EP4328043A1 - Un procédé de fabrication d'un support de données et un produit semi-fini - Google Patents

Un procédé de fabrication d'un support de données et un produit semi-fini Download PDF

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Publication number
EP4328043A1
EP4328043A1 EP23193532.1A EP23193532A EP4328043A1 EP 4328043 A1 EP4328043 A1 EP 4328043A1 EP 23193532 A EP23193532 A EP 23193532A EP 4328043 A1 EP4328043 A1 EP 4328043A1
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EP
European Patent Office
Prior art keywords
color
areas
printing layers
printing
patterns
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23193532.1A
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German (de)
English (en)
Inventor
Ulrich Bielesch
Martin RÖTZER
Michael MAUDERER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bundesdruckerei GmbH
Original Assignee
Bundesdruckerei GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bundesdruckerei GmbH filed Critical Bundesdruckerei GmbH
Publication of EP4328043A1 publication Critical patent/EP4328043A1/fr
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/41—Marking using electromagnetic radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/24—Ablative recording, e.g. by burning marks; Spark recording

Definitions

  • the invention relates to a method for producing a data carrier of a security document with a color image, a semi-finished product for the production of such a data carrier and a data carrier of a security document with a color image.
  • Data carriers can in particular be card-shaped laminated bodies made from one or more substrate layers, which form the security document itself or a component of the security document.
  • security documents in which the data carrier forms the security document itself are, for example, ID cards, driving licenses, access cards, bank cards, etc.
  • data carriers that are only part of a security document are, for example, passport cards or the like, which are bound as one page in a booklet, for example .
  • Colored images are used in particular to display individualized information, for example the image of a person to whom the corresponding data carrier is assigned.
  • the interest here is to prevent, if possible, any forgery or falsification of the information stored in the color image.
  • Information that is stored in the data carrier using laser radiation has proven to be difficult to imitate and/or falsify.
  • the WO 2011/124 774 A1 describes an apparatus for customizing a latent image embedded under a transparent mechanical protective layer, the latent image consisting of printed, uniformly distributed so-called subpixels, which are in the primary colors plus the color white, the surface of each subpixel of the latent image is partially or completely converted into a non-reflective dark color area by means of the impingement of a laser beam through the transparent protective layer, thereby forming the gray levels of the final individual image.
  • An application for the individual design of credit cards is described.
  • the US 2014 361 527 A1 describes a process for producing color laser images.
  • a latent image consisting of colored subpixels and non-colored zones is personalized by a laser beam acting in the laserable layer located under the colored subpixels and non-colored zones to produce a final personalized color laser image.
  • a document is engraved with a surface layer and one or more sublayers.
  • the underlayer contains different colors and arrangements of ink.
  • a laser creates openings in the surface layer to expose colored ink in the underlayer and create colored images and/or text.
  • the WO 2012 / 117 168 A1 describes a method for producing a document with a high reflectivity color laser image, the document comprising a sheet of laserable material, subpixels in primary colors and a white substrate, wherein gray levels of the color image are produced using laser radiation by carbonizing the laserable material.
  • the subpixels are separated by transparent areas that increase reflectivity and enhance the white portions of the personalized image.
  • the invention is based on the object of creating a method for producing a data carrier of a security document with a color image, a semi-finished product of a data carrier of a security document and a data carrier of a security document with a color image, in which the color image has a high color saturation.
  • the basic idea of the invention is to create a data carrier of a security document by printing color patterns, which are generated from color areas of primary colors of a color space, one above the other on a substrate layer.
  • the color patterns are printed one above the other in such a way that color areas of each basic color are laterally offset compared to the color areas of the same basic color of the color pattern printed immediately before.
  • Each color pattern is printed using a printing layer.
  • at least parts of the color areas of at least the top color pattern, and possibly also several or all color patterns are selectively removed locally in order to produce a color image with different color impressions at different locations.
  • An advantage of the invention is that no blackened areas need to be inserted to form the color image, which darken the color image. Furthermore, there are no remaining areas of a cover layer as in some prior art embodiments. This allows a color image with high color saturation to be achieved.
  • a color area is a monocolored area.
  • a color range can have any shape. Color areas that have the shape of a stripe, a square or a rectangle are preferred.
  • the basic colors of a color space are those colors that together form a color space (gamut) in the sense of color addition or color subtraction.
  • the colors of the color space can be generated in which the color components of the different primary colors are varied, for example by selecting the areal extents of the individual color areas. For example, if a color image is broken down into image points (pixels), one image point has sub-image points that are assigned to the individual primary colors. By varying the area proportions of the sub-pixels, the perceived color is due to the color subtraction or color addition of the corresponding pixel set.
  • cyan, magenta and yellow represent the basic colors of a color space, the colors of which can be displayed using common inkjet printers or color copiers. The color impression is determined based on color subtraction.
  • Another color space includes the primary colors red, green and blue. This color space is used for color addition, for example in colored LCD displays or for viewing data carriers with colored translucent and/or transparent color areas through transmitted light.
  • a permutation is an arrangement of objects in a specific order. If we are talking about a permutation of color ranges with the primary colors of the color space, then the permutation includes exactly one color range for each primary color of the color space.
  • a color pattern is a pattern made up of color areas arranged next to each other.
  • a color pattern is formed based on a permutation of the primary colors of a color space, it is considered to be the same as another color pattern that is formed based on the same permutation of the primary colors if the permutation occurs in the same sequence in the two color patterns regardless of edge effects, in which the permutations in the two patterns compared are not complete and may be different.
  • the color patterns are the same if a permutation exists, based on the juxtaposition of which the two color patterns can be created except for the beginning and / or end areas, wherein the beginning and/or end areas do not result in a complete permutation of the color areas of the primary colors of the color space.
  • a material is referred to as being transparent to light of certain wavelengths, through which imaging according to geometric optics is possible with light of these specific wavelengths.
  • a clear window pane is transparent to light in the visible wavelength range.
  • a red-colored transparent plastic film is transparent to light in the "red" wavelength range.
  • Translucent to light of a wavelength range is a material that transmits light of this wavelength range but diffusely scatters it internally.
  • a frosted glass pane or a diffusing pane, for example, is translucent to light in the visible wavelength range.
  • a physically self-supporting layer is considered a substrate layer.
  • plastic films that can be handled without support layers, sheets of paper, etc. are substrate layers within the meaning of this definition.
  • printing layers or printing layers that rely on a substrate layer as a carrier are not substrate layers in the sense of the definition used here.
  • a printing layer that forms a color pattern is or forms, at least in the area of the color areas, a material layer that has a finite material layer thickness and that is different from other substrate layers or material layers.
  • a print layer that forms a color pattern can also have colorless, clear areas that, for example, separate color areas from one another.
  • the printing layer can be formed as a material layer with a uniform layer thickness, at least in contiguous areas in which a color pattern is printed.
  • a solid color area or a clear colorless area is not considered a color sample.
  • a single-color printing layer does not have a color pattern in the sense of the invention described here.
  • Printing or imprinting a print layer that includes a color pattern is understood to mean any process that can reproducibly and controlled form differently colored monochrome color areas arranged next to one another in a thin layer.
  • a layer or layer produced in this way is called a pressure layer.
  • White light is light that has a continuous wavelength spectrum in the visible wavelength range.
  • a method for producing a data carrier of a security document with a color image comprises the steps: providing at least one substrate layer; Printing of at least two printing layers, each of the at least two printing layers having a color pattern which comprises different colored color areas, the different colored color areas having primary colors which together span a color space, the same colored color areas of the color patterns of printing layers printed on one another being laterally offset, Irradiating laser radiation for the local removal at different positions of at least parts of color areas of the color pattern or the color patterns of the at least two printed layers, so that different color impressions are generated at different locations due to color addition or color subtraction due to the remaining and / or exposed portions of the color patterns form the color image together.
  • Such a semi-finished product therefore has a latent, not yet individualized image.
  • a different color impression can be created locally by removing parts of the color areas of a color pattern or several color patterns at different locations in order to form the finished color image.
  • a part of a color area of the top color pattern ie the color pattern which is furthest away from the at least one substrate layer on which the printing layers with the color patterns are printed one after the other, is specifically removed in order to create a color area of the underlying one, ie closer to the at least to expose a color pattern located in a substrate layer.
  • the parts of the color areas of the two upper color patterns ie those furthest away from the at least one substrate layer, can also be removed in order to expose an underlying color area of the color pattern printed directly onto the substrate layer by means of a printing layer.
  • the exposed or remaining color areas at one point of the semi-finished product processed in this way determine the resulting color impression at this point. Since parts of the color areas are removed and removed in a locally targeted manner, different color impressions from the color space can be created in different places. These together create the color image.
  • Such a semi-finished product can then be further processed into a data carrier of a security document, for example by adding further security features or security elements and/or the semi-finished product with further substrate layers is inserted, for example, into a lamination body, which forms a finished security document body in the form of a data carrier of a security document.
  • the individual printing layers are preferably designed in such a way that they each form a layer which is formed on a surface of the substrate or a previously broken printing layer and does not penetrate into the substrate layer or previously applied printing layer.
  • a printing layer has a layer thickness of the color areas that is as uniform as possible.
  • a thin layer with high transmission which is preferably transparent and particularly preferably clear and colorless, can be arranged between a substrate layer and a printing layer that forms a color pattern, or between two printing layers, each of which forms a color pattern, or between them be formed.
  • the thin layer can also be translucent, with diffuse scattering having no noticeable influence due to the small layer thickness.
  • the thin layer is not a self-supporting layer.
  • This thin, preferably transparent, particularly preferably clear, colorless layer can be printed using any method or formed using a conventional method for applying lacquer layers.
  • the thin layer is preferably made of a material which prevents the colorants of a printing layer from penetrating into the adjacent substrate layer or printing layer. If the substrate layer is porous or open-pored, this thin, preferably transparent, particularly preferably clear, colorless layer can also be formed entirely or partially in the substrate layer surface if this thin layer serves the purpose of the printing layer applied thereto forming a separate layer and No colorants get into the substrate layer from this.
  • the thin, preferably transparent, layer is colorless.
  • the thin, preferably transparent, layer is or is formed based on a curable plastic.
  • This is preferably curable or hardened by means of radiation, for example UV radiation.
  • the printing layers can also be printed using curable preparations, which are particularly preferably cured before printing the next printing layers. This can also prevent the different colors or colorants from “running into one another” or “diffusing into one another”.
  • a thin, preferably transparent layer between a substrate and a printing layer and/or between the individual printing layers also facilitates the targeted removal of parts of the color areas without changing underlying color areas of another printing layer.
  • Printing layers are therefore also considered to be printed one above the other if such a thin, preferably transparent, particularly preferably clear, colorless layer is applied between the printing layers, the material thickness of which is in the order of magnitude of a layer thickness of one of the printing layers.
  • a material thickness and a layer thickness are considered “of the order of magnitude” if the material thickness of the thin layer does not exceed 10 times the layer thickness of the printed layer.
  • a printing layer is also considered to be printed on a substrate layer if a coating is applied to the substrate layer and is printed on.
  • the at least two printing layers are printed in such a way that the color patterns of the at least two printing layers have the same sequence or the same sequences of color areas with regard to an excellent direction.
  • This ensures, for example, that, if necessary except for the edge areas, identical color patterns can be printed one above the other, the color areas of the same color being shifted or offset from one another by a uniform offset.
  • the offset of the color samples ensures that at every point, just as in the individual color sample, the individual primary colors are adjacent to one another, and in the color samples printed one above the other, color areas of the primary colors are also arranged one above the other. At least two different primary colors can be used alternatively at each point to create a color image with high color saturation.
  • the color patterns are all formed based on a permutation of color areas with the primary colors of the color space.
  • the color patterns are therefore preferably based on one and the same permutation of the color ranges of the primary colors. At the edges of the color pattern, the permutation does not have to be complete. This makes it possible to reliably predict the position of the individual color areas of the various primary colors in a simple and precise manner, even in the overprinted color samples.
  • the color patterns are printed using the two printing layers in such a way that a center distance between adjacent color ranges within the respective color pattern is the same and is identical between the color patterns of different ones of the at least two printing layers.
  • the color areas are preferably designed in such a way that adjacent color areas of at least the top color pattern, i.e. the color pattern of the printing layer of the at least two printing layers, which is at the greatest distance from the at least one substrate layer, abut one another at least along one direction.
  • the color areas of at least the top color pattern completely cover a closed, coherent area without overlapping each other in the printing layer itself.
  • lower color patterns i.e. color patterns that are overprinted by a color pattern of at least one further of the at least two printing layers, can also have transparent, colorless intermediate areas between the color areas in the printing layer. These are preferably formed using a transparent and colorless printing preparation or printing ink, thereby achieving a uniform material thickness of the printing layer in the area of the color pattern.
  • the transparent, colorless areas can also be formed by “gaps” in the printing layer.
  • all color patterns have the same area and are all completely filled with color areas that abut one another but do not overlap in their respective printing position.
  • the color patterns completely cover each other, possibly apart from in edge areas, with edge areas for this definition having a maximum width that is less than a width or a center distance of the color areas multiplied by the number of primary colors in the color space.
  • a particularly optimal compact arrangement of color areas is obtained if the center positions of the color areas of a color sample of one of the at least two printing layers are a distance away from the center positions of corresponding corresponding colors Subject areas of the color pattern of the immediately previously printed at least two printing layers are laterally offset along the marked direction, the distance resulting from the product of the center distance of adjacent color areas and a quotient consisting of the number of different primary colors of the color space and the number of at least two printing layers are formed with a color pattern.
  • the color patterns are formed from strip-shaped or cuboid-shaped, possibly square, color areas, the distinguished direction is determined by the direction along which the color areas are lined up laterally in a sequence. For strip-shaped color areas, for example, transverse to the stripe direction.
  • the invention makes it possible to achieve a higher pixel resolution in the color image formed by means of laser radiation by partially or completely superimposing color areas on one another than is only possible with the help of the printed color areas.
  • color areas of all three primary colors are preferably printed one above the other at each point.
  • a pixel resolution that can be achieved here is therefore limited by the extent of the image areas, ie by the center distance of the color areas.
  • the achievable pixel resolution in the example given is a factor of three smaller, since the three color areas of the primary colors are arranged next to each other.
  • the pixel resolution is defined as the number of pixels per area, whereby a pixel here can assume or has an arbitrarily selected color impression due to all the primary color components or associated color areas that interact during color addition or color subtraction and that span the gamut.
  • Color areas are preferably opaque, which enables color image generation for viewing in remission, i.e. H. for viewing from the side from which the color image is illuminated.
  • the color image can also be viewed in transmitted light, with the light being irradiated under the color image and the color image viewed from the opposite top becomes.
  • the color areas are preferably transparent and/or translucent.
  • the at least one substrate layer or a layer connected to the at least one substrate layer on the side facing away from the side onto which the at least two printing layers are printed is white or diffusely remitting.
  • the at least one substrate layer can therefore be designed to be white at least in the area of the color image or a substrate layer arranged underneath that is connected to the at least one substrate layer in the area of the color image.
  • a substrate layer that has a printing layer that is white is also considered to be white.
  • At least one transparent cover layer which covers and encloses the color patterns, after removing at least parts of color areas of the color pattern or the color patterns of the at least two printing layers by means of the Laser radiation is connected to the at least one substrate layer.
  • additional blackening can be introduced into one of the printing layers and/or the at least one substrate layer and/or a substrate layer connected to the at least one substrate layer using laser radiation in order to produce gray levels and black components of the color image.
  • the black components are preferably in the plane of the color samples or below the color samples introduced into the at least one substrate layer or a further substrate layer connected thereto,
  • the printed layers with the color samples are made with as little material thickness as possible. A distance between the printing layers is also preferably minimized.
  • the at least two printing layers are therefore printed directly on top of one another.
  • a thin, preferably transparent, layer is applied or formed between two printing layers, its material thickness is or is preferably minimized.
  • the thin layer serves to separate the color areas and prevent “mixing” during production.
  • the thin layer also offers the additional advantageous effect of facilitating the targeted removal of parts of the color areas without affecting color areas underneath and/or adjacent to them.
  • foaming can also be created locally with the laser radiation in at least one substrate layer made of plastic material or substrate layer connected thereto, preferably below the color image, i.e. H. on the side of the color image facing away from the viewing area. Foamed areas usually scatter light diffusely, so that a white color impression is created when illuminated with white light.
  • Fig. 1 an exploded view of a semi-finished product 10 of a data carrier 20 of a security document 1 is shown schematically.
  • the semi-finished product 10 comprises at least one substrate layer 100, which is, for example, a plastic layer. All common materials that are used for security documents can be considered as materials for the at least one substrate layer 100. In particular, these are plastic materials such as polycarbonate, polyethylene, ABS, PVC, but paper or cotton are also suitable materials.
  • the at least one substrate layer is preferably made, for example, from filled polycarbonate, which has a white, opaque color.
  • the at least one substrate layer 100 can also be made from a transparent or translucent plastic material, for example polycarbonate.
  • a transparent polycarbonate layer can be printed with a white printing layer on a top side 101 or alternatively on a bottom side 102. At the in Fig. 1 In the embodiment shown, such a white printing layer is missing, since the at least one substrate layer 100 itself is white.
  • a printing layer 120 and above this a printing layer 140 are printed on the top side 101 of the at least one substrate layer 100.
  • a color pattern 130 is printed on the printing layer 120, which is formed from strip-shaped color areas 131-133.
  • the color areas 131-133 each have a basic color of a color space.
  • Basic colors which are also referred to as primary colors, are, for example, the colors cyan, magenta and yellow in the illustrated embodiment. The colors are in Fig. 1 and the other figures indicated via hatching.
  • a medium density hatching from the bottom left to the top right indicates cyan
  • a medium density hatching from the bottom right to the top left indicates the color magenta
  • a medium density horizontal hatching from left to right or vice versa indicates the color yellow.
  • the orientations are given in relation to the drawing plane in which the lower edge is horizontally aligned.
  • the primary colors are repeated in the color pattern.
  • the color pattern 130 is therefore based on the permutation of Primary colors cyan, magenta, yellow formed in this order. This permutation is repeated in color pattern 130.
  • a center distance 136 of adjacent color areas which is measured from a center of a color area, for example 131, to the center of an adjacent subject area, for example 132, is the same between all color areas 131-133.
  • the color areas 131-133 are formed to abut one another so that the color pattern 130 forms a closed colored area of a latent image.
  • a selected print resolution for forming the color areas 131-133 is preferably chosen so that a human viewer at a usual viewing distance of, for example, 20-50 cm does not perceive the color areas as individual areas having a basic color, but rather perceives a mixed color impression, which is due to the color subtraction of the individual color areas.
  • the center distances 156 of the color areas 151-153 are also the same in the color pattern 150 between adjacent color areas 151 to 153 and are also identical to the center distances 136 of the color areas 131-133 of the color pattern 130.
  • both color patterns 130,150 are based on the same permutation the primary colors or the color ranges of the primary colors cyan, magenta, yellow are formed.
  • the color space is spanned by three basic colors or primary colors, namely the basic colors cyan, magenta and yellow, and a total of two printing layers 120,140 with a color pattern 130,150 are or are printed one above the other on the at least one substrate layer 100
  • the color areas of the same color are 131,151; 132,152; 133,153 each printed laterally offset from one another by one and a half center distances 136, 155 of the color areas.
  • the individual printing layers 120, 140 are shown spaced apart from the substrate layer 100 and from each other due to the perspective exploded view, both along a "layering direction" and offset laterally to the rear and to the right.
  • a center line 1310 indicates a center of the color area 131 on its edge facing the viewer.
  • the color range 131 is cyan.
  • a further center line 1510 shows a center of the color area 151 on its edge facing the viewer on the left edge of the color pattern 150.
  • the color range 151 also has the color cyan.
  • These color areas 131, 151 are laterally offset from one another in the semi-finished product 10 or security document 1.
  • the center line 1510 is transferred by means of a projection shown by an arrow 15 into a center auxiliary line, also designated by the reference number 1510, which is shown in dashed lines.
  • the projection represented by the arrow 15 compensates for the relative shift chosen for representation based on the perspective exploded view between the color patterns 130, 150 of the 120, 140 formed one above the other.
  • the center auxiliary line 1510 indicates the center of the color range 151 in the plane in which the The edges of the color areas 131, 132, 133 and 151, 152, 153 facing the viewer are all lying after compensation for the display offset.
  • the lateral offset 1351 in the semi-finished product 10 or security document 1 between the center lines 1310 and 1510 of one and a half center distances 136 between adjacent color areas of the color pattern 130 can be clearly seen. It should be noted again that the center distance 156 between adjacent color areas 151, 152, 153 of the color pattern 150 is equal to the center distance 136 between adjacent color areas 131, 132, 133 of the color pattern 130.
  • the last color area 157 in the color pattern 150 when viewed from left to right, is yellow and does not cover any color area of the first pattern 130. However, this color area 157 could also be added as the first color area on the left edge 158 of the color pattern 150. Even if the color pattern 150 would then begin with a yellow color area, it would still be created based on the same cyan, magenta, yellow permutation, since the entire color pattern 150 can be created except for the edge areas using this repeating permutation. A left edge area would then be formed by the yellow color area and an opposite right edge area would be formed by the remaining cyan and magenta color areas. Alternatively, a transparent and colorless material area can also be formed as the end of the color pattern.
  • parts of color areas 151-153 of the upper color pattern 150 and, if necessary, both color patterns 130, 150 are removed in a locally targeted manner using laser radiation to create different surface areas of the To make primary colors or the at least one white substrate layer perceptible to a viewer, so that due to the color subtraction or the white color of the at least one substrate layer 100 different mixed color impressions or a white color impression arise at different points of the semi-finished product 10.
  • a white color impression, indicated by a lack of hatching can also alternatively be produced by producing a foaming 200 using laser radiation, in particular in a transparent plastic material. This can be used, for example, in embodiments in which the at least one substrate layer is transparent. Such foaming can then be carried out, for example, after the targeted removal of parts 180 of the color areas of the color pattern 150 and parts of the underlying color areas of the color pattern 130 in the at least one substrate layer 100.
  • blackening 190 indicated by very dense horizontal hatching, in the color areas 131-133; 151-153 and/or the underlying at least one substrate layer 100 are formed after corresponding parts of the color areas 131-133 located above them; 151-153 of the color samples 130,150 of the printing layers 120,140 are removed.
  • the semi-finished product 10 is preferably assembled with further substrate layers to form a data carrier. This is done, for example, in a lamination process using heat and pressure.
  • At least the at least one substrate layer 100 has the color patterns 130, 150 of the printing layers 120, 140 over its entire surface covered. It is obvious to those skilled in the art that the color patterns 130, 150 of the printing layers 120, 140 can also only cover a partial area of the at least one substrate layer. Any other security features and security elements can be formed and applied to the non-printed areas of the at least one substrate layer.
  • the process steps for foaming and/or blackening described above can also be carried out subsequently after the at least one substrate layer 100 has been joined together with further substrate layers.
  • the blackening and foaming can also be carried out in these other subsequently added substrate layers.
  • Fig. 2 is a schematic sectional view through a data carrier 20 of a security document 1 shown schematically.
  • the same technical features are provided with the same reference numbers in all figures. It should also be noted that the illustrations are only schematic and in particular the material thicknesses of the printing layers 120, 140, 160 are not shown to scale, nor are the widths and thicknesses of the color areas.
  • three printing layers 120, 140, 160 with color patterns 130, 150, 170 are printed on one another on the at least one substrate layer 100.
  • the color patterns 130, 150, 170 are formed based on the cyan-magenta-yellow permutation. You can clearly see that color areas of the three primary colors are printed one above the other at every point. Also visible are the recesses 205 formed by the targeted local removal of parts of the color areas in the individual printing layers 120, 140, 160. This changes the proportions of the primary colors that are perceptible to an observer, which creates a locally perceived mixed color impression. Different color impressions are thus recorded at different points, which forms the overall color image.
  • further transparent substrate layers 211, 212 are connected to the at least one substrate layer 100. These act as protective layers.
  • additional substrate layers 221, 222 are connected to the at least one substrate layer 100. These are preferably all in one Lamination process using pressure and heat to form the data carrier 20 of the security document 1.
  • the recesses 205 are filled with transparent material of the further printing layer 212.
  • parts of the color areas are darkened by blackening.
  • a foam 200 is formed in the substrate layers 210, 211, which forms a white color impression.
  • this could also be formed in the at least one substrate layer, for example below the recess 207, which removes parts of all three color areas 133, 152, 171 arranged one above the other.
  • FIG. 3 a flowchart of a method for producing a semi-finished product or a data carrier of a security document is shown schematically.
  • a white printing layer can be printed onto the at least one substrate layer 320.
  • a dashed line indicates that the method step is optional.
  • the "c"-like representation is intended to indicate that this process step can be carried out at different points in the process.
  • At least two printing layers with a color pattern are printed 330 onto the at least one substrate layer, optionally over the printed white printing layer, the color patterns each being formed from color areas which have primary colors of a color space.
  • the method step of printing a print layer with a color pattern 330 is therefore carried out at least twice, but can also be carried out more frequently. If there is already a print layer with a color pattern, the next print layer is printed in such a way that the color areas of the color pattern are laterally offset compared to color areas of the same color.
  • laser radiation is irradiated locally in a targeted manner 340 in order to remove parts of the color areas, i.e. H. to remove.
  • parts of the color areas i.e. H. to remove.
  • at least parts of specialist areas of the last printed layer, but possibly also other printed layers, are specifically removed.
  • the color components of the primary colors that are perceivable to an observer change locally, so that the color impression can be varied locally due to color subtraction or color addition. This creates a color image.
  • additional substrate layers in particular one or more transparent substrate layers, which cover and enclose the color patterns, are generally connected 350 to the at least one substrate layer.
  • This method step can also be carried out at different points in the method.
  • Blackening can also be carried out in parts of the color areas, the at least one substrate layer or optionally further substrate layers connected thereto by irradiating laser radiation in order to produce black components of a color image.
  • the at least one substrate layer is not itself white or is not printed with a white printing layer and no other white substrate layer is connected to the at least one substrate layer on the side facing away from the printing layers with the color pattern
  • white components can be used locally Foaming using laser irradiation 370 can be added.
  • a color image which is formed by printing color patterns on top of one another and deliberately partially removing specialist areas using laser radiation, can be reliably distinguished from printed color images.
  • Semi-finished products and data carriers or security documents with color images which are formed by color patterns printed one above the other and partially removed using laser radiation, are much more difficult to forge or imitate than data carriers with printed color images.
  • very precise printing processes are necessary require a high level of expertise in the field of printing. Counterfeiters often lack this expertise.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Methods (AREA)
EP23193532.1A 2022-08-26 2023-08-25 Un procédé de fabrication d'un support de données et un produit semi-fini Pending EP4328043A1 (fr)

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DE102022208882.4A DE102022208882A1 (de) 2022-08-26 2022-08-26 Farbige Laserpersonalisierung mit hoher Farbsättigung

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EP4328043A1 true EP4328043A1 (fr) 2024-02-28

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050001419A1 (en) 2003-03-21 2005-01-06 Levy Kenneth L. Color laser engraving and digital watermarking
WO2011124774A1 (fr) 2010-04-07 2011-10-13 Jean Pierre Lazzari Procede de personnalisation d'images latentes encastrees et document realise
WO2012117168A1 (fr) 2011-02-28 2012-09-07 Jean Pierre Lazzari Procede de formation d'une image laser couleur a haut rendement reflectif et document sur lequel une image laser couleur est ainsi realisee
EP2539154B1 (fr) * 2010-02-26 2014-08-06 Bundesdruckerei GmbH Procédé de marquage coloré de documents de valeur et de sécurité
US20140361527A1 (en) 2011-12-19 2014-12-11 Jean Pierre Lazzari Method of forming a color laser image, and resulting document
EP2465701B1 (fr) * 2010-12-17 2016-04-13 Giesecke & Devrient GmbH Elément de sécurité doté de marques
EP2643161B1 (fr) * 2010-11-26 2019-01-16 Bundesdruckerei GmbH Document de valeur et/ou de sécurité présentant une caractéristique de sécurité colorée transparente, ainsi que son procédé de fabrication
EP3578379A1 (fr) * 2018-06-07 2019-12-11 Bundesdruckerei GmbH Élément de sécurité à représentation colorée

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050001419A1 (en) 2003-03-21 2005-01-06 Levy Kenneth L. Color laser engraving and digital watermarking
EP2539154B1 (fr) * 2010-02-26 2014-08-06 Bundesdruckerei GmbH Procédé de marquage coloré de documents de valeur et de sécurité
WO2011124774A1 (fr) 2010-04-07 2011-10-13 Jean Pierre Lazzari Procede de personnalisation d'images latentes encastrees et document realise
EP2643161B1 (fr) * 2010-11-26 2019-01-16 Bundesdruckerei GmbH Document de valeur et/ou de sécurité présentant une caractéristique de sécurité colorée transparente, ainsi que son procédé de fabrication
EP2465701B1 (fr) * 2010-12-17 2016-04-13 Giesecke & Devrient GmbH Elément de sécurité doté de marques
WO2012117168A1 (fr) 2011-02-28 2012-09-07 Jean Pierre Lazzari Procede de formation d'une image laser couleur a haut rendement reflectif et document sur lequel une image laser couleur est ainsi realisee
US20140361527A1 (en) 2011-12-19 2014-12-11 Jean Pierre Lazzari Method of forming a color laser image, and resulting document
EP3578379A1 (fr) * 2018-06-07 2019-12-11 Bundesdruckerei GmbH Élément de sécurité à représentation colorée

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