EP2746059B1 - Safety element with tilting effect - Google Patents

Safety element with tilting effect Download PDF

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Publication number
EP2746059B1
EP2746059B1 EP13005877.9A EP13005877A EP2746059B1 EP 2746059 B1 EP2746059 B1 EP 2746059B1 EP 13005877 A EP13005877 A EP 13005877A EP 2746059 B1 EP2746059 B1 EP 2746059B1
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EP
European Patent Office
Prior art keywords
coating
incident light
regions
layer thickness
reduced layer
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.)
Active
Application number
EP13005877.9A
Other languages
German (de)
French (fr)
Other versions
EP2746059A3 (en
EP2746059A2 (en
Inventor
Walter Dr. Dörfler
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 Currency Technology GmbH
Original Assignee
Giesecke and Devrient Currency Technology 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.)
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Publication date
Application filed by Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Priority to PL13005877T priority Critical patent/PL2746059T3/en
Publication of EP2746059A2 publication Critical patent/EP2746059A2/en
Publication of EP2746059A3 publication Critical patent/EP2746059A3/en
Application granted granted Critical
Publication of EP2746059B1 publication Critical patent/EP2746059B1/en
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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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/346—Perforations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/373—Metallic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
    • B42D2033/24—
    • B42D2035/20—
    • B42D2035/30—

Definitions

  • the invention relates to a security element for increasing the protection against forgery of security papers, documents of value, identity cards or products of any kind, wherein the security element consists of a substrate whose surface diffusely reflects incident light, and consists of a coating which at least partially covers the surface of the substrate, wherein the surface of the coating reflects incident light at least partially specularly.
  • a security element with an optically variable structure which has an embossed structure which in turn consists of a plurality of non-linear, raised embossed elements.
  • the optically variable structure has at least one first piece of additional information, at least in a first sub-area, which is created by varying the geometric shape of the non-linear embossed elements through shading effects.
  • the at least one first piece of additional information is created here by at least one partial section from the geometry of the respective non-linear embossed elements, so that the respective geometric shape of the non-linear embossed elements lacks this at least one partial section.
  • a security element with an optically variable structure which has a multiplicity of first embossed structures, each of the first embossed structures consisting of at least two flanks which converge at at least one specific angle.
  • at least one flank of the first embossed structures each has at least one additional embossed structure that is on the flank of the first embossed structures is placed or inserted into the flank of the first embossed structures.
  • the geometry of the at least one additional embossed structure is implemented at least almost inversely to the geometry of that flank of the first embossed structure on which the at least one additional embossed structure is placed or inserted.
  • a security element with an optically variable structure which has a plurality of embossed elements, each of the embossed elements consisting of at least two flanks which converge at a specific angle and / or a specific direction.
  • the surface of the embossing elements is reflective.
  • the security element consists of at least two groups of embossed elements, the at least two groups only differing from one another in the angle and / or the direction with which the flanks of the embossed elements converge.
  • Each embossing element has a regular hexagonal base.
  • a data carrier with an optically variable element which has a directionally reflective surface.
  • the directionally reflective surface is combined with a diffusely scattering surface element, so that markings are created.
  • the directionally reflecting surface and the diffusely scattering surface element are designed in such a way that the intensity of the directionally reflected light is higher at least in one viewing angle range and lower in at least another viewing angle range than the intensity of the light that is emitted by the diffuse scattering surface area.
  • a reflective surface or coating is thus provided with a special embossed structure, so that an optically variable effect results for a viewer.
  • the invention is therefore based on the object of developing a generic security element in such a way that the protection against counterfeiting is further increased.
  • the coating of the security element has areas with reduced layer thickness and / or with cutouts, these areas for an observer at certain viewing angles only a little or no recognizable and at other viewing angles a clearly recognizable contrast to the surrounding areas of the coating without reduced layer thickness or without recesses.
  • the areas with reduced layer thickness and / or with gaps in relation to the specularly reflecting environment appear light or dark or almost completely disappear to the viewer.
  • the specularly reflective coating of the security element reflects, for example, the incident light directly into the viewer's eye, the coating appears light in incident light, whereas the areas with reduced layer thickness and / or with cutouts appear dark. If the security element is now tilted so that the specularly reflective coating does not reflect the incident light towards the viewer, the coating appears dark in incident light, whereas the areas with reduced layer thickness and / or with cutouts appear light. In a viewing angle range between these two extreme cases, in which the specularly reflective coating reflects the incident light essentially just past the eye of the beholder, the coating and the areas with reduced layer thickness and / or with cutouts appear equally or almost equally bright in incident light.
  • the substrate is not completely opaque, but rather at least translucent, the areas with reduced layer thickness and / or with cutouts can also be seen particularly advantageously in transmitted light.
  • observation in incident light is illumination of an object from one side and observation of the object from the same side.
  • An observation in incident light is thus present, for example, when the front side of the object is illuminated and also observed.
  • viewing in transmitted light is illuminating an object from one side and viewing the object from another side, in particular the opposite side. Viewing in transmitted light is therefore present, for example, when the back of the object is illuminated and the front of the object is viewed. The light thus shines through the object.
  • Translucency in the context of this invention means that an object, such as the substrate or the plastic film, allows a certain proportion of incident light to pass through. If light hits one side of the object, a certain proportion of the light will pass through to the other side of the object left and exits there again. The greater the percentage of the light passing through in relation to the incident light, the more translucent the object. If the percentage is at least 90%, ie if the object allows the incident light to pass through almost unimpaired, as in a window, the object is referred to as transparent.
  • the invention further relates to a method for producing an above-mentioned security element for increasing the protection against forgery of security papers, documents of value, identity cards or products of any kind.
  • a substrate is provided whose surface diffusely reflects incident light, and a coating is applied to the substrate which at least partially covers the surface of the substrate, the surface of the coating reflecting incident light at least partially in a specular manner.
  • the coating is now partially or completely removed in areas, so that areas of the coating with reduced layer thickness and / or with cutouts are produced. For an observer, at certain viewing angles, these areas have no or only a slightly recognizable contrast and, at other viewing angles, a clearly recognizable contrast with respect to the surrounding areas of the coating without a reduced layer thickness or without gaps.
  • the coating has a shiny metallic surface, which is particularly preferably has a silver, golden or copper-colored color impression.
  • the surface of the embossed elements is particularly preferably provided with a reflective or metallic or metallic reflective coating, so that the surface reflects the incident light in an almost specular manner.
  • the coating preferably has a silver, golden or copper-colored color impression.
  • the coating is preferably printed onto the substrate using printing inks with metallic or metal-like pigments become. It has been shown that a metallic or metal-like color has a particularly high contrast and thus produces a particularly pronounced tilting effect, since the incident light is primarily reflected in a specular manner and only to a small extent diffusely reflected.
  • the print or the coating is applied to the substrate, for example, by screen printing, as a silver-colored patch or as a silver-colored film.
  • the coating can also be vapor-deposited onto the substrate, a metallic or metal-like material first being vaporized by means of PVD (physical vapor deposition) or CVD (chemical vapor deposition) and then being deposited on the surface of the substrate.
  • PVD physical vapor deposition
  • CVD chemical vapor deposition
  • Specular or directed reflection occurs on flat or smooth surfaces, the size of the angle of incidence being equal to the size of the angle of reflection.
  • the substrate preferably comprises paper and / or a film, in particular a translucent film.
  • the substrate consists entirely of either paper or plastic.
  • the substrate can also consist of different materials in some areas, and in particular consist of paper in one area and at the same time consist of plastic in another area, preferably of a translucent film.
  • Translucent film is understood here to mean either a transparent or a semitransparent film, for example a translucent film, which for example Contains polyamide, polyester, polyethylene or biaxially oriented polypropylene (BOPP).
  • Documents of value in the sense of the present invention are in particular banknotes, shares, bonds, certificates, vouchers, checks, high-quality entry tickets, but also other papers at risk of forgery, such as passports or other identification documents, and also card-shaped data carriers, in particular chip cards, as well as product security elements such as labels, seals , Packaging and the like.
  • the term “document of value” also encompasses non-circulatory preliminary stages of such data carriers which, for example in the case of security paper, are in quasi-endless form and are further processed at a later point in time.
  • the areas of the coating with reduced layer thickness and / or with cutouts are produced by a laser beam, the coating being partially and / or completely removed by the laser beam.
  • the areas of the coating with reduced layer thickness and / or with recesses represent alphanumeric characters and / or graphic images.
  • the optically variable structure consists of an embossed structure of a multiplicity of linear and / or non-linear ones Embossing elements.
  • Such an optically variable structure is off DE 10 2011 114 644 , DE 10 2011 114 647 and DE 10 2011 114 645 known, the disclosure content of which is fully included in this regard, in particular the passages given in the introduction to the description above.
  • the superimposition of the optically variable effect of this invention with the optically variable effect of the embossed structures "distracts" the viewer's eye by the additional information of the embossed structures. This results in a larger viewing angle range in which the coating and the areas with reduced layer thickness and / or with cutouts appear equally or almost equally bright in incident light.
  • Fig. 1 shows schematically a security element 1 according to the invention, wherein according to Fig. 1a the specularly reflective coating of the security element reflects the incident light beam 2 into the light beam 3, the reflected light beam 3 being reflected directly into the eye 4 of the viewer. According to Figure 1b In incident light, the coating 5 appears light, whereas the areas 6 with reduced layer thickness and / or with cutouts appear dark. The areas 6 here form the alphanumeric character sequence "12345".
  • Fig. 3 shows in Fig. 3a the viewing angle range between the two extreme cases of FIGS. 1 and 2 , in which the specularly reflective coating of the security element 1 reflects the incident light 2 essentially just past the eye 4 of the viewer. In this case appear in reflected light according to Figure 3b the coating 5 and the areas 6 with reduced layer thickness and / or with recesses equally or almost equally bright.

Description

Die Erfindung betrifft ein Sicherheitselement zur Erhöhung des Fälschungsschutzes von Sicherheitspapieren, Wertdokumenten, Ausweiskarten oder Produkten jeglicher Art, wobei das Sicherheitselement aus einem Substrat besteht, dessen Oberfläche auftreffendes Licht diffus reflektiert, und aus einer Beschichtung besteht, die die Oberfläche des Substrats mindestens teilweise bedeckt, wobei die Oberfläche der Beschichtung auftreffendes Licht mindestens teilweise spiegelnd reflektiert.The invention relates to a security element for increasing the protection against forgery of security papers, documents of value, identity cards or products of any kind, wherein the security element consists of a substrate whose surface diffusely reflects incident light, and consists of a coating which at least partially covers the surface of the substrate, wherein the surface of the coating reflects incident light at least partially specularly.

Hierzu ist beispielsweise aus der DE 10 2011114 644 ein Sicherheitselement mit einer optisch variablen Struktur bekannt, die eine Prägestruktur aufweist, die wiederum aus einer Vielzahl von nicht linienförmigen, erhabenen Prägeelementen besteht. Des Weiteren weist die optisch variable Struktur mindestens in einem ersten Teilbereich mindestens eine erste Zusatzinformation auf, die durch Variation der geometrischen Form der nicht linienförmigen Prägeelemente durch Abschattungseffekte entsteht. Die mindestens eine erste Zusatzinformation entsteht hierbei durch mindestens einen partiellen Ausschnitt aus der Geometrie der jeweiligen nicht linienförmigen Prägeelemente, so dass der jeweiligen geometrischen Form der nicht linienförmigen Prägeelemente dieser mindestens eine partielle Ausschnitt fehlt.For this purpose, for example, from the DE 10 2011 114 644 a security element with an optically variable structure is known which has an embossed structure which in turn consists of a plurality of non-linear, raised embossed elements. Furthermore, the optically variable structure has at least one first piece of additional information, at least in a first sub-area, which is created by varying the geometric shape of the non-linear embossed elements through shading effects. The at least one first piece of additional information is created here by at least one partial section from the geometry of the respective non-linear embossed elements, so that the respective geometric shape of the non-linear embossed elements lacks this at least one partial section.

Aus der DE 10 2011 114 647 ist ein Sicherheitselement mit einer optisch variablen Struktur bekannt, die eine Vielzahl von ersten Prägestrukturen aufweist, wobei jede der ersten Prägestrukturen aus mindestens zwei Flanken besteht, die in mindestens einem bestimmten Winkel aufeinander zulaufen. In mindestens einem ersten Teilbereich der optisch variablen Struktur weist mindestens eine Flanke der ersten Prägestrukturen jeweils mindestens eine zusätzliche Prägestruktur auf, die auf die Flanke der ersten Prägestrukturen aufgesetzt oder in die Flanke der ersten Prägestrukturen eingesetzt ist. Hierbei ist die Geometrie der mindestens einen zusätzlichen Prägestruktur mindestens nahezu invers zu der Geometrie derjenigen Flanke der ersten Prägestruktur ausgeführt, auf der die mindestens eine zusätzliche Prägestruktur aufgesetzt bzw. eingesetzt ist.From the DE 10 2011 114 647 a security element with an optically variable structure is known which has a multiplicity of first embossed structures, each of the first embossed structures consisting of at least two flanks which converge at at least one specific angle. In at least a first partial area of the optically variable structure, at least one flank of the first embossed structures each has at least one additional embossed structure that is on the flank of the first embossed structures is placed or inserted into the flank of the first embossed structures. Here, the geometry of the at least one additional embossed structure is implemented at least almost inversely to the geometry of that flank of the first embossed structure on which the at least one additional embossed structure is placed or inserted.

Des Weiteren ist aus der DE 10 2011 114 645 ein Sicherheitselement mit einer optisch variablen Struktur bekannt, die eine Vielzahl von Prägeelementen aufweist, wobei jedes der Prägeelemente aus mindestens zwei Flanken besteht, die in einem bestimmten Winkel und/oder einer bestimmten Richtung aufeinander zulaufen. Die Oberfläche der Prägeelemente ist reflektierend ausgeführt. Des Weiteren besteht das Sicherheitselement aus mindestens zwei Gruppen von Prägeelementen, wobei sich die mindestens zwei Gruppen lediglich in dem Winkel und/ oder der Richtung, mit dem bzw. der die Flanken der Prägeelemente aufeinander zulaufen, voneinander unterscheiden. Hierbei weist jedes Prägeelement eine regelmäßige sechseckige Grundfläche auf.Furthermore, from the DE 10 2011 114 645 a security element with an optically variable structure is known which has a plurality of embossed elements, each of the embossed elements consisting of at least two flanks which converge at a specific angle and / or a specific direction. The surface of the embossing elements is reflective. Furthermore, the security element consists of at least two groups of embossed elements, the at least two groups only differing from one another in the angle and / or the direction with which the flanks of the embossed elements converge. Each embossing element has a regular hexagonal base.

Aus EP 0 723 246 A2 ist ein Datenträger mit einem optisch variablen Element bekannt, welches eine gerichtet reflektierende Fläche aufweist. Die gerichtet reflektierende Fläche wird mit einem diffus streuenden Flächenelement kombiniert, so dass Kennzeichnungen entstehen. Die gerichtet reflektierende Fläche und das diffus streuende Flächenelement sind dabei so beschaffen, dass die Intensität des gerichtet reflektierten Lichtes zumindest in einem Betrachtungswinkelbereich höher und zumindest in einem anderen Betrachtungswinkelbereich niedriger ist als die Intensität des Lichtes, das von dem diffus streuenden Flächenbereich abgestrahlt wird.Out EP 0 723 246 A2 a data carrier with an optically variable element is known which has a directionally reflective surface. The directionally reflective surface is combined with a diffusely scattering surface element, so that markings are created. The directionally reflecting surface and the diffusely scattering surface element are designed in such a way that the intensity of the directionally reflected light is higher at least in one viewing angle range and lower in at least another viewing angle range than the intensity of the light that is emitted by the diffuse scattering surface area.

In den genannten Schriften des Standes der Technik wird somit eine reflektierende Oberfläche bzw. Beschichtung mit einer speziellen Prägestruktur versehen, so dass sich für einen Betrachter ein optisch variabler Effekt ergibt.In the cited prior art documents, a reflective surface or coating is thus provided with a special embossed structure, so that an optically variable effect results for a viewer.

Der Erfindung liegt deshalb die Aufgabe zugrunde, ein gattungsgemäßes Sicherheitselement derart weiterzubilden, dass der Schutz gegenüber Fälschungen weiter erhöht wird.The invention is therefore based on the object of developing a generic security element in such a way that the protection against counterfeiting is further increased.

Diese Aufgabe wird durch die Merkmale der unabhängigen Ansprüche gelöst. Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche.This object is achieved by the features of the independent claims. Developments of the invention are the subject of the dependent claims.

Erfindungsgemäß weist die Beschichtung des Sicherheitselements Bereiche mit verminderter Schichtdicke und/oder mit Aussparungen auf, wobei diese Bereiche für einen Betrachter bei bestimmten Betrachtungswinkeln keinen oder nur einen geringfügig erkennbaren und bei anderen Betrachtungswinkeln einen deutlich erkennbaren Kontrast gegenüber den umliegenden Bereichen der Beschichtung ohne verminderte Schichtdicke bzw. ohne Aussparungen aufweisen.According to the invention, the coating of the security element has areas with reduced layer thickness and / or with cutouts, these areas for an observer at certain viewing angles only a little or no recognizable and at other viewing angles a clearly recognizable contrast to the surrounding areas of the coating without reduced layer thickness or without recesses.

Abhängig vom Betrachtungswinkel und dem Winkel des einfallenden Lichtes erscheinen die Bereiche mit verminderter Schichtdicke und/oder mit Aussparungen gegenüber der spiegelnd reflektierenden Umgebung hell oder dunkel oder verschwinden für den Betrachter nahezu vollständig.Depending on the viewing angle and the angle of the incident light, the areas with reduced layer thickness and / or with gaps in relation to the specularly reflecting environment appear light or dark or almost completely disappear to the viewer.

Reflektiert die spiegelnd reflektierende Beschichtung des Sicherheitselements beispielsweise das einfallende Licht direkt in das Auge des Betrachters, erscheint in Auflicht die Beschichtung hell, wohingegen die Bereiche mit verminderter Schichtdicke und/oder mit Aussparungen dunkel erscheinen. Wird nun das Sicherheitselement so verkippt, dass die spiegelnd reflektierende Beschichtung das einfallende Licht nicht zum Betrachter hin reflektiert, erscheint in Auflicht die Beschichtung dunkel, wohingegen die Bereiche mit verminderter Schichtdicke und/oder mit Aussparungen hell erscheinen. In einem Blickwinkelbereich zwischen diesen beiden Extremfällen, in dem die spiegelnd reflektierende Beschichtung das einfallende Licht im Wesentlichen knapp am Auge des Betrachters vorbei reflektiert, erscheinen in Auflicht die Beschichtung und die Bereiche mit verminderter Schichtdicke und/oder mit Aussparungen gleich oder nahezu gleich hell.If the specularly reflective coating of the security element reflects, for example, the incident light directly into the viewer's eye, the coating appears light in incident light, whereas the areas with reduced layer thickness and / or with cutouts appear dark. If the security element is now tilted so that the specularly reflective coating does not reflect the incident light towards the viewer, the coating appears dark in incident light, whereas the areas with reduced layer thickness and / or with cutouts appear light. In a viewing angle range between these two extreme cases, in which the specularly reflective coating reflects the incident light essentially just past the eye of the beholder, the coating and the areas with reduced layer thickness and / or with cutouts appear equally or almost equally bright in incident light.

Ist das Substrat nicht vollständig opak, sondern mindestens transluzent, sind die Bereiche mit verminderter Schichtdicke und/oder mit Aussparungen besonders vorteilhaft auch in Durchlicht zu erkennen.If the substrate is not completely opaque, but rather at least translucent, the areas with reduced layer thickness and / or with cutouts can also be seen particularly advantageously in transmitted light.

Eine Betrachtung in Auflicht ist im Sinne dieser Erfindung eine Beleuchtung eines Objektes von einer Seite und eine Betrachtung des Objektes von derselben Seite. Eine Betrachtung in Auflicht liegt somit beispielsweise dann vor, wenn die Vorderseite des Objektes beleuchtet und auch betrachtet wird. Eine Betrachtung in Durchlicht ist im Sinne dieser Erfindung eine Beleuchtung eines Objektes von einer Seite und eine Betrachtung des Objektes von einer anderen Seite, insbesondere der gegenüberliegenden Seite. Eine Betrachtung in Durchlicht liegt somit beispielsweise dann vor, wenn die Rückseite des Objektes beleuchtet und die Vorderseite des Objektes betrachtet wird. Das Licht scheint somit durch das Objekt hindurch.In the context of this invention, observation in incident light is illumination of an object from one side and observation of the object from the same side. An observation in incident light is thus present, for example, when the front side of the object is illuminated and also observed. In the context of this invention, viewing in transmitted light is illuminating an object from one side and viewing the object from another side, in particular the opposite side. Viewing in transmitted light is therefore present, for example, when the back of the object is illuminated and the front of the object is viewed. The light thus shines through the object.

Transluzenz im Sinne dieser Erfindung bedeutet, dass ein Objekt, wie das Substrat oder die Kunststofffolie, auftreffendes Licht in einem bestimmten Anteil hindurchtreten lässt. Trifft Licht auf eine Seite des Objekts auf, wird ein bestimmter Anteil des Lichtes bis zu der anderen Seite des Objekts hindurch gelassen und tritt dort wieder aus. Je größer der prozentuale Anteil des hindurchtretenden Lichtes bezogen auf das auftreffende Licht ist, desto transluzenter ist das Objekt. Liegt der prozentuale Anteil bei mindestens 90 %, d.h. lässt das Objekt das auftreffende Licht wie bei einem Fenster nahezu ungeschwächt hindurchtreten, wird das Objekt als transparent bezeichnet. Ein Objekt hingegen, das weniger als 20 %, bevorzugt unter 10 % und besonders bevorzugt etwa 0 % des auftreffenden Lichtes hindurchtreten lässt, d.h. bei dem der Anteil des hindurchtretenden Lichtes bezogen auf das auftreffende Licht gering oder nahe oder gleich Null ist, wird als opak oder als nicht lichtdurchlässig bezeichnet.Translucency in the context of this invention means that an object, such as the substrate or the plastic film, allows a certain proportion of incident light to pass through. If light hits one side of the object, a certain proportion of the light will pass through to the other side of the object left and exits there again. The greater the percentage of the light passing through in relation to the incident light, the more translucent the object. If the percentage is at least 90%, ie if the object allows the incident light to pass through almost unimpaired, as in a window, the object is referred to as transparent. On the other hand, an object that allows less than 20%, preferably less than 10% and particularly preferably about 0% of the incident light to pass through, ie in which the proportion of the light passing through is low or close to or equal to zero in relation to the incident light, becomes opaque or designated as not translucent.

Die Erfindung betrifft weiterhin ein Verfahren zur Herstellung eines oben genannten Sicherheitselements zur Erhöhung des Fälschungsschutzes von Sicherheitspapieren, Wertdokumenten, Ausweiskarten oder Produkten jeglicher Art. Hierbei wird zunächst ein Substrat bereitgestellt, dessen Oberfläche auftreffendes Licht diffus reflektiert, und auf das Substrat eine Beschichtung aufgebracht, die die Oberfläche des Substrats mindestens teilweise bedeckt, wobei die Oberfläche der Beschichtung auftreffendes Licht mindestens teilweise spiegelnd reflektiert. Erfindungsgemäß wird nun die Beschichtung bereichsweise teilweise oder vollständig entfernt, so dass Bereiche der Beschichtung mit verminderter Schichtdicke und/oder mit Aussparungen erzeugt werden. Diese Bereiche weisen für einen Betrachter bei bestimmten Betrachtungswinkeln keinen oder nur einen geringfügig erkennbaren Kontrast und bei anderen Betrachtungswinkeln einen deutlich erkennbaren Kontrast gegenüber den umliegenden Bereichen der Beschichtung ohne verminderte Schichtdicke bzw. ohne Aussparungen auf.The invention further relates to a method for producing an above-mentioned security element for increasing the protection against forgery of security papers, documents of value, identity cards or products of any kind. First, a substrate is provided whose surface diffusely reflects incident light, and a coating is applied to the substrate which at least partially covers the surface of the substrate, the surface of the coating reflecting incident light at least partially in a specular manner. According to the invention, the coating is now partially or completely removed in areas, so that areas of the coating with reduced layer thickness and / or with cutouts are produced. For an observer, at certain viewing angles, these areas have no or only a slightly recognizable contrast and, at other viewing angles, a clearly recognizable contrast with respect to the surrounding areas of the coating without a reduced layer thickness or without gaps.

Gemäß einer bevorzugten Ausführungsform ist vorgesehen, dass die Beschichtung eine metallisch glänzende Oberfläche aufweist, die besonders bevorzugt einen silbernen, goldenen oder kupferfarbenen Farbeindruck aufweist.According to a preferred embodiment it is provided that the coating has a shiny metallic surface, which is particularly preferably has a silver, golden or copper-colored color impression.

Die Oberfläche der Prägeelemente ist besonders bevorzugt mit einer reflektierenden oder metallischen oder metallisch reflektierenden Beschichtung versehen, so dass die Oberfläche das auftreffende Licht nahezu spiegelnd reflektiert. Bevorzugt weist die Beschichtung hierbei einen silbernen, goldenen oder kupferfarbenen Farbeindruck auf.The surface of the embossed elements is particularly preferably provided with a reflective or metallic or metallic reflective coating, so that the surface reflects the incident light in an almost specular manner. The coating preferably has a silver, golden or copper-colored color impression.

Diese Beschichtung, die auf das Substrat aufgebracht ist, ist bevorzugt wie folgt ausgeführt:

  • als eine metallische oder metallisch anmutende Siebdruckfarbe,
  • als eine Farbe mit optisch variablen Pigmenten, bevorzugt sogenannten OVI-Pigmenten,
  • als eine Farbe mit optisch variablen Pigmenten, die zusätzlich magnetisch ausrichtbar sind, bevorzugt sogenannte OVMI-Pigmente,
  • als eine Farbe mit optisch variablen Iriodin-Pigmenten z.B. der Fa. Bayer, die im Flexodruck oder Siebdruck aufgebracht ist und bevorzugt mit einem im Offsetdruck aufgebrachten Untergrund kombiniert ist,
  • als eine Folie in Form eines Streifens oder Patches, die auf das Substrat appliziert ist,
  • als glänzende Offsetfarbe, die bevorzugt eine metallisch glänzende Oberfläche aufweist,
  • als glänzende Stichtiefdruckfarbe, die bevorzugt einen schwarzen Farbton aufweist oder farblos ist oder auch eine metallisch glänzende Anmutung aufweisen kann, wie beispielsweise Gold oder Silber.
This coating, which is applied to the substrate, is preferably carried out as follows:
  • as a metallic or metallic-looking screen printing ink,
  • as a color with optically variable pigments, preferably so-called OVI pigments,
  • as a color with optically variable pigments that can also be magnetically aligned, preferably so-called OVMI pigments,
  • as a color with optically variable Iriodin pigments, e.g. from Bayer, which is applied using flexographic or screen printing and is preferably combined with a background applied using offset printing,
  • as a film in the form of a strip or patch that is applied to the substrate,
  • as a glossy offset ink, which preferably has a metallic glossy surface,
  • as a glossy intaglio printing ink, which preferably has a black hue or is colorless or can also have a shiny metallic appearance, such as gold or silver.

Die Beschichtung wird bevorzugt auf das Substrat aufgedruckt, wobei Druckfarben mit metallischen oder metallartigen Pigmenten verwendet werden. Es hat sich gezeigt, dass ein metallischer oder metallartiger Farbton einen besonders hohen Kontrast aufweist und damit einen besonders ausgeprägten Kippeffekt hervorruft, da hierbei das auftreffende Licht vor allem spiegelnd und nur zu einem geringen Anteil diffus reflektiert wird. Der Aufdruck bzw. die Beschichtung ist beispielsweise im Siebdruck, als silberfarbener Patch oder als silberfarbene Folie auf das Substrat aufgebracht.The coating is preferably printed onto the substrate using printing inks with metallic or metal-like pigments become. It has been shown that a metallic or metal-like color has a particularly high contrast and thus produces a particularly pronounced tilting effect, since the incident light is primarily reflected in a specular manner and only to a small extent diffusely reflected. The print or the coating is applied to the substrate, for example, by screen printing, as a silver-colored patch or as a silver-colored film.

Selbstverständlich kann die Beschichtung auch auf das Substrat aufgedampft werden, wobei beispielsweise mittels PVD (physical vapour deposition) oder CVD (chemical vapour deposition) ein metallisches oder metallähnliches Material zunächst verdampft und anschließend auf der Oberfläche des Substrats abgeschieden wird.Of course, the coating can also be vapor-deposited onto the substrate, a metallic or metal-like material first being vaporized by means of PVD (physical vapor deposition) or CVD (chemical vapor deposition) and then being deposited on the surface of the substrate.

Diffuse Reflexion tritt bekanntlich an Grenzflächen mit einer großen Rauheit relativ zur Wellenlänge des einfallenden Lichtes statt. Das einfallende Licht wird nahezu gleichmäßig in alle Raumrichtungen abgestrahlt. Spiegelnde oder gerichtete Reflexion tritt hingegen an ebenen bzw. glatten Oberflächen auf, wobei die Größe des Einfallswinkels gleich der Größe des Ausfallswinkels ist.As is known, diffuse reflection occurs at interfaces with great roughness relative to the wavelength of the incident light. The incident light is emitted almost uniformly in all spatial directions. Specular or directed reflection, on the other hand, occurs on flat or smooth surfaces, the size of the angle of incidence being equal to the size of the angle of reflection.

Das Substrat umfasst vorzugsweise Papier und/oder eine Folie, insbesondere eine transluzente Folie. Im einfachsten Fall besteht das Substrat vollständig entweder aus Papier oder aus Kunststoff. Das Substrat kann jedoch auch bereichsweise aus verschiedenen Materialien bestehen, und insbesondere in einem Bereich aus Papier und zugleich in einem anderen Bereich aus Kunststoff, vorzugsweise aus einer transluzenten Folie, bestehen. Unter transluzenter Folie wird hierbei entweder eine transparente oder eine semitransparente Folie verstanden, beispielsweise eine lasierende Folie, welche beispielsweise Polyamid, Polyester, Polyethylen oder biaxial orientiertes Polypropylen (BOPP) enthält.The substrate preferably comprises paper and / or a film, in particular a translucent film. In the simplest case, the substrate consists entirely of either paper or plastic. However, the substrate can also consist of different materials in some areas, and in particular consist of paper in one area and at the same time consist of plastic in another area, preferably of a translucent film. Translucent film is understood here to mean either a transparent or a semitransparent film, for example a translucent film, which for example Contains polyamide, polyester, polyethylene or biaxially oriented polypropylene (BOPP).

Wertdokumente im Sinne der vorliegenden Erfindung sind insbesondere Banknoten, Aktien, Anleihen, Urkunden, Gutscheine, Schecks, hochwertige Eintrittskarten, aber auch andere fälschungsgefährdete Papiere, wie Pässe oder sonstige Ausweisdokumente, und auch kartenförmige Datenträger, insbesondere Chipkarten, sowie Produktsicherungselemente, wie Etiketten, Siegel, Verpackungen und dergleichen. Der Begriff "Wertdokument" umfasst auch nicht umlauffähige Vorstufen solcher Datenträger, die beispielsweise im Fall von Sicherheitspapier in quasi endloser Form vorliegen und zu einem späteren Zeitpunkt weiterverarbeitet werden.Documents of value in the sense of the present invention are in particular banknotes, shares, bonds, certificates, vouchers, checks, high-quality entry tickets, but also other papers at risk of forgery, such as passports or other identification documents, and also card-shaped data carriers, in particular chip cards, as well as product security elements such as labels, seals , Packaging and the like. The term “document of value” also encompasses non-circulatory preliminary stages of such data carriers which, for example in the case of security paper, are in quasi-endless form and are further processed at a later point in time.

Gemäß einer bevorzugten Ausführungsform werden die Bereiche der Beschichtung mit verminderter Schichtdicke und/oder mit Aussparungen durch einen Laserstrahl erzeugt, wobei die Beschichtung durch den Laserstrahl teilweise und/oder vollständig abgetragen wird. Dies hat den Vorteil, dass das Sicherheitselement nachträglich individualisiert werden kann, d.h. dass Bereiche mit verminderter Schichtdicke und/oder mit Aussparungen nachträglich in die Beschichtung eingebracht werden können.According to a preferred embodiment, the areas of the coating with reduced layer thickness and / or with cutouts are produced by a laser beam, the coating being partially and / or completely removed by the laser beam. This has the advantage that the security element can be individualized subsequently, i.e. that areas with a reduced layer thickness and / or with recesses can be incorporated into the coating afterwards.

Besonders zweckmäßig ist es darüber hinaus, wenn die Bereiche der Beschichtung mit verminderter Schichtdicke und/oder mit Aussparungen alphanummerische Zeichen und/oder graphische Abbildungen darstellen.In addition, it is particularly expedient if the areas of the coating with reduced layer thickness and / or with recesses represent alphanumeric characters and / or graphic images.

In einer speziellen Ausführungsform weist mindestens ein Teil der Oberfläche des Substrats, die mit der Beschichtung versehen ist, eine optisch variable Struktur auf. Hierbei besteht die optisch variable Struktur aus einer Prägestruktur einer Vielzahl von linienförmigen und/oder nicht linienförmigen Prägeelementen. Eine derartige optisch variable Struktur ist aus DE 10 2011 114 644 , DE 10 2011114 647 und DE 10 2011 114 645 bekannt, deren Offenbarungsgehalt diesbezüglich hier voll einbezogen ist, insbesondere die in der obigen Beschreibungseinleitung angegebenen Passagen.In a special embodiment, at least part of the surface of the substrate that is provided with the coating has an optically variable structure. Here, the optically variable structure consists of an embossed structure of a multiplicity of linear and / or non-linear ones Embossing elements. Such an optically variable structure is off DE 10 2011 114 644 , DE 10 2011 114 647 and DE 10 2011 114 645 known, the disclosure content of which is fully included in this regard, in particular the passages given in the introduction to the description above.

Besonders vorteilhaft ist bei dieser Ausführungsform, dass durch die Überlagerung des optisch variablen Effekts dieser Erfindung mit dem optisch variablen Effekt der Prägestrukturen das Auge des Betrachters durch die zusätzliche Information der Prägestrukturen "abgelenkt" wird. Hierdurch ergibt sich ein größerer Blickwinkelbereich, in dem in Auflicht die Beschichtung und die Bereiche mit verminderter Schichtdicke und/oder mit Aussparungen gleich oder nahezu gleich hell erscheinen.It is particularly advantageous in this embodiment that the superimposition of the optically variable effect of this invention with the optically variable effect of the embossed structures "distracts" the viewer's eye by the additional information of the embossed structures. This results in a larger viewing angle range in which the coating and the areas with reduced layer thickness and / or with cutouts appear equally or almost equally bright in incident light.

Anhand der nachfolgenden Beispiele und ergänzenden Figuren werden die Vorteile der Erfindung erläutert. Die beschriebenen Einzelmerkmale und nachfolgend beschriebenen Ausführungsbeispiele sind für sich genommen erfinderisch, aber auch in Kombination erfinderisch. Die Beispiele stellen bevorzugte Ausführungsformen dar, auf die jedoch die Erfindung in keinerlei Weise beschränkt sein soll. Die in den Figuren gezeigten Proportionen entsprechen nicht den in der Realität vorliegenden Verhältnissen und dienen ausschließlich zur Verbesserung der Anschaulichkeit.The advantages of the invention are explained on the basis of the following examples and supplementary figures. The individual features described and the exemplary embodiments described below are inventive in themselves, but also inventive in combination. The examples represent preferred embodiments to which, however, the invention is in no way intended to be restricted. The proportions shown in the figures do not correspond to the conditions present in reality and serve exclusively to improve the clarity.

Im Einzelnen zeigen schematisch:

Fig. 1
ein erfindungsgemäßes Sicherheitselement, wobei einfallendes Licht direkt in das Auge des Betrachters reflektiert wird und hierbei in Fig. 1a das Sicherheitselement in seitlicher Ansicht und in Fig. 1b in Draufsicht,
Fig. 2
ein erfindungsgemäßes Sicherheitselement, wobei einfallendes Licht nicht in das Auge des Betrachters reflektiert wird und hierbei in Fig. 2a das Sicherheitselement in seitlicher Ansicht und in Fig. 2b in Draufsicht,
Fig. 3
ein erfindungsgemäßes Sicherheitselement, wobei einfallendes Licht im Wesentlichen knapp am Auge des Betrachters vorbei reflektiert wird und hierbei in Fig. 3a das Sicherheitselement in seitlicher Ansicht und in Fig. 3b in Draufsicht,
In detail show schematically:
Fig. 1
a security element according to the invention, with incident light being reflected directly into the eye of the beholder and in this case in Fig. 1a the security element in side view and in Figure 1b in plan view,
Fig. 2
a security element according to the invention, with incident light not being reflected into the eye of the beholder and in this case in Fig. 2a the security element in side view and in Figure 2b in plan view,
Fig. 3
a security element according to the invention, with incident light being reflected essentially just past the eye of the beholder and in this case in Fig. 3a the security element in side view and in Figure 3b in plan view,

Fig. 1 zeigt schematisch ein erfindungsgemäßes Sicherheitselement 1, wobei gemäß Fig. 1a die spiegelnd reflektierende Beschichtung des Sicherheitselements den einfallenden Lichtstrahl 2 in den Lichtstrahl 3 spiegelt, wobei der reflektierte Lichtstrahl 3 direkt in das Auge 4 des Betrachters reflektiert wird. Gemäß Fig. 1b erscheint in Auflicht die Beschichtung 5 hell, wohingegen die Bereiche 6 mit verminderter Schichtdicke und/oder mit Aussparungen dunkel erscheinen. Die Bereiche 6 bilden hierbei die alphanummerische Zeichenfolge "12345". Fig. 1 shows schematically a security element 1 according to the invention, wherein according to Fig. 1a the specularly reflective coating of the security element reflects the incident light beam 2 into the light beam 3, the reflected light beam 3 being reflected directly into the eye 4 of the viewer. According to Figure 1b In incident light, the coating 5 appears light, whereas the areas 6 with reduced layer thickness and / or with cutouts appear dark. The areas 6 here form the alphanumeric character sequence "12345".

Wird nun gemäß Fig. 2 bzw. Fig. 2a das Sicherheitselement 1 so weit verkippt, dass die spiegelnd reflektierende Beschichtung das einfallende Licht 2 nicht zum Auge 4 des Betrachters hin reflektiert, erscheint in Auflicht gemäß Fig. 2b die Beschichtung 5 dunkel, wohingegen die Bereiche 6 mit verminderter Schichtdicke und/oder mit Aussparungen hell erscheinen.Is now according to Fig. 2 or. Fig. 2a the security element 1 tilted so far that the specularly reflective coating does not reflect the incident light 2 towards the eye 4 of the viewer, appears in incident light according to Figure 2b the coating 5 is dark, whereas the areas 6 with reduced layer thickness and / or with recesses appear light.

Fig. 3 zeigt in Fig. 3a den Blickwinkelbereich zwischen den beiden Extremfällen der Fig. 1 und Fig. 2, in dem die spiegelnd reflektierende Beschichtung des Sicherheitselements 1 das einfallende Licht 2 im Wesentlichen knapp am Auge 4 des Betrachters vorbei reflektiert. In diesem Fall erscheinen in Auflicht gemäß Fig. 3b die Beschichtung 5 und die Bereiche 6 mit verminderter Schichtdicke und/oder mit Aussparungen gleich oder nahezu gleich hell. Fig. 3 shows in Fig. 3a the viewing angle range between the two extreme cases of FIGS. 1 and 2 , in which the specularly reflective coating of the security element 1 reflects the incident light 2 essentially just past the eye 4 of the viewer. In this case appear in reflected light according to Figure 3b the coating 5 and the areas 6 with reduced layer thickness and / or with recesses equally or almost equally bright.

Claims (8)

  1. Security element (1) for enhancing the protection from forgery of security papers, valuable documents, identity cards, or products of any type, wherein the security element (1)
    a. consists of a substrate, the surface of which diffusely reflects incident light (2), and
    b. consists of a coating (5), which at least partially covers the surface of the substrate, wherein the surface of the coating at least partially reflects incident light (2) like a mirror,
    characterized in that
    the coating (5) has regions (6) having reduced layer thickness and/or having recesses, wherein these regions (6), for an observer
    - at specific observation angles have no or only a minor recognizable contrast and
    - at other observation angles have a clearly recognizable contrast
    in relation to the surrounding regions of the coating (5) without reduced layer thickness or without recesses, wherein
    - the coating (5) appears bright in incident light if the mirrored reflective coating (5) of the security element (1) reflects the incident light (2) directly into the eye (4) of the observer, whereas the regions (6) having reduced layer thickness and/or having recesses appear dark,
    - the coating (5) appears dark in incident light if the mirrored reflective coating (5) does not reflect the incident light (2) to the observer, whereas the regions (6) having reduced layer thickness and/or having recesses appear bright,
    - in a viewing angle range between these two extreme cases, in which the mirrored reflective coating (5) reflects the incident light (2) essentially just past the eye (4) of the observer, the coating (5) and the regions (6) having reduced layer thickness and/or having recesses appear equally or nearly equally bright in incident light.
  2. Security element (1) according to Claim 1, characterized in that the coating (5) has a metallic or metallic reflective surface.
  3. Security element (1) according to Claim 2, characterized in that the coating (5) has a silver, gold, or copper-coloured colour impression.
  4. Security element (1) according to at least one of the preceding claims, characterized in that the regions (6) of the coating (5) having reduced layer thickness and/or having recesses represent alphanumeric characters and/or graphic images.
  5. Security element (1) according to at least one of the preceding claims, characterized in that at least a part of the surface of the substrate, which is provided with the coating (5), has an optically variable structure, wherein the optically variable structure consists of an embossed structure of a plurality of linear and/or nonlinear embossed elements.
  6. Method for producing a security element (1) for enhancing the protection from forgery of security papers, valuable documents, identity cards, or products of any type, wherein
    a. a substrate is provided, the surface of which diffusely reflects incident light (2), and
    b. a coating (5) is applied to the substrate, which at least partially covers the surface of the substrate, wherein the surface of the coating (5) at least partially reflects incident light (2) like a mirror,
    characterized in that
    the coating (5) is partially or completely removed in regions, so that regions (6) of the coating (5) having reduced layer thickness and/or having recesses are created and these regions (6), for an observer
    - at specific observation angles have no or only a minor recognizable contrast and
    - at other observation angles have a clearly recognizable contrast
    in relation to the surrounding regions of the coating (5) without reduced layer thickness or without recesses, wherein
    - the coating (5) appears bright in incident light if the mirrored reflective coating (5) of the security element (1) reflects the incident light (2) directly into the eye (4) of the observer, whereas the regions (6) having reduced layer thickness and/or having recesses appear dark,
    - the coating (5) appears dark in incident light if the mirrored reflective coating (5) does not reflect the incident light (2) to the observer, whereas the regions (6) having reduced layer thickness and/or having recesses appear bright,
    - in a viewing angle range between these two extreme cases, in which the mirrored reflective coating (5) reflects the incident light (2) essentially just past the eye (4) of the observer, the coating (5) and the regions (6) having reduced layer thickness and/or having recesses appear equally or nearly equally bright in incident light.
  7. Method according to Claim 6, characterized in that the regions (6) of the coating (5) having reduced layer thickness and/or having recesses are created by a laser beam, wherein the coating is partially and/or completely removed by the laser beam.
  8. Method according to Claim 6 or 7, characterized in that the coating (5) is printed or vapour deposited on the substrate.
EP13005877.9A 2012-12-20 2013-12-17 Safety element with tilting effect Active EP2746059B1 (en)

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Publication number Priority date Publication date Assignee Title
DE4446368A1 (en) * 1994-12-23 1996-06-27 Giesecke & Devrient Gmbh Data carrier with an optically variable element
EA012512B1 (en) * 2004-04-30 2009-10-30 Де Ля Рю Интернэшнл Лимитед A security device and method of manufacturing thereof
EP2441593B1 (en) * 2010-10-13 2020-04-15 Hueck Folien Gesellschaft m.b.H. Security element with achromatic features
DE102011114647A1 (en) 2011-09-30 2013-04-04 Giesecke & Devrient Gmbh Security element with several optically variable structures
DE102011114645A1 (en) 2011-09-30 2013-04-04 Giesecke & Devrient Gmbh Security element with an optically variable structure of micromirrors
DE102011114644A1 (en) 2011-09-30 2013-04-04 Giesecke & Devrient Gmbh Security element with several optically variable structures and a kinematic effect

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