WO2007051530A2 - Element de securite et procede de fabrication dudit element - Google Patents

Element de securite et procede de fabrication dudit element Download PDF

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Publication number
WO2007051530A2
WO2007051530A2 PCT/EP2006/010088 EP2006010088W WO2007051530A2 WO 2007051530 A2 WO2007051530 A2 WO 2007051530A2 EP 2006010088 W EP2006010088 W EP 2006010088W WO 2007051530 A2 WO2007051530 A2 WO 2007051530A2
Authority
WO
WIPO (PCT)
Prior art keywords
relief
security element
marking
element according
substrate
Prior art date
Application number
PCT/EP2006/010088
Other languages
German (de)
English (en)
Other versions
WO2007051530A3 (fr
Inventor
Georg Depta
Original Assignee
Giesecke & Devrient 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 Giesecke & Devrient Gmbh filed Critical Giesecke & Devrient Gmbh
Priority to EP06806394A priority Critical patent/EP1945466B1/fr
Priority to CA002627902A priority patent/CA2627902A1/fr
Priority to DE502006007502T priority patent/DE502006007502D1/de
Priority to AT06806394T priority patent/ATE474724T1/de
Publication of WO2007051530A2 publication Critical patent/WO2007051530A2/fr
Publication of WO2007051530A3 publication Critical patent/WO2007051530A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/324—Reliefs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D2033/24—

Definitions

  • the invention relates to a security element with an optically variable structure, which contains an individualization identifier, and to a method for producing such a security element.
  • the invention further relates to a data carrier equipped with such a security element.
  • data carriers such as banknotes, securities, certificates, vouchers, checks, high-quality admission tickets, but also other counterfeit-endangered papers, such as credit cards, passports and other identity documents, as well as product protection elements, such Labels, seals and packaging, equipped with optically variable security elements.
  • the protection against counterfeiting is primarily based on the fact that the visually variable effects are visually simple and clear to the human observer, but that they can not be imitated with today's known reproduction devices, since these always reproduce the optically variable elements only from one viewing direction.
  • EP 0801 604 B1 discloses relief structures with a tilting effect. These security elements essentially consist of a grid of specific spatial frequency, which is combined with a flat coating grid of the same spatial frequency such that at least parts of the coating grid are visible when viewed vertically, but are concealed under oblique viewing under a predetermined viewing direction. When alternately vertical and oblique viewing so creates a tilting effect.
  • the printing and embossing methods used as standard do not allow individual information for each individual use in the tilted image.
  • the standard method for individualizing bank notes or value prints the lettering in the book or high-pressure, used, so a previously introduced imprint would be partially destroyed.
  • the printing order can only be reversed with difficulty, since the customization is generally used as the last print run.
  • the grid structures are fine line or dot patterns, effect color, which due to its pigment size can only be applied in relatively coarse screen printing, can generally not be used as a flat print.
  • the document DE 19947425 A1 discloses a process for coating existing relief structures, in which the relief material is coated at an oblique angle with the aid of ink droplets or pigments, so that the flanks are each colored with a specific color.
  • this method requires an oblique orientation of the Farbtröpfchen- or pigment stream relative to the relief structure, preferably in an evacuated or over-pressurized area, which makes fast mass production difficult with conventional printing machines.
  • the method allows a later, but no individual marking of the disk.
  • the invention has for its object to provide a generic security element that avoids the disadvantages of the prior art.
  • the security element is to combine individualization and optically variable effect in an advantageous manner and can also be produced at the high processing speeds demanded in securities printing.
  • a method for producing a security element with an optically variable structure which contains an individualization indicator comprises the method steps:
  • the marking structure and the relief structure are combined in such a way that different information is visible from different viewing directions and the individualization code is generated in at least one of the steps a) or b) with a non-contact method or a printing method without a fixed printing form.
  • NIP method Printing method or NIP method called.
  • the term "non-impact” is based on a distinction from earlier customary "impact printers” in which a type or needles by impact has brought the information on the paper.
  • Such systems have in many cases been replaced by electrophotographic methods in which the information is transmitted via a laser contactlessly to an intermediate carrier, the latent charge image stored there is colored with a toner and then transferred to the paper.
  • NIP processes there is contact between the information color carrier and the paper during printing, but the information is not transferred by impact (see Handbuch der Printmedien, ed. Helmut Kipphan, Springer, 2000, p No. 709.
  • Printing methods without a solid printing form include, in particular, electrophotography, ionography, magnetography, ink-jet methods and thermography (ibid., P.
  • the marking structure and the relief structure are produced with the same method in one step.
  • the marking structure and the relief structure are produced in separate working steps. testifies, wherein the marking structure can be generated before or after the relief structure.
  • a space-saving connection of the security element and individualization of a data carrier is achieved as advantages, as well as additional security through the possibility of correspondence between the security element and other individualizations, for example the connection of a tilting element with a code on a banknote.
  • the flat markings are produced for example by laser color removal from preprinted surfaces, it is also possible to use effect colors which, owing to their pigment size, can only be applied by screen printing with a relatively high mesh size and therefore do not permit fine resolution in the required spatial frequency in the printing. In this way, for example, color and information tilt effects can be combined.
  • the creation of the reliefs substantially in the substrate of the data carrier also prevents the problem of abrasion of ink layers during use, as may occur, for example, in the method known from the publication DE 69209185 T2. Since the relief is essentially in the substrate, it has a better durability against other mechanical or chemical loads. If the marking structure and the relief structure are generated with the same device in a single operation, there is also no registration problem between relief information and marking information. As a result, it is possible to dispense with repeatedly presenting the resulting tilting information.
  • the substrate of the data carrier is in particular a coated or uncoated cotton paper or a coated or uncoated plastic film, in particular based on PVC, polycarbonate or PET.
  • the relief structure is embossed into the substrate.
  • the embossing can be done for example with a stamping tool or in intaglio.
  • the substrate is provided with the relief structure by the action of a laser beam.
  • the laser parameters for generating the relief structure are tuned in a manner known per se to the composition and properties of the substrate, as described, for example, in the publications DE 10247591 A1 or DE 3213315 A1, the disclosure of which is incorporated into the present application.
  • the relief structure is advantageously designed in the form of a grid, preferably a grid with a constant spatial frequency.
  • halftone dot is understood in the usual sense in printing technology and does not mean an expansion-free point in the mathematical sense.
  • Possible raster arrangements include rasters with a constant period (constant point size, constant point distance), amplitude-modulated rasters (variable point size, constant point distance), frequency Modulated raster (constant point size, variable dot pitch) and non-periodic higher order rasters, as described in the above-mentioned handbook of print media on pages 44 ff.
  • one-dimensional grids are also provided.
  • the "grid points" are formed in this case by linear grid elements.
  • the substrate is provided with the marking structure by the action of a laser beam.
  • the marking structure can be introduced into a substrate body, such as a cotton paper or a plastic film, or into a layer applied to the substrate body.
  • the marking structure is printed on the substrate.
  • the marking structure can be applied, for example, by the ink-jet method or with a low-pressure digital printing method.
  • the marking structure is advantageously produced in planographic printing, such as offset printing, in high-pressure printing, such as in letterpress printing or flexographic printing, in screen printing, or in a thermographic process, such as in the thermal transfer process.
  • the marking structure is advantageously designed in the form of a grid, preferably in the form of a grid with a constant spatial frequency, the flat markings forming the "grid points" of the grid
  • the possible grid arrangements are the same as described above in connection with the relief grid described.
  • the grid of relief structure and marking structure preferably have the same spatial frequency. However, it is also possible to use the relief structure and the marking structure for generating beat or moiré effects with slightly different spatial frequencies.
  • the individualization identifier preferably comprises letters, numbers or a symbol code, such as a bar code or matrix code.
  • the substrate and / or the surface of the security element may contain further security substances that are activated, exposed, covered, partially destroyed or removed in at least one of the steps a) or b).
  • the invention also encompasses a security element with an optically variable structure, which contains a marking structure with a plurality of flat markings and a relief structure with a plurality of raised relief elements, wherein the marking structure and the relief structure are combined in such a way that different information is visible from different viewing directions.
  • the marking structure and / or the relief structure is provided with an individualization identifier, which is generated by a non-contact method or a printing method without a fixed printing plate.
  • the relief elements of the relief structure and / or the flat markings of the marking structure are advantageously arranged in the form of a grid, preferably in the form of a grid with a constant spatial frequency.
  • the rasters of the relief structure and the marking structure can have the same spatial frequency or, for the generation of beat or moiré effects, slightly different spatial frequencies.
  • the flat markings are expediently arranged at least partially on flanks of the relief elements, wherein a relief element and an on at least one of its flanks arranged flat marking together form a structural element.
  • the flat markers advantageously have at least one colored surface. Often it will be useful to form the flat markings with several colored surfaces, which are at least partially arranged on different flanks of the relief elements, so that the viewer wins different color impressions from different viewing directions.
  • the optically variable structure contains a plurality of structural elements (ie relief elements with flat markings arranged on at least one of their flanks), which represent a multicolored image motif whose visual impression varies when the viewing angle is changed.
  • the individualization identifier may include letters, numbers or a symbol code, such as a bar code or matrix code. It can also have several components that are recognizable only at different viewing angles. For example, the customization flag may represent a digit that appears in a different color depending on the viewing angles, or it may include two or more different icons, each recognizable from different directions.
  • the relief structure and the marking structure can be arranged on a single-layered or multi-layered substrate, or on a substrate which is mono- or multilayer-coated, printed, glued, laminated or laminated.
  • the substrate and / or the surface of the security element can also have further, in particular machine-readable security features, in order to further increase the security against counterfeiting.
  • the marking structure and the relief structure are combined with one or more further layers, which represent a visually recognizable pattern or image when viewed vertically.
  • the raised relief elements of the relief structure may advantageously be formed tactile detectable.
  • the height of this tactile marking above the surface can be widely varied by the choice of laser parameters, substrate material, and the relative speed of laser beam and substrate in laser marking. Typically, a height between 30 microns and about 100 microns is chosen.
  • the relief structure may in particular contain a plurality of non-linear relief elements, wherein advantageously at least a portion of the non-linear relief elements substantially the shape of a tetrahedron, a spherical section, a truncated pyramid, a truncated cone, a cylindrical section, a Torusabitess, an oval, a Having drop or a pyramid.
  • the relief structure can be subdivided into partial regions in which different partial relief structures are arranged.
  • the partial relief structures can each form a grid of the same raster width and the rasters of the partial relief structures in at least two adjoining partial areas by a fraction of the Grid width, in particular by about one-third of the grid width, be arranged offset.
  • the invention further includes a data carrier, in particular a value document, such as a banknote, identity card or the like, with a security element of the type described above.
  • a data carrier in particular a value document, such as a banknote, identity card or the like, with a security element of the type described above.
  • FIG. 1 is a schematic representation of a banknote with a security element according to an embodiment of the invention
  • FIG. 3 is a detail of only the relief structure of the security element of FIG. 1 in plan view
  • FIG. 5 shows the combination of the relief structure of FIG. 3 and the marking structure of FIG. 4
  • FIG. 6 is a plan view of a security element according to an embodiment of the invention in a schematic representation
  • FIG. 7 shows a representation as in FIG. 5 for a security element according to a further exemplary embodiment of the invention
  • FIG. 10 shows the combination of the marking structure of FIG. 8 and the relief structure of FIG. 9, FIG.
  • Fig. 11 in (a) and (b) are schematic plan views of the basic grid of
  • FIG. 13 shows a security element according to yet a further exemplary embodiment of the invention, wherein (a) shows the image impression when viewed perpendicularly (b), and (c) shows the image impression when viewed at an oblique angle (d), and
  • FIG. 14 shows a further development of the security element of FIG. 12.
  • the invention will now be explained using the example of a banknote. 1 shows a banknote 10 with a security element 12 according to the invention, which is arranged in the print image area 14 of the banknote.
  • the security element 12 contains an optically variable structure which presents different information to the viewer under different viewing directions and thus exhibits a tilting effect.
  • Such security elements are often used in banknotes and other monetary documents, since the tilting effect can be easily visually recognized and checked by the viewer, but he just because of the directional dependence of the visual impression with today's photocopiers, the optically variable structure of only one line of sight reproduce, can not be reproduced.
  • the optically variable structure of the security element 12 moreover has an individualization identifier that is characteristic of the individual data carrier.
  • banknotes can be all or part of the serial number; for identity documents, the individualization can contain personal data or a portrait.
  • this individualization code in the optically variable structure this is, as explained in detail below, generated in at least one of the steps for producing the optically variable structure with a non-contact method or a printing method without fixed printing form.
  • FIG. 2 shows a schematic sectional view taken along the line II-II of Fig. 1.
  • FIG. 3 shows a detail of only the relief structure of the security element 12 in a top view;
  • FIG. 4 shows a detail of only the marking element;
  • 5 shows the combination of the relief structure of FIG. 3 with the marking structure of FIG. 4.
  • the optically variable structure 20 has a plurality of raised relief elements 22, which can be produced, for example, by embossing the banknote 10. If the banknote is mechanically deformed with an embossing tool, the underside of the banknote shows corresponding negative deformations, which, however, are not essential in the context of the present invention and are therefore not shown in the figures. If the relief elements are produced in a different way, for example by the action of a laser beam on the substrate material, then as a rule no corresponding deformations occur on the banknote backside.
  • the optically variable structure 20 further includes a marking structure with a plurality of flat marks 24, 26 which are arranged on different flanks of the relief elements 22 and thus give the security element a different appearance depending on the viewing direction.
  • Figures 3 and 4 show for illustrative purposes a section of the relief structure and the marking structure in plan view, wherein the dashed lines drawn square grid is only the clearer representation.
  • Both the relief elements 22 and the flat markings 24, 26 are arranged in a grid with a constant spatial frequency whose horizontal and vertical grid width are given by values x and y, respectively.
  • the spatial frequency of the marking structure is related to an imaginary reference point 28 in the center of each grid square.
  • the flat markings 24, 26 themselves can assume different positions within the grid squares, in order to come to lie on different flanks of the relief elements. If, for example, the marking structure of FIG. 4 is combined with the relief structure of FIG. 3, the flat markings 24 and 26 come to lie on opposite flanks of the relief elements 22, as shown in FIGS. 2 and 5.
  • a relief element 22 together with the flat marking 24 or 26 arranged on one of its flanks, forms a structural element 32, wherein the structural elements 32, as the smallest units, form the pixels of the rasterized information represented overall by the optically variable structure.
  • the markers 24 When viewed from a first viewing direction 30 (FIG. 2), the markers 24 in particular determine the image impression, while the markings 26 are hardly or not at all visible. By contrast, when the structure is viewed from an opposite viewing direction, the markers 26 in particular determine the image impression, while the markings 24 contribute little or not at all.
  • an individualization mark with a tilting effect can thus be integrated into the optically variable structure 20 of the security element 12.
  • the individual information is obtained by color change or color removal in relief structures introduced, which were embossed with or without flat color layers in substrates.
  • a laser absorbing, for example, black ink layer 42 is first printed on a substrate 40, which can be locally removed or modified in a later step by the action of laser radiation, so that a local color change occurs at the location of the laser application.
  • Relief structures are then embossed into the printed substrate, in the exemplary embodiment in the form of a regular dimpled relief 22, as shown in FIGS. 2 and 3.
  • the printed and embossed substrate is then applied to generate the flat markings with laser radiation according to a predetermined dot screen, wherein the reference points of the dot screen template have the same screen widths x and y as the knob relief 22.
  • the black color layer 42 is locally removed by the laser application, so that the white background layer of the substrate emerges at the marked locations 22, 24, as shown in FIG.
  • a different colored, non-absorbing ink layer can be arranged, which is exposed by the laser exposure locally.
  • a local color change in the color layer 42 can be induced by the laser radiation without ablation.
  • the color layer may comprise a color mixture with a mixture component which absorbs the laser radiation and a mixture component which is transparent for the laser radiation, the absorbing mixture component bleaching, evaporating under the action of the laser radiation and having its reflection properties. Shafts can be changed or converted by a chemical reaction in a material with different optical properties, so that visually recognizable flat marks arise.
  • the flat markings of the dot screen pattern are not all located at the reference point to represent information. Rather, as shown in Fig. 6, a first subgroup 46 of the flat marks is shifted from the reference point by (+ x / 4, + y / 4) to the upper right while a second subset 48 of the flat marks is from the reference point at (-x / 4, -y / 4), so moved to the lower left.
  • the first and second subgroups of flat marks thus come to lie on opposite flanks of the relief elements 22.
  • the relief elements 22 printed with the black ink layer 42 are shown unfilled in FIG. 6, while the flat markings 22, 24 in which the color coating has been removed, and thus appear bright to the viewer, are shown diagrammatically in FIG Fig. 6 are shown filled.
  • the first and second subgroups of flat markers 46, 48 together form the information that is written to the optically variable structure by the laser as individual identifiers. 6, the two subgroups 46, 48 together form the number "5.”
  • the observer When viewed from the direction 50, the observer mainly looks at the bright markings 26 of the first subgroup 46, while the marking subdivisions 24 of the second subgroup 48 lie on the side facing away from the viewer edge of the relief elements 22. The numeral "5" therefore appears dark from this background against a light background.
  • Attachment of the flat mark 24, 26 in place can be assisted by coating the substrate 40 to match the relief structure 22 so that, for example, certain spots will take on color while others will not.
  • the coating can advantageously be arranged such that certain points absorb laser radiation at a certain parameter set (for example from energy and / or wavelength and / or pulse length) and thus undergo a color change, but others only other parameter set.
  • Possible register problems can also be reduced by determining the position of the given grid by means of suitable metrological measures. For this purpose, for example, register marks with the relief-giving operation can be introduced, which are then read out before applying the flat markings 24, 26 by suitable sensors, or industrial image processing can be used to determine the position of the predetermined relief 22. Since non-contact and / or digital printing methods can work without a fixed original, not only the content but also the position of the flat marking can be determined shortly before application and thus adapted to the actual position of the relief.
  • the information to be applied may be based on data which is read from it during the transport of the substrate 40, and then applied corresponding to this information.
  • the serial number of a banknote can be read before lasering and then the final digit can be lasered into the nubs 22 as information.
  • the information can also arise from the fact that the lasered dots have different size or shape or are pulled together into lines. It can arise, for example, by color removal, color relief or a change in the color impression, all of these variants being subsumed under the term "color change" in the present description.
  • the laser can also be the ink-jet process or another digital printing process occur that works with so little pressure that the relief structures are not destroyed. Normally, this creates dark structures on a bright, embossed substrate.
  • sequence of operations can also be reversed. Typically, however, the sequence described is preferred, since then the individualization takes place as the last printing process.
  • the relief elements 22 may also be provided with markings 24, 26 at two or more different locations, as shown in the embodiment of FIG. In this case, depending on the perspective different pictures.
  • a first symbol such as a number
  • a second symbol such as a letter
  • the first or second symbol is then perceived.
  • the preprinted ink may also be made as a screen printing ink containing feature or effect pigments. It is essential for the present embodiment only that this color can be edited using the laser. In this way, the necessary resolution for tilting elements can be achieved, even if pressure screens with a large mesh size must be used for the printing in order to take account of the larger pigment size.
  • Another possibility for introducing the individual information into the optically variable structure is to introduce the relief structures contactlessly into substrates already provided with flat markings, as will now be described with reference to FIGS. 8 to 10.
  • a substrate is provided at regular intervals of a certain spatial frequency with flat marks, for example in the form of different colored circles 60, as shown in Fig. 8.
  • flat marks for example in the form of different colored circles 60, as shown in Fig. 8.
  • all conventional printing methods of suitable resolution can be used.
  • a relief structure with raised relief elements 62, 64 is produced in the substrate by application of laser radiation, as shown in FIG. 9.
  • the grid widths x, y of the relief structure are selected to be identical to the grid widths x, y of the marking structure.
  • the laser parameters for generating the relief structure are matched to the composition and properties of the substrate, reference being made to the documents DE 10247591 A1 or DE 3213315 A1 for details of the methods known per se.
  • the laser parameters and the properties of the printing inks used for the flat markings are coordinated so that the printing inks used do not or only slightly reduce the laser radiation. so that they are not or only slightly changed or removed by the laser radiation.
  • the relief structure in this exemplary embodiment contains a first and a second subgroup of relief elements 62 and 64, which are offset from one another by half the grid width.
  • the two subgroups of the relief elements 62, 64 may represent the shape of the desired individualization identifier, for example a number, a letter or another symbol.
  • the sections of FIGS. 8 to 10 show, for example, a part of an optically color-variable representation of a number "5".
  • the printed dots 60 can also land on the middle of the studs 64, 66 and in the valley between the studs and thus no clearly visible tilting effect arises. Therefore, a plurality of identical or similar fields can be created in which the lasered knob pattern, for example, each shifted by 1/3 of the screen widths in different directions. Similarly, the pre-printed dot matrix 60 could have these shifts in different fields.
  • the inscribed individual information can also arise because the lasered knobs, for example, have different size or shape or z. As drawn into strokes or "worms" become.
  • the pre-printed dots 60 can also be provided with nubs at two or more different locations, so that different images are produced depending on the viewing angle. So z. For example, a number may be composed of pimples, which appear below the dots in the bottom left corner, another one made of pimples, which appear at the top right. Depending on the angle of view, one or the other number is then perceived.
  • the individual information can be generated in further embodiments of the invention in the form of a color or relief change to existing tilting images.
  • a conventional tilt image is first produced according to the prior art and the individualization identifier is then determined by a non-contact and / or digital process in the form of an information-bearing marking structure (such as in FIGS. 2 to 7) or in the form of an information-containing relief structure (FIG. as in Figs. 8-10). This creates additional information within the specified tilting image that generates its own tilting effect.
  • the inscribed, in particular lasered, information can also be produced here by color change (color removal, lightening or a change in the color impression).
  • the information can also be arise from the fact that other shapes are lasered as dots or lines or different sizes or line weights are used.
  • a variant of the invention arises when one or more further layers are pre-printed in front of the information-carrying printing passes. Then, either this layer can be changed while affecting overlying layers, or it can be exposed, depending on which of the layers is absorbent. If there are more layers underneath, they can be uncovered.
  • One of the layers may also contain a feature color that can be seen or detected only with engineering tools and is affected or exposed by the lasering.
  • the relief structure and the marking structure are produced by means of the same non-contact method, in particular by means of laser application, so that register problems are inherently avoided.
  • the individual information can be represented by the relief structure or the marking structure.
  • a relief structure is produced in the substrate by applying coated substrates in each case.
  • the coating is chosen so that by the laser radiation in the same operation a color change (color removal, - lightening, bleaching) can be generated.
  • the flat markings or vice versa can be introduced, depending on how it appears technically advantageous. In most cases it will be to bring in the flat marks first.
  • the arrangement of the two parts of the resulting tilting image can match the illustrations and examples described above, so that the flat markings consist of points that appear on the flanks of relief-forming nubs.
  • the information content can be either in the arrangement of the flat markings or in the arrangement of the relief elements.
  • effect colors can be used as a background.
  • the basic grid can be aligned horizontally and vertically, as shown in Fig. Ll (a), in which the reference numeral 70 designates the relief elements and the reference numeral 72, the flat marks.
  • the pattern must be flipped "over the corner" to view the different states as indicated by arrows 74. If desired, the pattern should be topped off, as may be performed involuntarily by the viewer bottom tilted vertically, it is advantageous to arrange the basic grid rotated by 45 °, as shown in Fig. 11 (b)
  • the arrangement of the information "on the corner", ie on the diagonal has the advantage that more space is available for the information to be presented.
  • the relief element expands each of the brightened spot. It is also possible to use auxiliaries in the substrate which support the relief image; in this case, a lower energy will be used for this, resulting in a less extensive color removal, so that the area used for the flat marking receives a greater share of the total color removal and the information contained in the flat marking is more visible.
  • the height, the extent and the brightness of the relief elements 70 and the extent and the brightness of the flat markings 72 can also be varied such that a raster image is produced in the manner of an autotypic raster (i.e., the same spacing of the raster points at different point sizes). In this way, the observer in supervision will only perceive the raster image, but when tilting, there will be further information.
  • the inscribed individual infomation does not initially or only with difficulty appear in supervision.
  • the laser parameters are selected so that the relief structure 70 and the flat marking structure in the coated substrate have the same or at least a similar gray value. Then, in certain areas 76, the arrangement of the relief elements 70 and the flat marking 72 interchanged. At an oblique angle, information can be seen that, depending on the angle of view and light, appears bright on a dark background or dark on a light background.
  • the relief elements and the flat markings are each arranged in a constant grid.
  • the different impression of brightness arises only through a variation of height, extent and brightness of the relief elements and of the extent and brightness of the flat markings.
  • the area 82 the outline of which represents individual information, in the exemplary embodiment the figure "5", the arrangement of the relief elements and the flat markings is interchanged, as shown in FIG.
  • the optically variable structure contains additional information which can be recognized, for example, in the horizontal tilting direction.
  • 14 shows an extension of the exemplary embodiment of FIG. 12, that is to say a relief structure with reference to FIG.
  • elements 70 and a marking structure with flat markings 72 were exchanged, the arrangement of the relief elements 70 and the flat markings 72 in certain regions 76 being interchanged with one another.
  • additional markings 78 are provided perpendicular to the connecting line of the relief elements and the flat markings, which may contain further information.
  • This further information lies outside the flanks of the relief elements 70 and is therefore easy to see even when viewed vertically.
  • the further information can therefore be used to display image contents, above all in the top view, which initially distract the observer's eye from the actual tipping information.
  • the additional markers 78 may also be attached only at certain locations or reinforced at certain locations. It is also possible to arrange the additional markings 78 and the tilting patterns 70, 72 in such a way that they complement each other.
  • the additional markings 78 can also be used to lighten the overall appearance of a security element or to further match the gray values of flat markings and relief elements. For this purpose, size and color removal of these additional marks can be adjusted accordingly.
  • the contrast arising when tilting can be improved by adjusting the area ratio of the light markings (flat and relief) to the brightness impression of the total area.
  • the brightness is described in grayscale.
  • the so-called simple contrast is thus the ratio of gray scale the bright points (Gh) to the middle gray scale of the total area (G m ) formed:
  • preferred screen rulings are between about 0.4 mm and 1.2 mm, with the range between 0.5 mm and 1 mm being particularly preferred.
  • the overall brightness can be lowered by using the darkest possible shade with the highest possible saturation for the background color. It is particularly advantageous to use the method of intaglio printing used in security printing, which due to the high layer thicknesses allows good saturation. Since it is problematic with conventionally produced intaglio printing plates to print surfaces, methods are preferred which allow a small-scale structuring even of deeper surfaces and thus produce defined inking patterns, as for example in the publications DE 10044 711 A1 or DE 19845440 A1 described, the disclosure of which is included in the present application in this respect.
  • the substrate instead of coating the substrate with a laser-sensitive layer, it is also possible to use substrates which respond to the laser application with blackening or coloring. Also in this variant of the invention, the order of the generation of the two parts relief and flat marking is free.
  • the arrangement of the two parts for example, again correspond to the illustrations shown above.
  • the substrate may be admixed with additives that assist in the production of relieves.
  • additives that assist in the production of relieves.
  • dyes or pigments can be used with great advantage, which can appear at different power or energy density of the laser a different color change, or those that do so depending on other laser parameters, such as wavelength or pulse duration, etc.
  • substrates that react to different laser power or energy densities even without special additives with different color impressions.
  • plastics can be used for this, into which relief structures are introduced at high power or energy density by forming bubbles in the substrate by expansion of gases. These generally have a whitish color impression due to light scattering. A lesser-energy, however, flat marking results in a color change to darker shades.
  • PVC, polycarbonate or PET variants are particularly suitable here.
  • a flat mark may first be lasered to remove the ink.
  • the flat mark also contains the location of the relief structure. Then the relief structure is lasered into the exposed substrate, where it again produces a blackening or a color change.

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  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un élément de sécurité présentant une structure optiquement variable pourvue d'une marque d'individualisation, lequel procédé consiste a) à doter un substrat d'une structure de marquage présentant une pluralité de marques plates et b) à doter ce substrat d'une structure en relief présentant une pluralité d'éléments en relief. La structure de marquage et la structure en relief sont combinées, de sorte que différentes informations sont visibles sous différents angles de vue, et la marque d'individualisation est produite lors d'au moins une des étapes de travail a) ou b) par un procédé sans contact ou par un procédé d'impression sans forme imprimante fixe.
PCT/EP2006/010088 2005-11-02 2006-10-19 Element de securite et procede de fabrication dudit element WO2007051530A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP06806394A EP1945466B1 (fr) 2005-11-02 2006-10-19 Element de securite et procede de fabrication dudit element
CA002627902A CA2627902A1 (fr) 2005-11-02 2006-10-19 Element de securite et procede de fabrication dudit element
DE502006007502T DE502006007502D1 (en) 2005-11-02 2006-10-19 Lung
AT06806394T ATE474724T1 (de) 2005-11-02 2006-10-19 Sicherheitselement und verfahren zu seiner herstellung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005052562.8 2005-11-02
DE102005052562A DE102005052562A1 (de) 2005-11-02 2005-11-02 Sicherheitselement und Verfahren zu seiner Herstellung

Publications (2)

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WO2007051530A2 true WO2007051530A2 (fr) 2007-05-10
WO2007051530A3 WO2007051530A3 (fr) 2007-07-19

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EP (1) EP1945466B1 (fr)
AT (1) ATE474724T1 (fr)
CA (1) CA2627902A1 (fr)
DE (2) DE102005052562A1 (fr)
RU (1) RU2412824C2 (fr)
WO (1) WO2007051530A2 (fr)

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US11766885B2 (en) * 2018-09-12 2023-09-26 Veridos Gmbh Security document and method for producing a security document

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DE102007029203A1 (de) 2007-06-25 2009-01-08 Giesecke & Devrient Gmbh Sicherheitselement
DE102007029204A1 (de) 2007-06-25 2009-01-08 Giesecke & Devrient Gmbh Sicherheitselement
DE102007048366A1 (de) * 2007-10-09 2009-04-16 Interprint Gmbh & Co Kg Verfahren zur Einbringung einer versteckten Kennzeichnung in ein Druckprodukt sowie Verfahren zur Sichtbarmachung der versteckten Kennzeichnung
DE102007062089A1 (de) 2007-12-21 2009-07-02 Giesecke & Devrient Gmbh Verfahren zum Erzeugen einer Mikrostruktur
DE102008029638A1 (de) 2008-06-23 2009-12-24 Giesecke & Devrient Gmbh Sicherheitselement
DE102008046511A1 (de) * 2008-09-10 2010-03-11 Giesecke & Devrient Gmbh Darstellungsanordnung
PL2322355T3 (pl) * 2009-11-13 2015-08-31 Polska Wytwornia Papierow Wartosciowych S A Sposób wykonywania obrazu z efektem kątowym oraz podłoże dokumentu z obrazem z efektem kątowym
RU2450936C1 (ru) * 2011-06-08 2012-05-20 Федеральное Государственное Унитарное Предприятие "Гознак" (Фгуп "Гознак") Носитель информации с оптически переменным пигментом и способ изготовления носителя информации с оптически переменным пигментом
RU2510438C1 (ru) * 2013-04-04 2014-03-27 Федеральное Государственное Унитарное Предприятие "Гознак" (Фгуп "Гознак") Полимерный многослойный элемент для бумаги, обладающий оптически переменным эффектом
RU2568708C2 (ru) * 2014-03-18 2015-11-20 Федеральное Государственное Унитарное Предприятие "Гознак" (Фгуп "Гознак") Многослойный полимерный защитный элемент
DE102015014039A1 (de) * 2015-10-30 2017-05-04 Giesecke & Devrient Gmbh Sicherheitselement mit einer optisch variablen Struktur
DE102017009092A1 (de) * 2017-09-28 2019-03-28 Giesecke+Devrient Currency Technology Gmbh Verfahren zur Herstellung eines optisch variablen Elements sowie entsprechendes Element
DE102019124762B4 (de) * 2019-09-13 2021-04-15 Bundesdruckerei Gmbh Wert- oder sicherheitsprodukt sowie verfahren zu dessen herstellung

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DE69209185T2 (de) 1991-07-30 1996-08-01 Ferchim Eng Sa Verfahren zur Herstellung von Gegenständen mit oberflächlichen Relief-Mustern
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EP0801604B1 (fr) 1995-11-03 2003-09-24 Giesecke & Devrient GmbH Support de donnees portant un element optiquement variable
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DE69209185T2 (de) 1991-07-30 1996-08-01 Ferchim Eng Sa Verfahren zur Herstellung von Gegenständen mit oberflächlichen Relief-Mustern
EP0801604B1 (fr) 1995-11-03 2003-09-24 Giesecke & Devrient GmbH Support de donnees portant un element optiquement variable
DE19947425A1 (de) 1999-10-03 2001-04-05 Ralf Paugstadt Verfahren zur Herstellung einer farbvariablen Oberfläche
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Also Published As

Publication number Publication date
DE502006007502D1 (en) 2010-09-02
RU2008120809A (ru) 2009-12-10
EP1945466B1 (fr) 2010-07-21
ATE474724T1 (de) 2010-08-15
EP1945466A2 (fr) 2008-07-23
CA2627902A1 (fr) 2007-05-10
RU2412824C2 (ru) 2011-02-27
DE102005052562A1 (de) 2007-05-03
WO2007051530A3 (fr) 2007-07-19

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