EP3609717B1 - Élément de sécurité comportant une zone caractéristique colorée - Google Patents

Élément de sécurité comportant une zone caractéristique colorée Download PDF

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Publication number
EP3609717B1
EP3609717B1 EP18720512.5A EP18720512A EP3609717B1 EP 3609717 B1 EP3609717 B1 EP 3609717B1 EP 18720512 A EP18720512 A EP 18720512A EP 3609717 B1 EP3609717 B1 EP 3609717B1
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EP
European Patent Office
Prior art keywords
security element
relief
effect pigments
element according
platelet
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
EP18720512.5A
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German (de)
English (en)
Other versions
EP3609717A1 (fr
Inventor
Patrick Renner
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
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Giesecke and Devrient Currency Technology GmbH
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Publication of EP3609717A1 publication Critical patent/EP3609717A1/fr
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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
    • B42D25/324—Reliefs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms
    • 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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks

Definitions

  • the invention relates to a security element for securing security papers, documents of value and other data carriers, which has a colored feature area.
  • the invention also relates to a method for producing such a security element and a correspondingly equipped data carrier.
  • Data carriers such as value or identity documents, but also other objects of value such as branded items, are often provided with security elements for protection that allow the authenticity of the data carrier to be checked and at the same time serve as protection against unauthorized reproduction.
  • security elements for protection that allow the authenticity of the data carrier to be checked and at the same time serve as protection against unauthorized reproduction.
  • DE 10 2014 018 204 A1 uses platelet-shaped metal pigments that adapt to a relief structure as a reflective layer.
  • the metal pigments are initially mixed with a dye, the dye forming a layer over the reflective layer.
  • EP 2 538 247 A2 shows a multicolored color tilt security element with an absorber-dielectric-absorber structure, the dielectric being vapor-deposited in locally different thicknesses and an absorber layer having a microstructure.
  • DE 10 2015 010 744 A1 shows the preamble of claim 1.
  • the invention is based on the object of specifying a security element of the type mentioned at the beginning with an attractive visual appearance.
  • the two sub-areas mentioned and possibly further sub-areas of the feature area are advantageously designed in the form of patterns, characters or codes.
  • the two sub-areas can already produce different visual appearances even when viewed.
  • the relief structures are designed in a first partial area in the form of holographic structures and in a second partial area in the form of small micromirrors and generate a holographic representation in the first partial area and an achromatic image that appears to be arched three-dimensionally in the second partial area.
  • color is used in the present description as a superordinate term for the various color properties, namely the hue, the saturation and the lightness of a color impression. Sometimes the terms color tone and color intensity are also used. Color means in particular a bright color, i.e. a color that is not black, white or gray or has a purely metallic appearance.
  • the different color impressions arise in particular when viewing the feature area from below (from the relief structure).
  • the printing ink is arranged on the surface of the relief structure (above). The observation therefore takes place from the underside of the relief structure (or through the relief structure).
  • the different color impression in the two partial areas can in particular consist of a different color intensity of the same shade, for example a slightly reddish appearance on the one hand and an intensely red appearance on the other.
  • the relief structures have elevations and depressions, an elevation together with the adjacent depressions often being referred to as a structural element of the relief structures.
  • the structural elements can be formed, for example, by small micromirrors, microlenses, small prisms or three, four or more-sided pyramids.
  • the structural elements typically have two or more flanks, which can be flat or curved.
  • the lateral dimension of a structure element is referred to as the structure width, the vertical dimension as the structure depth.
  • the platelet-shaped effect pigments, the colorants and the relief structure are matched to one another in such a way that the different color impressions are created.
  • the distance and / or the orientation of the effect pigments is predetermined in the subregions by the relief structure.
  • the effect pigments rest - in all subregions - on the relief structure, in particular flat or in places.
  • the color impression is particularly preferably determined in the first of the two partial areas (more) by the effect pigments and in the second of the two partial areas (more strongly) by the colorant.
  • effect pigments are spaced differently from the surface of the relief structure, a correspondingly different amount of colorant is arranged between the effect pigments and the surface of the relief structure.
  • the mean distance between the surface and the effect pigment determines the space available for the colorant.
  • the distance can be set (deliberately controlled) by selecting the size of the effect pigments and the shape and / or size of the structural elements of the relief structure.
  • first and second amounts of colorant are arranged between the effect pigments and the relief structure in the two partial areas, the first and the second partial area.
  • the effect pigments lie (essentially) flat on the surface of the relief in the first partial area.
  • the effect pigments are arranged at a distance from the surface. The effect pigments are thus arranged without any gaps in the first partial area. Consequently, there is no colorant between the relief surface and the effect pigment in the first partial area.
  • the effect pigments are only in places on the surface of the relief structure. The effect pigment is thus arranged in the second partial area from the surface at a distance which is in particular an average distance, for example based on the effect pigment.
  • More than two sub-areas can be provided, for example a first sub-area with effect pigments arranged without spacing, a second and third sub-area with effect pigments spaced differently from the relief.
  • the relief structures in the two subregions are formed by structure elements of a first or second structure width, the ratio of the larger to the smaller structure width being greater than 1.5, preferably greater than 2.0, particularly preferably greater than 4.0, and is very particularly preferably greater than 8.0.
  • the ratio of the larger to the smaller structure width is advantageously not too large and expediently smaller than 50, in particular smaller than 25.
  • the relief structures in the two partial areas are formed by structural elements of a first or second structure depth and the ratio of the larger to the smaller structure depth is greater than 1.2, preferably greater than 1.5, particularly preferably greater than 2 , Is 0.
  • the relief structures in the first sub-area have a smaller structure width and at the same time a greater structure depth than the relief structures in the second sub-area.
  • the relief structure is advantageously formed in at least one partial area by a fine relief structure, advantageously a diffractive relief structure, in particular a hologram structure. Furthermore, the relief structure is advantageously formed in at least one partial area by a medium or coarse relief structure, in particular a micromirror structure, a microlens structure or a microcavity structure.
  • Fine relief structures consist of structure elements with a typical structure width of about 1 ⁇ m and a structure depth which, depending on the desired intensity of the color shade, is above 200 nm, in particular between 200 nm and 1500 nm.
  • Examples of fine relief structures are holgraphic structures.
  • Medium relief structures consist of structural elements with a typical structure width of around 10 ⁇ m and a structure depth of up to 10 ⁇ m.
  • Examples of medium relief structures are micromirror structures.
  • Rough relief structures consist of structural elements with a typical structure width of approximately 15 to 30 ⁇ m, in particular from 20 to 25 ⁇ m, and a structure depth of up to 10 ⁇ m.
  • Examples of rough relief structures are microlens structures.
  • the structure geometry, the structure width and the brilliance of the pigments are of particularly high importance, while with the fine relief structures the color intensity can be adjusted particularly strongly through the structure depth.
  • the flake-form effect pigments advantageously have a ratio of the largest to the smallest diameter (diameter-to-thickness ratio) that is more than 5: 1, preferably more than 10: 1, and particularly preferably more than 50: 1 or even more than 100: 1 amounts to.
  • the largest diameter of the flake-form effect pigments is preferably between 5 ⁇ m and 20 ⁇ m, preferably between 8 ⁇ m and 12 ⁇ m. Platelets with a largest diameter of around 10 ⁇ m have a high reflectivity, while smaller platelets appear less metallic due to the increasing light scattering, which usually has an undesirable effect on the coloring of the printing ink.
  • flake-form effect pigments EP 1 689 586 B1 , WO 2010/069823 A1 and WO 2013/090983 A1 described particles and pigments in question.
  • the platelet-shaped effect pigments have a largest diameter which is in the same order of magnitude as the largest flank width of the structural elements with the larger structural width and which is at least twice as large as the structural width of the structural elements with the smaller structural width.
  • the flanks of the structural elements with the larger structure width are particularly advantageously designed to be flat, so that the platelet-shaped effect pigments can easily be deposited on these flanks when they are printed on.
  • the flanks of the narrower structural elements can also be curved or irregular, as is typically the case with a holographic structure.
  • the flake-form effect pigments have a largest diameter which lies between the smaller and larger of the structural widths of the structural elements of the two subregions.
  • the flake-form effect pigments are metal pigments.
  • the coloring printing ink forms a colored metallization of the relief structures, the colored, metallic color impression differing in the two partial areas.
  • One sub-area advantageously has a weakly colored, predominantly metallic appearance, while the other sub-area appears with an intensely colored metallic color.
  • the relief structure is provided in order to produce an optical appearance (hologram, tilted image, image with movement effect, image with arching effect ...) when it has a reflective layer.
  • an optical appearance hologram, tilted image, image with movement effect, image with arching effect
  • the metal pigments form the reflective layer for the relief structure. The visual appearance does not occur in a partial area with metal pigments arranged at a distance.
  • the metal pigments advantageously show the best possible non-leafing. So they don't move up in the ink. Rather, the metal pigments settle on the surface of the relief structure after the printing ink has been applied.
  • platelet-shaped metal pigments for example, PVD aluminum pigments, PVD brass pigments, PVD copper pigments, aluminum flakes or platelet-shaped nanoparticles come into consideration.
  • the flake-form effect pigments are color pigments.
  • the flake-form effect pigments can be single-layered or multi-layered and consist, for example, of a carrier with a colored or metal layer or a multi-layer interference structure.
  • the colorant of the coloring printing ink is preferably transparent or translucent and can be formed by color pigments or a dye.
  • Solvent formulations that can be used are based on nitrocellulose or polyvinyl butyral as main components, while aqueous systems are based on acrylates and / or polyurethanes, for example.
  • the contrast and the color intensity can in particular also be adjusted by the proportion of colorants, in particular of color pigments, in the printing ink.
  • the relief structures are expediently formed in a transparent layer in order to allow the security element to be viewed from the side of the relief structure to enable forth.
  • the transparent layer can be formed, for example, by a transparent embossing lacquer layer, in particular a UV-curing embossing lacquer layer, a thermoplastic layer, or a transparent film, for example a thermoplastic film.
  • the feature area has at least one further sub-area with different surface geometry and the platelet-shaped effect pigments in the at least one further sub-area are differently aligned and / or spaced due to the different surface geometry of the relief structures, and the printing ink thereby one of the different color impression generated in both sub-areas
  • partial areas with fine, medium and coarse relief structures can be provided and / or partial areas with different structure depths.
  • the depth of the structure can be used to determine the color intensity.
  • the orientation of the effect pigments can be uniform in both subregions, for example in each case parallel to the main surface but with different distances.
  • the effect pigments can, however, also be aligned in one sub-area and be unaligned in the other sub-area, e.g. with a randomly distributed alignment.
  • the distance between the effect pigments can even be the same in both subregions and the alignment can be different. Combinations with more than two - such first and / or second - partial areas are provided.
  • the security element can also have further functional layers, protective lacquer layers and further authenticity features and can in partial areas be provided with recesses to enable a partial view.
  • Recesses can in particular be provided in the coloring printing ink, in which case both the colorant and the effect pigments can be removed in the area of the recess, or only the effect pigments can be removed or modified while the colorant remains in the layer.
  • the invention also contains a data carrier with a security element of the type described.
  • the security element can in particular be arranged in a window area of the data carrier, for example over an opening or a transparent or translucent part of the data carrier.
  • the data carrier can in particular be a value document, such as a bank note, in particular a paper bank note, a polymer bank note or a laminated film bank note, a share, a bond, a certificate, a voucher, a check, a high-quality admission ticket, but also an identity card such as a credit card, a bank card, a cash card, an authorization card, an identity card or a passport personalization page.
  • the colorant and the flake-form effect pigments are advantageously spatially separated in at least one of the subregions when the printing ink is applied to the feature area, in particular separated in the vertical direction.
  • the colorant is arranged according to the distance between the effect pigment and the relief structure.
  • Figure 1 shows a schematic representation of a bank note 10 which is provided with a security element according to the invention in the form of a wide security strip.
  • the invention is not limited to security strips and banknotes, but can also be used, for example, with partially embedded security threads or with foil patches and cover foils that are arranged over an opaque area, a window area or a continuous opening of any data carrier.
  • the security strip 12 of the Fig. 1 shows in plan view in a feature area 14 a colored, metallic appearance with different color tones or color intensities in areas, the areas of different colors being arranged in register with the patterns 16 and characters 18 of the security strip 12.
  • color is used as a generic term for the various color properties.
  • the patterns 16 are shown there schematically as geometric shapes for illustration, but in practice the patterns 16 can of course also form more complex patterns, characters or codes, for example architectural or technical motifs, natural motifs or portraits.
  • the security element 12 When viewed from above, the security element 12 shows a slightly reddish and predominantly metallic appearance, precisely in register, in the areas of the pattern 16 and the sequence of digits 18, while the surrounding background areas 15 appear with an intense red metallic color.
  • FIGS Fig. 2 shows a schematic cross section of the security element 12 along the line II-II of FIG Fig. 1 shows.
  • FIGS Fig. 2 shows a schematic cross section of the security element 12 along the line II-II of FIG Fig. 1 shows.
  • Fig. 2 only the layers of the layer structure that are essential for the present invention are shown and any further layers, such as adhesive layers, protective lacquer layers, further functional layers or a carrier film, have been omitted for the sake of simplicity.
  • the security element 12 contains a transparent embossing lacquer layer 20 in which at least two partial areas 22, 24 with relief structures of different surface geometries are provided in the feature area 14.
  • a first sub-area 22 which is the background area 15 of the Fig. 1 forms, the relief structures are fine and deep, while they are in a second partial area 24, the outline of which the pattern 16 of the Fig. 1 forms, are relatively coarse and flat.
  • the relief structures in the first, fine sub-area 22 are formed by structure elements 32 with a structure width of 1 ⁇ m and a structure depth of 0.8 ⁇ m
  • the relief structures in the second, coarse sub-area 24 are formed by structure elements 34 with a structure width of 10 ⁇ m and a structure depth of 0.5 ⁇ m.
  • the ratio of the larger to the smaller structure width is thus V.
  • the ratio of the larger to the smaller structure depth is V.
  • the relief structures 32 of the first partial area 22 have a smaller structure width (1 ⁇ m) and a greater structure depth (0.8 ⁇ m) than the relief structures 34 of the second partial area 24.
  • a coloring printing ink 40 is printed onto the feature area 14 with the two partial areas 22, 24, which in addition to a translucent red colorant 42 contains a large number of platelet-shaped metal pigments 44.
  • the platelet-shaped metal pigments 44 have a high ratio of platelet diameter to platelet thickness of 20: 1 or more.
  • the mean value of the largest platelet diameter (that is, the diameter in the plane of the platelets) is around 10 ⁇ m in the exemplary embodiment, while the plate thickness is below 1 ⁇ m, for example 200 nm.
  • much thinner platelets with platelet thicknesses down to 5 to 20 nm can also be used with advantage.
  • the different structural sizes of the structural elements 32, 34 lead to a different interaction in the two subregions 22, 24 of the red colorant 42 and the platelet-shaped metal pigments 44 with the embossed structure and in particular to a different, targeted spatial separation of colorant 42 and metal pigments 44.
  • the red colorant 42 flows into the depressions 36 of the fine structural elements 32 after the printing ink 40 has been applied, while the platelet-shaped metal pigments 44, because of their size, which far exceeds the structural width of the structural elements 32, approach the tips of the elevations (schematically in the left half of the Fig. 2 shown).
  • the subarea 22 produces an intense red color impression through the depressions of the structural elements 32 filled with colorant 42 and the metal spices 44 lying below the colorant 42 as seen from the viewer 50.
  • the flank width of the structural elements 34 is of the same order of magnitude as the platelet size of the metal pigments 44; in addition, the structural elements 34 are only formed with a shallow slope.
  • the metal pigment platelets 44 are therefore largely deposited on the flanks 38 of the wide structural elements 34 when the printing ink 40 is printed in the sub-area 24, while the flowable colorant 42 essentially collects over the platelet-covered structural elements (schematically in the right-hand half of the figure Fig. 2 shown).
  • the subarea 24 thus produces an only slightly reddish, predominantly metallic color impression because of the dominant metallic reflection of the metal pigments 44.
  • the different color impressions of the partial areas 22, 24 are directly due to the interaction between the characteristic properties of the metal pigments 44 or of the colorant 42 on the one hand and the surface geometry of the relief structures on the other hand, the different color impressions are automatically perfect for the areas formed by the structural elements 32, 34 passed.
  • the patterns 16 and characters 18 can be formed by micromirror arrangements in which the individual micromirrors 34 have a dimension of approximately 10 ⁇ m, while the background area 15 is formed by fine, holographic structures 32 with structure widths of the order of 1 ⁇ m.
  • platelet-shaped effect pigments for example platelet-shaped color pigments, can in principle also be provided in the printing ink.
  • an image When viewed from the other side, i.e. the top of the representation of the Fig. 2 ago, an image would result that only or at least partially represents a negative image.
  • the security element 12 of the Figures 1 and 2 can be produced, for example, by coating a carrier film with the transparent embossing lacquer layer 20 and embossing the desired relief structure with the structural elements 32, 34 in the embossing lacquer layer 20.
  • a flowable coloring printing ink 40 with the red colorant 42 and the platelet-shaped metal pigments 44 is then printed onto the embossed relief structure, the colorant 42 and the metal pigments 44 spatially separating from one another as described above according to the local surface geometry of the subregions 22, 24.
  • the security element 12 is then typically subjected to further processing steps in which, for example, cutouts are produced in the printing layer 40 and / or further functional, protective or adhesive layers are applied.
  • the finished security element can be saved on a data carrier such as the one in Fig. 1
  • the banknote shown can be glued on or partially embedded in a data carrier. It should be noted in the exemplary embodiment that the application or introduction takes place in such a way that the finished security element 12 is viewed from the side of the embossing lacquer layer, that is to say the underside of the illustration of the Fig. 2 is aligned.
  • the carrier film on which the layer structure of the security element is built up during production can also be peeled off again after it has been transferred to a target substrate.
  • FIG 3 shows an embodiment of a bank note 60 with a window area 62 over which a security element 64 according to the invention is arranged.
  • the security element 64 is basically like the security element 12 of FIG Fig. 2 but additionally contains see-through areas 66 which are formed by cutouts in the color layer 40.
  • the security element 64 contains a transparent embossing lacquer layer 20, which has two partial areas 22, 24 with relief structures of different surface geometries in a feature area.
  • a printing layer 40 which, in addition to a translucent, for example red colorant, also contains a large number of platelet-shaped metal pigments.
  • the color layer 40 of the security element 64 is additionally provided with pattern-shaped cutouts 66.
  • the security element 64 is transparent, so that the pattern formed by the recesses becomes visible in transmitted light.
  • the recesses 66 can, for example, be produced by printing technology by printing the ink layer 40 only in certain areas, or also by local laser application of a printing layer that is initially applied over the entire surface.
  • FIG Fig. 4 Another, more complex embodiment of the invention is shown in FIG Fig. 4 shown.
  • a bank note 70 is provided with a security element 74 according to the invention in a window area 72.
  • the security element 74 is basically like the security element 64 of FIG Fig. 3 but additionally contains a second embossing lacquer layer 80 and a second printing layer 82 with recesses 84.
  • the security element 74 contains a first transparent embossing lacquer layer 20, which has two partial areas 22, 24 with relief structures of different surface geometries in a feature area.
  • a first printing layer 40 is provided on the first embossing lacquer layer 20, which, in addition to a translucent, for example red, colorant, also contains a large number of platelet-shaped metal pigments. The interaction between the metal pigments and the colorant on the one hand and the surface geometry of the relief structures on the other hand creates an intense red-metallic color impression in sub-area 22 and a slightly reddish, strongly metallic color impression in sub-area 24. The red or reddish color impression The color impression is visible in the recesses 84 of the second printing layer 82.
  • the security element 74 also contains a second transparent embossing lacquer layer 80 which, in a feature area, has two partial areas 86, 88 with relief structures of different surface geometries.
  • a second printing layer 82 is provided on the second embossing lacquer layer 80, which, in addition to a translucent, for example blue colorant, also contains a large number of platelet-shaped metal pigments. The interaction between the metal pigments and the colorant, on the one hand, and the surface geometry of the relief structures of the subareas 86, 88, on the other hand, creates an intense blue-metallic color impression in subarea 86 and a slightly bluish, strongly metallic color impression in subarea 88.
  • the second printing layer 82 of the security element 74 is provided with recesses 84 in the form of a pattern.
  • the intensely red or slightly reddish color impression of the layers 20, 40 is visible in the area of the cutouts 84.
  • the areas in which the cutouts 84 lie above the cutouts 66 of the first color layer 40 form see-through areas in which the security element 74 is completely transparent.

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Claims (15)

  1. Élément de sécurité destiné à la sécurisation de papiers de sécurité, documents de valeur et autres supports de données (10), ayant une zone caractéristique colorée avec différentes couleurs, dans lequel
    - la zone caractéristique (14) comporte au moins deux zones partielles (22, 24) ayant des structures en relief de différente géométrie de surface ;
    caractérisé en ce que
    - la zone caractéristique est pourvue d'une encre d'impression (40) colorante comportant un agent colorant (42) et une pluralité de pigments à effets (44) en forme de paillettes et
    - par la différente géométrie de surface des structures en relief, les pigments à effets (44) en forme de paillettes, dans les deux zones partielles (22, 24),
    + sont orientés différemment et, dans au moins une des deux zones partielles, sont espacés de la surface de la structure en relief,
    ou
    + sont espacés différemment de la surface de la structure en relief, et
    l'encre d'impression (40) génère de ce fait dans les deux zones partielles (22, 24) différentes impressions de couleur.
  2. Élément de sécurité selon la revendication 1, caractérisé en ce que les structures en relief sont, dans les zones partielles (22, 24), constituées par des éléments structurels (32, 34) d'une première ou deuxième largeur de structure, et que le rapport entre la plus grande et la plus petite largeur de structures est supérieur à 1,5, de préférence supérieur à 2,0, particulièrement de préférence supérieur à 4,0.
  3. Élément de sécurité selon la revendication 1 ou 2, caractérisé en ce que les structures en relief sont, dans les zones partielles (22, 24), constituées par des éléments structurels (32, 34) d'une première ou deuxième profondeur de structure, et que le rapport entre la plus grande et la plus petite structure est supérieur à 1,2, de préférence supérieur à 1,5, particulièrement de préférence supérieur à 2,0.
  4. Élément de sécurité selon au moins une des revendications de 1 à 3, caractérisé en ce que les structures en relief présentent dans la première zone partielle (22) une largeur de structure plus petite et en même temps une plus grande profondeur de structures que les structures dans la deuxième zone partielle (24).
  5. Élément de sécurité selon au moins une des revendications de 1 à 4, caractérisé en ce que la structure en relief dans au moins une zone partielle (22, 24) est constituée par une structure en relief diffractive, en particulier par une structure d'hologramme, une structure de micro-miroir, une structure de micro-lentilles ou une structure de micro-cavités.
  6. Élément de sécurité selon au moins une des revendications de 1 à 5, caractérisé en ce que, dans la première des deux zones partielles (22), les pigments à effets (44) sont agencés en un premier espacement par rapport à la surface de la structure en relief, et que, dans la deuxième des deux zones partielles (24), les pigments à effets (44) sont agencés sans espacement ou en un deuxième espacement par rapport à la surface de la structure en relief.
  7. Élément de sécurité selon au moins une des revendications de 1 à 6, caractérisé en ce que, dans la première des deux zones partielles (24), les pigments à effets sont agencés en un première orientation, et que, dans la deuxième des deux zones partielles (22), les pigments à effets ne sont pas orientés ou sont orientés en une deuxième orientation, cependant que les pigments à effets sont, dans la première et/ou dans la deuxième zone partielle, agencés en un espacement par rapport à la surface de la structure en relief.
  8. Élément de sécurité selon au moins une des revendications de 1 à 7, caractérisé en ce que les différentes impressions de couleur sont déterminées au moins aussi par différentes quantités d'agent colorant agencées entre les pigments à effets (44) et la structure en relief.
  9. Élément de sécurité selon au moins une des revendications de 1 à 8, caractérisé en ce que les pigments à effets (44) en forme de paillettes présentent un rapport entre le plus grand et le plus petit diamètre (rapport entre diamètre et épaisseur) qui est supérieur à 5:1, de préférence supérieur à 10:1, particulièrement de préférence supérieur à 50:1 ou même supérieur à 100:1 ; et/ou le plus grand diamètre des pigments à effets (44) en forme de paillettes est compris entre 5 µm et 20 µm, de préférence entre 8 µm et 12 µm.
  10. Élément de sécurité selon au moins une des revendications de 1 à 9, caractérisé en ce que les pigments à effets (44) en forme de paillettes ont un plus grand diamètre qui se situe dans le même ordre de grandeur que la largeur des flancs des éléments structurels (34) ayant la plus grande largeur de structure et qui est au moins deux fois plus grand que la largeur des flancs des éléments structurels (32) ayant la plus petite largeur de structure.
  11. Élément de sécurité selon au moins une des revendications de 1 à 10, caractérisé en ce que les pigments à effets (44) en forme de paillettes ont un plus grand diamètre qui se situe entre la plus petite et la plus grande des largeurs de structure des éléments structurels (32, 34) des deux zones partielles (22, 24).
  12. Élément de sécurité selon au moins une des revendications de 1 à 11,
    caractérisé en ce que
    les pigments à effets (44) en forme de paillettes sont des pigments métalliques ou des pigments de couleur ; et/ou
    les structures en relief sont engendrées dans une couche transparente, en particulier dans une couche transparente de vernis de gaufrage (20).
  13. Élément de sécurité selon au moins une des revendications de 1 à 12, caractérisé en ce que la zone caractéristique comporte au moins une autre autre zone partielle ayant une différente géométrie de surface, et que les pigments à effets (44) en forme de paillettes sont en outre, dans la au moins une autre zone partielle, espacés et/ou orientés différemment par la différente géométrie de surface des structures en relief, et que l'encre d'impression génère de ce fait une différente impression de couleur des deux zones partielles (22, 24).
  14. Support de données ayant un élément de sécurité selon au moins une des revendications de 1 à 13.
  15. Procédé de fabrication d'un élément de sécurité selon une des revendications de 1 à 13, dans lequel
    - un support est mis à disposition et pourvu d'une couche de préférence transparente,
    - la couche est, dans une zone caractéristique, pourvue d'au moins deux zones partielles (22, 24) ayant des structures en relief de différente géométrie de surface,
    caractérisé en ce que
    - la zone caractéristique est pourvue d'une encre d'impression (40) colorante apte à s'écouler, laquelle comporte un agent colorant (42) et une pluralité de pigments à effets (44) en forme de paillettes, cependant que par la différente géométrie de surface des structures en relief, les pigments à effets (44) en forme de paillettes, dans les deux zones partielles (22, 24),
    + sont orientés différemment et, dans au moins une des deux zones partielles, sont espacés de la surface de la structure en relief,
    ou
    + sont espacés différemment de la surface de la structure en relief, et
    l'encre d'impression (40) génère de ce fait dans les deux zones partielles (22, 24) différentes impressions de couleur.
EP18720512.5A 2017-04-12 2018-04-09 Élément de sécurité comportant une zone caractéristique colorée Active EP3609717B1 (fr)

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DE102017003603.9A DE102017003603A1 (de) 2017-04-12 2017-04-12 Sicherheitselement mit farbigem Merkmalsbereich
PCT/EP2018/000175 WO2018188784A1 (fr) 2017-04-12 2018-04-09 Élément de sécurité comportant une zone caractéristique colorée, support de données et procédé de fabrication d'un élément de sécurité

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EP3609717B1 true EP3609717B1 (fr) 2021-06-09

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US12064987B2 (en) 2019-04-26 2024-08-20 Viavi Solutions Inc. Optical device with magnetic flakes and structured substrate
WO2022053826A1 (fr) * 2020-09-11 2022-03-17 De La Rue International Limited Dispositifs de sécurité et leurs procédés de fabrication
DE102021002471A1 (de) * 2021-05-10 2022-11-10 Giesecke+Devrient Currency Technology Gmbh Sicherheitselement mit Volumenhologramm und zusätzlichen Effekten

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ES2171747T3 (es) * 1995-11-28 2002-09-16 Ovd Kinegram Ag Soporte de informacion optica.
JP3537426B2 (ja) * 2002-04-10 2004-06-14 独立行政法人 国立印刷局 真偽判別可能な印刷物
GB0326576D0 (en) 2003-11-14 2003-12-17 Printetch Ltd Printing composition
DE102006052413A1 (de) * 2006-11-07 2008-05-08 Giesecke & Devrient Gmbh Sicherheitsfolie
US20120029121A1 (en) 2008-12-19 2012-02-02 Basf Se Thin aluminium flakes
DE102009053925A1 (de) * 2009-11-19 2011-05-26 Giesecke & Devrient Gmbh Sicherheitselement mit Mikrostruktur
CN102639651B (zh) * 2009-11-27 2016-03-16 巴斯夫欧洲公司 用于加密元件和全息图的涂料组合物
FR2953965B1 (fr) * 2009-12-14 2011-11-25 Arjowiggins Security Element de securite comportant une structure optique
EP3351981A1 (fr) * 2011-06-23 2018-07-25 Viavi Solutions Inc. Dispositifs à variations chromatiques multiples
AU2011101684B4 (en) 2011-12-22 2012-08-16 Innovia Security Pty Ltd Optical Security Device with Nanoparticle Ink
JP6203253B2 (ja) * 2012-06-14 2017-09-27 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ セキュリティエレメント及びホログラムの製造方法
DE102013108666A1 (de) * 2013-08-09 2015-03-05 Leonhard Kurz Stiftung & Co. Kg Verfahren zur Herstellung eines Mehrschichtkörpers sowie Mehrschichtkörper
DE102014018204A1 (de) * 2014-12-09 2016-06-09 Giesecke & Devrient Gmbh Sicherheitselement, Verfahren zum Herstellen desselben und mit dem Sicherheitselement ausgestatteter Datenträger
DE102015010744A1 (de) * 2015-08-17 2017-02-23 Giesecke & Devrient Gmbh Sicherheitselement, Verfahren zum Herstellen desselben und mit dem Sicherheitselement ausgestatteter Datenträger

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EP3609717A1 (fr) 2020-02-19
DE102017003603A1 (de) 2018-10-18

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