light has a plurality of first motif elements (X1; ...; Xm-1; Xm) in a number m ≥ 2 and recognizable when viewed in the rear reflected light second motif has a plurality of second motif elements (Y1; ...; Yn-1; Yn) in a number n ≥ 2, and m = n, and the pair of first and second motive elements (X1, Y1) are continuous to the first Pairs of first and second motif elements (Xm - 1, Yn - 1) and (Xm, Yn) are each designed such that the first motif element and the second motif element when viewed in transmitted light form a partially overlapping structure that the viewer as a coherent overall area perceives with substantially identical visual impression.
  4. The security element according to claim 1, wherein the at least one first motif element and the at least one second motif element are each produced by a color layer which is reduced in terms of the layer thickness in the region which, when viewed in transmitted light, contributes to the overlap region.
  5. The security element according to claim 1, wherein the at least one first motif element and the at least one second motif element are each 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.
  6. The security element according to one of claims 1 to 3, wherein the at least one first motif element and the at least one second motif element are each produced by a grid-like applied color layer or metallic layer, which contributes to the region of overlap when viewed in transmitted light with respect to the optically effective area coverage and / or the structure size of the grid is reduced.
  7. A security element according to any one of claims 1 to 3, wherein the at least one first motif element and the at least one second motif element are each formed by a covering color layer which in the region contributing to the overlap region when viewed in transmitted light, in view of the opacity of the color is reduced.
  8. The security element according to claim 3, wherein the partially overlapping structures formed by the pair of first and second motive elements (X1, Y1) continuously extend to the first and second motive element pairs (Xm-1, Yn-1) and (Xm, Yn ), two or more of the partially overlapping structures defined in claims 4 to 7.
  9. A security element according to one of the preceding claims, wherein the recognizable in front front view incident light first motif and recognizable when viewed in the rear incident light second motif each represents an image motif and the third motif, which results when viewed in transmitted light, represents an alphanumeric information.
  10. A security element according to any one of claims 1 to 8, wherein the recognizable when viewed in the front reflected light first motif and recognizable when viewed in the rear incident light second motif each represents an alphanumeric information and the third motif, which results when viewed in transmitted light, represents an image motif ,
  11. The security element according to one of the preceding claims, wherein the at least one first motif element and / or the at least one second motif element contains additional feature substances, such as luminescence feature substances, IR-absorbing feature substances or feature substances with magnetic properties.
  12. A data carrier, comprising a security element according to one of claims 1 to 11.
  13. The data carrier according to claim 12, wherein the data carrier is a value document, in particular a banknote, an identity document or a label.
  14. Method for producing a security element, comprising the steps: 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.
  15. The method of claim 14, wherein the at least one first motif element and the at least one second motif element is a respective color layer or a metallic layer.
  16. A method according to claim 14 or 15, wherein the first motif recognizable when viewed in front-side reflected light is provided by generating a plurality of first motif elements (X1; ...; Xm-1; Xm) in a number m ≥ 2, and when recognizable in the back incident light recognizable second motif is provided by a plurality of second motif elements (Y1; ...; Yn - 1; Yn) is generated in a number n ≥ 2, where m = n and the pair of first and second motif element (X1, Y1) continuously up to the pairs of first and second motif element (Xm - 1, Yn - 1) and (Xm, Yn) are each designed so that the first subject element and the second subject element 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.
  17. Method according to one of claims 14 to 16, wherein the at least one first motif element and the at least one second motif element is respectively generated 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.
  18. Method according to one of claims 14 to 16, wherein the at least one first motif element and the at least one second motif element is respectively generated 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 color intensity.
  19. Method according to one of claims 14 to 17, wherein the at least one first motif element and the at least one second motif element is respectively generated by a grid-like applied color layer or metallic layer, which contributes to the region of overlap when viewed in transmitted light, with respect to the optically effective area coverage and / or the structure size of the grid is reduced.
  20. A method according to any one of claims 14 to 17, wherein the at least one first motif element and the at least one second motif element are each formed by a covering color layer which in the region contributing to the overlap region when viewed in transmitted light, in view of the opacity of the color is reduced.
  21. The method of claim 16, wherein the partially overlapping structures formed from the pair of first and second motive elements (X1, Y1) continuously extend to the first and second motive element pairs (Xm-1, Yn-1) and (Xm, Yn ), at least two of the partially overlapping structures defined in claims 17 to 20.
  22. Method according to one of claims 14 to 21, wherein the recognizable when viewed in the front reflected light first motif and recognizable when viewed in the rear incident light second motif each represents an image motif and the third motif, which results when viewed in transmitted light, represents an alphanumeric information ,
  23. Method according to one of claims 14 to 21, wherein the recognizable when viewed in the front reflected light first motif and recognizable when viewed in the rear incident light second motif each represents an alphanumeric information and the third motif, which results when viewed in transmitted light, represents a picture motif ,
  24. Method according to one of claims 14 to 23, wherein both the at least one first motif element, as well as the at least one second motif element are produced by means of a Simandandruckwerks.
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EP11009856A EP2465700A3 (en) 2010-12-16 2011-12-14 Security element, method for producing same and record carrier
RU2011151279/12A RU2011151279A (en) 2010-12-16 2011-12-15 Protective element, method of its manufacture and media

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WO1995009731A1 (en) * 1993-10-07 1995-04-13 Central Research Laboratories Limited A composite image arrangement
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