EP2903835B1 - Security feature and value product and/or security product containing the security feature - Google Patents

Description

The present invention relates to a security feature, a value and / or security product containing this security feature, in particular a security and / or security document, as well as a production method for the security and / or security product. Such a value and / or security document may be, for example, a passport, identity card, driver's license or another ID card or a means of payment, in particular a banknote. For example, in the case of an identity card, its front bears the photograph and the name of the holder. Such documents are typically produced in standardized formats, for example in the ID 1, ID 2 or ID 3 format according to ISO 7810. The documents can basically consist of or contain an organic polymer or a ceramic material, paper, cardboard or metal. Cards and card-shaped components of book-type documents may preferably be made of laminated polymer films.

The security features used in the security and / or security documents can only serve to prove the authenticity of the products regardless of their nature or by their user. Such security features are, for example, mottled fibers, guilloches, the special paper of banknotes and the like. Personalizing, for example, personalizing security features also contain in coded form or in plain text information about the type of document, the user of this document or an object to which the document is uniquely assigned. Such information may be a user's face photo, personal information such as name, birthday, birthplace, signature, or a personal identifier, such as a membership number. Another security feature that individualizes the document may be, for example, a serial number of the document.

Out DE 10 2007 018 450 A1 a laminated security document is known, which is in the form of a document composite having at least one inner layer and at least two overlay foils 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 printing technology. This will be in DE 199 06 388 A1 pointed. This document relates to a method and apparatus for personalizing and verifying such documents.

A security and / or value document with an individualizing security feature is, for example, in DE 10 2008 012 423 A1 specified. This document is designed as a polymer layer composite, which is produced by lamination of several substrate layers and in which at least one individualizing information is stored by printing technology. The information is decomposed in the composite into at least two print separations, each comprising a part of the information. The at least two pressure separations are arranged in at least two spaced-apart planes. In an embodiment specified in this document, it is provided that a printed image embodied by the information is decomposed into pixels and each pixel is assigned to exactly one of the at least two print separations. For example, the print can reproduce a facial image. To produce the document, the print separations are printed on the substrate layers. After lamination of the printed substrate layers, the printed surfaces are inside the document. In a further embodiment, luminescence means can be applied to a substrate layer surface arranged below the pressure separations so that white light is radiated flat in the case of UV excitation. The light is filtered by the pixels of the above arranged pressure separations, so that the information is preferably to recognize color in a vertical plan view.

It is also known to produce a blackening by laser engraving in a radiation-sensitive layer, for example in the form of a portrait photograph of a cardholder, a signature or the like ( EP 0 975 148 A1 ). In this way, security features can be generated by laser engraving, for example also in a layer lying inside a multilayer laminated carrier material (FIG. DE 199 07 940 A1 ). However, only blackening is formed by the laser engraving, so that the produced individualizing security feature only arises in a black and white representation.

document WO 2007/005354 A2 discloses a security feature according to the preamble of claim 1.

However, there is a constant need for novel, in particular individualizing, for example, personalizing, security features that are against counterfeiting and / or Falsification and / or copy are secured and which are easily recognizable for the assignment of the information encoded therewith to the user and / or the subject of a person. For example, the security feature should be located in a secure counterfeiting and / or falsification and / or copy of the inner product layer. Alternatively, the security feature can also be used to secure a personalization on an outer product layer. The present invention is also an essential further object to provide a cost-effective, easy and quick to implement security feature.

Insofar as the term "value and / or security product" and in particular the term "value and / or security document" are mentioned in the description and in the claims of the present application, this includes, for example, a passport, identity card, driver's license or another ID card. A card or an access control card, a vehicle registration document, vehicle registration document, visa, check, means of payment, in particular a banknote, a check, bank, credit or cash card, customer card, health card, chip card, a company card, proof of entitlement, membership card, gift or purchase voucher, Bill of lading or other proof of entitlement, tax stamp, postage stamp, ticket, token (token), adhesive label (for example, for product security) or any other ID document. The product may be, for example, a smart card. The security and / or value document may be in ID 1, ID 2, ID 3, or any other format, such as a booklet form, such as a passport-like item. A security and / or value product is generally a laminate of several document layers, which are connected register-accurate under heat and under increased pressure. These products should 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. The term "value and / or security product" includes, in addition to security and / or security documents, patches, labels and the like which are or are inseparably connected as security elements of the documents and for this purpose with the document carrier and form the security feature there.

As far as in the description and in the claims of the present application, the term 'security feature' is called, it is understood according to the present invention, the totality of optically active substances, namely the at least one luminescent agent and the at least one absorptive spectral filter means, in a relative arrangement to each other, so that a visually perceptible pattern is formed. The security feature can be produced as part of a value and / or security document or as a separate product (security element) that is permanently connected to a value and / or security document, such as a patch, label or the like. This can be glued, for example, on the document, which can be used as an adhesive and a paint. The security feature will generally only occupy part of the surface of the document.

As far as in the description and in the claims of the present application, the term, luminescence 'is called, it is to be understood as fluorescence, phosphorescence both with Stokes and anti-Stokes shift. According to the present invention, this is preferably to be understood as photoluminescence. Furthermore, the luminescence may, for example, also be electroluminescence.

As used in the specification and claims of the present application, the term 'pattern' is to be understood as meaning a somewhat distributed distribution of visible elements, preferably in a two-dimensional arrangement, which produce a self-contained representation, for example an image, picture element , Characters, in particular an alphanumeric character, a symbol, coat of arms, a formula or the like.

As far as in the description and in the claims of the present application, the term 'pattern element' is called, it is to be understood as a constituent part of a pattern. A pattern element serves as the smallest structural element for forming the pattern, with all pattern elements forming the pattern. The patterning material may be either transparent, translucent or opaque. Furthermore, it may have a certain brightness (absorption, remission), ie it may, for example, have blackening, gray tinting or whitening, and / or it may have a (spectral) coloring and, in turn, a certain brightness. The pattern elements may have a circular (dot-shaped), rectangular, square, hexagonal or other shape. Pattern elements can be the smallest elements of a perceptible representation to which one of the color values or color tones can be assigned in each case in a colorful 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 of a plurality of primary colors of the color space is formed the respective hue of the pattern element.

The object underlying the present invention is achieved by the security feature according to the invention according to claim 1. The security feature includes 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 means for emanating from the at least one luminescent luminescence , Also, the at least one absorptive spectral filter means may be located on one of the product carrier surfaces, in particular one of the inner surfaces.

The at least one absorptive spectral filter means forms a security feature visible to the naked eye, for example the portrait image of a person, in particular of the document holder. The security feature may be formed, for example, by a multi-colored representation of any pattern. Due to their optical absorption properties in the visible spectral range, the spectral filter means have a filtering effect on the luminescence radiation emanating from the at least one luminescence medium. As a result, the facial image does not only appear colorful under normal illumination with, for example, white light (with spectral broadband radiation in the visible range), i. with more than two shades (with different color impressions, not solely due to differences in brightness), but also under lighting conditions under which luminescence is normally observed, i. without illumination with visible light, but only 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 that only appears multicolored when illuminated with light in the visible spectral range. In order to increase the security of such documents against counterfeiting and / or falsification and / or copying, a single-color shadow image with luminescent color in the visible spectral range which can be excited by means of UV radiation could, in principle, also be produced. The introduction of RGB shadows is known and commercially available. However, due to the inks used, often only an introduction into paper documents is possible. For the safe introduction of personalization information into a highly secure document body, which For example, made of polycarbonate, there are currently limited inks and printers available. In particular, it is desirable to limit the number of printheads needed. In addition, the color management in the generation of an RGB-shadow image is in principle difficult, since by slightly different excitation, which results for example by the choice of different commercially available UV lamps, often results in a different excitation of the three luminescent substances, so that the image generated in each case a little produced another color impression.

By means of the luminescence of the at least one excited luminescence medium and the spectral filtering of the luminescent light emanating therefrom in the visible spectral range by means of the at least one absorptive spectral filter means forming the pattern, a desired multicolor pattern according to the present invention can also be rendered multicolored under the verification conditions for luminescent security features. Therefore, it is not necessary to form the (objective) luminescence pattern for generating the luminescent pattern image from luminescent (basic) colors suitable for this purpose by, for example, printing separations with suitable luminescent colorants in each case one (basic) color (for example, red, green and blue according to the RGB color space) and the luminescence pattern is then formed by color mixing from the luminescent print separations. Rather, the luminescent pattern image already results with the aid of the visible under conventional illumination conditions with visible light design of a template, in particular a print template. For this purpose, it is completely sufficient to filter out the emanating from the luminescent radiation by means of colorants, such as printing inks, so that when viewed in the visible spectral multi-color pattern appears even under luminescence illumination conditions (ie without illumination with visible to the human eye radiation) essentially the same color distribution appears multicolored, ie: with natural color distribution. A possible color cast is compensated by the human eye and still perceived as white.

Of course, a pattern executed under conventional illumination in the visible spectral range only in monochrome or black-and-white or in shades of gray will also appear only monochrome or black-and-white or in shades of gray under luminescence viewing. Therefore, the present invention extends to both monochrome, black and white and shades of gray appearing renderings of a pattern as well as the above-explained multicolor (for example, two-, three- or multi-color) pattern reproduction. Thus, a pattern under luminescent illumination conditions will then appear to have virtually the same color / black / white / gray distribution as under conventional conditions with visible light illumination. Therefore, with the security feature according to the invention instead of a colorful, ie more than two colors, pattern also monochrome or black / white or formed in shades of gray pattern can be displayed.

If the luminescence radiation in the visible spectral range is very broadband, practically white luminescent light can be generated (apart from a slight color cast, if appropriate). This is achieved by additive color mixing by a plurality of broadband emitting luminescent agents, but also with a plurality of narrow-band luminescent luminescent agents or with a mixture of narrow-band and broadband luminescent luminescent agents. In this case, the luminescent radiation filtered by the absorptive spectral filter means and incident on the observer eye appears with the same color as the at least one spectral filter means under normal illumination conditions in the visible spectral range. If the luminescent radiation is not white but is colored, for example because certain spectral components are proportionally stronger than others, the security feature is reproduced with a corresponding color cast. Since the human eye adapts to different color temperatures, however, such a color cast without any possibility of comparison is barely perceived. Of course, the at least one spectral filter means can not filter out luminescence radiation by filtering, which is not already present. Therefore, the pattern reproduction in the areas whose color of the spectral filter material is in a spectral range in which no luminescent radiation is emitted will appear dark.

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 on at least one of the surfaces of Cartridge or precursor applied. 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 phosphor and / or the at least one absorptive spectral filter means is / are arranged in the inside of the value and / or security document in one or more pattern levels.

For verification of the 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) illuminates the security feature of the product with visible light and views the security feature; this includes either an immediate consideration by humans or a machine observation by means of suitable devices and image evaluation systems; and (c) illuminating the security feature of the product with the excitation radiation for the at least one luminescent agent and viewing the security feature in the form of luminescent light emitted in the visible spectral region; The latter step also includes either an immediate consideration by humans or a machine observation by means of suitable devices and image evaluation systems. The steps b) and c) are preferably carried out successively. However, step b) is not absolutely necessary, since verification is also possible by detecting the security feature solely via the filtering according to the invention of the luminescent light emanating from the at least one luminescent agent by means of a pattern formed by the spectral filter means. 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 the excitation of the at least one luminescent agent, for example a UV light source. Furthermore, a suitable optics, recording and evaluation systems can be provided. The verification can be considered successful if the security feature forming pattern appears not only in the visible light spectrum but also under luminescent lighting conditions (or at least under luminescent lighting conditions) and optionally also if the two pattern reproductions are identical and with a given appearance be reproduced.

The at least one absorptive spectral filter means may be present in particular in the form of colors predetermined in accordance with the CMYK color space, for example in the form of printing inks with which print separations are produced, the print separations being composed to form a particularly colored pattern. For this purpose, color separations in the basic colors C (cyan) M (magenta) Y (yellow) and K (key = black content) are generally prepared and these color separations are superposed on the pattern, preferably on the same surface on or in the product, most preferably directly above each other, ie in contact with each other.

For example, the at least one absorptive spectral filter agent can be used by one or more printing inks or printing inks or colorants in the form of dyes or pigments in printing inks or printing inks. The absorptive spectral filter means may be either a single colorant having a given absorption and reflectance spectrum or a mixture of a plurality of colorants, each having an individual absorption and reflectance spectrum and having in the mixture a different absorption and reflectance spectrum than the individual colorants subtractive results from the spectra of the individual colorants. The absorptive spectral filter means may 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 means may contain other conventional ingredients, for example, solvents, binders, resins, varnishes, and adjuvants, 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 at least partially transparent to the excitation radiation for the at least one luminescent agent.

For example, the face image of the document holder can be printed in color by means of suitable printing inks, for example in a plurality of color separations, which can be formed, for example, in a pattern plane or in a plurality of pattern planes. Due to their optical absorption properties in the visible spectral range, these printing inks act on the luminescence radiation emanating from the at least one luminescence medium. By combining the optical filter characteristics of the at least one absorptive spectral filter means, which has little or no luminescence under excitation conditions for the luminescent agents, with the at least one luminescent agent having strong luminescence under the luminescent illumination conditions, a pattern is perceptible under the luminescence illumination conditions that appears like the pattern perceptible under normal viewing.

In one possible development of the present invention, the absorptive spectral filter means do not luminesce even when excited by electromagnetic radiation. However, it may be advantageous to include at least one or more of the absorptive spectral filter means, if desired also all to be selected such that they luminesce / luminesce under the excitation conditions for the at least one luminescent agent in the visible spectral range, each with a suitable color (ie with a spectral distribution of the luminescent radiation at least similar to that of the light remission of the absorptive spectral filter means is), because even when viewing the pattern under normal lighting conditions a more brilliant representation is achieved, for example, when playing a portrait image of a person whose skin color with a more natural appearance. In addition, this also spectral components of the pattern can be supplemented, in which the luminescent hardly or hardly luminescent. For example, the magenta color separation of the pattern can preferably be generated with a spectral filter means which additionally luminesces in consideration of the color shift in the luminescence. Thus, at least one of the at least one absorptive spectral filter means according to this preferred embodiment of the present invention does not generate luminescent radiation upon excitation, while at least one further absorptive spectral filter means luminesces under the excitation conditions for the at least one luminescent agent in the visible spectral range. This additional property may be achieved by including in the absorptive spectral filter means, in addition to one or more colorants, one or more brighteners that luminesce due to the excitation with electromagnetic radiation, or by being formed by one or more colorants also has luminescent properties for the absorptive substances.

In a preferred embodiment of the present invention, the excitation radiation used to excite the luminescent agent can be narrow-band (light with an emission with a half-width of at most 25 nm) or broad-band (half-value width of more than 25 nm).

In a preferred development of the present invention, the at least one luminescence agent can be designed to luminesce by excitation with UV radiation in the visible spectral range. Thus, a representation of the pattern without illumination with electromagnetic radiation in the visible spectral range is possible. In principle, an excitation with IR radiation is possible. In this case, luminescence with anti-Stokes shift would have to be present so that it lies in the visible spectral range. For example, in a dark environment for the human eye, the pattern shines brilliantly in a multi-color representation, preferably under illumination with white luminescent light the same color distribution appears as the pattern formed with the absorptive spectral filter means.

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 may contain further conventional constituents, for example solvents, binders, resins, varnishes and auxiliaries. The at least one luminescent agent may have a specific absorption or remission in the visible spectral region, i. be colored, or it may 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 broadband in the visible spectral range, ie in a spectral range from about 400 nm to about 750 nm. If the spectral distribution of the luminescence in this range is not uniform, 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 means, can be formed by a single luminescent substance, namely an organic or an inorganic substance, or by a mixture of a plurality of luminescent substances, namely organic and / or inorganic substances. Typical luminescent substances are, for example, in US 3,474,027 A . DE 198 60 093 A and DE 10 2007 035 592 A1 , the disclosure of which is incorporated in the present application. It is rare earth-doped host lattice, in particular with terbium, cerium and / or europium doped substances, such as oxysulfides and oxynitrides, are used. The pigments formed herewith can additionally be coated with organic substances in order to increase the quantum yield of the luminescence. In principle, organic luminescent agents are also usable, such as rhodamine 6G or fluorescein.

While it is preferable to use a plurality of different absorptive spectral filter means to form a pattern, such as to create a multi-color pattern, only one luminescent agent may be used to form the pattern can be used, which preferably luminesces broadband in the entire visible spectral range or at least in several spectral regions in the visible range. Thus, the luminescent agent effectively forms an illumination for the pattern formed with the absorptive spectral filter means. If a plurality of luminescent agents are used, these can be located, in particular, in different surface areas of the valuable and / or security product.

To produce the pattern with the at least one absorptive spectral filter means and / or with the at least one luminescent agent, a conventional printing method can be used, for example offset printing, letter set printing, flexographic printing, a digital printing method, such as inkjet printing, intaglio printing and screen printing.

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 filter means may be located immediately adjacent to each other in different pattern planes or in the same pattern plane, forming the same layer in the latter case , Alternatively, the luminescence patterns may also be formed in at least one luminescent layer, which are spaced apart from the absorptive pattern in at least one absorptive layer. For example, there may be several pattern planes for the absorptive layers, which are also spaced from each other. For this purpose, the respective layers can be applied to different surfaces of different films, for example, in each case one surface of a plurality of films, which are then collected and laminated together. By way of example, the at least one luminescence medium may be formed under reduced pressure, for example over the entire surface, and individualized by means of the at least one absorptive spectral filter means by means of inkjet printing ink in an overlying pattern plane. Thus, the luminescent light can be absorbed to achieve a different color to the original color of the luminescent light color impression to complete extinction in certain areas.

The luminescent agent can be present over the entire area or preferably in the form of a pattern in a surface area of the valuable and / or security product occupied by the security feature. Likewise, the absorptive spectral filter means may be arranged in the area occupied by the security feature over the entire area or preferably in the form of a pattern. If both the luminescent agent and the spectral filter means are present in the form of patterns, namely in the form of the luminescence pattern or in the form of the absorptive pattern, these can preferably be arranged in register one above the other. If the luminescent agent is present over the whole area in the area of the security feature and the absorptive spectral filter means forms an absorptive pattern, the luminescent agent can form, for example, a backlighting of the absorptive pattern.

The pattern forming the security feature according to the invention can typically be formed from a multiplicity of pattern elements. Each of the pattern elements or at least a part of the pattern elements can be recognized both under the normal illumination conditions and under the lighting conditions suitable for luminescence perception. Accordingly, the pattern elements are formed according to a preferred embodiment of the present invention by the at least one luminescent agent 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 agent and absorptive pattern elements are formed with the at least one absorptive spectral filter medium. The luminescence pattern elements and the absorptive pattern elements are preferably of substantially the same size and are formed register-accurate to each other on at least one surface of the product carrier or at least one surface of an intermediate product, for example printed. The luminescence pattern elements are therefore one above the other and in fact substantially registration. Above or below (in the vertical direction) of the absorptive pattern elements is therefore also the material of the luminescent means or the luminescence pattern elements are arranged and vice versa. On the other hand, above or below areas outside the absorptive pattern elements, preferably, no material of the luminescence means or no luminescence pattern elements are arranged and vice versa. If the pattern elements are each arranged in a grid, the grid can be arranged in register with each other.

Alternatively, it is of course also possible that the at least one luminescent agent forms one or more continuous (gapless) or discontinuous layer (s) which also extend into regions outside the absorptive pattern elements. This layer (s) can be rasterized in individual pixels (pixels) or not rasterized (not resolved into pixels). For producing this luminescence pattern layer (s), a conventional one Printing methods are used, for example, a planographic printing process, such as the offset printing process. The at least one absorptive pattern layer containing the at least one absorptive spectral filter means can likewise be screened or unscreened, for example with a planographic printing process, such as the offset printing process, or with a digital printing process, such as the inkjet printing process. The at least one luminescent pattern layer may preferably be located in one or more luminescent pattern planes underlying 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 may be, for example, a serial number or a shadow image of the document holder.

In yet another variant of the method, it is also possible to form in each case preferably different patterns with the at least one luminescent agent and the at least one absorptive spectral filter means in different pattern planes, which are superimposed, but not one above the other, at least one with the at least one luminescent agent formed luminescent pattern layer, for example, a luminescence pattern representing a first information and at least one formed with the at least one absorptive spectral filter means absorptive pattern layer form, for example, a second information representing Absorptivmuster, which are superimposed, ie superimposed. Also in this case, the at least one luminescent pattern layer may 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 may be formed by any of the above printing methods, for example, a planographic printing method such as the offset printing method or a digital printing method such as the inkjet printing method. For example, a luminescent pattern formed by the at least one luminescent pattern layer may be a shadow image of the document holder, while an absorptive pattern formed by the at least one absorptive pattern layer may be, for example, a serial number, the name of the document holder, a crest, or other pattern. The above embodiments are also possible in variants in which the pattern is formed instead of by pattern elements in a (non-screened) not formed by pattern elements.

It is particularly preferred if the luminescence 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 one on top of the other. The luminescent pattern elements may in this case be arranged on the absorptive pattern elements, i. the absorptive pattern elements lie between the luminescent pattern elements and the support on which the pattern elements are applied, or the absorptive pattern elements may be disposed on the luminescent pattern elements, i. the luminescent pattern elements lie between the absorptive pattern elements and the carrier. If the luminescence pattern elements and the absorptive pattern elements are formed in this case on the surface of a product layer, which is covered by a further product layer after their formation, and the stack formed is then further processed under laminating conditions into a laminate, so that the luminescence and Absorptive pattern elements are finally in the laminate inside, the luminescent pattern elements and the absorptive pattern elements are fused under the conditions prevailing in the lamination conditions (especially at elevated temperature, elevated pressure) in general to a uniform layer. In any case, the luminescent means forming the luminescent pattern elements and the absorptive spectral filter means forming the absorptive pattern elements diffuse into the sheet material of the product and form a common pattern element layer there. On the other hand, if the conditions necessary for a detectable diffusion are not sufficient, two different layers, namely a luminescent pattern element layer in which all luminescent luminescent pattern elements are located, and an absorptive pattern element layer in which all absorptive absorptive material generated by absorptive spectral filter means are formed. Pattern elements lie, formed, which are arranged directly one above the other on the carrier material. In fabricating the pattern elements, the luminescent pattern elements may first be applied to the substrate and the absorptive pattern elements then formed on the luminescent pattern elements. Of course, alternatively, the absorptive pattern elements may first be applied to the substrate and the luminescent pattern elements subsequently formed on the absorptive pattern elements. The above-mentioned embodiments also apply to the case of non-screened pattern layers.

As an alternative 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 formed on different superimposed surfaces (in different layers) Planes), for example on the two surfaces of the same product layer or on surfaces of different product layers. For example, the luminescent agent can be formed as a negative pressure on a first surface and the absorptive spectral filter medium can be individualized by means of inkjet printing (inkjet printing) in an overlying plane (on a second surface). The above-mentioned embodiments are also possible in variants in which the pattern is formed instead of by pattern elements in a representation (not rastered) formed by pattern elements.

In all cases, for example, when the at least one luminescent agent and the at least one absorptive spectral filter means are present in a single pattern-forming layer, further, when the at least one luminescent agent luminescence pattern elements located on the substrate below and the at least one absorptive spectral filter means on top Absorptive pattern elements form, furthermore, if, conversely, the at least one absorptive spectral filter means on the support material below absorptive pattern elements and the at least one luminescent form luminescence pattern elements above, as well as in the cases not rasterized, ie non-patterned pattern layers, the radiation incident on the pattern elements or non-patterned pattern layers, namely light in the visible spectral region, is filtered by the absorptive or non-patterned absorptive pattern layers, so that the pattern is exposed to visible light under normal illumination conditions the same way as under under suitable lighting conditions for the luminescence.

As an alternative to the above embodiments, and most preferably, the pattern elements may be in a single pattern element layer containing both the at least one phosphor and the at least one spectral absorptive filter. For this purpose, the luminescent and absorptive spectral filter means used for the formation of the pattern elements may be contained in a common material which is applied to the carrier material, optionally in turn produced in several color separations one above the other. Therefore, the formed pattern element layer is homogeneous and not composed of two layers. Alternatively, the pattern element layer containing the at least one luminescent agent and the at least one absorptive spectral filter medium can also be formed by initially separately producing two adjacent layers and then fusing both layers together, in particular at elevated temperature, for example during lamination of the carrier layer with further layers. The above-mentioned embodiments also apply to the case of non-screened pattern layers of luminescent and absorptive spectral filter means.

According to the preferred embodiments explained above, therefore, the pattern formed with the at least one absorptive spectral filter means and the pattern formed with the at least one luminous means are superimposed; they are in registration and at least register exactly one above the other.

In all embodiments of the present invention explained above, the absorptive pattern can be individualizing, for example personalizing, for the value and / or security product and not individualizing the luminescence pattern. Alternatively, the luminescence pattern can also be individualizing and the absorptive pattern can not be individualizing. In a particularly preferred embodiment, both patterns are individualizing. Alternatively, both patterns may not be individualizing.

The carrier material to which the at least one luminescent agent and the at least one absorptive spectral filter agent are applied is part of the valuable and / or security product. For example, it is a single carrier material layer which is collated with further carrier material layers in a stack and then connected to these other layers, for example in a lamination process to form the security and / or security document. Alternatively, the carrier material can also be an already largely finished value and / or security product, on the one or both surfaces of which the security feature is applied. Alternatively, after the security feature has been applied, the carrier material may additionally be coated with a protective lacquer so that the security feature lies inside the finished product and thus can not be easily manipulated by a third party.

The valuable and / or security product may 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), polymethylmethacrylate (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 made of several of these materials. It preferably consists of PC or PC / TPU / PC. The polymers may 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 information relates both to films to be bonded together and to liquid formulations applied to a precursor, such as a resist. Preferably, the product is made from 3 to 12, preferably 4 to 10, films (including the carrier of the data transmission device). A laminate formed in this way can finally be coated on one or both sides with a protective lacquer. Overlay layers formed in this way protect a security feature arranged underneath and / or give the document the required abrasion resistance. The security feature is preferably formed on one of the inner layers.

The security and / or security document can have, in addition to the security feature according to the invention, further security features, such as guilloches, micro-writing, holograms, kinegrams and the like. Furthermore, the document may also comprise electronic components, for example an RFID circuit with antenna and RFID microchip, electronic display elements, LEDs, touch-sensitive sensors and the like. For example, the electronic components may be hidden between two opaque layers of the document.

Fig. 1

zeigt ein Wert- und/oder Sicherheitsdokument mit einem Gesichtsbild des Dokumenteninhabers in einer perspektivischen Ansicht;

Fig. 2

zeigt eine Anordnung zur Verifikation der Echtheit des Wert- und/oder Sicherheitsdokuments von Fig. 1 unter Beleuchtungsbedingungen mit Licht im sichtbaren Spektralbereich (a); unter Beleuchtungsbedingungen mit UV-Licht (b);

Fig. 3

zeigt Ausführungsformen der Anordnung von Absorptiv- und LumineszenzMusterelementen in schematischen Schnittansichten: (a) mit obenliegenden Lumineszenz-Musterelementen; (b) mit obenliegenden Absorptiv-Musterelementen; (c) mit Musterelementen, die zugleich mindestens ein absorptives Spektralfiltermittel und mindestens ein Lumineszenzmittel enthalten; (d) wie (c), allerdings innenliegend zwischen zwei Produktlagen;

Fig. 4

zeigt ein Musterelement mit einem obenliegenden Lumineszenz-Musterelement in schematischen Schnittansichten zur Veranschaulichung der Verhältnisse der Lichtabsorption bzw. -remission: (a) bei Betrachtung mit Licht im sichtbaren Spektralbereich; (b) bei Betrachtung unter Lumineszenzbedingungen;

Fig. 5

zeigt ein Musterelement mit einem untenliegenden Lumineszenz-Musterelement in schematischen Schnittansichten zur Veranschaulichung der Verhältnisse der Lichtabsorption bzw. -remission: (a) bei Betrachtung mit Licht im sichtbaren Spektralbereich; (b) bei Betrachtung unter Lumineszenzbedingungen;

Fig. 6

zeigt zwei verschiedene Musterelemente mit jeweils einem obenliegenden AbsorptivMusterelement in schematischen Schnittansichten zur Veranschaulichung der Verhältnisse der Lichtabsorption bzw. -remission: (a) bei Betrachtung mit Licht im sichtbaren Spektralbereich; (b) bei Betrachtung unter Lumineszenzbedingungen;

Fig. 7

zeigt eine Anordnung eines Inkjet-Druckers mit fünf Druckköpfen und einem Produktträger mit Musterelementen in einer schematischen Ansicht;

Fig. 8

zeigt den Aufbau für Inkjetdruck des absorptiven Spektralfiltermittels und des Lumineszenzmittels in einer schematischen Darstellung.

For a more detailed explanation of the invention serve below described figures.

Fig. 1

shows a value and / or security document with a face image of the document holder in a perspective view;

Fig. 2

shows an arrangement for verifying the authenticity of the value 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 overhead luminescent pattern elements; (b) with overhead absorptive pattern elements; (c) with pattern elements which simultaneously contain at least one absorptive spectral filter means and at least one luminescent agent; (d) as (c), but inside between two product layers;

Fig. 4

shows a pattern element with an overhead luminescent pattern element in schematic cross-sectional views to illustrate the ratios of light absorption or emission: (a) when viewed with light in the visible spectral range; (b) when viewed under luminescence conditions;

Fig. 5

shows a pattern element with a underlying luminescent pattern element in schematic cross-sectional views to illustrate the ratios of light absorption or emission: (a) when viewed with light in the visible spectral range; (b) when viewed under luminescence conditions;

Fig. 6

shows two different pattern elements, each with an overhead absorptive pattern element in schematic cross-sectional views to illustrate the ratios of light absorption or emission: (a) when viewed with light in the visible spectral range; (b) when viewed under luminescence conditions;

Fig. 7

shows an arrangement of an inkjet printer with five printheads 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 agent in a schematic representation.

In the figures, like reference numerals designate elements having the same function.

This in Fig. 1 Value and / or security document 100 shown is an ID card made, for example, by laminating multiple product layers of polycarbonate. This ID card has on its top 101 shown here in fields 102, 103, 104 various information about the cardholder, including a facial image of this cardholder on. The facial image is a security feature 200 and represents a pattern 201 of pattern elements formed in accordance with the invention from absorptive pattern elements 210 and luminescent pattern elements 220 (in a construction approximately as in FIG Fig. 6a shown) are formed. The facial image is formed by a printing method such as an inkjet method. In order to be able to play the face image in color, several print extracts have been created and printed on top of each other (not shown). For example, the various print separations in a printing pass in an inkjet printing process by means of the necessary absorptive spectral filtering means and the luminescent agent, which are applied by respective printheads of the printer, successively generated on the same surface. For this purpose, the inkjet printer D, for example, in addition to the printheads for the colors for cyan (C), magenta (M), yellow (Y) and key (K) have a further print head (L), with which the luminescence pattern elements are printed. A suitable device is in Fig. 7 shown. An advantage of this approach is that no adjustment step is needed and the manufacturing time is extremely short. Alternatively, the printer may also have only four printheads C, M, Y, K, each of the four inks being in the form of a respective absorptive spectral filter means having a luminescent agent L in admixture, all inks containing the same luminescent agent. In order to protect the facial image and the other information about the document holder against forgery and / or falsification and / or copy, the top of the card has subsequently been coated with an overlay layer of an abrasion resistant material, such as PET or a protective lacquer (not shown ).

For the verification of the document 100, it is illuminated on the one hand under usual illumination with a substantially white light source VIS ( Fig. 2a ). The face image 200 appears colored under these lighting conditions and of course reproduces the document owner's image. On the other hand, the ID card can also be examined under lighting conditions in which it is illuminated exclusively with UV excitation radiation, ie with the exception of the luminescence, the illumination space is completely or at least largely dark. For this purpose, a UV light source UV, for example, emits electromagnetic radiation at 365 nm. Since the luminescent agent is illuminated by the UV excitation radiation and thereby emits luminescence radiation, which in turn is filtered by the absorptive spectral filter means, the facial image also appears colored under these illumination conditions, namely luminescent ( Fig. 2b ).

• Gemäß Fig. 3a werden zunächst Absorptiv-Musterelemente 210, die durch das mindestens eine absorptive Spektralfiltermittel gebildet sind, in Form einer Absorptiv-Musterelementschicht 240 auf dem Träger 110 gebildet. Lediglich beispielhaft sind die Musterelemente 280 in diesem und den nachfolgenden Beispielen zueinander beabstandet dargestellt. Selbstverständlich ist es auch möglich, die Musterelemente zumindest zum Teil auch unmittelbar aneinander angrenzend und/oder einander überlappend zu erzeugen. Mit dem mindestens einen absorptiven Spektralfiltermittel können übliche Druckfarben gebildet werden. Es können insbesondere mehrere Druckauszüge mit unterschiedlichen Druckfarben erzeugt und gedruckt werden, die zusammen das farbige Muster, etwa das Gesichtsbild 200 von Fig. 1 ergeben. Auf den Absorptiv-Musterelementen werden danach Lumineszenz-Musterelemente 220, die durch das mindestens eine Lumineszenzmittel gebildet sind, in Form einer Lumineszenz-Musterelementschicht 250 erzeugt. Das Lumineszenzmittel kann beispielsweise mindestens einen Lumineszenzstoff, beispielsweise Rhodamin 6G oder Fluoreszein oder eine Mischung dieser Stoffe, enthalten. Eine der Druckfarben kann zusätzlich eine Lumineszenz beispielsweise mit einer Magenta-Farbe aufweisen. Die Lumineszenz-Musterelemente sind weitgehend passergenau auf den Absorptiv-Musterelementen gebildet.

In Fig. 3 For example, several ways of forming the pattern elements 280 forming the pattern 201 formed by the at least one spectral absorptive filter means and the at least one phosphor means are shown. The pattern consists of several pattern elements that together form the pattern perceived by the viewer. Instead of such a screened pattern this can also be formed not rasterized. The individual pattern elements can according to the Fig. 3a to 3d be formed in different ways on or in a carrier 110, for example printed on this:

• According to Fig. 3a First, absorptive pattern elements 210 formed by the at least one absorptive spectral filter means are in the form of an absorptive pattern element layer 240 formed on the carrier 110. For example only, the pattern elements 280 are shown spaced apart in this and the following examples. Of course, it is also possible to generate the pattern elements at least partially also directly adjacent to each other and / or overlapping each other. With the at least one absorptive spectral filter means conventional printing inks can be formed. In particular, a plurality of print separations with different printing inks can be produced and printed, which together form the colored pattern, for example the face image 200 of FIG Fig. 1 result. Afterwards, luminescence pattern elements 220, which are formed by the at least one luminescence medium, are produced in the form of a luminescence pattern element layer 250 on the absorptive pattern elements. The luminescent agent may 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 may additionally have a luminescence, for example with a magenta color. The luminescence pattern elements are formed largely registration 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. 3b At first, luminescence pattern elements 220, which are formed by the at least one luminescence agent, are generated 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 subsequently formed on the luminescence pattern elements. The absorptive pattern elements are also largely formed register-accurate on the luminescence pattern elements. With regard to the structure of the pattern elements 280 of 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 Fig. 3a Referenced.

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. 3c For example, 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 both by the at least one luminescence medium and the at least one absorptive spectral filter means. With regard to the selection of the luminescent and absorptive spectral filter means on the example of Fig. 3a Referenced. The pattern elements are also generated in this case in several color separations. For this purpose, color material is used which contains in each case at least one luminescent agent and, depending on the color separation, one of a plurality of absorptive spectral filter means.

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 of pattern elements 280 is obtained, for example, even if absorptive pattern element layers 240 and luminescence pattern element layers 250 (as shown in FIG Fig. 3a or 3b ) are formed and this product layer then combined with a further product layer 110 'and further processed under the action of elevated temperature and elevated pressure to form a laminate. In this case, the luminescent means and absorptive spectral filter means diffuse into the adjacent product layers 110, 110 'and into each other, respectively, so that a single pattern element layer 260 of combined luminescent and absorptive pattern elements is formed ( Fig. 3d ).

In Fig. 4 are the conditions when irradiated with white light (VIS) ( Fig. 4a ) and with UV radiation (UV), for example with narrow-band radiation at 312 nm, ( Fig. 4b ). The visible light is symbolized by the basic colors blue (b), green (g) and red (r). These color components pass through the overhead luminescent pattern element 220 without being absorbed by or scattered to any significant extent. For this purpose, the at least one luminescent agent which forms this luminescence pattern element is completely or at least substantially radiation-transparent in the visible spectral range and also preferably non-scattering, therefore transparent (or optionally translucent) and colorless (or only slightly colored). That is in Fig. 4a 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 portion (r) and the green portion (g) of the incident light are absorbed in the absorptive pattern element 210 while the blue portion (b) passes through the absorptive pattern element and is remitted. By remission of this proportion of light, the pattern element 280 therefore appears blue.

In Fig. 4b the conditions are reflected in a lighting exclusively with UV light (UV). The UV radiation entering the pattern element 280 produces in the overhead luminescence pattern element 220 approximately white luminescent light with the color components blue (b), green (g) and red (r). This radiation is emitted non-directionally and enters the underlying absorptive pattern element 210 where it is filtered: the red portion (r) and green portion (g) are absorbed in the absorptive pattern member while the blue portion (b) passes and is remitted , As a result, this pattern element appears blue due to the UV excitation.

The same conditions also arise with an underlying luminescence pattern element 220 and an overhead absorptive pattern element 210, which respectively form a luminescence pattern element layer 250 and an absorptive pattern element layer 240 ( Fig. 5 ). For visible light illumination (VIS) ( Fig. 5a In this case, the red component (r) and the green component (g) are already absorbed in the above absorptive pattern element, so that the pattern element 280 appears blue overall. When illuminated with UV radiation (UV) ( Fig. 5b ) passes through the absorptive pattern element. For this it is of course necessary that this is transparent to the UV radiation and as possible is not scattered. In the luminescence pattern element, broadband visible luminescence radiation with a blue component (b), a green component (g) and a red component (r) is generated. Only the blue component of this radiation can pass through the overhead absorptive pattern element, since the green component and the red component are filtered out by the absorptive pattern element.

In Fig. 6 Further, the relationships with two different pattern elements 280, 280 'differing in the spectral absorption of the absorptive pattern element 210, 210' are shown. In each case below are the luminescence pattern elements 220 and overhead the absorptive pattern elements 210, 210 '. 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 two luminescent pattern elements are formed with the same luminescent agent. In contrast, different absorptive spectral filter means are in each of the two absorptive pattern elements. The uppermost left pattern element 280 has an absorptive pattern element 210 that absorbs the red portion (r) and the green portion (g) of visible radiation (VIS) that appears blue (b), and each right pattern element 280 'has the blue portion (b ) and the green part (g) absorbing absorptive pattern element 210 'so that this pattern element 280' appears red (r). This structure corresponds to that in Fig. 5 shown.

In Fig. 6a the situation is shown in the illumination and viewing of the pattern with visible light (VIS) and in Fig. 6b with UV excitation radiation (UV). Of the visible radiation, only the blue portion (b) is remitted in the left pattern element 280, while in the right pattern element 280 ', the red portion (r) is. Therefore, the left pattern element is blue under visible light illumination and the right pattern element is red. A corresponding image is produced under UV irradiation: the red component (r) and the green component (g) of the luminescent light are absorbed in the overhead left absorptive pattern element 210 so that only the blue component (b) of the luminescent light is emitted by the left pattern element 280, while in the overhead right absorptive pattern element 210 ', the blue portion (b) and the green portion (g) of the luminescent light are absorbed and only the red portion (r) of the luminescent light is emitted from the right pattern element 280'. Therefore, the pattern 201 generated by luminescence looks substantially the same as that obtained under visible light irradiation.

In a further embodiment of the invention, a luminescent layer with a luminescent agent and an absorptive layer with an absorptive spectral filter means are formed by printing these directly on top of each other on the same surface of a polymer film. The luminescent agent luminesces when excited with UV radiation approximately white. The two layers are produced by means of inkjet printing. The absorptive layer is formed on the first printed luminescent layer. In the Figs. 8A, 8B, 8C and 8D different examples are given. Each of the above (I) shows luminescent patterns formed with luminescent agents and absorptive patterns formed thereunder (II) with absorptive spectral filter means. At the bottom (III), the patterns printed on top of each other to form an overall pattern are shown.

According to the example of Fig. 8A For example, the first name of the document holder and a date in the luminescent color and its face image are printed with a conventional ink containing an absorptive spectrum filter means. Together, this results in a superposition of the first name of the document holder and the date with its facial image, whereby the first name and the date only become visible when the image is irradiated with the UV radiation. In the areas of the first name and the date, not the facial image superimposed, they appear with the original luminescent color of the luminescent agent, namely approximately white. In the areas superimposed on the face image, the first name and the date also appear under luminescence humidifying conditions with the color of the face image.

According to the example of Fig. 8B For example, a full-area field of the luminescent color and the face image of the document holder are printed with a conventional ink containing a spectral absorptive filter agent. Together, this results in a superimposition of the field with the face image of the document holder, the field is only visible when the representation is irradiated with the UV radiation. In the areas of the field that are not superimposed by the face image, it appears with the original luminescent color of the luminescent agent, namely approximately white. In the areas superimposed on the face image, the field appears under luminescent illumination conditions with the color of the face image.

According to the example of Fig. 8C In addition, the face image of the document holder in the luminescent color and the facial image thereof are printed in registration with a conventional printing ink containing a spectral absorptive absorptive filter. Together, the face image of the document holder when illuminated with a visible view in natural color distribution and when illuminated with UV radiation also appears with the natural color distribution.

According to the example of Fig. 8D For example, a bar pattern in the luminescent color and the face image of the document holder are printed with a conventional ink containing an absorptive spectrum filter means. Together, this results in a superposition of the bar pattern with the face image of the document holder, whereby the bar pattern is only visible when the image is irradiated with the UV radiation. In the areas of the bar pattern which are not superimposed on the face image, this appears with the original luminescent color of the luminescent agent, namely approximately white. In the areas superimposed on the face image, the bar pattern appears under luminescent lighting conditions with the color of the face image.

The luminescent layer in the examples of Fig. 8 can be either rasterized or non-rasterized. This pressure can also be achieved with a planographic printing process, be generated as the offset printing method. Likewise, in these examples, the absorptive layer may be either screened or not screened. Preferably, at least the absorptive pattern is generated with a digital printing process, such as an inkjet process, to take advantage of its flexibility for personalizing patterns.

Claims (8)

1. A security feature (200), containing at least one luminescence means on and/or in a product carrier (110, 110'), wherein the security feature (200) furthermore additionally contains at least one absorptive spectral filter means in and/or on the product carrier (110, 110') for luminescence radiation emitted by the at least one luminescence means, wherein 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, characterized in that luminescence pattern elements (220), which are formed by the at least one luminescence means, and absorptive pattern elements (210, 210'), which are formed by the at least one absorptive spectral filter means, are in each case configured to be substantially the same size and are arranged relative to one another in accurate alignment.
2. The security feature (200) as claimed in claim 1, characterized in that the at least one luminescence means is configured to be luminous in the visible spectral range by excitation with UV radiation (UV).
3. The security feature (200) as claimed in one of the preceding claims, characterized in that at least one of the at least one absorptive spectral filter means produces no luminescence radiation under irradiation.
4. The security feature (200) as claimed in one of the preceding claims, characterized in that the at least one absorptive spectral filter means is contained in at least one pattern (201) formed with printing colors according to the CMYK color space.
5. The security feature (200) as claimed in one of the preceding claims, characterized in that the luminescence pattern elements (220) and the absorptive pattern elements (210, 210') are in each case arranged in direct contact with one another.
6. The security feature (200) as claimed in one of the preceding claims, characterized in that the pattern elements (280, 280') are located in a pattern element layer (240; 250; 260) that contains both the at least one luminescence means and the at least one absorptive spectral filter means.
7. The security feature (200) as claimed in one of the preceding claims, characterized in that the at least one luminescence means forms a luminescence pattern and the at least one absorptive spectral filter means forms an absorptive pattern and in that the luminescence pattern and the absorptive pattern are in each case individualizing for a valuable and/or security product formed therewith.
8. The security feature (200) as claimed in one of the preceding claims, characterized in that the at least one luminescence means forms a luminescence pattern and the at least one absorptive spectral filter means forms an absorptive pattern and in that the luminescence pattern and the absorptive pattern are formed by a single pattern layer which contains both the at least one luminescence means and the at least one absorptive spectral filter means.

Images