CN109922969B

CN109922969B - Value document

Info

Publication number: CN109922969B
Application number: CN201780069468.8A
Authority: CN
Inventors: B.托伊费尔; G.多尔夫; A.巴尔
Original assignee: Giesecke and Devrient GmbH
Current assignee: Giesecke and Devrient GmbH
Priority date: 2016-12-09
Filing date: 2017-11-29
Publication date: 2021-04-13
Anticipated expiration: 2037-11-29
Also published as: WO2018103882A1; EP3565722A1; CN109922969A; EP3565722B1; DE102016014662A1

Abstract

The invention relates to a value document comprising a value document substrate having a breakthrough region, which has a front side and a rear side, wherein the front side of the value document substrate is provided with a thin-film security element at least in the breakthrough region of the value document substrate; when the rear side of the value document substrate is viewed in reflected light, the value document substrate through-regions can be identified and are formed in the form of a first pattern composed of a first partial region and a second partial region; the thin-film security element has a transparent region which is formed at least in a first partial region of the value document substrate passage region and has a non-transparent region which is arranged so as to overlap a second partial region of the value document substrate passage region; the transparent region of the film security element, which is formed in the first partial region of the transparent region of the value document substrate, can be identified in the form of a second pattern when the front side of the value document substrate is viewed with reflected light; the non-transparent region of the film security element, which is arranged overlapping the second partial region of the through-region of the value document substrate, can be recognized in the form of a third pattern when the front side of the value document substrate is viewed with reflected light, said third pattern exhibiting a visually variable effect when the value document is tilted and being based on a retroreflective embossed structure.

Description

Value document

The invention relates to a value document comprising a value document substrate having a breakthrough region, which has a front side and a rear side, wherein the front side of the value document substrate is provided with a thin-film security element at least in the breakthrough region of the value document substrate; when the rear side of the value document substrate is viewed in reflected light, the value document substrate through-regions can be identified and are formed in the form of a first pattern (Motiv) consisting of a first partial region and a second partial region; the thin-film security element has a transparent region which is formed at least in a first partial region of the value document substrate passage region and has a non-transparent region which is arranged so as to overlap a second partial region of the value document substrate passage region; the transparent region of the film security element, which is formed in the first partial region of the transparent region of the value document substrate, can be identified in the form of a second pattern when the front side of the value document substrate is viewed with reflected light; the non-transparent region of the film security element, which is arranged overlapping the second partial region of the through-region of the value document substrate, can be recognized in the form of a third pattern when the front side of the value document substrate is viewed with reflected light, said third pattern exhibiting a visually variable effect when the value document is tilted and being based on a retroreflective embossed structure.

In the document of value according to the invention, the document of value can be, for example, a banknote or document, but also a stock certificate, a stamp, a ticket, an air ticket, a voucher, a visa sticker or the like as well as a label, a stamp, a packaging or other elements. The simplified designation "value document" therefore always includes documents of the type mentioned below. The term "value document" also includes security paper used for the manufacture of banknotes.

In order to provide security, value documents are usually provided with security elements which enable the authenticity of the value document to be checked and at the same time serve as protection against unauthorized copying of the value document. As security elements, for example, thin-film security elements are conceivable which have a thin-film substrate or a plastic substrate and are applied to the value document substrate by means of an adhesive layer.

In order to increase the security against forgery, it is known to combine these thin-film security elements with through-openings or through-openings in the document of value.

WO 95/10420a1 describes a document of value, in which the carrier is provided with a window-like passage section which is closed by at least one partially transparent covering film, wherein the covering film can be provided with additional security features, such as diffraction structures, in particular in the region of the window-like passage section.

WO 2005/025891 a2 describes a data carrier with a thin-film security element, wherein both the thin-film security element and the data carrier have a penetration region; the penetration regions preferably at least partially overlap and particularly preferably coincide (deckungsgleich). In a further alternative, the breakthrough regions in the data carrier are covered by a further film on the side facing away from the data carrier side with the thin-film security element.

WO 2010/000432 a1 describes a value document with an opening which is closed on one side by a light-transmitting film. In order to increase the security against forgery, both the top and the underside of the document of value are covered by a light-transmitting coating, which is preferably realized over the entire surface. The coatings are preferably extruded or laminated, respectively, independently of one another.

WO 2011/015622 a1 describes a value document having an opening which is closed on one side by an at least partially translucent or transparent film, wherein the value document has a coating on the side opposite the film in the region of the opening and substantially in the region of the film side, wherein the coating is not present or is substantially not present inside the opening.

WO 2014/108329 a1 describes a method for producing a continuous paper web for producing security and value documents. The paper web is first provided with through openings. The film is then applied in register, with the security feature to be applied to the web.

The object of the present invention is to provide a value document comprising a value document substrate having a through-opening, wherein the value document is improved with regard to the verifiability of its authenticity and with regard to the protection against unauthorized copying of the value document.

This object is achieved according to the invention by the combination of features defined in the independent claims. The development is the subject of the dependent claims.

Summary of the invention

(main aspect of the invention) a value document comprising a value document substrate with a breakthrough region, which has a front side and a back side, wherein,

the front side of the value document substrate is provided with a thin-film security element at least in the region of the value document substrate;

the value document substrate through-regions can be identified when the rear side of the value document substrate is viewed in reflected light, and are formed in the form of a first pattern composed of a first partial region and a second partial region;

the thin-film security element has a transparent region which is formed at least in a first partial region of the value document substrate passage region and has a non-transparent region which is arranged so as to overlap a second partial region of the value document substrate passage region;

the transparent regions of the film security element formed in the first partial regions of the through-regions of the value document substrate can be identified in the form of second patterns when the front side of the value document substrate is viewed with reflected light;

the non-transparent region of the film security element, which is arranged overlapping the second partial region of the through-region of the value document substrate, can be recognized in the form of a third pattern when the front side of the value document substrate is viewed with reflected light, said third pattern exhibiting a visually variable effect when the value document is tilted and being based on a retroreflective embossed structure. The embossed structures are in particular diffractive relief structures, micro-optical relief structures or sublambda (sublambda) structures.

(preferred embodiment) the value document according to item 1, wherein the non-transparent region of the film security element which is arranged overlapping the second partial region of the value document substrate through-region is opaque, so that the value document substrate through-region formed in the form of the first pattern can be recognized only when viewing the rear side of the value document substrate and cannot be recognized when viewing the front side of the value document substrate with reflected light or transmitted light.

(preferred embodiment) the value document according to item 1, wherein the non-transparent region of the film security element which is arranged overlapping the second partial region of the value document substrate through-region is translucent, so that the value document substrate through-region formed in the form of the first pattern cannot be recognized when the front side of the value document substrate is viewed in reflected light and can be recognized when the front side of the value document substrate is viewed in transmitted light.

(preferred embodiment) the value document according to one of the items 1 to 3, wherein a portion of the non-transparent region of the film security element which is arranged overlapping with the second partial region of the value document substrate passage region can be identified within the value document substrate passage region when the rear side of the value document substrate is viewed with reflected light.

(preferred embodiment) the value document according to item 4, wherein the part of the non-transparent area of the film security element which is arranged overlapping the second partial area of the value document substrate passage area and which can be identified within the value document substrate passage area when the rear side of the value document substrate is viewed with reflected light exhibits a visually variable effect when the value document is tilted and is based on a retroreflective embossed structure and preferably has a color which is different from the color which can be seen when the front side of the value document substrate is viewed with reflected light.

(preferred embodiment) the value document according to one of the items 1 to 5, wherein,

-the value document substrate has, in addition to the through areas forming the first pattern, further through areas forming a fourth pattern;

the front side of the value document substrate is provided with a film security element at least in the through-regions forming the first pattern and in the through-regions forming the fourth pattern;

-the thin-film security element has a further non-transparent area which is arranged overlapping with a further value document substrate penetration area forming a fourth pattern;

the further non-transparent region of the film security element, which is arranged overlapping a further value document substrate through-region forming the fourth pattern, can be recognized in the form of a fifth pattern when the front side of the value document substrate is viewed with reflected light, which fifth pattern exhibits a visually variable effect when the value document is tilted and is based on a retroreflective embossed structure.

(preferred embodiment) the value document according to item 6, wherein a portion of the further non-transparent area of the film security element which is arranged overlapping the further value document substrate breakthrough area can be identified inside the further value document substrate breakthrough area when the back side of the value document substrate is viewed with reflected light.

(preferred embodiment) the value document according to item 7, wherein the part of the further non-transparent area of the film security element which is arranged overlapping the further value document substrate breakthrough area and which can be identified inside the further value document substrate breakthrough area when the back side of the value document substrate is viewed with reflected light exhibits a visually variable effect when the value document is tilted and is based on a retroreflective embossed structure and preferably has a color which is different from the color which can be seen when the front side of the value document substrate is viewed with reflected light.

(preferred embodiment) the value document according to one of the items 1 to 8, wherein the light-reflecting embossed structure of the non-transparent area of the film security element arranged overlapping the second partial area of the value document substrate breakthrough area and/or the light-reflecting embossed structure of the further non-transparent area of the film security element arranged overlapping the further value document substrate breakthrough area is obtained as follows:

(a) the reflective diffractive structures or (b) the reflective microstructures are composed of a plurality of reflective mosaic elements in the form of a mosaic, which are characterized by the parameters size, contour shape, relief shape, reflectivity and spatial orientation and form a predetermined pattern in such a way that different groups of mosaic elements having different characterizing parameters reflect incident light rays into different spatial regions, and wherein the mosaic elements have a lateral dimension which is smaller than the eye resolution limit.

(preferred embodiments) a value document according to one of the items 1 to 9, wherein the light-reflecting embossed structures of the non-transparent regions of the film security element which are arranged overlapping the second partial region of the value document substrate passage region and/or the light-reflecting embossed structures of the further non-transparent regions of the film security element which are arranged overlapping the further value document substrate passage region, (i) an opaque metal layer as a light-reflecting layer, or (ii) a transparent, highly refractive layer as a light-reflecting layer, or (iii) a lamellar element with a color gradient effect as a light-reflecting layer, in particular a layer with a light-reflecting layer and a translucent layer and a dielectric layer arranged therebetween, or (iv) a layer made of a liquid crystal material, in particular of a cholesteric liquid crystal material, as a light-reflecting layer, or (v) a printed layer based on effect pigment components as a light-reflecting layer, the effect pigment component has an effect depending on the viewing angle or has a different color when viewed with reflected light and when viewed with transmitted light, or (vi) has the following multilayer structure as a light-reflecting layer: two translucent layers and a dielectric layer arranged between the two translucent layers, wherein the multilayer structure has a different hue when viewed with reflected light and when viewed with transmitted light.

(preferred embodiment) the value document according to one of the items 1 to 10, wherein the value document substrate is a paper substrate.

(preferred embodiment) the value document according to one of the items 1 to 11, wherein the value document substrate through-regions forming the first pattern and/or the value document substrate through-regions forming the fourth pattern are obtainable by the action of laser radiation on the data carrier substrate, in particular by means of laser cutting.

(preferred embodiment) the value document according to one of the items 1 to 12, wherein the thin-film security element is a security strip.

(preferred embodiment) the value document according to one of the items 1 to 13, wherein the value document is a banknote.

Detailed Description

According to the invention, the value document is illuminated from one side and viewed from the same side, viewed with reflected light. Thus, for example, when the front side of the document of value is illuminated and also viewed, it is viewed with reflected light.

According to the invention, the document of value is illuminated from one side and the security element is viewed from the other side, in particular the opposite side, as viewed in transmitted light. Thus, for example, the rear side of the document of value is illuminated and the front side of the document of value is viewed with transmitted light. Thus, the light shines through the value document.

The value document mentioned in this description may for example refer to a banknote, in particular a paper banknote, a polymer banknote or a film composite banknote, to a stock certificate, a bond, a certificate, a coupon, a check, a high value admission ticket, but also to a personal page of a certificate, an identity card or a passport.

The thin-film security element mentioned in the present description may for example refer to a patch or a label, may refer to a (continuous) strip or a (continuous) line.

The value document substrate is in particular a paper substrate or a paper-like substrate.

According to the invention, the through-regions of the document of value substrate are formed by cutouts that penetrate the document of value substrate, said cutouts forming the through-region pattern. Preferably, the penetrating cutouts forming the penetrating region pattern in the value document substrate are produced by the action of laser radiation on the value document substrate, in particular by means of laser cutting. Smooth edges can be produced by means of laser cutting. In addition, very fine patterns of the penetration regions can be produced by means of the laser radiation. The through-region pattern can also be formed by a plurality of cutouts which penetrate through the value document substrate and which together produce the pattern.

It is known from WO 95/10420a1 to provide a document of value substrate with a window-like passage section which is closed by an at least partially transparent covering film, wherein the covering film can be provided with additional security features, such as diffraction structures, in particular in the region of the window-like passage section. In contrast, the idea on which the invention is based is the recognition that surprisingly higher-order patterns can be produced when viewing a value document alternately from the front and from the back by means of a through-area and a thin-film security element covering the through-area, which has transparent areas and non-transparent areas exhibiting a visually variable effect and which are based on a light-reflecting embossed structure. The value document substrate-through region forms a first pattern with a transparent window region and a metallization structure, which first pattern is recognizable when the rear side of the value document is viewed with reflected light, but is not perceptible by an observer when the front side of the value document is viewed with reflected light. When viewing the front side of the document of value with reflected light, the viewer sees a second pattern in the form of a transparent window region and a third pattern adjoining it in the form of a light-reflecting embossed structure exhibiting a visually variable effect. The first pattern, which is recognizable to the observer when switching from a front view of the value document with reflected light to a rear view of the value document, is surprising for the observer, since it is a high-grade pattern composed of two components, wherein the first component is a second pattern, which is recognizable even when viewed from the front with reflected light, in the form of a transparent window region, and the second component is a region of the thin-film security element covering the breakthrough region, which is recognizable when viewed from the front with reflected light, is non-transparent, exhibits a visually variable effect, and is based on a retroreflective print.

The embossing structures that can be used according to the invention are in particular pressed into an embossing lacquer. Within the scope of the present invention, the expression "visually variable effect" also includes, in addition to holograms, diffractive structures which are similar to holograms, i.e. structures which do not produce a defined image but rather a blurred, colored impression, for example. The expression "visually variable effects" likewise includes diffraction patterns, structures with color gradient effects, kinoform (kinoform), structures with microlens effects, structures with isotropic or anisotropic scattering effects or with other interference effects, subwavelength structures, moth-eye structures, microstructures and microlens structures for molar amplifiers or mode mappers (Modulo Mapper), micro-mirror structures and micro-prism structures.

Preferred retroreflective embossed structures, for example, comprise an interference-capable multilayer structure having

A light-reflective layer (in particular of metal);

a translucent (specular) layer (selected in particular in the group consisting of Al, Ag, Ni, Cr, Cu, Au and alloys of one or more of the foregoing elements); and

a dielectric layer arranged between the light-reflecting layer and the translucent (mirror) layer,

wherein the color of the multilayer structure changes with a change in viewing angle.

The first appearance of the interference-capable multilayer structure, which is recognizable when the front side is viewed by reflected light, and the second appearance of the interference-capable multilayer structure, which is recognizable when the front side is viewed by transmitted light, can be produced, for example, by recesses in the light-reflecting layer and/or the translucent layer. Such thin-film security elements with different reflected/transmitted light appearances are known from WO 2009/149831 a 2. The translucent layer may for example have a plurality of grid-like arranged interspaces which form integrally a symbol, an image or a pattern. The pattern produced in this way is visible in reflected light and disappears in transmitted light. Alternatively and/or additionally, the different reflected/transmitted light appearances of the multilayer structure may be achieved by combining said structure with a relief structure, in particular a diffractive relief structure, a micro-optical relief structure or a sub- λ structure.

Other preferred retroreflective embossed structures comprise, for example, a multilayer structure having two translucent layers and a dielectric layer arranged between the two translucent layers, wherein the multilayer structure has a different hue when viewed with reflected light and when viewed with transmitted light, in particular a gold coloration when viewed with reflected light and a blue hue when viewed with transmitted light. The two different hues are in particular complementary colors. Such a multilayer structure is based in particular on two semi-transparent mirror layers and a dielectric layer arranged between the two semi-transparent mirror layers. Such multilayer structures which appear golden when viewed with reflected light and blue hues when viewed with transmitted light are known, for example, from WO 2011/082761 a 1. Suitable for use as the semi-transparent mirror layer are in particular metals selected from the group consisting of Al, Ag, Ni, Cr, Cu, Au and alloys of one or more of the aforementioned elements, wherein Al or Ag is preferred as the semi-transparent mirror layer and Al is particularly preferred. A suitable multilayer structure with two semi-transparent mirror layers and a dielectric layer arranged between the semi-transparent mirror layers preferably has the following objective properties:

the two semi-transparent mirror layers are preferably selected from Al or Ag; dielectric layer, especially SiO₂A layer;

in the case of two translucent mirror layers each based on Al, the respective preferred layer thickness is in the range from 5nm to 20nm, particularly preferably in the range from 10nm to 14 nm; dielectric SiO₂The layer preferably has a layer thickness in the range from 50nm to 450nm, further preferably in the range from 80nm to 260nm, wherein the ranges from 80nm to 100nm and from 220nm to 240nm are particularly preferred for providing a gold/blue conversion;

in the case where each of the two translucent mirror layers is based on Ag, the respective preferred layer thickness is in the range of 15nm to 25 nm;dielectric SiO₂The layer preferably has a layer thickness in the range from 50nm to 450nm, further preferably in the range from 80nm to 260nm, wherein the ranges from 80nm to 100nm and 220nm to 240nm are particularly preferred for providing a gold/blue conversion.

The multilayer structure not only enables the production of translucent functional layers which appear golden when viewed in reflected light and blue when viewed in transmitted light, but also enables other color changes to be produced as a function of the choice of, in particular, the layer thickness of the dielectric layer, for example

Magenta in reflected light and cyan in transmitted light;

-a turquoise colour in reflected light and an orange colour in transmitted light;

-gold in reflected light and blue-violet in transmitted light;

silver in reflected light and purple in transmitted light.

Other preferred retroreflective embossed structures include, for example, a liquid crystal layer that exhibits a different color when viewed with reflected light than when viewed with transmitted light. Alternatively and/or additionally, the different reflected/transmitted light appearances may be achieved by combining the liquid crystal layer with a relief structure, in particular a diffractive relief structure, a micro-optical relief structure or a sub- λ structure.

Other preferred retroreflective embossing structures comprise, for example, a printed layer with an effect pigment component which, when viewed with reflected light, exhibits a different color than when viewed with transmitted light, in particular a gold/blue, gold/violet, green-gold/magenta, violet/green or silver/opaque color shift. These process colors are described, for example, in WO 2011/064162A 2. Alternatively and/or additionally, the different reflected/transmitted light appearances may be achieved by combining the printed layer with a relief structure, in particular a diffractive relief structure, a micro-optical relief structure or a sub- λ structure.

The relief structure forming the diffractive structure is in particular a holographic structure. The dimensions of the structural elements of the diffractive structure are preferably in the order of the wavelength of light, more preferably in the range of more than 100nm and less than 1 μm, with a range of more than 300nm and less than 1 μm being particularly preferred.

The relief structures forming the micro-mirror structures are also referred to herein as micro-optical relief structures. The manufacture of micro-optical relief structures is known in the art (see for example WO 2014/060089 a 2). The dimensions of the structural elements of the micro-mirror structure are preferably in the range of more than 1 μm and less than 40 μm, wherein the range of more than 1 μm and less than 30 μm is particularly preferred. The dimensions of the structural elements of the micromirror structure have, for example, a height of not more than 15 μm and a lateral extension of not more than 30 μm. The height and lateral extent of the structural elements of the micromirror structure are preferably greater than 1 μm.

Other preferred micro-optical relief structures are known, for example, from WO 2007/079857 a 1. The reflective microstructure has a mosaic shape consisting of a plurality of reflective mosaic elements, which are characterized by the parameters size, contour shape, relief shape, reflectivity and spatial orientation and form a predetermined pattern in such a way that different groups of mosaic elements having different characterizing parameters reflect incident light rays into different spatial regions, and the mosaic elements have a lateral dimension which is less than the eye resolution limit.

Further embodiments and advantages of the invention are explained below on the basis of the schematically strongly simplified drawing, which is not represented in size and scale in the view of the drawing to improve the intuitiveness. In the drawings:

fig. 1 shows a value document according to the invention according to a first embodiment;

fig. 2a shows the front side of a paper substrate of a value document according to a first embodiment;

fig. 2b shows the back of the paper substrate of the value document according to the first embodiment;

FIG. 3 shows the appearance of the front side of a thin-film security element before application to a paper substrate;

fig. 4 shows the appearance of the front side of a value document viewed in reflected light in the region of a thin-film security element applied to the front side of a paper substrate;

fig. 5 shows the appearance of the rear side of the value document viewed with reflected light in the region of the thin-film security element, i.e. on the side facing away from the thin-film security element;

fig. 6 shows the appearance of the front side of a value document viewed in transmitted light in the region of a thin-film security element applied to the front side of a paper substrate;

fig. 7 to 15 show an example for producing a thin-film security element; and is

Fig. 16 to 22 show a further example for producing a thin-film security element.

First embodiment

Fig. 1 shows the front side of a value document 1 according to the invention, in this case a banknote, according to a first embodiment. The bank note 1 is based on a paper substrate 2, which is provided with a strip-shaped, thin-film security element 3 on its front side. The thin-film security element 3 has a width of 1.4cm and a length of 7.5cm in the present exemplary embodiment.

Fig. 2a shows the front side of a paper substrate 2 of a value document 1 according to the invention in a state before the film security element 3 is glued to the paper. The paper substrate 2 has two

passage areas

4 and 5 produced by laser cutting in the paper area to which the film security element 3 is to be applied, wherein the passage areas 4 are formed in the form of fish and the passage areas 5 are formed in the form of stars. The process of producing through-regions in a paper substrate by means of the action of laser radiation, in particular by laser cutting, is described, for example, in WO 2010/072329 a1 and WO 2011/154112 a 1.

Fig. 2b shows the rear side of the paper substrate 2, which has the penetration regions 4 and 5 (in the state before the film security element 3 is applied to the front side of the paper substrate 2) produced by means of laser cutting.

Fig. 3 shows the appearance of the front side of the thin-film security element 3 before application to the paper substrate 2 shown in fig. 2a with the through-regions 4 and 5 (the imaginary dashed line a-a' for the following description of the thin-film security element in fig. 7-15 and 16-22The manufacturing method of the piece 3 is important). The thin-film security element 3 has the shape of a security strip and is based on a transparent plastic substrate (for example polyethylene terephthalate). The back surface of the plastic substrate has an adhesive layer, and the thin-film forgery-preventing element 3 can be adhered to the paper substrate via the adhesive layer. The front side of the plastic substrate has a UV lacquer which has a diffractive relief structure in the

regions

6 and 8, respectively, and a micro-optical relief structure in the region 7. The

diffractive relief structures

6 and 8 formed in the UV lacquer are provided with a light-reflecting metallized structure, i.e. an aluminum layer, and each form a metallic silver-colored, visually variable hologram. The micro-optical relief structure 7 formed in the UV lacquer is provided with a translucent multilayer structure having two translucent layers (respectively aluminum layers) and a dielectric layer (SiO) arranged between the two translucent layers₂Layer), wherein the multilayer structure has a different hue when viewed with reflected light and when viewed with transmitted light. In the described embodiment, a multilayer Al/SiO₂the/Al structure appeared golden when viewed with reflected light and blue when viewed with transmitted light. Such a multilayer structure is known, for example, from WO 2011/082761 a 1. The regions 7 appear to the observer in the form of metallic gold, visually variable microstructured patterns when viewed with reflected light. Such optically variable microstructures are known, for example, from WO 2007/079851 a 1.

The film security element 3 is additionally printed on its front side in the region of the left-hand center with a black printing color in the form of three small rings 9.

The

regions

6, 7, 8 and 9 of the film security element 3 are opaque. Outside the

regions

6, 7, 8 and 9, the thin-film security element 3 is transparent.

The thin-film security element 3 shown in fig. 3 is applied to the paper substrate 2 shown in fig. 2a, which has the

perforation regions

4, 5, by means of an adhesive layer arranged on the rear side of the plastic substrate of the thin-film security element, in such a way that the perforation regions 5 of the paper substrate 2 are completely covered by the non-transparent regions 8 of the thin-film security element 3 and the perforation regions 4 of the paper substrate 2 are only partially covered by the

non-transparent regions

7 and 9 of the thin-film security element 3.

Fig. 4 shows the appearance in the region of the thin-film security element 3 applied to the front side of the paper substrate 2 when the front side of the value document 1 is viewed with reflected light.

The semicircular oval region 10 forms a transparent window in the interior of the value document 1, through which a viewer can see through the value document. In addition, the observer sees the metallic silver-colored, visually

variable holograms

6 and 8 and the metallic gold-colored, visually variable microstructure pattern 7 in the shape of a shell. In the lower left area of the shell 7, the observer graphically views the transparent window 10 together with the black small ring 9 as the configuration of the fish head, the fish body being hidden behind the shell 7 and the air bubbles 9 being generated.

The opaque white area of the paper substrate 2 is denoted by reference numeral 11.

Fig. 5 shows the appearance of the rear side of the value document 1 (in the region of the thin-film security element 3 applied to the front side of the paper substrate 2) when viewed with reflected light.

The opaque white areas of the paper substrate 2 are indicated by reference numeral 12. In the region 13, the observer sees a metallic silver, visually variable, star-shaped hologram. In region 14, the viewer sees a metallic gold, visually variable microstructure pattern, graphically in the shape of a fish. The semicircular oval region 15 forms a transparent window in the interior of the value document 1, through which the observer can see through the value document. The transparent window 15 is seen graphically by the viewer as a fish head shape, wherein the fish body is formed by metallic gold, visually variable microstructures 14.

Fig. 4 shows the appearance of the front side of the document of value 1, which is provided with the film security element 3, when viewed with reflected light, and fig. 5 shows the appearance of the rear side of the document of value 1 when viewed with reflected light, the front side and the rear side of the document of value 1 each having a pattern, which patterns together form a surprisingly high-grade pattern:

the penetrating region 4 shaped as a fish produced in the paper is provided as a first pattern with a first partial region (head) and a second partial region (body);

the first partial region (head) of the first pattern (fish) is transparent due to the transparency in the region of the thin-film security element 3 which covers the first partial region;

the second partial region (body) of the first pattern (fish) is metallic gold due to the non-transparent metallic gold-colored region 7 of the thin-film security element 3 covering the second partial region;

thus, when changing from viewing the front side (fig. 4) to the back side (fig. 5) of the value document 1 with reflected light, the viewer sees the fish-shaped "first pattern" (

reference numerals

14, 15 in fig. 5) as a high-level pattern; the low-level pattern is, on the one hand, a fish-head-shaped transparent window (reference numeral 10 in fig. 4) recognizable in a front plan view as a "second pattern", and a shell-shaped metallic gold-colored microstructure (reference numeral 7 in fig. 4) recognizable in a front plan view as a "third pattern".

Fig. 6 shows the appearance in the region of the thin-film security element 3 applied to the front side of the paper substrate 2 when the front side of the value document 1 is viewed in transmitted light. In contrast to the observation with reflected light (see fig. 4), the observer now additionally sees the region 16, which is shaped like a blue fish body. The blue, translucent fish body 16 forms together with the transparent window 10 shaped as a fish head a fish as a high-grade image which can be recognized in a striking manner when the front side of the value document 1 is viewed in transmitted light.

The exemplary embodiments shown in fig. 1 to 6 are therefore surprising in two respects for the observer, since, on the one hand, a striking, fish-shaped high-grade pattern can be recognized when the value document is switched from a front-side top view to a rear-side top view, and, on the other hand, a striking, fish-shaped high-grade pattern can be recognized when the value document is switched from a front-side top view to a front-side transmission view.

Fig. 7 to 15 illustrate a first example for producing the thin-film security element 3 shown in fig. 3, which is suitable for affixing to a paper substrate of a document of value. Fig. 7 to 15 each show a cross-sectional view along the dashed line a-a' of the layer structure during the formation of the thin-film security element 3 shown in fig. 3. Such a production method is known from WO 2016/091381 a 1.

According to fig. 7, a carrier 17 in the form of a (e.g. transparent) plastic film, for example a PET film, is provided with an embossing lacquer 18. The relief structure (i.e. the surface) of the embossing lacquer 18 has a microstructure (or microstructure) in the partial regions 18a and a nanostructure in the partial regions 18 b.

According to fig. 8, the soluble washable pigment 19 is printed in such a way that the areas of the relief structure 18b forming the diffractive structure form recesses in the applied washable pigment 19.

According to fig. 9, the metallization layer 20, in the present exemplary embodiment aluminum, is applied over the entire surface by means of evaporation to form a layer structure provided with washable pigments 19. The metallization layer 20 is adapted to the diffractive relief structure of the embossing lacquer layer 18 in the partial regions 18 b.

According to fig. 10, a demetallization step is carried out, in which the printed washable pigment region 19 is washed away together with the region of the metallization layer 20 lying above the washable pigment region. The light-reflecting layer 20 remains in the regions of the embossing lacquer layer 18 in which the diffractive relief structures 18b are formed.

According to fig. 11, the soluble washable pigment 22 is printed in such a way that the areas of the relief structure 18a forming the micro-mirror structure form recesses in the applied washable pigment 21.

According to FIG. 12, the entire surface of the layer structure provided with washable pigments 21 is provided with a translucent multilayer structure 22 which appears golden when viewed with reflected light and blue when viewed with transmitted light. This multilayer structure 22 has a translucent aluminum layer 23 with a layer thickness of, for example, 14nm, a dielectric spacer layer 24 (SiO with a layer thickness of, for example, 230 nm)₂) And a translucent aluminum layer 25 with a layer thickness of, for example, 14nm and can be produced by means of evaporation. Such multilayer structures which appear golden when viewed with reflected light and blue hues when viewed with transmitted light are known, for example, from WO 2011/082761 a 1.

According to fig. 13, a demetallization step is carried out, in which the printed washable pigment areas 21 are washed away together with the areas of the multilayer structure 22 lying above the washable pigment areas.

According to fig. 14, the resulting layer structure is provided with an (e.g. transparent) intermediate layer or primer layer 26 (e.g. UV lacquer) and then, according to fig. 15, with a thermocompression bonding lacquer 27 suitable for bonding the security element to the value document substrate.

The embossing lacquer 18 thus formed has a metallic gold micro-mirror pattern in the partial region 18a and a silver-colored holographic pattern in the partial region 18b when the security element is viewed with reflected light from the carrier 17 side.

Fig. 16 to 22 illustrate a second example for producing the thin-film security element 3 shown in fig. 3, which is suitable for affixing to a paper substrate of a document of value. Fig. 16 to 22 each show a cross-sectional view along the dashed line a-a' of the layer structure during the formation of the thin-film security element 3 shown in fig. 3.

According to fig. 16, a carrier 28 in the form of, for example, a transparent plastic film, for example, a PET film, is provided with an embossing lacquer 29. The relief structure (i.e. the surface) of the embossing lacquer 29 has a microstructure in the partial regions 29a and a nanostructure in the partial regions 29 b.

According to fig. 17, a printing layer 30 is first applied to the embossing lacquer 29 by means of washable pigments (i.e. printing pigments which can be washed off or removed by means of a washing liquid after application thereof). Washable pigments are known, for example, from the prior art cited in patent document EP 1972462A 2 and in paragraphs [0004] to [0006] of said patent document.

According to FIG. 18, an embossing lacquer 29 printed with washable pigments 30 is provided over the entire surface with a multilayer structure 31 which appears golden when viewed with reflected light and blue when viewed with transmitted light. This multilayer structure 31 has a translucent aluminum layer with a layer thickness of, for example, 14nm, a dielectric spacer layer (SiO with a layer thickness of, for example, 230 nm)₂) And a translucent aluminum layer with a layer thickness of, for example, 14nm and can be produced by means of evaporation.

According to fig. 19, a demetallization step is carried out, in which the printed washable pigment areas 30 are washed away together with the areas of the multilayer structure 31 lying above the washable pigment areas. The embossing lacquer 29 thus formed has a translucent multilayer structure only in the partial regions 29a, which appears golden when viewed with reflected light and blue in hue when viewed with transmitted light.

According to fig. 20, the embossing lacquer 29 is printed in the partial region 29b with a printing colour known from WO 2005/051675 a 2. The printing pigments are based on flake-form metallic pigments (in particular Al pigments) and lead to the production of a light-reflecting layer 32, in the present example a "silver" mirror layer.

According to fig. 21, the resulting layer structure is provided with a transparent intermediate layer or primer layer 33 (e.g. a transparent UV lacquer).

Finally, the finished thin-film security element 3 is produced according to fig. 22 by applying a transparent adhesive layer 34 (for example, a hot-pressing adhesive) to the primer layer 33.

Second embodiment

The document of value according to the invention according to the second embodiment is similar to the preceding embodiments. However, the region of the thin-film security element 3, which is designated by reference numeral 7 in fig. 3, is designed such that, instead of a translucent multilayer structure which appears golden when viewed with reflected light and blue tinge when viewed with transmitted light, an interferential, opaque multilayer structure is used which has a light-reflecting layer, a translucent layer and a dielectric layer arranged between the light-reflecting layer and the translucent layer, wherein the color of the multilayer structure changes with a change in the viewing angle.

Since the film security element 3 is opaque in the region 7, the value document 1 is visible to the observer when the front side is viewed with transmitted light exactly as it is when the front side is viewed with reflected light. In other words, the appearance of the value document when the front is viewed with transmitted light (in which the transparent regions 16 are visible) shown in fig. 6 of the first embodiment does not apply. Instead, the appearance of the value document when the front face is viewed with transmitted light coincides with the appearance of the value document when the front face is viewed with reflected light (see fig. 4).

The region of the thin-film security element 3, which is denoted by reference numeral 7 in fig. 3, is provided with an interferential, opaque multilayer structure having a light-reflecting layer, a translucent layer and a dielectric layer arranged between the light-reflecting layer and the translucent layer, so that the color of the multilayer structure changes as the viewing angle changes, wherein the region of the thin-film security element 3, which is denoted by reference numeral 7 in fig. 3, can be provided as follows:

variant 1:

in fig. 12, a multi-layer lamellar element 22 with a color gradient effect is associated over the entire surface of the layer structure provided with washable paint 21, analogously to the description above with respect to fig. 7 to 15. Such a thin-layer element 22 has a translucent absorption layer 23 (e.g. Cr), a dielectric spacer layer 24 (e.g. SiO)₂) And a light-reflecting layer 25 (e.g., Al) and may be produced by evaporation.

Variant 2:

in fig. 18, a multi-layer lamellar element 31 with a color gradient effect is provided over the entire surface of the embossing lacquer 29 printed with washable paint 30, similarly to the above description with respect to fig. 16 to 22. Such a thin-layer element 31 has a translucent absorption layer (e.g. Cr), a dielectric spacer layer (e.g. SiO)₂) And a light-reflecting layer (e.g., Al) and may be produced by evaporation.

Claims

1. A value document comprising a value document substrate with a breakthrough region, which has a front side and a back side, wherein,

the non-transparent region of the film security element, which is arranged overlapping the second partial region of the through-opening region of the value document substrate, can be recognized in the form of a third pattern when the front side of the value document substrate is viewed with reflected light, said third pattern exhibiting a visually variable effect when the value document is tilted and being based on a retroreflective embossed structure,

the film security element is characterized in that a part of the non-transparent region of the film security element which is arranged overlapping a second partial region of the value document substrate transmission region can be identified within the value document substrate transmission region when the rear side of the value document substrate is viewed in reflected light.

2. A value document according to claim 1, wherein the non-transparent region of the film security element which is arranged overlapping the second partial region of the value document substrate passage region is opaque, so that the value document substrate passage region formed in the form of the first pattern can be recognized only when viewing the rear side of the value document substrate and cannot be recognized when viewing the front side of the value document substrate with reflected light or transmitted light.

3. A value document according to claim 1, wherein the non-transparent region of the film security element which is arranged overlapping the second partial region of the value document substrate passage region is translucent, so that the value document substrate passage region formed in the form of the first pattern cannot be recognized when the front side of the value document substrate is viewed in reflected light and can be recognized when the front side of the value document substrate is viewed in transmitted light.

4. A value document according to claim 1, wherein the part of the non-transparent region of the film security element which is arranged overlapping the second partial region of the value document substrate passage region and which can be identified within the value document substrate passage region when the rear side of the value document substrate is viewed with reflected light exhibits a visually variable effect when the value document is tilted and is based on a retroreflective embossed structure and has a color which is different from the color which can be seen when the front side of the value document substrate is viewed with reflected light.

5. A value document according to claim 1,

6. A value document according to claim 5, wherein a part of the further non-transparent region of the film security element which is arranged overlapping the further value document substrate through-region can be identified within the further value document substrate through-region when the rear side of the value document substrate is viewed with reflected light.

7. A value document according to claim 6, wherein the part of the further non-transparent region of the film security element which is arranged overlapping the further value document substrate breakthrough region and which can be identified within the further value document substrate breakthrough region when the rear side of the value document substrate is viewed with reflected light exhibits a visually variable effect and is based on a retroreflective embossed structure when the value document is tilted and has a color which is different from the color which can be seen when the front side of the value document substrate is viewed with reflected light.

8. A document of value according to claim 1, wherein the light-reflecting embossed structure of the non-transparent region of the film security element arranged overlapping the second partial region of the document of value substrate breakthrough region and/or the light-reflecting embossed structure of the further non-transparent region of the film security element arranged overlapping the further document of value substrate breakthrough region is obtained as follows:

(a) the reflective diffractive structure or (b) the reflective microstructure is composed of a plurality of reflective mosaic elements in the form of a mosaic, which are characterized by the parameters size, contour shape, relief shape, reflectivity and spatial orientation and form a predetermined pattern in such a way that different groups of mosaic elements with different characterizing parameters reflect incident light rays into different spatial regions, and wherein the mosaic elements have a lateral dimension which is smaller than the eye resolution limit.

9. A document of value according to claim 1, wherein the light-reflecting embossed structures of the non-transparent regions of the film security element which are arranged overlapping the second partial region of the document of value substrate passage area and/or the light-reflecting embossed structures of the further non-transparent regions of the film security element which are arranged overlapping the further document of value substrate passage area (i) have an opaque metal layer as a light-reflecting layer, or (ii) have a transparent refractive layer as a light-reflecting layer, or (iii) have a lamellar element with a color-gradient effect as a light-reflecting layer, or (iv) have a layer made of liquid-crystalline material as a light-reflecting layer, or (v) have a printed layer based on effect pigment components as a light-reflecting layer, said effect pigment components having an effect which depends on the viewing angle or having different colors when viewed with reflected light and when viewed with transmitted light, or (vi) has the following multilayer structure as a light reflecting layer: two translucent layers and a dielectric layer arranged between the two translucent layers, wherein the multilayer structure has a different hue when viewed with reflected light and when viewed with transmitted light.

10. A value document according to claim 9, wherein the lamellar elements have a light-reflecting layer and a translucent layer with a dielectric layer arranged therebetween.

11. The value document of claim 1, wherein the value document substrate is a paper substrate.

12. A value document according to claim 1, wherein the value document substrate penetration region forming the first pattern is obtainable by the action of laser radiation on the data carrier substrate.

13. A value document according to claim 5, wherein the value document substrate penetration area forming the fourth pattern is obtainable by the action of laser radiation on the data carrier substrate.

14. A value document according to claim 1, wherein the thin-film security element is a security strip.

15. A value document according to claim 1, wherein the value document is a banknote.