Security feature, the valuable and / or secure product containing the security feature, and the method for manufacturing the valuable and / or secure product

Abstract

Security feature (200) comprising at least one luminescent agent on and / or in a product carrier (110, 110'), wherein the security feature (200) further comprises at least one absorptive spectral filtering agent in and / or on the product carrier (110, 110') for luminescence radiation emanating from the at least one luminescent agent, wherein at least one luminescence pattern formed with the at least one luminescent agent and at least one absorptive pattern formed with the at least one absorptive spectral filtering agent form a single layer, such that the pattern elements (280, 280') are located in a pattern element layer (240; 250; 260) containing both the at least one luminescent agent and the at least one absorptive spectral filtering agent, characterized in that the at least one absorptive spectral filtering agent is formed in at least one pattern with printing inks according to the CMYK color space (201) is included.

Description

The present invention relates to a security feature and a security product and / or security product containing this security feature, in particular a security and / or security document. Such a value and / or security document can be, for example, a passport, identity card, driver's license or another ID card or a payment means, in particular a banknote. In the case of a personal identification card, its front side carries, for example, the light image and the name of the owner. Such documents are typically manufactured in standardized formats, for example in the ID 1, ID 2 or ID 3 format according to ISO 7810. The documents can fundamentally consist of an organic polymer or a ceramic material, paper, cardboard or of metal or contain this. Cards and card-shaped components of book-like documents can preferably be produced from polymer films laminated to one another.The security features used in the value and / or security documents can serve exclusively to demonstrate the authenticity of the products independently of their type or of their user. Such security features are, for example, colored fibers, guilloches, the special paper of bank notes and the like. Individualizing, for example personalizing, security features also contain, in encoded form or in plain text, information about the type of document, the user of this document or an object to which the document is unambiguously assigned. Such information may be a facial image (photo) of the user, personal data such as name, birthday, birth place, signature, or a personal identifier such as a member No. Another security feature which specifies the document can be, for example, a serial number of the document.DE 10 2007 018 450 A1 discloses a laminated security document which is present in the form of a document composite which has at least one inner layer and at least two overlay films covering the inner layer. The inner layer contains a color light image with the face image of the document holder. The color light image is an exposed positive-positive silver dye bleach photoemulsion. Furthermore, it is also known to produce the facial image of a person on an identity or security document by means of printing technology. Reference is made to DE 199 06 388 A1. This document relates to a method and apparatus for personalizing and verifying such documents.A security and / or value document having an individualizing security feature is specified, for example, in DE 10 2008 012 423 A1. This document is formed as a polymer layer composite which is produced by lamination from a plurality of substrate layers and in which at least one individualizing information item is stored by printing. The information is broken down in the assemblage into at least two print digests, each of which comprises a portion of the information. The at least two print extensions are arranged in at least two planes spaced apart from one another. In one embodiment specified in this document, it is provided that a print image embodied by the information is broken down into image points and each image point is assigned to exactly one of the at least two print extracts. For example, the print may represent a facial image. To produce the document, the print separations are printed on the substrate layers. After laminating the printed substrate layers, the printed surfaces are inside the document. In a further embodiment, luminescent agent can be applied to a substrate layer surface arranged below the print extracts, so that white light is emitted two-dimensionally in the case of UV excitation. The light is filtered through the pixels of the print extracts arranged above it, so that the information can be seen in color preferably in the case of a vertical top view.It is also known to produce a density in a radiation-sensitive layer, for example in the form of a portrait photo of an identity card holder, a signature or the like, by laser engraving (EP 0 975 148 A1). In this way, security features can also be produced by means of lasers, for example, by engraving in a layer lying on the inside of a multilayer laminated carrier material (DE 199 07 940 A1). However, only blackened portions are formed by the laser engraving, so that the individualizing security feature produced is produced only in a black / white representation.DE 10 2004 021 248 A1 describes a security element for protecting valuable articles, having a first light-polarizing layer made of a cholesteric liquid-crystalline material which selectively reflects light having a predetermined circular polarization and which selectively reflects light of a first wavelength range in a first reflection direction and light of a second wavelength range in a second, different reflection direction, a second light-polarizing layer which selectively reflects light having the circular polarization opposite the predetermined circular polarization and which selectively reflects light of the first or second wavelength range in the first or second reflection direction, and a luminescence layer present at least in regions, on which the first and second light-polarizing layers are arranged one above the other. The luminescent layer contains a luminescent substance which emits in the first and / or second wavelength range after excitation with excitation radiation lying outside the visible spectral range.US 2012 / 0 080 877 A1 describes methods and systems for optical effects in pigments, printing inks and on media. One aspect relates to a pigment particle comprising a core having a fluorescent material and a spherical shape and a shell surrounding the core; the shell contains a photochromic material having a first optical property in a first light source and a second optical property in a second light source comprising a set of wavelengths that are not sufficiently present in the first light source. The second optical property attenuates the radiation emitted from the fluorescent material.However, there is a constant need for novel, in particular individualizing, for example personalizing, security features which are secured against forgery and / or corruption and / or copy and which are easily recognizable by a person for the assignment of the information encoded therewith to the user and / or the object. For example, the security feature should be located in an inner product layer which is secure against forgery and / or corruption and / or copy. Alternatively, the security feature can also be used to secure personalization on an outer product layer. The present invention is furthermore based as a substantial further object on creating a security feature which can be realized cost-effectively, simply and quickly.Insofar as the term "valuable and / or security product" and in particular the term "valuable and / or security document" are mentioned in the description and in the claims of the present application, this includes, for example, a passport, personal identification card, driver's license or another ID card or an access control identification card, a vehicle license, vehicle letter, visa, check, payment means, in particular a banknote, a check, bank, credit or cash card, customer card, health card, chip card, a company identification card, proof of authorisation, member identification card, gift or shopping coupon, freight letter or another proof of authorisation, control sign, postage value sign, ticket, (Game) Slip, adhesive label (for example for product securing) or another ID document. The product may be, for example, a smart card. The security and / or value document can be present in the ID 1, ID 2, ID 3 or in any other format, for example in the form of a booklet, such as in the case of a pass-like object. A security and / or valuable product is generally a laminate of a plurality of document layers which are joined together in a planar manner in a registered manner under the action of heat and under elevated pressure. These products are said to meet the standardized requirements, for example ISO 10373, ISO / IEC 7810, ISO 14443. The product layers consist, for example, of a carrier material which is suitable for lamination. In addition to value and / or security documents, the term "value and / or security product" also includes patches, labels and the like, which as security elements are or are non-detachably connected to the document carrier and form the security feature there.Insofar as the term "security feature" is mentioned in the description and in the claims of the present application, according to the present invention this is to be understood as meaning the totality of optically active substances, namely the at least one luminescent means and the at least one absorptive spectral filter means, which are present in a relative arrangement to one another so that a visually perceptible pattern is formed. The security feature can be produced as a component of a value and / or security document or as a separate product (security element) which is non-detachably connected to a value and / or security document, for example as a patch, label or the like. This can be bonded to the document, for example, wherein a lacquer can also be used as the adhesive. The security feature will generally occupy only a portion of the area of the document.Insofar as the term "luminescence" is mentioned in the description and in the claims of the present application, this is to be understood as fluorescence, phosphorescence, namely both with Stokes and anti-Stokes shift. According to the present invention, this is preferably to be understood as photoluminescence. Furthermore, luminescence can also be electroluminescence, for example.Insofar as the term "pattern" is mentioned in the description and in the claims of the present application, this is to be understood as meaning a somewhat shaped distribution of visible elements, preferably in a two-dimensional arrangement, which result in a self-contained representation, for example an image, picture element, characters, in particular an alphanumeric character, a symbol, scales, a formula or the like.Insofar as the term "pattern element" is mentioned in the description and in the claims of the present application, this is to be understood as a constituent part of a pattern. A pattern element serves as the smallest structural element for forming the pattern, all the pattern elements forming the pattern. The pattern element forming material may be either transparent, translucent or opaque. Furthermore, it can have a specific brightness (absorption, remission), i.e. it can have, for example, a density, grey shade or white shade, and / or it can have a (spectral) coloring and in this, in turn, a specific brightness. The pattern elements may have a circular (punctiform), rectangular, square, hexagonal or yet another shape. Pattern elements may be the smallestThese elements may be elements of a perceivable representation, to which one of the color values or color tones can be assigned in each case in a chromatic color space (subtractive CMYK color space, additive RGB color space). The individual pattern elements can each still be composed of pixels, so that a pattern element is formed from a plurality of primary colors of the color space and the respective color tone of the pattern element.The object underlying the present invention is achieved by the security feature according to the invention and the security document according to the invention containing the security feature. The security feature contains on and / or in a product carrier, for example in one or more pattern planes, in particular on one of the product carrier surfaces, wherein in particular an inner surface is considered, at least one luminescent agent and additionally at least one absorptive spectral filter agent for luminescent radiation emanating from the at least one luminescent agent. The at least one absorptive spectral filter means can also be located on one of the product carrier surfaces, in particular one of the inner surfaces. At least one luminescent pattern formed with the at least one luminescent means and at least one pattern formed with the at least one absorptive spectral filter means form a single layer, so that the pattern elements lie in a pattern element layer containing both the at least one luminescent means and the at least one absorptive spectral filter means, wherein the at least one absorptive spectral filter means is contained in at least one pattern formed with printing inks according to the CMYK color space.The at least one absorptive spectral filter means forms a security feature visible to the eye, for example the portrait image of a person, in particular of the document holder. The security feature can be formed, for example, by a multicoloured representation of any pattern. The spectral filter means, on account of their optical absorption properties in the visible spectral range, have a filtering effect on the luminescence radiation emanating from the at least one luminescence means. As a result, the facial image appears colored not only under normal illumination with, for example, white light (with spectrally broadband radiation in the visible range), i.e. with more than two color tones (with different color impressions, which are not solely due to brightness differences), but also under illumination conditions under which luminescence is normally observed, i.e. without illumination with visible light, but exclusively with electromagnetic radiation with which the at least one luminescent agent is excited.For example, the portrait image of the document holder on an ID document has hitherto only been realized by an image which appears multicoloured exclusively when illuminated with light in the visible spectral range. In order to increase the security of such documents against forgery and / or corruption and / or copy, in principle, a monochrome shadow image with a colour that is luminescent in the visible spectral range and that can be excited by means of UV radiation could also be generated. The introduction of RGB shadow images is known and commercially available. However, in this case, often only introduction into paper documents is possible on account of the inks used. For the secure introduction of personalization information into a highly secure document body which is made of polycarbonate, for example, inks and printers are currently available only to a limited extent. In particular, it is desirable to limit the number of print heads required. Moreover, color management is difficult in principle when generating an RGB shadow image, since slightly different excitation, which results, for example, from the selection of different commercial UV lamps, often results in different excitation of the three luminescent substances, so that the generated image generates a somewhat different color impression in each case.By the luminescence of the at least one excited luminescence means and the spectral filtering of the luminescence light emanating therefrom in the visible spectral range by means of the at least one absorptive spectral filter means forming the pattern, a desired multicolored pattern can also be reproduced in multicolor under the verification conditions for luminescent security features according to the present invention. Therefore, it is not necessary to form the (subject) luminescent pattern for generating the luminescent pattern image from luminescent (basic) colors suitable for this purpose, for example by generating print separations with luminescent colorants suitable for this purpose in a respective (basic) color (for example red, green and blue according to the RGB color space) and then forming the luminescent pattern from the luminescent print separations by color mixing. Rather, the luminescent pattern image is already obtained with the aid of the design of an original, in particular a printed original, that can be perceived with visible light under conventional lighting conditions. For this purpose, it is entirely sufficient to filter the radiation emanating from the luminescent agents by means of the colorants, for example printing inks, so that the pattern appearing multicoloured when viewed in the visible spectral range appears multicoloured even under luminescence illumination conditions (i.e. without illumination with radiation visible to the human eye) with substantially the same colour distribution, i.e. with natural colour distribution. A possible color tinge is compensated by the human eye and nevertheless perceived as white.Of course, a pattern executed in the visible spectral range in conventional illumination will only appear monochromatic or black / white or in grey shades, likewise only monochromatic or black / white or in grey shades, under luminescence observation. As such, the present invention extends to both monochrome, black / white and gray-tone representations of a pattern as well as to the multicolor (e.g., two, three or multicolor) pattern representation discussed above. Thus, under luminescent lighting conditions, a pattern will then appear with substantially the same color / black-and-white / gray distribution as under conventional conditions, with visible light illumination. Therefore, instead of a colored pattern, i.e. one having more than two colors, the security feature according to the invention can also be used to display single-color or black / white patterns or patterns formed in gray shades.If the luminescent radiation is very broad-band in the visible spectral range, practically white luminescent light can be generated (optionally apart from a slight color tinge). This is achieved by additive color mixing by a plurality of luminescence agents emitting over a broad band, but also by a plurality of luminescence agents emitting over a narrow band or by a mixture of luminescence agents emitting over a narrow band and over a broad band. In this case, the luminescent radiation filtered by the absorptive spectral filter means and incident on the observer's eye appears with the same color as the at least one spectral filter means under normal lighting conditions in the visible spectral range. If the luminescent radiation is not white but colored, for example because certain spectral components occur proportionally more strongly than others, the security feature is reproduced with a corresponding color tinge. However, since the human eye adapts to different color temperatures, such a color tinge is hardly perceived without comparison possibility. Of course, the at least one spectral filter means cannot filter out any luminescent radiation by filtering that is not already present. Therefore, the pattern display will appear dark in the areas whose color of the spectral filter substance lies in a spectral range in which no luminescent radiation is emitted.To produce the valuable and / or security product according to the invention, first (a) a product carrier or a precursor of the valuable and / or security product according to the invention is provided, then (b) the at least one luminescent agent and the at least one absorptive spectral filter agent are applied to at least one of the surfaces of the product carrier or of the precursor. The precursor can then be connected to further product carrier layers or coated with further product layer material, so that the surface(s) provided with the at least one luminescent means and / or the at least one absorptive spectral filter means is / are arranged lying inside the value and / or security document, namely in one or more pattern planes.For verification of the valuable and / or security product according to the invention with the aid of the security feature according to the invention, (a) the product with the security feature is first placed in a device suitable for this purpose, (b) the security feature of the product is illuminated with visible light and the security feature is viewed; this includes either direct viewing by humans or machine viewing by means of devices and image evaluation systems suitable for this purpose; and (c) the security feature of the product is illuminated with the excitation radiation for the at least one luminescent agent and the security feature is viewed in the form of luminescent light emitted in the visible spectral range; the latter step also includes either direct viewing by humans or machine viewing by means of devices and image evaluation systems suitable for this purpose. Steps b) and c) are preferably carried out successively. A device suitable for verification has a holder for the product, a light source for visible light and a light source for electromagnetic radiation in the spectral range for excitation of the at least one luminescent agent, for example a UV light source. Furthermore, a suitable optical system, recording and evaluation systems can also be provided. The verification can be considered successful if the pattern forming the security feature appears not only when illuminated in the visible spectral range but also under luminescence illumination conditions and furthermore if the two pattern representations are reproduced identically and with a predefined appearance.According to the invention, the at least one absorptive spectral filter means is present in the form of colors predefined according to the CMYK color space, for example in the form of printing inks with which print separations are produced, wherein the print separations are composed to form an in particular colored pattern. For this purpose, color separations in the primary colors C (cyan), M (magenta), Y (yellow) and K (key=blown fraction) are generally produced and these color separations are assembled one above the other to form the pattern, preferably on the same surface on or in the product, very particularly preferably directly one above the other, i.e. in contact with one another.For example, the at least one absorptive spectral filter medium can be used in printing inks or printing inks by one or more printing inks or colorants in the form of dyes or pigments. The absorptive spectral filter medium can either be a single colorant having a predetermined absorption and remission spectrum or a mixture of a plurality of colorants, each having an individual absorption and remission spectrum and having in the mixture an absorption and remission spectrum different from the individual colorants, which results from the spectra of the individual colorants subtractively. The absorptive spectral filter medium can be formed by one or more organic colorants or by one or more inorganic colorants or by a mixture of at least one organic and at least one inorganic colorant. Organic colorants may typically be azo compounds. Inorganic colorants may be, for example, carbon black and titanium dioxide. In addition, the absorptive spectral filter medium may contain further customary constituents, for example solvents, binders, resins, varnishes and auxiliaries, such as brighteners. In particular, it is preferred if the at least one absorptive spectral filter means is transparent or translucent in the manner of a glaze. It is preferred that the absorptive spectral filter means is also transparent to the excitation radiation for the at least one luminescent means.For example, the facial image of the document holder can be printed in color by means of printing inks suitable for this purpose, for example in a plurality of color separations, which can be formed, for example, in a plurality of pattern planes. Owing to their optical absorption properties in the visible spectral range, these printing inks have a filtering effect on the luminescence radiation emanating from the at least one luminescence agent. By combining the optical filter properties of the at least one absorptive spectral filter means, which has little or no luminescence under excitation conditions for the luminescence means, with the at least one luminescence means, which has a strong luminescence under the luminescence illumination conditions, a pattern is perceptible under the luminescence illumination conditions, which pattern appears like the pattern perceptible under normal observation.In a possible development of the present invention, the absorptive spectral filter means do not luminescence even when excited with electromagnetic radiation. However, it may be advantageous to select at least one or more of the absorptive spectral filter means, optionally also all of them, in order that it / they luminesc / luminesc in the visible spectral range under the excitation conditions for the at least one luminescent means, namely with a suitable color in each case (i.e. with a spectral distribution of the luminescent radiation which is at least similar to that of the light emission of the absorptive spectral filter means), because a more brilliant display is thus achieved even when viewing the pattern under normal lighting conditions, for example when displaying a portrait image of a person whose skin color has a more natural appearance. In addition, spectral components of the pattern in which the luminescent agent does not or hardly luminesc. For example, the magenta color separation of the pattern can preferably be produced with a spectral filter means which additionally luminesces in consideration of the color shift during the luminescence. Thus, at least one of the at least one absorptive spectral filter means according to this preferred development of the present invention does not generate any luminescent radiation upon excitation, while at least one further absorptive spectral filter means under the excitation conditions for the at least one luminescent means fluoresces in the visible spectral range. This additional property can be achieved by the absorptive spectral filter medium containing, in addition to one or more colorants, one or more brighteners which luminesc due to the excitation with electromagnetic radiation, or by the fact that it is formed by one or more colorants which, in addition to the absorptive, also have / do luminescent properties.In a preferred development of the present invention, the excitation radiation used for exciting the luminescent agent can be narrowband (light with an emission with a full width at half maximum of 25 nm) or broadband (full width at half maximum of more than 25 nm).In a preferred development of the present invention, the at least one luminescence means can be designed to luminescence in the visible spectral range by excitation with UV radiation. This allows the pattern to be displayed without illumination with electromagnetic radiation in the visible spectral range. In principle, excitation with IR radiation is also possible. In this case, luminescence with anti-Stokes shift would have to be present so that it lies in the visible spectral range. The pattern illuminates in an environment dark to the human eye, for example brilliantly in a multi-coloured representation, it preferably appearing with the same colour distribution as the pattern formed with the absorptive spectral filter means under illumination with white luminescent light.For example, the at least one luminescent agent can be used in the form of one or more printing inks or printing inks or in the form of luminescent substances or luminescent pigments in printing inks or printing inks. In addition to the luminescent substances or luminescent pigments, the at least one luminescent agent can contain further conventional constituents, for example solvents, binders, resins, fires and auxiliaries. The at least one luminescent agent can have a specific absorption or reflectance in the visible spectral range, i.e. be colored, or it can be colorless. In particular, it is preferred if the at least one luminescent agent is transparent or translucent in the manner of a glaze and in particular also colorless.It is further preferred that the at least one luminescent agent luminesces in broad band in the visible spectral range, i.e. in a spectral range of about 400 nm to about 750 nm. If the spectral distribution of luminescence is not uniform in this range, the emitted light is also colored, for example, slightly yellowish when higher energy (shorter wavelength) spectral components occur to a lesser extent, or greenish when lower energy (longer wavelength) and higher energy spectral components occur to a lesser extent. The luminescent agent, like the absorptive spectral filter agent, can be formed by a single luminescent substance, namely an organic or an inorganic substance, or by a mixture of several luminescent substances, namely organic and / or inorganic substances. Typical luminescent substances are specified, for example, in U.S. Pat. No. 3,474,027 A, DE 198 60 093 A and DE 10 2007 035 592 A1, the disclosure content of which is incorporated into the present application. These are rare earth-doped host grids, wherein materials doped in particular with terbium, cerium and / or europium, for example oxysulfides and oxynitrides, are used. The pigments formed thereby can additionally be coated with organic substances in order to increase the quantum yield of the luminescence. In principle, organic luminescent agents can also be used, such as rhodamine 6G or fluorescein.While a plurality of different absorptive spectral filter means may be used for forming a pattern, for example in order to produce a multicolour pattern, for producing the pattern preferably only a single luminescent means is used which preferably luminesces over a broad band in the entire visible spectral range or at least in a plurality of spectral ranges in the visible range. Thus, the luminescent means forms, to a certain extent, an illumination for the pattern formed with the absorptive spectral filter means.To produce the pattern with the at least one absorptive spectral filter agent and the at least one luminescent agent, a conventional printing method can be used, for example offset printing, letterset printing, flexography, a digital printing method, such as inkjet printing, intaglio printing and screen printing.At least one luminescent pattern formed with the at least one luminescent means and at least one absorptive pattern formed with the at least one absorptive spectral filter means are located directly lying one on top of the other in the same pattern plane by forming the same layer.In a variation which is not claimed, for example, the at least one luminescent agent can be formed under reduced pressure, for example over the entire surface, and individualization by means of the at least one absorptive spectral filter agent can be formed by inkjet printing ink in a pattern plane lying above it. The luminescent light can thus be absorbed in order to achieve a color impression different from the original color of the luminescent light, up to complete extinction in certain regions.The pattern forming the security feature of the invention may typically be formed from a plurality of pattern elements. Each of the pattern elements or at least a part of the pattern elements can be identified both under the normal lighting conditions and under the lighting conditions suitable for luminescence perception. Accordingly, according to a preferred development of the present invention, the pattern elements are formed by the at least one luminescence means and the at least one absorptive spectral filter means.In a particular embodiment of this development of the present invention, luminescent pattern elements are formed with the at least one luminescent means and absorptive pattern elements are formed with the at least one absorptive spectral filter means. The luminescent pattern elements and the absorptive pattern elements are preferably each substantially of the same size and are formed, for example printed, in registration with one another on in each case at least one surface of the product carrier or in each case at least one surface of a preliminary product. The luminescence pattern elements are accordingly situated one above the other and namely substantially exactly in register. Accordingly, material of the luminescent agent is also arranged above or below (in the vertical direction) the absorptive pattern elements, or the luminescent pattern elements are arranged and vice versa. Above or below regions outside the absorptive pattern elements, on the other hand, preferably no material of the luminescent agent or no luminescent pattern elements are arranged and vice versa.Alternatively, it is of course also possible for the at least one luminescent means to form one or more continuous (gapless) or interrupted layer / s, which also extend / s into regions outside the absorptive pattern elements. This layer / s can / can be formed in rastered fashion in individual image points (pixels) or not rastered (not resolved into image points). For producing this luminescent pattern layer / s, a usual printing method can be used, for example a planographic printing method such as the offset printing method. The at least one absorptive pattern layer containing the at least one absorptive spectral filter means can likewise be formed in rastered or un rastered fashion, for example using a planographic printing method, such as the offset printing method, or using a digital printing method, such as the inkjet printing method. The at least one luminescent pattern layer can preferably lie in one or more luminescent pattern planes which lie below one or more absorptive pattern planes in which the at least one absorptive pattern layer is formed. The reverse arrangement is also possible in principle. An absorptive pattern formed by the at least one absorptive pattern layer can be, for example, a serial number or a shadow image of the document holder.In yet another method variant, it is also possible, furthermore, to form in each case preferably different patterns with the at least one luminescent agent and the at least one absorptive spectral filter agent in different pattern planes, which are situated one above the other but not exactly over the other, wherein at least one luminescent pattern layer formed with the at least one luminescent agent forms a luminescent pattern representing, for example, a first item of information and at least one absorptive pattern layer formed with the at least one absorptive spectral filter agent forms an absorptive pattern representing, for example, a second item of information, which are arranged one above the other, i.e. are superimposed. In this case, too, the at least one luminescent pattern layer can preferably lie in one or more first pattern planes which are arranged below one or more second pattern planes in which the at least one absorptive pattern layer is formed. The reverse arrangement is also possible in principle. The luminescent pattern layer and / or the absorptive pattern layer can / can be produced by means of one of the printing methods specified above, for example by means of a planographic printing method, such as the offset printing method, or by means of a digital printing method, such as the inkjet printing method. A luminescent pattern formed by the at least one luminescent pattern layer can be, for example, a shadow image of the document holder, while an absorptive pattern formed by the at least one absorptive pattern layer can be, for example, a serial number, the name of the document holder, a wrap or another pattern.It is particularly preferred if the luminescent pattern elements and the absorptive pattern elements are each arranged on the same surface on or in the product and very particularly preferably directly in contact with one another, namely lying one on top of the other. The luminescent pattern elements may in this case be arranged on the absorptive pattern elements, i.e. the absorptive pattern elements lie between the luminescent pattern elements and the carrier on which the pattern elements are applied, or the absorptive pattern elements may be arranged on the luminescent pattern elements, i.e. the luminescent pattern elements lie between the absorptive pattern elements and the carrier. If the luminescent pattern elements and the absorptive pattern elements are formed in this case on the surface of a product layer which, after the formation thereof, is covered by a further product layer, and the stack formed is subsequently processed further under laminating conditions to form a laminate, so that the luminescent and absorptive pattern elements are finally located inside the laminate, the luminescent pattern elements and the absorptive pattern elements are generally fused to form a uniform layer under the conditions prevailing during lamination (in particular at elevated temperature, elevated pressure). In any case, the luminescent agents forming the luminescent pattern elements and the absorptive spectral filter agents forming the absorptive pattern elements diffuse into the sheet material of the product and form a common pattern element layer there. If the conditions required for this purpose are not sufficient for a recognizable diffusion, on the other hand, according to the invention, two different layers are not formed, namely a luminescent pattern element layer in which all luminescent pattern elements produced with luminescent means lie, and an absorptive pattern element layer in which all absorptive pattern elements produced with absorptive spectral filter means lie, which are arranged directly one on top of the other on the carrier material. In the preparation of the pattern elements, the luminescent pattern elements may be first applied to the substrate and the absorptive pattern elements may then be formed on the luminescent pattern elements. Alternatively, it is of course also possible to apply the absorptive pattern elements first to the carrier material and then to form the luminescent pattern elements on the absorptive pattern elements. The same applies to the case of non-rastered pattern layers.Alternatively to the above embodiment with two different layers on the same surface of a product layer, the luminescent pattern element layer and the absorptive pattern element layer may be arranged on different overlying surfaces (in different planes), for example on surfaces of different product layers, provided that the luminescent pattern element layer and the absorptive pattern element layer abut each other. For example, the luminescent agent can be formed as a reduced pressure on a first surface and the absorptive spectral filter agent can be formed individually by means of inkjet printing (inkjet printing) in an overlying plane (on a second surface).In all cases, for example when the at least one luminescent agent and the at least one absorptive spectral filter agent are present according to the invention in a single layer forming pattern elements, furthermore when the at least one luminescent agent do not form according to the invention luminescent pattern elements lying below on the carrier material and the at least one absorptive spectral filter agent form absorptive pattern elements lying above, furthermore when the at least one absorptive spectral filter agent do not form according to the invention inversely the absorptive pattern elements lying below on the carrier material and the luminescent pattern elements lying above at least one luminescent agent, and also in the cases of non-scanned pattern layers, i.e. formed in pattern elements, radiation incident on the pattern elements or the non-scanned pattern layers, namely light in the visible spectral range, becomes incident, The pattern is filtered by the absorptive pattern elements or the unscreened absorptive pattern layers, so that the pattern is perceptible under normal illumination conditions with visible light in the same way as under illumination conditions suitable for luminescence.Alternatively to the above noninventive embodiments, the pattern elements may be in a single pattern element layer containing both the at least one luminescent agent and the at least one absorptive spectral filter agent. For this purpose, the luminescent and absorptive spectral filter means used for forming the pattern elements can be contained in a common material which is applied to the carrier material, optionally again produced one above the other in a plurality of color separations. The same applies to the case of non-rastered pattern layers.According to the preferred embodiments explained above, the pattern formed with the at least one absorptive spectral filter means and the pattern formed with the at least one luminescent means are thus superimposed; they lie exactly over one another.In all of the embodiments explained above, the absorptive pattern can be individualizing, for example personalizing, for the valuable and / or security product and the luminescent pattern cannot be individualizing. Alternatively, the luminescence pattern can also be individualizing and the absorptive pattern can not be individualizing. Or both patterns are individualizing.The carrier material to which the at least one luminescent agent and the at least one absorptive spectral filter agent are applied is a component of the valuable and / or safety product. For example, it is a single carrier material layer which is gathered together with further carrier material layers to form a stack and is then connected to these further layers, for example in a laminating process, in order to form the value and / or security document. Alternatively, the carrier material can also be an already largely finished valuable and / or security product, on one surface of which the security feature is applied. Alternatively, the carrier material can be additionally coated with a protective lacquer after the application of the security feature, so that the security feature lies inside the finished product and is therefore not readily manipulatable by a third party.The valuable and / or security product can be formed from a polymer selected from a group comprising polycarbonate (PC), in particular bisphenol A polycarbonate, polyethylene terephthalate (PET), derivatives thereof, such as glycol-modified PET (PETG), polyethylene naphthalate (PEN), polyvinyl chloride (PVC), polyvinyl butyral (PVB), polymethyl methacrylate (PMMA), polyimide (PI), polyvinyl alcohol (PVA), polystyrene (PS), polyvinylphenol (PVP), polypropylene (PP), polyethylene (PE), thermoplastic elastomers (TPE), in particular thermoplastic polyurethane (TPU), acrylonitrile-butadiene-styrene copolymer (ABS) and derivatives thereof, and / or paper. In addition, the product can also be produced from a plurality of these materials. It preferably consists of PC or PC / TPU / PC. The polymers can be either unfilled or filled. In the latter case, they are preferably transparent or translucent. If the polymers are filled, they are opaque. The above data relate both to films to be joined to one another and to liquid formulations which are applied to a precursor, such as a protective lacquer. Preferably, the product is made from 3 to 12, preferably 4 to 10, films (including the support of the data transfer device). A laminate formed in this way can then be coated on one or both sides with a protective lacquer. Overlay plies formed in this way protect a security feature arranged underneath and / or impart the required abrasion resistance to the document. The security feature is preferably formed on one of the inner layers.The value and / or security document can have further security features, for example guilloches, microscript, holograms, kinegrams and the like, in addition to the security feature according to the invention. Furthermore, the document can also have electronic components, for example an RFID circuit with antenna and RFID microchip, electronic display elements, LEDs, touch-sensitive sensors and the like. The electronic components can be arranged hidden between two opaque layers of the document, for example.To explain the invention in more detail, the following figures serve. FIG. 1 shows a value and / or security document with a facial image of the document holder in a perspective view; FIG. 2 shows an arrangement for verifying the authenticity of the security document and / or security document of FIG. 1 under illumination conditions with light in the visible spectral range (a); under illumination conditions with UV light (b); FIG. 3 shows embodiments of the arrangement of absorptive and luminescent pattern elements in schematic sectional views: (a) with overlying luminescent pattern elements; (b) with overlying absorptive pattern elements; (c) with pattern elements which simultaneously contain at least one absorptive spectral filter means and at least one luminescent means; (d) like (c), but lying inside between two product layers; FIG. 4 shows a pattern element with an overlying luminescent pattern element in schematic sectional views for illustrating the ratios of light absorption or light reflection: (a) when viewed with light in the visible spectral range; (b) when viewed under luminescent conditions; FIG. 5 shows a pattern element with a luminescent pattern element lying below in schematic sectional views for illustrating the ratios of light absorption or light reflection: (a) when viewed with light in the visible spectral range; (b) when viewed under luminescent conditions; FIG. 6 shows two different pattern elements each having an overlying luminescent pattern element in schematic sectional views for illustrating the ratios of light absorption or light reflection: (a) when viewed with light in the visible spectral range; (b) when viewed under luminescent conditions; FIG. 7 shows an arrangement of an inkjet printer with five print heads and a product carrier with pattern elements in a schematic view; FIG. 8 shows the structure for inkjet printing of the absorptive spectral filter means and the luminescent means in a schematic illustration.In the figures, like reference numerals designate elements having the same function.The value and / or security document 100 shown in FIG. 1 is an ID card which has been produced, for example, by laminating a plurality of product layers made of polycarbonate. This ID card has on its top side 101 shown here, in fields 102, 103, 104, various details about the card holder, including a facial image of this card holder. These details represent personalization details. The facial image is a security feature 200 and represents a pattern 201 of pattern elements formed in a manner according to the invention from absorptive pattern elements 210 and luminescent pattern elements 220 (in a construction such as shown in FIG. 6 a). The facial image is formed by a printing method, for example an inkjet method. In order to be able to reproduce the facial image in color, a plurality of print separations have been created and printed one above the other (not shown). For example, the different print separations can be produced in one print pass in an inkjet printing process by means of the absorptive spectral filter means and the luminescent means required for this purpose, which are applied by corresponding print heads of the printer, successively on the same surface. For this purpose, the inkjet printer D can have, for example, in addition to the print heads for the colors for cyan (C), magenta (M), yellow (Y) and key (K), a further print head (L) with which the luminescent pattern elements are printed. A device suitable for this purpose is shown in FIG. 7. An advantage of this procedure is that no adjustment step is required and the production time is thus extraordinarily short. In order to protect the facial image and the remaining information about the document holder against forgery and / or corruption and / or copy, the upper side of the card has subsequently also been coated with an overlay layer made of an abrasion-resistant material, for example made of PET or a protective lacquer (not shown).For verification of the document 100, this document is illuminated on the one hand under conventional illumination with a substantially white light source VIS (FIG. 2 a). The facial image 200 appears colored under these lighting conditions and, of course, reproduces the image of the document holder. On the other hand, the ID card can also be examined under illumination conditions in which it is illuminated exclusively with UV excitation radiation, i.e. with the exception of luminescence, the illumination space is completely or at least largely dark. A UV light source UV is used for this purpose, which emits electromagnetic radiation at 365 nm, for example. Since the luminescent means is illuminated by the UV excitation radiation and thereby emits luminescent radiation, which is in turn filtered by the absorptive spectral filter means, the facial image also appears colored under these illumination conditions, namely luminescent (FIG. 2 b ).FIG. 3 shows a plurality of possibilities for forming the pattern elements 280 forming the pattern 201 which are formed by the at least one absorptive spectral filter means and the at least one luminescent means. The pattern consists of several pattern elements which together form the pattern perceived by the viewer. The individual pattern elements can be formed, for example printed, on a carrier 110 in different ways according to FIGS. 3a to 3d.According to FIG. 3 a, firstly absorptive pattern elements 210 formed by the at least one absorptive spectral filter means are formed in the form of an absorptive pattern element layer 240 on the carrier 110. Merely by way of example, the pattern elements 280 are shown spaced apart from one another in this and the following examples. It is of course also possible to produce the pattern elements at least partially also directly adjacent to one another and / or overlapping one another. With the at least one absorptive spectral filter means, conventional printing inks can be formed. In particular, multiple print separations with different printing colors may be generated and printed, which together result in the colored pattern, such as the facial image 200 of FIG. 1. Subsequently, luminescent pattern elements 220 formed by the at least one luminescent agent are produced on the absorptive pattern elements in the form of a luminescent pattern element layer 250. The luminescent agent can contain, for example, at least one luminescent substance, for example rhodamine 6G or fluorescein or a mixture of these substances. One of the printing inks can additionally have a luminescence, for example with a magenta color. The luminescent pattern elements are formed largely exactly in register on the absorptive pattern elements.The generated pattern 201 shows a colored representation both when illuminated with visible light (VIS) and when excited with UV light (UV).According to FIG. 3 b, first of all luminescence pattern elements 220 formed by the at least one luminescence means are produced in the form of a luminescence pattern element layer 250 on the carrier 110. Absorptive pattern elements 210 in the form of an absorptive pattern element layer 240 are then formed on the luminescent pattern elements. The absorptive pattern elements are also formed largely accurately in register on the luminescent pattern elements. With regard to the structure of the pattern elements 280 from absorptive and luminescent pattern elements and the selection of the luminescent means and absorptive spectral filter means, reference is made to the example of FIG. 3 a.The generated pattern 201 shows a colored representation both when illuminated with visible light (VIS) and when excited with UV light (UV).According to FIG. 3 c, pattern elements 280 in the form of combination pattern elements 230 are formed on a carrier 110, which form a pattern element layer 260 and which are formed by both the at least one luminescent means and the at least one absorptive spectral filter means. With regard to the selection of the luminescent and absorptive spectral filter means, reference is made to the example of FIG. 3a. The pattern elements are also produced in several color separations in this case. For this purpose, colour material is used which in each case contains at least one luminescent agent and, depending on the colour separation, one of a plurality of absorptive spectral filter agents.The generated pattern 201 shows a colored representation both when illuminated with visible light (VIS) and when excited with UV light (UV).A single pattern element layer 260 made of pattern elements 280 is also obtained, for example, if absorptive pattern element layers 240 and luminescent pattern element layers 250 (as according to FIGS. 3a and 3b) are formed in each case on a product layer 110, and this product layer is then combined with a further product layer 110' and further processed to form a laminate under the action of elevated temperature and elevated pressure. In this case, the luminescent agents and absorptive spectral filter agents diffuse into the adjacent product layers 110, 110', so that a single pattern element layer 260 is formed (FIG. 3d).FIG. 4 shows the relationships when irradiated with white light (VIS) (FIG. 4 a) and with UV radiation (UV), for example with narrowband radiation at 312 nm (FIG. 4 b). The visible light is symbolized by the primary colors blue (b), green (g) and red (r). These color components pass through the top luminescent pattern element 220 without being absorbed by it or scattered to any appreciable extent. For this purpose, the at least one luminescent agent which forms this luminescent pattern element is completely radiation-transmissive in the visible spectral range and, in addition, non-scattering, therefore transparent and colorless. The absorptive pattern element 210 located below the luminescent pattern element has a red and a green absorption and therefore appears blue to the human eye. For this reason, the red (r) and green (g) portions of the incident light are absorbed in the absorptive pattern element 210, while the blue (b) portion passes through the absorptive pattern element. By emitting this light component, the pattern element 280 therefore appears blue.FIG. 4 b shows the relationships when illuminated exclusively with UV light (UV). The UV radiation entering the pattern element 280 generates in the upper luminescent pattern element 220 approximately white luminescent light with the color components blue (b), green (g) and red (r). This radiation is emitted omnidirectionally and passes into the underlying absorptive pattern element 210 where it is filtered: the red portion (r) and the green portion (g) are absorbed in the absorptive pattern element while the blue portion (b) passes through. As a result, this pattern element appears blue-luminous as a result of the UV excitation.The same conditions also result with an underlying luminescent pattern element 220 and an overlying absorptive pattern element 210, which respectively form a luminescent pattern element layer 250 and an absorptive pattern element layer 240 (FIG. 5 ). In this case, when illuminated with visible light (VIS) (FIG. 5 a), the red component (r) and the green component (g) are already absorbed in the above Absorptiv pattern element, so that the pattern element 280 appears blue overall. When illuminated with UV (UV) radiation (FIG. 5 b), it passes through the absorptive pattern element. For this purpose, it is of course necessary for it to be transparent to the UV radiation and not to be scattered as much as possible. In the luminescence pattern element, luminescence radiation visible over a broad band is generated with a blue component (b), a green component (g) and a red component (r). Only the blue component of this radiation can pass through the above absorptive pattern element, since the green component and the red component are filtered out by the absorptive pattern element.In FIG. 6, the relationships with two different pattern elements 280, 280' which differ with regard to the spectral absorption of the absorptive pattern element 210, 210' are also shown. The luminescent pattern elements 220 are respectively located on the bottom and the absorptive pattern elements 210, 210' are located on the top. The luminescent pattern elements together form a luminescent pattern element layer 250, and the absorptive pattern elements together form an absorptive pattern element layer 240. The respective upper left pattern element 280 has an absorptive pattern element 210 which absorbs the red component (r) and the green component (g) of visible radiation (VIS) and appears blue (b), and the respective right pattern element 280' has an absorptive pattern element 210' which absorbs the blue component (b) and the green component (g), so that this pattern element 280' appears red (r). This construction corresponds to that shown in FIG. 5.In FIG. 6 a, the situation is shown when illuminating and viewing the pattern with visible light (VIS) and in FIG. 6 b with UV excitation radiation (UV). Of the visible radiation, only the blue component (b) is remitted in the left pattern element 280, while this is the red component (r) in the right pattern element 280'. Therefore, the left pattern element is perceived blue under visible light illumination and the right pattern element red. Under UV irradiation, a corresponding image results: the red portion (r) and the green portion (g) of the luminescent light are absorbed in the upper left absorptive pattern element 210, so that only the blue portion (b) of the luminescent light is emitted by the left pattern element 280, while the blue portion (b) and the green portion (g) of the luminescent light are absorbed in the upper right absorptive pattern element 210', and only the red portion (r) of the luminescent light is emitted by the right pattern element 280'. Therefore, the pattern 201 produced by luminescence looks substantially the same as that obtained under visible light irradiation.In a further exemplary embodiment according to the invention, a luminescent layer with a luminescent agent and an absorptive layer with an absorptive spectral filter agent are formed by printing these directly one above the other on the same surface of a polymer film. The luminescent agent fluoresces approximately white when excited with UV radiation. The two layers are produced by inkjet printing. The absorptive layer is formed on the luminescent layer printed first. In FIGS. 8A, 8B, 8C, and 8D, different examples are given. In each case above (I) luminescence patterns formed with luminescent agent and below (II) with absorptive spectral filter agent are shown. At the very bottom (III), the patterns printed one above the other to form an overall pattern are shown.According to the example of Fig. 8A, the document owner's first name and date in the luminescent color and its face image are printed with a conventional ink containing absorptive spectral filter means. Together, this results in the document holder's first name and date being superimposed on its face image, the first name and date only becoming visible when the display is irradiated with the UV radiation. In the areas of the first name and the date that are not overlaid by the face image, they appear with the original luminescent color of the luminescent agent, namely approximately white. In the areas overlaid by the face image, the first name and date also appear with the color of the face image under luminescent lighting conditions.According to the example of Fig. 8B, a full area panel of the luminescent ink and the face image of the document holder are printed with a conventional ink containing an absorptive spectral filter means. Together, this results in the field being overlaid with the face image of the document holder, the field only becoming visible when the representation is irradiated with the UV radiation. In the areas of the field which are not overlaid by the face image, it appears with the original luminescent color of the luminescent agent, namely approximately white. In the areas overlaid by the face image, the field appears with the color of the face image under luminescent illumination conditions.According to the example of FIG. 8C, the face image of the document holder in the luminescent color and its face image are also printed with a conventional printing color, which contains an absorptive spectral filter means, in register with one another. Together, the face image of the document holder appears in natural color distribution when illuminated with visible vision and likewise in natural color distribution when illuminated with UV radiation.According to the example of Fig. 8D, a line pattern in the luminescent ink and the face image of the document holder are printed with a conventional ink containing absorptive spectral filter means. Together, this results in the bar pattern being superimposed on the face image of the document holder, the bar pattern only becoming visible when the representation is irradiated with the UV radiation. In the areas of the line pattern which are not overlaid by the face image, this appears with the original luminescent color of the luminescent agent, namely approximately white. In the areas overlaid by the face image, the bar pattern appears with the color of the face image under luminescent illumination conditions.The luminescent layer in the examples of FIG. 8 may be embodied either in rastered or in non-rastered printing. This print can also be produced using a planographic printing method, such as the offset printing method. Likewise, in these examples, the absorptive layer may be either rastered or non-rastered. Preferably, at least the absorptive pattern is produced by a digital printing method, such as an inkjet method, in order to utilize its flexibility for personalizing patterns.

Claims

Security feature (200) containing at least one luminescent agent on and / or in a product carrier (110, 110'), wherein the security feature (200) further contains at least one absorptive spectral filter agent in and / or on the product carrier (110, 110') for luminescent radiation emanating from the at least one luminescent agent, wherein at least one luminescent pattern formed with the at least one luminescent agent and at least one absorptive pattern formed with the at least one absorptive spectral filter agent form a single layer, so that the pattern elements (280, 280') in a pattern element layer (240; 250; containing both the at least one luminescent agent and the at least one absorptive spectral filter agent; 260), characterized in that the at least one absorptive spectral filter means is contained in at least one pattern (201) formed with printing inks according to the CMYK color space.Security feature (200) according to claim 1, characterised in that the at least one luminescence means is designed to luminescence in the visible spectral range by excitation with UV radiation (UV).Security feature (200) according to one of the preceding claims, characterized in that at least one of the at least one absorptive spectral filter means does not generate any luminescent radiation on irradiation.Security feature (200) according to one of the preceding claims, characterized in that the security feature (200) is formed by a pattern (201) having a plurality of pattern elements (280, 280'), and the pattern elements (280, 280') are formed by the at least one luminescence means and the at least one absorptive spectral filter means.Security feature (200) according to claim 4, characterised in that the luminescent pattern elements (220) formed by the at least one luminescent means and the absorptive pattern elements (210, 210') formed by the at least one absorptive spectral filter means are each substantially of the same size and are arranged in a registered manner with respect to one another.The security feature (200) according to claim 5, characterized in that the luminescent pattern elements (220) and the absorptive pattern elements (210, 210') are each arranged directly in contact with one another.Security feature (200) according to one of the preceding claims, characterized in that the luminescence pattern and the absorptive pattern are each individualizing for a value and / or security product formed therewith.Security feature (200) according to one of the preceding claims, characterized in that the luminescence pattern and the absorptive pattern are arranged lying exactly one above the other.Valuable and / or security product (100), having a product carrier (110, 110') and at least one security feature (200) according to one of Claims 1 to 8 arranged on or in the product carrier (110, 110').

Images