EP1467871A1 - Steel gravure method for the production of a security document, steel gravure plate and semi-product for the same and method for production thereof - Google Patents

Steel gravure method for the production of a security document, steel gravure plate and semi-product for the same and method for production thereof

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Publication number
EP1467871A1
EP1467871A1 EP03702402A EP03702402A EP1467871A1 EP 1467871 A1 EP1467871 A1 EP 1467871A1 EP 03702402 A EP03702402 A EP 03702402A EP 03702402 A EP03702402 A EP 03702402A EP 1467871 A1 EP1467871 A1 EP 1467871A1
Authority
EP
European Patent Office
Prior art keywords
structures
printing plate
embossing
embossed
steel
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.)
Granted
Application number
EP03702402A
Other languages
German (de)
French (fr)
Other versions
EP1467871B2 (en
EP1467871B1 (en
Inventor
Eckhard Braun
Reinhard Plaschka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and 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
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Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP1467871A1 publication Critical patent/EP1467871A1/en
Application granted granted Critical
Publication of EP1467871B1 publication Critical patent/EP1467871B1/en
Publication of EP1467871B2 publication Critical patent/EP1467871B2/en
Anticipated expiration legal-status Critical
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Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/24—Inking and printing with a printer's forme combined with embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • 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
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/04—Printing plates or foils; Materials therefor metallic
    • B41N1/06—Printing plates or foils; Materials therefor metallic for relief printing or intaglio printing
    • 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
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/43—Machines printing by both intaglio and another type of printing means

Definitions

  • the invention relates to a method for producing a security document, in particular a security such as a bank note, check and the like, with a printed image applied using the steel gravure printing method and with an embossed microstructure area, the structures of which are of the order of magnitude of less than 100 ⁇ m.
  • the invention further relates to tools suitable for the manufacturing process, namely steel gravure printing plates, and their manufacture, including semi-finished products, namely originals and intermediate forms for the manufacture of steel intaglio printing plates and the security documents produced therewith.
  • the steel gravure corresponds to the intaglio printing, whereby the printing plate is made of steel. In this way, a longer service life of the printing plate is achieved and the long runs required for printing securities and in particular banknote printing are made possible.
  • Blind embossing is sometimes produced together with the steel intaglio print in a common printing process using a single, partially colored steel intaglio printing plate.
  • the paper is pressed into the depressions in the blind embossing areas and thus permanently deformed.
  • the blind embossing areas of the printing plate are not filled with ink, see above that the substrate material of the security document is only permanently deformed, that is, embossed, in these areas (WO 97/48555; DE-A-19845 552).
  • blind embossing there are special three-dimensional optical impressions due to light and shadow effects.
  • blind embossing with the appropriate dimensions can also be easily detected tactilely.
  • the structures for the steel intaglio printing image and for the blind embossing are usually introduced into the surface of the printing plate by means of a stylus, laser or in the etching process. Regardless of the insertion technique used, these structures are also generally referred to below as “engravings”. However, the fineness of the structures is limited, on the one hand by the engraving techniques used themselves, and on the other hand by the fact that particularly fine structures also contribute to the mechanical influences of the wiping cylinder The excess printing ink is wiped off the partially colored printing plate in the long run.
  • embossed structures with a size of significantly less than 100 ⁇ m (hereinafter referred to as "Microstructures" referred to) damaged in the shortest possible time. Accordingly, embossments with microstructures are produced which are significantly smaller than 100 ⁇ m in order to produce special optical effects in an embossing process which is carried out separately from the printing process for applying the steel intaglio image.
  • DE-A-19845 552 proposes to prefabricate a security with all security elements, including, for example, embossed diffraction structures, and to print the paper as a last process step, for example using the steel gravure printing process.
  • the diffraction structures are built up in layers on a previously locally smoothed area of the security substrate by first applying a curable lacquer to the smoothed area and providing it with an extremely thin, reflective metal layer.
  • a diffraction-optical relief structure is then embossed into this coated lacquer layer using an embossing stamp, and the diffraction structure thus produced is then covered with a protective lacquer.
  • embossed microstructures in a security document be it as blind embossing in the substrate material itself or as a diffraction-optical relief structure in a lacquer layer specially provided for this, therefore requires a separate work step in addition to the printing process for producing the steel intaglio print image.
  • the object of the present invention is to propose a method for producing a security document with which steel intaglio printing images and embossed microstructures can be produced more easily.
  • a further task consists in proposing tools for carrying out the method and a method for producing these tools and their semi-finished products.
  • the steel intaglio printing image and the embossed microstructures are produced in a common printing process using a common printing plate, in which both the printing image engraving and the microstructures are present.
  • the microstructures are slightly lowered relative to the printing plate surface, so that they are removed from the
  • Wiping cylinders are not detected, but still allow a perfect embossing process.
  • the dimension of the rearward offset of the microstructures depends on the surface size of the microstructures area "on the one hand and on the other hand, on the compressibility of the wiping cylinder material and the Wischzylinderanpress horr.
  • the microstructures should therefore about 20 microns to 100 microns below the printing plate surface are preferably rnindants 40 microns and a maximum of 60 .mu.m,
  • This information relates to the components of the microstructures closest to the printing plate surface, for example a square microstructure area should have an area of less than 100 mm 2 in order to prevent the wiping cylinder from penetrating down to the lower-lying microstructures, or in other words, the dimension of the microstructure -
  • the area in the direction parallel to the axis of rotation of the wiper cylinder and parallel to the printing plate surface should be less than 10 mm.
  • microstructure areas can together form a larger microstructure area, the individual microstructure areas being separated by webs reaching up to the printing plate surface.
  • the webs have such a width on the printing plate surface that they are Can carry wiping cylinders without being permanently damaged by their contact pressure. In this way, an arbitrarily shaped and arbitrarily large area matrix can be generated from smaller microstructure areas.
  • the dimensions of the microstructures i.e. their height and / or lateral structure size are preferably in the order of magnitude between 5 ⁇ m and 100 ⁇ m if simple blind embossing is to be produced. If, on the other hand, the microstructures are to be used to emboss a diffraction-optical relief structure, for example in a lacquer layer that may have been metallized and specially applied for this purpose on the security document material, the order of magnitude of the microstructures in the wave-optical range is at and below 1 ⁇ m.
  • the invention provides for a two-stage printing plate production.
  • an original printing plate with the print image engraving and, on the other hand, one or more embossing stamps with the microstructures are produced separately in a conventional manner, and the original printing plate or a material molded thereon is then combined with the original embossing stamp or duplicate stamps.
  • intermediate forms are first embossed with the original printing plate.
  • many materials are embossed as the finished intaglio printing plate should have benefits.
  • a number of duplicates corresponding to the benefits of the steel intaglio printing plate are also produced from the microstructure embossing stamps.
  • the mater which is then combined with the duplicates of the microstructure embossing stamps, for example by arranging them side by side and connecting them appropriately. This complex then serves as the actual intermediate form for re-forming one or more duplicate printing plates, which are then used as deep steel printing plates in the printing units.
  • one or more areas are removed from the original printing plate into which the printed image is engraved, into which the original microstructure embossing star is inserted in such a way that the microstructures lie below the plate surface.
  • the maters are then formed by the resulting complex.
  • a number of maters assembled in the desired arrangement of sheets then form the intermediate form for producing the steel intaglio printing plates.
  • the printing plate can be engraved directly with the micro-embossed structures which are lower than the non-engraved printing plate level.
  • a precondition is the use of a precision engraving device, since standard devices for the engraving of intaglio printing plates do not have sufficient accuracy to reproducibly produce predetermined structures whose dimensions are smaller than 100 ⁇ m. Precision engraving can be done by mechanical, i.e. cutting engraving as well as laser engraving.
  • the areas provided for the embossing microstructures can first be removed by the amount by which the reduction is to take place. In this below the level of the unprocessed printing plate The microstructures are then introduced into the surface areas by precision engraving. In principle, it is also possible to first create the microstructures in the specified target depth and, if necessary, then to remove any remaining printing plate material in order to achieve the desired reduction in one area.
  • the printing plate original with the microstructures can be used directly as a combined printing and embossing plate. However, the original can also be reproduced using the usual reproduction and impression techniques.
  • the intaglio printing plates according to the invention guarantee, even after long runs, concise embossed structures with high sharpness of contours on the securities produced with them.
  • the substrate material for example cotton paper
  • the substrate material for example cotton paper
  • the lowering of the embossed structures in the printing plate in the corresponding area of the processed substrate causes an area that is not or at least less compressed, from which the embossed microstructures rise.
  • the embossed microstructures can be provided with stabilizing protective layers.
  • Fig. 1 is a banknote with a steel gravure print and embossed Microstructures
  • FIG. 2 shows the banknote from FIG. 1 in cross section, the microstructures being blind embossed
  • FIG. 5 shows a bank note, similar to the bank note from FIG. 1 with a plurality of microstructure regions spaced apart from one another, and
  • FIG. 1 shows, by way of example, as one of many possible types of security documents, a banknote in plan view with a printed image 1 produced in the steel intaglio printing process and a microstructure embossing 2 also produced in the steel intaglio printing process plastic layer applied to the paper substrate.
  • FIG. 2 shows a cross section through the banknote from FIG. 1, the microstructure embossing 2 being blind embossing in the surface of the banknote Substrate 3 is present.
  • the printing ink applied in the steel gravure printing process and forming the printed image 1 “stands” on the surface of the substrate 3 and can therefore be detected by tactile means.
  • the raised microstructure of microstructure embossing 2 is, for example, a line grid with a grid width in the range from 5 to 100 ⁇ m. Such a structure is visually perceptible as a fine light / shadow pattern and the surface can also be tactilely distinguished from the surrounding, unembossed surface.
  • FIGS. 3a to 3c An embodiment is shown in FIGS. 3a to 3c, in which the microstructure embossing 2 is designed as a diffraction-optical relief structure.
  • the structures have an order of magnitude of approximately 1 ⁇ m or less than 1 ⁇ m, that is to say in the wavelength range of visible light.
  • 3a shows the still unprinted banknote substrate 3, which is smoothed in a zone 4, so that an embossing lacquer 5 adheres particularly well to the substrate 3 in this area.
  • the embossing lacquer 5 is vapor-coated with a thin metal layer 6.
  • the printed image 1 is applied to the substrate 3 prepared in this way using the steel gravure printing process, and the diffraction-optical microstructure embossing 2 is also applied (FIG. 3b).
  • the microstructure embossing 2 is then covered with a scratch-resistant protective lacquer 7 (FIG. 3c).
  • the printed image 1 and the microstructured embossing 2 according to the exemplary embodiments according to FIGS. 2 and 3a to 3c are produced in a single printing operation using a single printing plate.
  • Suitable pressure plates 8 are shown in cross-section by way of example in FIGS. 4d and 6e.
  • FIG. 4d shows that steel intaglio structures 10 for producing the printed image 1 and on the other hand, microstructures 11 for producing microstructure embossing 2 are present.
  • the microstructures 11 are slightly embedded in the printing plate surface 9, so that the uppermost microstructure regions, that is to say the tips of the microstructure relief, lie at a small distance d below the printing plate surface 9.
  • the distance d measures between 20 and 100 ⁇ m, preferably between 40 and 60 ⁇ m.
  • the printing ink is first partially applied to the printing plate surface 9 in the area of the steel gravure printing structures 10, and excess printing ink is wiped off the printing plate surface 9 by means of a wiping cylinder, not shown.
  • the lowering of the microstructures 11 ensures that the wiping cylinder does not come into contact with the filigree microstructures 11 and cannot damage them.
  • the substrate of the security document is pressed into the steel intaglio structures 10 and into the microstructures 11, whereby on the one hand the ink is absorbed from the steel intaglio structures 10 and adheres to the substrate surface and on the other hand the substrate on its surface in the area of the microstructures 11 shaped, that is permanently deformed, is.
  • the pressures and temperatures of the printing plate cylinder used in the gravure printing process to produce the printed image are suitable for embossing conventional security papers, so that the simultaneous embossing and printing of security paper with a single steel intaglio printing plate is possible without any problems.
  • a typical heating temperature of the plate cylinders is around 80 ° C, but it can also be between 50 and 90 ° C. 4a to 4d and 6a to 6e, two alternative methods for producing the printing plate 8 with deeper microstructures 11 are described below.
  • steel intaglio structures 10 are introduced into an original printing plate O in a conventional manner, for example by means of a stylus or in the etching process.
  • embossing dies D with microstructures 11 are also produced in a conventional manner, for example using the same methods that are usually used to produce diffraction-optical relief structures.
  • duplicates of the original printing plate O and the die D are produced.
  • the duplicate of the original printing plate O that is the Mater M
  • the duplicate of the original printing plate O can be produced, for example, by embossing the original printing plate in a plastically deformable plastic, which then forms the Mater M (Cobex embossing).
  • Mater M Cobex embossing
  • other impression techniques are known and can be used.
  • a number of maters M 1, M 2..., M n corresponding to the number of uses of the steel intaglio printing plate are produced.
  • a corresponding number of duplicate dies DDi, DD 2 ,... Are also produced from the die or dies D with the microstructures 11.
  • the molding process of the duplicate embossing dies DD is preferably carried out galvanoplastic, in that the microstructure 11 is first made electrically conductive and then metallized, for example with copper. The copper layer is then poured over, for example with tin in order to stabilize the structure, and backed with lead or plastic in order to make the duplicate embossing stamp DD manageable.
  • a third step (FIG. 4c), the mats Mi, M2, ... and the duplicate dies DDi, DD 2 , ... are arranged next to each other and firmly connected to one another by suitable connecting techniques, for example gluing, in order to form an intermediate form Z. , In the intermediate form Z shown in FIG.
  • a pair of material and embossing dies M, DDi or M 2 , DD 2 etc. form a use of the steel gravure printing plate 8 to be produced by means of the intermediate form Z. It can be seen that the microstructures that are shown here are present as negative microstructures 11 ', lying slightly above the impression plane 9' of the intermediate form Z.
  • the steel intaglio printing plate 8 is molded from the intermediate form Z (FIG. 4d) again in a galvanoplastic manner in a manner similar to the duplication of the die D.
  • the printing plate surface 9 can be hardened by nickel plating, chrome plating in a further manufacturing step.
  • FIGS. 6a to 6e An alternative method for manufacturing the printing plate 8 is shown in FIGS. 6a to 6e.
  • the original printing plate O with the intaglio printing structures 10 is first produced (FIG. 6a).
  • Certain surface areas are then extracted segment by segment from the original printing plate O, for example using high-precision milling technology (FIG. 6b).
  • the die D with the microstructures 11, as shown in FIG. 4a, is then inserted into the recess 13 thus produced (FIG. 6c).
  • This requires a precise processing of the stamp D so that the microstructures after inserting the stamp D into the recess 13 are a defined distance d lower than the surface of the original printing plate O.
  • the original printing plate O prepared in this way is then used to stamp Mat M ( 6d), the embossing again being carried out, for example, in the cobex embossing process.
  • each Mater M is used for further production.
  • the materials Mi, M2, M3, ... are in turn assembled by suitable connection techniques to form an intermediate form Z (FIG. 6e), from which the steel intaglio printing plate 8 is electroplated.
  • the stamping of the original plate from FIG. 6c into a sufficiently large intermediate shape Z can be repeated in accordance with the number of desired uses.
  • the step of joining the individual maters Mi, M2, M3, ... to the intermediate form Z is omitted.
  • a steel intaglio printing plate 8 for producing a printed image 1 with microstructure embossments 2 integrated therein, as shown in FIG. 5, can be produced particularly well by a production method according to FIGS the steel intaglio d 1, which is indicated in FIG. 5 only by its outer border, several microstructure embossments 2 form a field of microstructure embossments in which the individual microstructure embossments embossings 2 are spaced apart.
  • These distances 12 ' are a consequence of the fact that the individual microstructure areas 11 of the steel intaglio printing plate 8 must not exceed a maximum size for protection against damage by a wiping cylinder and are therefore separated from one another by separating webs 12 (FIG. 4d). These separating webs 12 extend to the pressure plate surface 9 and have the necessary width in order to be able to absorb the pressure of the wiping cylinder.

Abstract

A method for producing a security document having printed image 1 produced by steel intaglio printing and embossed microstructures 2 of an order of magnitude of less than 100 microns is carried out by one printing plate 8 on which both the steel intaglio structures and the microstructures are present. The parts of the microstructures closest to printing plate surface 9 are located 20 to 100 microns below the printing plate surface so that they are not touched and destroyed by the wiping cylinder. Alternative methods for producing a steel intaglio printing plate with integrated microstructures are provided. The microstructures can be used for embossing a diffractive relief or a blind embossing.

Description

Stahltiefdruckverfahren zum Herstellen eines Sicherheitsdokuments sowie Stahltiefdruckplatte und Halbzeuge dafür und Verfahren zu deren Herstel- lung Steel intaglio printing process for producing a security document as well as steel intaglio printing plate and semi-finished products therefor and process for their production
Die Erfindung betrifft ein Verfahren zum Herstellen eines Sicherheitsdokuments, insbesondere eines Wertpapiers wie Banknote, Scheck und dergleichen, mit einem im Stahltiefdruckverfahren aufgebrachten Druckbild und mit einem geprägten Mikrostrukturbereich, dessen Strukturen in einer Größenordnung von weniger als 100 μm liegen. Die Erfindung betrifft des Wei- teren für das Herstellungsverfahren geeignete Werkzeuge, nämlich Stahltiefdruckplatten, und deren Herstellung einschließlich Halbzeugen, nämlich Originale und Zwischenformen für die Herstellung der Stahltiefdruckplatten und die damit hergestellten Sicherheitsdokumente. Der Stahltiefdruck entspricht dem Stichtiefdruck, wobei die Druckplatte aus Stahl gefertigt ist. Da- durch wird eine höhere Standzeit der Druckplatte erreicht und die für den Wertpapier- und insbesondere den Banknotendruck erforderlichen hohen Auflagen ermöglicht.The invention relates to a method for producing a security document, in particular a security such as a bank note, check and the like, with a printed image applied using the steel gravure printing method and with an embossed microstructure area, the structures of which are of the order of magnitude of less than 100 μm. The invention further relates to tools suitable for the manufacturing process, namely steel gravure printing plates, and their manufacture, including semi-finished products, namely originals and intermediate forms for the manufacture of steel intaglio printing plates and the security documents produced therewith. The steel gravure corresponds to the intaglio printing, whereby the printing plate is made of steel. In this way, a longer service life of the printing plate is achieved and the long runs required for printing securities and in particular banknote printing are made possible.
Es ist bekannt, Sicherheitsdokumente zusätzlich zu einem im Stahltief druck- verfahren aufgebrachten Druckbild mit besonderen Echtheitsmerkmalen auszustatten, von denen für die vorliegende Erfindung insbesondere optisch variable Elemente, wie z.B. geprägte Hologramme oder GitterIt is known to provide security documents with special authenticity features in addition to a print image applied in the steel deep printing process, of which, in particular, optically variable elements, such as e.g. embossed holograms or grids
(DE-A-4002979) und Blindprägungen (DE-A-19845 552) von Interesse sind.(DE-A-4002979) and blind embossing (DE-A-19845 552) are of interest.
Blindprägungen werden bisweilen zusammen mit dem Stahltiefdruckbild in einem gemeinsamen Druckvorgang unter Verwendung einer einzigen, partiell eingefärbten Stahltiefdruckplatte erzeugt. Beim Druckvorgang wird das Papier in die Vertiefungen der Blindprägungsbereiche hineingepresst und auf diese Weise nachhaltig verformt. Die Blindprägungsbereiche der Druck- platte werden anders als die Druckbildbereiche nicht mit Farbe gefüllt, so dass das Substratmaterial des Sicherheitsdokuments in diesen Bereichen lediglich nachhaltig verformt, das heißt geprägt, wird (WO 97/48555; DE-A-19845 552).Blind embossing is sometimes produced together with the steel intaglio print in a common printing process using a single, partially colored steel intaglio printing plate. During the printing process, the paper is pressed into the depressions in the blind embossing areas and thus permanently deformed. Unlike the print image areas, the blind embossing areas of the printing plate are not filled with ink, see above that the substrate material of the security document is only permanently deformed, that is, embossed, in these areas (WO 97/48555; DE-A-19845 552).
Bei der Betrachtung von Blindprägungen ergeben sich aufgrund von Licht- und Schatteneffekten besondere dreidimensionale optische Eindrücke. Darüber hinaus lassen sich Blindprägungen mit entsprechenden Abmessungen auch taktil leicht erfassen.When considering blind embossing, there are special three-dimensional optical impressions due to light and shadow effects. In addition, blind embossing with the appropriate dimensions can also be easily detected tactilely.
Die Strukturen für das Stahltiefdruckbild und für die Blindprägungen werden üblicherweise mittels eines Stichels, Lasers oder im Ätzverfahren in die Druckplattenoberfläche eingebracht. Unabhängig von der verwendeten Ein- brmgungstechnik werden diese Strukturen nachfolgend auch allgemein als „Gravuren" bezeichnet. Die Feinheit der Strukturen ist allerdings begrenzt, einerseits durch die eingesetzten Graviertechniken selbst, andererseits aber auch dadurch, dass besonders feine Strukturen den mechanischen Einflüssen des Wischzylinders, mit dem überschüssige Druckfarbe von der partiell eingefärbten Druckplatte abgewischt wird, auf Dauer nicht standhalten. Durch die leicht changierende Bewegung und die Friktion, die bei einem entspre- chenden Anpressdruck des Wischzylinders vorherrscht, sind Prägestrukturen mit einer Größenordnung von deutlich weniger als 100 μm (nachfolgend als „MikroStrukturen" bezeichnet) in kürzester Zeit beschädigt. Dementsprechend werden Prägungen mit MikroStrukturen deutlich kleiner 100 μm zur Erzeugung besonderer optischer Effekte in einem von dem Druckvorgang zur Aufbringung des Stahltiefdruckbildes getrennt durchgeführten Prägevorgang erzeugt.The structures for the steel intaglio printing image and for the blind embossing are usually introduced into the surface of the printing plate by means of a stylus, laser or in the etching process. Regardless of the insertion technique used, these structures are also generally referred to below as “engravings”. However, the fineness of the structures is limited, on the one hand by the engraving techniques used themselves, and on the other hand by the fact that particularly fine structures also contribute to the mechanical influences of the wiping cylinder The excess printing ink is wiped off the partially colored printing plate in the long run. Due to the slightly changing movement and the friction that prevails when the wiping cylinder is pressed down accordingly, embossed structures with a size of significantly less than 100 μm (hereinafter referred to as "Microstructures" referred to) damaged in the shortest possible time. Accordingly, embossments with microstructures are produced which are significantly smaller than 100 μm in order to produce special optical effects in an embossing process which is carried out separately from the printing process for applying the steel intaglio image.
Entsprechendes gilt für die Aufbringung von optischen Beugungsstrukturen, wie Hologrammen und Gittern. Die Größenordnung dieser Beugungsstruk- turen liegt im Wellenlängenbereich des sichtbaren Lichts, also unter 1 μm. In der DE-A-19845 552 wird dazu vorgeschlagen, ein Wertpapier mit allen Sicherheitselementen, einschließlich beispielsweise geprägter Beugungsstrukturen, vorzuf ertigen und als letzten Verfahrensschritt das Papier beispiels- weise im Stahltiefdruckverfahren zu bedrucken. In diesem Zusammenhang wird als eine mögliche Variante beschrieben, die Beugungsstrukturen auf einem zuvor lokal geglätteten Bereich des Wertpapiersubstrats schichtweise aufzubauen, indem auf den geglätteten Bereich zunächst ein aushärtbarer Lack aufgetragen und mit einer extrem dünnen, reflektierenden Metall- Schicht versehen wird. In diese beschichtete Lackschicht wird dann mit einem Prägestempel eine beugungsoptische Reliefstruktur eingeprägt, und die so erzeugte Beugungsstruktur wird dann mit einem Schutzlack abgedeckt.The same applies to the application of optical diffraction structures, such as holograms and gratings. The magnitude of this diffraction pattern tures is in the wavelength range of visible light, i.e. less than 1 μm. DE-A-19845 552 proposes to prefabricate a security with all security elements, including, for example, embossed diffraction structures, and to print the paper as a last process step, for example using the steel gravure printing process. In this context, a possible variant is described in which the diffraction structures are built up in layers on a previously locally smoothed area of the security substrate by first applying a curable lacquer to the smoothed area and providing it with an extremely thin, reflective metal layer. A diffraction-optical relief structure is then embossed into this coated lacquer layer using an embossing stamp, and the diffraction structure thus produced is then covered with a protective lacquer.
Das Erzeugen von geprägten MikroStrukturen in einem Sicherheitsdoku- ment, sei es als Blindprägung im Substratmaterial selbst oder als beugungsoptische Relief Struktur in einer dafür speziell vorgesehenen Lackschicht, bedingt somit einen separaten Arbeitsschritt zusätzlich zu dem Druckvorgang zur Erzeugung des Stahltiefdruckbildes.The creation of embossed microstructures in a security document, be it as blind embossing in the substrate material itself or as a diffraction-optical relief structure in a lacquer layer specially provided for this, therefore requires a separate work step in addition to the printing process for producing the steel intaglio print image.
Aufgabe der vorliegenden Erfindung ist es, ein Verfahren zum Herstellen eines Sicherheitsdokuments vorzuschlagen, mit dem Stahltiefdruckbilder und geprägte MikroStrukturen einfacher erzeugbar sind.The object of the present invention is to propose a method for producing a security document with which steel intaglio printing images and embossed microstructures can be produced more easily.
Eine weiter gehende Aufgabe besteht darin, Werkzeuge zur Durchführung des Verfahrens sowie ein Verfahren zur Herstellung dieser Werkzeuge und ihrer Halbzeuge vorzuschlagen.A further task consists in proposing tools for carrying out the method and a method for producing these tools and their semi-finished products.
Diese Aufgaben werden erfindungsgemäß durch die Verfahren und Gegenstände mit den Merkmalen der nebengeordneten Patentansprüche gelöst. In davon abhängigen Ansprüchen sind vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung angegeben.According to the invention, these objects are achieved by the methods and subjects with the features of the independent claims. In dependent claims, advantageous refinements and developments of the invention are specified.
Dementsprechend werden das Stahltiefdruckbild und die geprägten Mi- krostrukturen in einem gemeinsamen Druckvorgang unter Verwendung einer gemeinsamen Druckplatte erzeugt, in der sowohl die Druckbildgravur als auch die MikroStrukturen vorliegen. Um zu verhindern, dass die Mi- krostrukturen durch die Einwirkung eines über die Druckplatte wischenden Wischzylinders beschädigt werden, liegen die MikroStrukturen gegenüber der Druckplattenoberfläche geringfügig abgesenkt, so dass sie vomAccordingly, the steel intaglio printing image and the embossed microstructures are produced in a common printing process using a common printing plate, in which both the printing image engraving and the microstructures are present. In order to prevent the microstructures from being damaged by the action of a wiping cylinder wiping over the printing plate, the microstructures are slightly lowered relative to the printing plate surface, so that they are removed from the
Wischzylinder nicht erf asst werden, aber dennoch einen einwandfreien Prägevorgang ermöglichen. Die Dimension der Zurückversetzung der MikroStrukturen hängt ab von der Flächengröße des Mikrostrukturenbereichs" einerseits und von der Kompressibilität des Wischzylindermaterials und dem Wischzylinderanpressdruck andererseits. Die MikroStrukturen sollten daher etwa 20 μm bis 100 μm unterhalb der Druckplattenoberfläche liegen, vorzugsweise rnindestens 40 μm und maximal 60 μm, wobei sich diese Angaben auf die der Druckplatteiioberfläche nächstliegenden Bestandteile der MikroStrukturen bezieht. Ein quadratischer Mikrostrukturenbereich sollte beispielsweise eine Fläche von weniger als 100 mm2 aufweisen, um ein Vordringen des Wischzylinders bis zu den tiefer liegenden MikroStrukturen auszuschließen. Oder anders ausgedrückt, die Dimension des Mikrostruktu- renbereichs in Richtung parallel zur Rotationsachse des Wischzylinders und parallel zur Druckplattenoberfläche sollte unter 10 mm liegen.Wiping cylinders are not detected, but still allow a perfect embossing process. The dimension of the rearward offset of the microstructures depends on the surface size of the microstructures area "on the one hand and on the other hand, on the compressibility of the wiping cylinder material and the Wischzylinderanpressdruck. The microstructures should therefore about 20 microns to 100 microns below the printing plate surface are preferably rnindestens 40 microns and a maximum of 60 .mu.m, This information relates to the components of the microstructures closest to the printing plate surface, for example a square microstructure area should have an area of less than 100 mm 2 in order to prevent the wiping cylinder from penetrating down to the lower-lying microstructures, or in other words, the dimension of the microstructure - The area in the direction parallel to the axis of rotation of the wiper cylinder and parallel to the printing plate surface should be less than 10 mm.
Mehrere Mikrostrukturenbereiche können zusammen eine größere Mi- krostrukturfläche bilden, wobei die einzelnen Mikrostrukturbereiche durch bis an die Druckplattenoberfläche reichende Stege getrennt sind. Die Stege besitzen an der Druckplattenoberfläche eine solche Breite, dass sie den Wischzylinder tragen können, ohne auf Dauer durch dessen Anpressdruck beschädigt zu werden. Auf diese Weise lässt sich eine beliebig geformte und beliebig große Flächenmatrix aus kleineren Mikrostrukturbereichen erzeugen.Several microstructure areas can together form a larger microstructure area, the individual microstructure areas being separated by webs reaching up to the printing plate surface. The webs have such a width on the printing plate surface that they are Can carry wiping cylinders without being permanently damaged by their contact pressure. In this way, an arbitrarily shaped and arbitrarily large area matrix can be generated from smaller microstructure areas.
Die Abmessungen der MikroStrukturen, d.h. ihre Höhe und/ oder laterale Strukturgröße liegen vorzugsweise in einer Größenordnung zwischen 5 μm und 100 μm, wenn einfache Blindprägungen hergestellt werden sollen. Soll dagegen mit den MikroStrukturen eine beugungsoptische Relief Struktur ge- prägt werden, beispielsweise in eine dafür speziell auf dem Sicherheitsdokumentmaterial applizierte, gegebenenfalls metallisierte Lackschicht, so liegt die Größenordnung der MikroStrukturen im wellenoptischen Bereich bei und unter 1 μm.The dimensions of the microstructures, i.e. their height and / or lateral structure size are preferably in the order of magnitude between 5 μm and 100 μm if simple blind embossing is to be produced. If, on the other hand, the microstructures are to be used to emboss a diffraction-optical relief structure, for example in a lacquer layer that may have been metallized and specially applied for this purpose on the security document material, the order of magnitude of the microstructures in the wave-optical range is at and below 1 μm.
Da sich die MikroStrukturen aufgrund ihrer geringen Dimensionierung mit den üblichen Verfahren zur Herstellung von Gravurplatten, zum Beispiel mittels Stichel, Laser oder durch Ätzen, nicht immer hinreichend exakt erzeugen lassen, sieht die Erfindung eine zweistufige Druckplattenherstellung vor. Dabei wird zunächst einerseits eine Originaldruckplatte mit der Druck- bildgravur und andererseits ein oder mehrere Prägestempel mit den Mi- krostrukturen in herkömmlicher Weise separat erzeugt und die Originaldruckplatte oder eine daran abgeformte Mater wird mit dem oder den Originalprägestempeln oder Prägestempelduplikaten anschließend kombiniert.Since the microstructures cannot always be produced with sufficient accuracy due to their small dimensions using the usual methods for producing engraving plates, for example by means of a stylus, laser or by etching, the invention provides for a two-stage printing plate production. First, an original printing plate with the print image engraving and, on the other hand, one or more embossing stamps with the microstructures are produced separately in a conventional manner, and the original printing plate or a material molded thereon is then combined with the original embossing stamp or duplicate stamps.
Gemäß einer ersten Ausführungsform werden mit der Originaldruckplatte zunächst Zwischenformen, die Mater, geprägt. Es werden so viele Mater geprägt, wie die fertige Stahltiefdruckplatte Nutzen besitzen soll. Auch von den Mikrostrukturprägestempeln werden eine den Nutzen der Stahltiefdruckplatte entsprechende Anzahl von Duplikaten erzeugt. Die Mater wer- den dann mit den Duplikaten der Mikrostrukturprägestempel kombiniert, beispielsweise durch nebeneinander Anordnen und geeignetes Verbinden. Dieser Komplex dient dann als eigentliche Zwischenform zum Nachformen einer oder mehrerer Duplikat-Druckplatten, die dann als Stahltief druckplat- ten in den Druckwerken eingesetzt werden.According to a first embodiment, intermediate forms, the mater, are first embossed with the original printing plate. As many materials are embossed as the finished intaglio printing plate should have benefits. A number of duplicates corresponding to the benefits of the steel intaglio printing plate are also produced from the microstructure embossing stamps. The mater which is then combined with the duplicates of the microstructure embossing stamps, for example by arranging them side by side and connecting them appropriately. This complex then serves as the actual intermediate form for re-forming one or more duplicate printing plates, which are then used as deep steel printing plates in the printing units.
Gemäß einer anderen Ausführungsform werden aus der Originaldruckplatte, in die das Druckbild eingraviert wird, ein oder mehrere Bereiche entfernt, in die der oder die Originalmikrostrukturprägesternpel so eingesetzt wer- den, dass die MikroStrukturen unterhalb der Plattenoberfläche liegen. Die Matern werden dann von dem daraus entstehenden Komplex gebildet. Eine Anzahl von in der gewünschten Nutzenanordnung zusammengesetzten Matern bildet dann die Zwischenform zur Herstellung der Stahltiefdruckplatten.According to another embodiment, one or more areas are removed from the original printing plate into which the printed image is engraved, into which the original microstructure embossing star is inserted in such a way that the microstructures lie below the plate surface. The maters are then formed by the resulting complex. A number of maters assembled in the desired arrangement of sheets then form the intermediate form for producing the steel intaglio printing plates.
Außerdem kann die Druckplatte mit den gegenüber dem ungravierten Druckplattenniveau abgesenkten Mikroprägestrukturen auch direkt graviert werden. Voraussetzung ist aber der Einsatz einer Präzisionsgraviervorrichtung, da Standardgeräte für die Gravur von Stichtiefdruckplatten keine aus- reichende Genauigkeit besitzen, um damit vorgegebene Strukturen reproduzierbar zu erzeugen, deren Abmessungen kleiner als 100 μm sind. Die Präzisionsgravur kann sowohl durch mechanische, d.h. spanabhebende Gravur als auch durch Lasergravur erfolgen.In addition, the printing plate can be engraved directly with the micro-embossed structures which are lower than the non-engraved printing plate level. However, a precondition is the use of a precision engraving device, since standard devices for the engraving of intaglio printing plates do not have sufficient accuracy to reproducibly produce predetermined structures whose dimensions are smaller than 100 μm. Precision engraving can be done by mechanical, i.e. cutting engraving as well as laser engraving.
Während die für das Druckbild vorgesehenen, f arbaufnehmenden Vertiefungen in üblicher Art und Weise in die Druckplattenoberfläche eingraviert werden können, können die für die prägenden MikroStrukturen vorgesehenen Bereiche zunächst um den Wert abgetragen werden, um den die Absenkung erfolgen soll. In diese unter dem Niveau der unbearbeiteten Druckplat- tenoberfläche liegenden Bereiche werden dann durch eine Präzisionsgravur die MikroStrukturen eingebracht. Grundsätzlich ist es auch möglich, zuerst die MikroStrukturen in der vorgegebenen Solltiefe zu erzeugen und, sofern noch erforderlich, anschließend eventuell stehen gebliebenes Druckplatten- material abzutragen, um in einem Bereich die gewünschte Absenkung zu erreichen.While the color-receiving recesses provided for the printed image can be engraved in the usual manner in the printing plate surface, the areas provided for the embossing microstructures can first be removed by the amount by which the reduction is to take place. In this below the level of the unprocessed printing plate The microstructures are then introduced into the surface areas by precision engraving. In principle, it is also possible to first create the microstructures in the specified target depth and, if necessary, then to remove any remaining printing plate material in order to achieve the desired reduction in one area.
Das mit den MikroStrukturen versehene Druckplattenoriginal kann unmittelbar als kombinierte Druck- und Prägeplatte verwendet werden. Das Ori- ginal kann aber auch mit den üblichen Reproduktions- und Abformtechniken vervielfältigt werden.The printing plate original with the microstructures can be used directly as a combined printing and embossing plate. However, the original can also be reproduced using the usual reproduction and impression techniques.
Die erfindungsgemäßen Stichtiefdruckplatten gewährleisten auf den damit hergestellten Wertpapieren auch nach hohen Auflagen noch prägnante Prä- gestrukturen mit hoher Konturenschärfe.The intaglio printing plates according to the invention guarantee, even after long runs, concise embossed structures with high sharpness of contours on the securities produced with them.
Aufgrund des beim Stichtief duckverfahren sehr hohen Anpressdrucks wird das Substratmaterial, beispielsweise Baumwollpapier, auch in den unbedruckten oder ungeprägten Bereichen verdichtet und bleibend komprimiert. Die Absenkung der Prägestrukturen in der Druckplatte bewirkt in dem entsprechenden Bereich des bearbeiteten Substrats einen nicht oder zumindest weniger stark komprimierten Bereich, aus dem sich die geprägten Mikro- strukturen erheben. Als Verschleißschutz können die geprägten Mikrostruk- turen mit stabilisierenden Schutzschichten versehen werden.Due to the very high contact pressure in the engraving process, the substrate material, for example cotton paper, is compressed and permanently compressed even in the unprinted or unembossed areas. The lowering of the embossed structures in the printing plate in the corresponding area of the processed substrate causes an area that is not or at least less compressed, from which the embossed microstructures rise. As protection against wear, the embossed microstructures can be provided with stabilizing protective layers.
Nachfolgend wird die Erfindung beispielhaft anhand der Figuren beschrieben. Darin zeigen:The invention is described below by way of example with reference to the figures. In it show:
Fig. 1 eine Banknote mit einem Stahltiefdruckbild und geprägten MikroStrukturen,Fig. 1 is a banknote with a steel gravure print and embossed Microstructures
Fig. 2 die Banknote aus Fig. 1 im Querschnitt, wobei die Mikrostruk- turen als Blindprägung vorliegen,2 shows the banknote from FIG. 1 in cross section, the microstructures being blind embossed,
Fig. 3a bis 3c die Banknote aus Fig. 1 im Querschnitt zu unterschiedlichen Herstellungszeitpunkten, wobei die MikroStrukturen als optisches Beugungsmuster vorliegen,3a to 3c the banknote from FIG. 1 in cross section at different times of manufacture, the microstructures being in the form of an optical diffraction pattern,
Fig. 4a bis 4d die einzelnen Schritte zur Herstellung einer erfindungsgemäßen Stahltiefdruckplatte gemäß einer ersten Ausführungsform,4a to 4d the individual steps for producing a steel intaglio printing plate according to the invention according to a first embodiment,
Fig. 5 eine Banknote, ähnlich der Banknote aus Fig. 1 mit mehreren zueinander beabstandeten Mikrostrukturbereichen, undFIG. 5 shows a bank note, similar to the bank note from FIG. 1 with a plurality of microstructure regions spaced apart from one another, and
Fig. 6a bis 6e die einzelnen Schritte zur Herstellung einer erfindungsgemäßen Stahltiefdruckplatte gemäß einer zweiten Ausführungsform.6a to 6e the individual steps for producing a steel intaglio printing plate according to the invention according to a second embodiment.
Fig. 1 zeigt beispielhaft als eines von vielen möglichen Arten von Sicherheitsdokumenten eine Banknote in Draufsicht mit einem im Stahltiefdruckverfahren erzeugten Druckbild 1 und einer ebenfalls im Stahltiefdruckverfahren erzeugten Mikrostrukturprägung 2. Die Mikrostrukturprägung 2 kann beispielsweise eine Blindprägung im Papiersubstrat oder eine beu- gungsoptische Reliefstruktur in einer auf dem Papiersubstrat aufgebrachten Kunststoffschicht sein.1 shows, by way of example, as one of many possible types of security documents, a banknote in plan view with a printed image 1 produced in the steel intaglio printing process and a microstructure embossing 2 also produced in the steel intaglio printing process plastic layer applied to the paper substrate.
Fig. 2 zeigt einen Querschnitt durch die Banknote aus Fig. 1, wobei die Mikrostrukturprägung 2 als Blindprägung in der Oberfläche des Banknoten- Substrats 3 vorliegt. Die im Stahltiefdruckverfahren aufgebrachte, das Druckbild 1 bildende Druckfarbe „steht" auf der Oberfläche des Substrats 3 und ist daher taktil erfassbar.FIG. 2 shows a cross section through the banknote from FIG. 1, the microstructure embossing 2 being blind embossing in the surface of the banknote Substrate 3 is present. The printing ink applied in the steel gravure printing process and forming the printed image 1 “stands” on the surface of the substrate 3 and can therefore be detected by tactile means.
Die erhabene MikroStruktur der Mikrostrukturprägung 2 ist beispielsweise ein Linienraster mit einer Rasterweite im Bereich von 5 bis 100 μm. Eine solche Struktur ist als feines Licht-/ Schattenmuster visuell wahrnehmbar und auch die Oberfläche ist von der umgebenden, ungeprägten Oberfläche gegebenenfalls taktil unterscheidbar.The raised microstructure of microstructure embossing 2 is, for example, a line grid with a grid width in the range from 5 to 100 μm. Such a structure is visually perceptible as a fine light / shadow pattern and the surface can also be tactilely distinguished from the surrounding, unembossed surface.
In den Fig. 3a bis 3c ist ein Ausführungsbeispiel gezeigt, bei dem die Mikrostrukturprägung 2 als beugungsoptische Reliefstruktur ausgeführt ist. In diesem Falle besitzen die Strukturen eine Größenordnung von ca. 1 μm oder weniger als 1 μm, das heißt im Wellenlängenbereich des sichtbaren Lichts. Fig. 3a zeigt das noch unbedruckte Banknotensubstrat 3, welches in einer Zone 4 geglättet ist, damit ein Prägelack 5 in diesem Bereich besonders gut auf dem Substrat 3 haftet. Der Prägelack 5 ist mit einer dünnen Metallschicht 6 bedampft. Im nächsten Verfahrensschritt wird auf das so vorbereitete Substrat 3 im Stahltiefdruckverfahren einerseits das Druckbild 1 und anderer- seits die beugungsoptische Mikrostrukturprägung 2 aufgebracht (Fig. 3b). Anschließend wird die Mikrostrukturprägung 2 mit einem kratzfesten Schutzlack 7 abgedeckt (Fig. 3c).An embodiment is shown in FIGS. 3a to 3c, in which the microstructure embossing 2 is designed as a diffraction-optical relief structure. In this case, the structures have an order of magnitude of approximately 1 μm or less than 1 μm, that is to say in the wavelength range of visible light. 3a shows the still unprinted banknote substrate 3, which is smoothed in a zone 4, so that an embossing lacquer 5 adheres particularly well to the substrate 3 in this area. The embossing lacquer 5 is vapor-coated with a thin metal layer 6. In the next process step, the printed image 1 is applied to the substrate 3 prepared in this way using the steel gravure printing process, and the diffraction-optical microstructure embossing 2 is also applied (FIG. 3b). The microstructure embossing 2 is then covered with a scratch-resistant protective lacquer 7 (FIG. 3c).
Das Druckbild 1 und die Mikrostrukturprägung 2 gemäß den Ausführungs- beispielen nach Fig. 2 und Fig. 3a bis 3c werden in einem einzigen Druckvorgang unter Verwendung einer einzigen Druckplatte hergestellt. Dafür geeignete Druckplatten 8 sind beispielhaft in den Fig. 4d und 6e im Querschnitt gezeigt. Fig.4d ist zu entnehmen, dass in der Druckplattenoberfläche 9 einerseits Stahltiefdruckstrukturen 10 zur Erzeugung des Druckbilds 1 und andererseits MikroStrukturen 11 zur Erzeugung der Mikrostrukturprägung 2 vorhanden sind. Die MikroStrukturen 11 sind in die Druckplattenoberfläche 9 geringfügig eingelassen, so dass die obersten Mikrostrukturbereiche, das heißt die Spitzen des Mikrostrukturreliefs, in einem geringen Abstand d un- terhalb der Druckplattenoberfläche 9 liegen. Der Abstand d misst zwischen 20 und 100 μm, vorzugsweise zwischen 40 und 60 μm. Für die Herstellung eines Sicherheitsdrucks wird die Druckfarbe zunächst partiell im Bereich der Stahltiefdruckstrukturen 10 auf die Druckplattenoberfläche 9 aufgetragen, und mittels eines nicht dargestellten Wischzylinders wird überschüssige Druckfarbe von der Druckplattenoberfläche 9 abgewischt. Durch die Tieferlegung der MikroStrukturen 11 wird erreicht, dass der Wischzylinder nicht mit den filigranen MikroStrukturen 11 in Kontakt kommt und diese nicht beschädigen kann. Im anschließenden Druckvorgang wird das Substrat des Sicherheitsdokuments in die Stahltiefdruckstrukturen 10 und in die Mi- krostrukturen 11 hineingepresst, wodurch einerseits die Farbe aus den Stahltiefdruckstrukturen 10 aufgenommen wird und auf der Substratoberfläche haften bleibt und wodurch andererseits das Substrat an seiner Oberfläche im Bereich der MikroStrukturen 11 geprägt, das heißt dauerhaft verformt, wird.The printed image 1 and the microstructured embossing 2 according to the exemplary embodiments according to FIGS. 2 and 3a to 3c are produced in a single printing operation using a single printing plate. Suitable pressure plates 8 are shown in cross-section by way of example in FIGS. 4d and 6e. FIG. 4d shows that steel intaglio structures 10 for producing the printed image 1 and on the other hand, microstructures 11 for producing microstructure embossing 2 are present. The microstructures 11 are slightly embedded in the printing plate surface 9, so that the uppermost microstructure regions, that is to say the tips of the microstructure relief, lie at a small distance d below the printing plate surface 9. The distance d measures between 20 and 100 μm, preferably between 40 and 60 μm. For the production of a security print, the printing ink is first partially applied to the printing plate surface 9 in the area of the steel gravure printing structures 10, and excess printing ink is wiped off the printing plate surface 9 by means of a wiping cylinder, not shown. The lowering of the microstructures 11 ensures that the wiping cylinder does not come into contact with the filigree microstructures 11 and cannot damage them. In the subsequent printing process, the substrate of the security document is pressed into the steel intaglio structures 10 and into the microstructures 11, whereby on the one hand the ink is absorbed from the steel intaglio structures 10 and adheres to the substrate surface and on the other hand the substrate on its surface in the area of the microstructures 11 shaped, that is permanently deformed, is.
Die beim Stahltiefdruckverfahren zur Erzeugung des Druckbilds eingesetzten Drücke und Temperaturen des Druckplattenzylinders sind für die Prägung von üblichen Sicherheitspapieren geeignet, so dass das gleichzeitige Prägen und Bedrucken von Sicherheitspapier mit einer einzigen Stahltiefdruckplatte problemlos möglich ist. Eine typische Heiztemperatur der Plat- tenzylinder liegt bei circa 80°C, sie kann jedoch auch zwischen 50 und 90°C betragen. Nachfolgend werden anhand der Fig. 4a bis 4d und 6a bis 6e zwei alternative Verfahren zur Herstellung der Druckplatte 8 mit tiefer liegenden Mikro- strukturen 11 beschrieben.The pressures and temperatures of the printing plate cylinder used in the gravure printing process to produce the printed image are suitable for embossing conventional security papers, so that the simultaneous embossing and printing of security paper with a single steel intaglio printing plate is possible without any problems. A typical heating temperature of the plate cylinders is around 80 ° C, but it can also be between 50 and 90 ° C. 4a to 4d and 6a to 6e, two alternative methods for producing the printing plate 8 with deeper microstructures 11 are described below.
In einem ersten Schritt (Fig.4a) werden einerseits Stahltiefdruckstrukturen 10 auf herkömmliche Weise in einer Originaldruckplatte O eingebracht, beispielsweise also mittels eines Stichels oder im Ätzverfahren. Separat dazu wird ein oder ggf. auch mehrere verschiedene Prägestempel D mit Mi- krostrukturen 11 ebenfalls auf herkömmliche Weise erzeugt, beispielsweise also mit denselben Verfahren, die üblicherweise zur Herstellung von beugungsoptischen Reliefstrukturen eingesetzt werden.In a first step (FIG. 4 a), steel intaglio structures 10 are introduced into an original printing plate O in a conventional manner, for example by means of a stylus or in the etching process. Separately, one or possibly several different embossing dies D with microstructures 11 are also produced in a conventional manner, for example using the same methods that are usually used to produce diffraction-optical relief structures.
In einem zweiten Schritt (Fig.4b) werden Duplikate von der Originaldruckplatte O und dem Prägestempel D hergestellt. Die Herstellung des Duplikats der Originaldruckplatte O, das ist die Mater M, kann beispielsweise durch Prägen der Originaldruckplatte in einen plastisch verformbaren Kunststoff erfolgen, der dann die Mater M bildet (Cobex-Prägung). Es sind aber auch andere Abformungstechniken bekannt und verwendbar. Es werden eine der Anzahl der Nutzen der herzustellenden Stahltiefdruckplatte entsprechende Anzahl von Matern Mι,M2..., Mn hergestellt. Auch von dem oder den Prägestempeln D mit den MikroStrukturen 11 werden entsprechend viele Prägestempelduplikate DDi, DD2, ... hergestellt. Der Abformungsprozess der Prägestempelduplikate DD erfolgt vorzugsweise galvanoplastisch, indem die Mikrostruktur 11 zunächst elektrisch leitfähig gemacht und dann metallisiert wird, beispielsweise mit Kupfer. Die Kupferschicht wird anschließend hin- tergossen, beispielsweise mit Zinn, um die Struktur zu stabilisieren, und mit Blei oder Kunststoff hinterfüttert, um das Prägestempelduplikat DD handhabungsfähig zu machen. In einem dritten Schritt (Fig. 4c) werden die Matern Mi, M2, ... und die Prägestempelduplikate DDi, DD2, ... nebeneinander angeordnet und durch geeignete Verbindungstechniken, beispielsweise Kleben, fest miteinander verbunden, um eine Zwischenform Z zu bilden. In der in Fig. 4c dargestellten Zwischenform Z bilden jeweils ein Mater- und Prägestempelduplikatpaar M , DDi bzw. M2, DD2 etc. einen Nutzen der mittels der Zwischenform Z herzustellenden Stahltiefdruckplatte 8. Man erkennt, dass die Mikrostruktu- ren, die hier als Negativ-Mikrostrukturen 11' vorliegen, geringfügig über der Abformebene 9' der Zwischenform Z liegen.In a second step (FIG. 4b), duplicates of the original printing plate O and the die D are produced. The duplicate of the original printing plate O, that is the Mater M, can be produced, for example, by embossing the original printing plate in a plastically deformable plastic, which then forms the Mater M (Cobex embossing). However, other impression techniques are known and can be used. A number of maters M 1, M 2..., M n corresponding to the number of uses of the steel intaglio printing plate are produced. A corresponding number of duplicate dies DDi, DD 2 ,... Are also produced from the die or dies D with the microstructures 11. The molding process of the duplicate embossing dies DD is preferably carried out galvanoplastic, in that the microstructure 11 is first made electrically conductive and then metallized, for example with copper. The copper layer is then poured over, for example with tin in order to stabilize the structure, and backed with lead or plastic in order to make the duplicate embossing stamp DD manageable. In a third step (FIG. 4c), the mats Mi, M2, ... and the duplicate dies DDi, DD 2 , ... are arranged next to each other and firmly connected to one another by suitable connecting techniques, for example gluing, in order to form an intermediate form Z. , In the intermediate form Z shown in FIG. 4c, a pair of material and embossing dies M, DDi or M 2 , DD 2 etc. form a use of the steel gravure printing plate 8 to be produced by means of the intermediate form Z. It can be seen that the microstructures that are shown here are present as negative microstructures 11 ', lying slightly above the impression plane 9' of the intermediate form Z.
Das Abformen der Stahltiefdruckplatte 8 von der Zwischenform Z (Fig. 4d) geschieht wiederum galvanoplastisch in entsprechender Weise wie die Duplizierung des Prägestempels D. Zusätzlich kann die Druckplattenoberfläche 9 durch Vernickeln, Verchromen in einem weiteren Herstellungsschritt ge- härtet werden.The steel intaglio printing plate 8 is molded from the intermediate form Z (FIG. 4d) again in a galvanoplastic manner in a manner similar to the duplication of the die D. In addition, the printing plate surface 9 can be hardened by nickel plating, chrome plating in a further manufacturing step.
Ein alternatives Verfahren zur Herstellung der Druckplatte 8 ist in den Fig. 6a bis 6e gezeigt. Demnach wird zunächst die Originaldruckplatte O mit den Stichtiefdruckstrukturen 10 erzeugt (Fig. 6a). Aus der Originaldruckplatte O werden anschließend bestimmte Flächenbereiche segmentweise extrahiert, beispielsweise durch hochpräzise Frästechnik (Fig. 6b). In die so erzeugte Aussparung 13 wird sodann der Prägestempel D mit den MikroStrukturen 11, wie er in Fig. 4a gezeigt ist, eingesetzt (Fig. 6c). Das erfordert eine passgenaue Bearbeitung des Prägestempels D, damit die MikroStrukturen nach dem Einsetzen des Prägestempels D in die Aussparung 13 um einen definierten Abstand d tiefer liegen als die Oberfläche der Originaldruckplatte O. Die so vorbereitete Originaldruckplatte O wird dann zu Prägen von Matern M genutzt (Fig. 6d), wobei die Prägung beispielsweise wieder im Cobexpräge- verfahren erfolgt. In diesem Falle dient jede Mater M zur weiteren Herstel- lung eines vollständigen Nutzen der zu erzeugenden Stahltiefdruckplatte 8. Es werden daher von der Originaldruckplatte O mit eingelagertem Prägestempel D (Fig. 6c) so viele Matern Mi, M2, M3, ... hergestellt, wie die endgültig herzustellende Stahltiefdruckplatte 8 Nutzen besitzt. Die Matern Mi, M2, M3, ... werden wiederum durch geeignete Verbindungstechniken zusammengesetzt zu einer Zwischenform Z (Fig. 6e), von der die Stahltiefdruckplatte 8 galvanotechmsch abgeformt wird.An alternative method for manufacturing the printing plate 8 is shown in FIGS. 6a to 6e. Accordingly, the original printing plate O with the intaglio printing structures 10 is first produced (FIG. 6a). Certain surface areas are then extracted segment by segment from the original printing plate O, for example using high-precision milling technology (FIG. 6b). The die D with the microstructures 11, as shown in FIG. 4a, is then inserted into the recess 13 thus produced (FIG. 6c). This requires a precise processing of the stamp D so that the microstructures after inserting the stamp D into the recess 13 are a defined distance d lower than the surface of the original printing plate O. The original printing plate O prepared in this way is then used to stamp Mat M ( 6d), the embossing again being carried out, for example, in the cobex embossing process. In this case, each Mater M is used for further production. a complete use of the steel intaglio printing plate 8 to be produced. Therefore, as many materials Mi, M 2 , M3, ... are produced from the original printing plate O with an embossed stamp D (FIG. 6c) as the steel intaglio printing plate 8 that is to be finally produced has use. The materials Mi, M2, M3, ... are in turn assembled by suitable connection techniques to form an intermediate form Z (FIG. 6e), from which the steel intaglio printing plate 8 is electroplated.
Alternativ kann das Einprägen der Originalplatte aus 6c in eine ausreichend große Zwischenform Z entsprechend der Anzahl der gewünschten Nutzen wiederholt werden. In diesem Fall entfällt der Schritt des Zusammenfügens der Einzelmatern Mi, M2, M3, ... zur Zwischenform Z.Alternatively, the stamping of the original plate from FIG. 6c into a sufficiently large intermediate shape Z can be repeated in accordance with the number of desired uses. In this case, the step of joining the individual maters Mi, M2, M3, ... to the intermediate form Z is omitted.
Die vorgenannten, alternativen Herstellungsverfahren sind somit in gleicher Weise dazu geeignet, aus den Originalstahltiefdruckstrukturen 10 und Originalmikrostrukturen 11 über „Negativstrukturen" 10', 11' der Zwischenform Z wiederum Positivstrukturen 10, 11 in der fertigen Stahltiefdruckplatte 8 herzustellen. Das in Bezug auf Fig. 6a bis 6e beschriebene Herstellungsverfahren ist insofern zu bevorzugen, als das Einsetzen von MikroStrukturen 11 an eine beliebige Stelle innerhalb eines Druckbilds 1 durch Einsetzen entsprechender Prägestempel D in Aussparungen 13 der Originaldruckplatte O (Fig. 6c) einfacher ist, als das exakte Zusammensetzen von Druckplattenduplikaten bzw. Matern M mit Prägestempelduplikaten DD (Fig. 4c). Insbesondere lässt sich eine Stahltiefdruckplatte 8 zur Erzeugung eines Druckbilds 1 mit darin integrierten Mikrostrukturprägungen 2, wie in Fig. 5 dargestellt, durch ein Herstellungsverfahren nach Fig. 6a bis 6e besonders gut herstellen. In dem Stahltiefdruckbild 1, welches in Fig. 5 lediglich durch seine äußere Umrandung angedeutet ist, bilden mehrere Mikrostrukturprägungen 2 ein Feld von Mikrostrukturprägungen, bei dem die einzelnen MikroStruktur- prägungen 2 zueinander beabstandet sind. Diese Abstände 12' sind eine Konsequenz daraus, dass die einzelnen Mikrostrukturbereiche 11 der Stahltiefdruckplatte 8 zum Schutz gegen Beschädigung durch einen Wischzylinder eine maximale Größe nicht überschreiten dürfen und daher durch Trennstege 12 voneinander getrennt sind (Fig.4d). Diese Trennstege 12 reichen bis an die Druckplattenoberfläche 9 und haben eine notwendige Breite, um den Druck des Wischzylinders aufnehmen zu können. The aforementioned, alternative manufacturing methods are thus equally suitable for producing positive structures 10, 11 in the finished steel intaglio printing plate 8 from the original steel intaglio printing structures 10 and original microstructures 11 via "negative structures" 10 ', 11' of the intermediate form Z. This in relation to FIG. The production process described in FIGS. 6a to 6e is preferred in that the insertion of microstructures 11 at any point within a printed image 1 is easier by inserting appropriate embossing stamps D into recesses 13 in the original printing plate O (FIG. 6c) than the exact assembly of duplicate printing plates or Matern M with duplicate embossing dies DD (FIG. 4c). In particular, a steel intaglio printing plate 8 for producing a printed image 1 with microstructure embossments 2 integrated therein, as shown in FIG. 5, can be produced particularly well by a production method according to FIGS the steel intaglio d 1, which is indicated in FIG. 5 only by its outer border, several microstructure embossments 2 form a field of microstructure embossments in which the individual microstructure embossments embossings 2 are spaced apart. These distances 12 'are a consequence of the fact that the individual microstructure areas 11 of the steel intaglio printing plate 8 must not exceed a maximum size for protection against damage by a wiping cylinder and are therefore separated from one another by separating webs 12 (FIG. 4d). These separating webs 12 extend to the pressure plate surface 9 and have the necessary width in order to be able to absorb the pressure of the wiping cylinder.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Stahltiefdruckplatte (8) umfassend eine Druckplattenoberfläche (9) mit mindestens einem ersten Bereich mit Stahltiefdruckstrukturen (10) und min- destens einem zweiten Bereich mit Prägestrukturen (11), wobei die Prägestrukturen (11) eine Größenordnung von weniger als 100 μm besitzen und wobei die der Druckplattenoberfläche (9) am nächsten liegenden Bestandteile der Prägestrukturen (11) 20 μm bis 100 μm unterhalb der Druckplattenoberfläche (9) liegen.1. Steel intaglio printing plate (8) comprising a printing plate surface (9) with at least one first area with steel intaglio printing structures (10) and at least one second area with embossed structures (11), the embossed structures (11) being of a size of less than 100 μm and the components of the embossing structures (11) closest to the printing plate surface (9) being 20 μm to 100 μm below the printing plate surface (9).
2. Zwischenform (Z) zur Herstellung von Stahltiefdruckplatten (8) nach Anspruch 1 umfassend mindestens ein erstes Segment (M) mit Negativ-Stahltiefdruckstrukturen (10') und rnindestens ein zweites, vom ersten Segment (M) verschiedenes zweites Segment (DD) mit Negativ-Prägestrukturen (ll1)/ wobei die Zwischenform (Z) eine Abformebene (9') aufweist und wobei die der Abformebene (9') am nächsten liegenden Bestandteile der Negativ- Prägestrukturen (ll1) 20 μm bis 100 μm über der Abformebene (9') liegen.2. Intermediate form (Z) for the production of steel intaglio printing plates (8) according to claim 1 comprising at least one first segment (M) with negative steel intaglio printing structures (10 ') and at least one second segment (DD) different from the first segment (M) Negative embossed structures (ll 1 ) / wherein the intermediate mold (Z) has an impression plane (9 ') and the components of the negative embossed structures (ll 1 ) closest to the impression plane (9') are 20 μm to 100 μm above the impression plane (9 ').
3. Zwischenform (Z) zur Herstellung von Stahltiefdruckplatten (8) nach An- Spruch 1 umfassend mindestens ein Segment (M) mit Negativ-Stahltiefdruckstrukturen (101) und Negativ-Prägestrukturen (ll1), wobei die Zwischenform (Z) eine Abformebene (91) aufweist und wobei die der Abformebene (91) am nächsten liegenden Bestandteile der Negativ-Prägestrukturen (11 ') 20 μmbis 100 μm über der Abformebene (91) liegen.3. intermediate form (Z) for the production of steel intaglio printing plates (8) according to claim 1 comprising at least one segment (M) with negative steel intaglio structures (10 1 ) and negative embossing structures (ll 1 ), the intermediate form (Z) being an impression plane (9: 1), and wherein the the molding plane (9 1) closest parts of the negative embossed structures (11 ') from 20 microns to 100 microns above the molding plane are located (9: 1).
4. Originaldruckplatte zur Herstellung einer Zwischenform nach Anspruch 3 mit Stahltiefdruckstrukturen (10) und mindestens einer Aussparung (13), in welche ein Prägestempel (D) mit Prägestrukturen (11) so eingesetzt ist, dass die der Oberfläche der Originaldruckplatte O am nächsten liegenden Bestandteile der Prägestrukturen (11) 20 μm bis 100 μm unter dieser Oberfläche liegen.4. Original printing plate for producing an intermediate form according to claim 3 with steel intaglio structures (10) and at least one recess (13), in which an embossing stamp (D) with embossing structures (11) is inserted so that the surface of the original printing plate O is closest Components of the embossed structures (11) are 20 μm to 100 μm below this surface.
5. Gegenstand nach einem der Ansprüche 2 bis 4, wobei die Prägestrukturen eine Größenordnung von < 100 μm besitzen.5. Object according to one of claims 2 to 4, wherein the embossed structures have an order of magnitude of <100 microns.
6. Gegenstand nach einem der Ansprüche 1 bis 5, wobei die Prägestrukturen (11) eine Größenordnung im Bereich von 5 bis 100 μm besitzen.6. Article according to one of claims 1 to 5, wherein the embossed structures (11) have an order of magnitude in the range of 5 to 100 microns.
7. Gegenstand nach einem der Ansprüche 1 bis 5, wobei die Prägestrukturen (11) so ausgebildet sind, dass damit eine beugungsoptische Reliefstruktur geprägt werden kann.7. Object according to one of claims 1 to 5, wherein the embossing structures (11) are designed such that a diffraction-optical relief structure can be embossed therewith.
8. Gegenstand nach Anspruch 7, wobei die Prägestrukturen (11) eine Grö- ßenordnung von weniger als 1 μm besitzen.8. The article of claim 7, wherein the embossed structures (11) have an order of magnitude of less than 1 μm.
9. Gegenstand nach einem der Ansprüche 1 bis 8, wobei die der Druckplattenoberfläche (9) bzw. Abformebene (91) am nächsten liegenden Bestandteile der Prägestrukturen (11) mindestens 40 μm von der Druckplattenoberfläche (9) bzw. Abformebene (91) entfernt liegen.9. Object according to one of claims 1 to 8, wherein the components of the embossing structures (11) closest to the printing plate surface (9) or impression plane (9 1 ) are at least 40 μm from the printing plate surface (9) or impression plane (9 1 ) lie away.
10. Gegenstand nach einem der Ansprüche 1 bis 9, wobei die der Druckplattenoberfläche (9) bzw. Abformebene (9') am nächsten liegenden Bestandteile der Prägestrukturen (11) maximal 60 μm von der Druckplattenoberfläche (9) bzw. Abformebene (91) entfernt liegen.10. Object according to one of claims 1 to 9, wherein the components of the embossing structures (11) closest to the printing plate surface (9) or impression plane (9 ') are at most 60 μm from the printing plate surface (9) or impression plane (9 1 ) lie away.
11. Gegenstand nach einem der Ansprüche i bis 10, wobei der Bereich der Prägestrukturen (11) eine Flächengröße von weniger als 400 mm2, vorzugsweise weniger als 100 mm2 besitzt. 11. Object according to one of claims i to 10, wherein the area of the embossed structures (11) has an area size of less than 400 mm 2 , preferably less than 100 mm 2 .
12. Gegenstand nach einem der Ansprüche 1 bis 11, wobei mehrere Bereiche mit Prägestrukturen (11) eine Prägestrukturflächenmatrix bilden.12. Object according to one of claims 1 to 11, wherein a plurality of regions with embossed structures (11) form an embossed structure surface matrix.
13. Gegenstand nach einem der Ansprüche 1 bis 12, wobei die Prägestruktu- ren (11) von den Stahltiefdruckstrukturen (10) oder von einem anderen Bereich mit Prägestrukturen (11) durch einen Trennsteg (12) getrennt sind, der bis zur Druckplattenoberfläche (9) bzw. Abformebene (91) reicht und eine Breite von mindestens 0,5 mm besitzt.13. Object according to one of claims 1 to 12, wherein the embossing structures (11) are separated from the steel intaglio printing structures (10) or from another area with embossing structures (11) by a separating web (12) which extends as far as the printing plate surface (9 ) or impression level (9 1 ) is sufficient and has a width of at least 0.5 mm.
14. Verfahren zur Herstellung eines Gegenstands nach einem der Ansprüche 1, 2 oder 5 bis 13, umfassend die folgenden Schritte:14. A method for producing an article according to one of claims 1, 2 or 5 to 13, comprising the following steps:
Erzeugen einer Stahltiefdruckstruktur (10) in einer Originaldruckplatte (O) und Herstellen mindestens einer Mater (M) von der Origi- naldruckplatte (O),Producing a steel intaglio printing structure (10) in an original printing plate (O) and producing at least one material (M) from the original printing plate (O),
Erzeugen eines Prägestempels (D) mit Prägestrukturen (11) und Herstellen mindestens eines Prägestempelduplikats (DD),Producing an embossing stamp (D) with embossing structures (11) and producing at least one duplicating stamp (DD),
- Herstellen einer Zwischenform (Z) mit einer Abformebene (91) durch nebeneinander Anordnen und Verbinden einer oder mehrerer Mater (M, Mi, M2, ...) und eines oder mehrerer Prägestempelduplikate (DD, DDi, DD2, ...), so dass die der Abformebene am nächsten liegenden Bestandteile der Prägestrukturen 20 μm bis 100 μm über der Abform- ebene (91) liegen.- Production of an intermediate form (Z) with an impression plane (9 1 ) by arranging and connecting one or more materials (M, Mi, M2, ...) and one or more duplicate dies (DD, DDi, DD 2 , ...) ), so that the components of the embossing structures closest to the impression level are 20 μm to 100 μm above the impression level (9 1 ).
15. Verfahren zur Herstellung eines Gegenstands nach einem der Ansprüche 1 oder 3 bis 13, umfassend die folgenden Schritte: Erzeugen von Stahltiefdruckstrukturen (10) in einer Originaldruckplatte (O),15. A method of making an article according to any one of claims 1 or 3 to 13, comprising the following steps: Producing steel intaglio structures (10) in an original printing plate (O),
Erzeugen mindestens einer Aussparung in der die Stahltiefdruck- Strukturen (10) aufweisenden Oberfläche der Originaldruckplatte (O),Creating at least one recess in the surface of the original printing plate (O) having the steel gravure printing structures (10),
Erzeugen eines Prägestempels (D) mit Prägestrukturen (11),Producing an embossing stamp (D) with embossing structures (11),
Einfügen des Prägestempels (D) in die Aussparung (13) derart, dass die der Oberfläche der Originaldruckplatte (O) am nächsten liegendenInsert the embossing stamp (D) into the recess (13) in such a way that it is closest to the surface of the original printing plate (O)
Bestandteile der Prägestrukturen (11) 20 μm bis 100 μm unterhalb dieser Oberfläche liegen.Components of the embossed structures (11) are 20 μm to 100 μm below this surface.
16. Verfahren nach Anspruch 15, wobei von der Originaldruckplatte (O) mit dem in die Aussparung (13) eingesetzten Prägestempel (D) mehrere Matern16. The method according to claim 15, wherein of the original printing plate (O) with the embossing stamp (D) inserted into the recess (13) a plurality of maters
(Mi, M2, ...) geprägt werden, die nebeneinander angeordnet und zu einer Zwischenform (Z) verbunden werden.(Mi, M2, ...), which are arranged side by side and connected to an intermediate form (Z).
17. Verfahren nach Anspruch 14 oder 16, wobei von der Zwischenform (Z) eine Stahltiefdruckplatte (8) abgeformt wird.17. The method according to claim 14 or 16, wherein a steel intaglio printing plate (8) is molded from the intermediate mold (Z).
18. Verfahren nach Anspruch 17, wobei das Abformen der Stahltiefdruckplatte (8) von der Zwischenform (Z) galvanotechnisch erfolgt.18. The method according to claim 17, wherein the molding of the steel intaglio printing plate (8) from the intermediate form (Z) is carried out by electroplating.
19. Verfahren zur Herstellung einer Stahltiefdruckplatte (8) nach einem der Ansprüche 1 oder 5 bis 13, umfassend die folgenden Schritte:19. A method for producing a steel intaglio printing plate (8) according to one of claims 1 or 5 to 13, comprising the following steps:
Erzeugen von Stahltiefdruckstrukturen (10), in einer Stahltiefdruckplatte (8), Erzeugen von Prägestrukturen (11) in der Stahltiefdruckplatte (8) durch Gravur derart, dass die der Oberfläche der Stahltiefdruckplatte (8) am nächsten liegenden Bestandteile der Prägestrukturen (11) 20 bis 100 μm unterhalb dieser Oberfläche liegen.Producing steel intaglio printing structures (10) in a steel intaglio printing plate (8), Generating embossed structures (11) in the steel intaglio printing plate (8) by engraving such that the components of the embossed structures (11) closest to the surface of the steel intaglio printing plate (8) are 20 to 100 μm below this surface.
20. Verfahren nach einem der Ansprüche 14 bis 19, wobei die Prägestrukturen (11) eine Größenordnung von < 100 μm besitzen.20. The method according to any one of claims 14 to 19, wherein the embossed structures (11) have an order of magnitude of <100 microns.
21. Verfahren zur Herstellung eines Sicherheitsdokuments im Stahltief- druckverfahren unter Verwendung einer Stahltiefdruckplatte nach einem der Ansprüche 1 und 5 bis 13, umfassend die Schritte:21. A method for producing a security document in the steel gravure printing process using a steel gravure printing plate according to one of claims 1 and 5 to 13, comprising the steps:
Füllen der Stahltiefdruckstrukturen (10) der Stahltiefdruckplatte (8) mit Druckfarbe, ohne die Prägestrukturen (11) mit Druckfarbe zu füllen,Filling the steel intaglio printing structures (10) of the steel intaglio printing plate (8) with printing ink without filling the embossing structures (11) with printing ink,
Bedrucken eines Sicherheitsdokuments mittels der partiell mit Druckfarbe gefüllten Stahltiefdruckplatte (8) und Prägen der Prägestrukturen in einem Druckvorgang unter Anwendung eines Drucks, der aus- reicht, einerseits die Druckfarbe aus den Stahltiefdruckstrukturen (10) auf das Sicherheitsdokument zu übertragen und andererseits das Sicherheitsdokument im Bereich der Prägestrukturen (11) zu prägen.Printing a security document using the steel gravure printing plate (8) partially filled with printing ink and embossing the embossing structures in one printing process using a print that is sufficient to transfer the printing ink from the steel intaglio structures (10) to the security document on the one hand and the security document in the area on the other to emboss the embossed structures (11).
22. Verfahren nach Anspruch 21, wobei die Prägung des Sicherheitsdoku- ments im Bereich der Prägestrukturen (11) eine Blindprägung ist.22. The method according to claim 21, wherein the embossing of the security document in the area of the embossing structures (11) is blind embossing.
23. Verfahren nach Anspruch 21, wobei das Sicherheitsdokument eine prägbare Beschichtung (5, 6) aufweist, und wobei die Prägung des Sicherheitsdokuments im Bereich dieser prägbaren Beschichtung derart erfolgt, dass beu- gungsoptische Reliefstrukturen in die prägbare Beschichtung eingeprägt werden.23. The method according to claim 21, wherein the security document has an embossable coating (5, 6), and wherein the security document is embossed in the area of this embossable coating in such a way that optical relief structures are embossed into the embossable coating.
24. Verfahren nach Anspruch 23, wobei die geprägte Beschichtung mit einer transparenten Schutzschicht (7) abgedeckt wird.24. The method according to claim 23, wherein the embossed coating is covered with a transparent protective layer (7).
25. Sicherheitsdokument mit einem Stahltiefdruckbild und einer Mikrostrukturprägung, hergestellt mit einer Stichtiefdruckplatte nach einem der Ansprüche 1 oder 5 bis 13. 25. Security document with a steel intaglio printing image and a microstructure embossing, produced with an intaglio printing plate according to one of claims 1 or 5 to 13.
EP03702402.3A 2002-01-11 2003-01-08 Steel gravure method for the production of a security document, steel gravure plate and intermediate product for the same and method for production thereof Expired - Lifetime EP1467871B2 (en)

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DE10201032 2002-01-11
DE10201032A DE10201032A1 (en) 2002-01-11 2002-01-11 Steel intaglio printing process for producing a security document, as well as steel intaglio printing plate and semi-finished products therefor, and process for their production
PCT/EP2003/000112 WO2003057494A1 (en) 2002-01-11 2003-01-08 Steel gravure method for the production of a security document, steel gravure plate and semi-product for the same and method for production thereof

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CN (1) CN100386214C (en)
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AU (1) AU2003205579A1 (en)
CA (1) CA2472020C (en)
DE (2) DE10201032A1 (en)
ES (1) ES2289257T3 (en)
MY (1) MY136554A (en)
PT (1) PT1467871E (en)
RU (1) RU2314209C2 (en)
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ATE367934T1 (en) 2007-08-15
US7690300B2 (en) 2010-04-06
US20050072326A1 (en) 2005-04-07
RU2314209C2 (en) 2008-01-10
DE10201032A1 (en) 2003-07-24
DE50307762D1 (en) 2007-09-06
ES2289257T3 (en) 2008-02-01
WO2003057494A1 (en) 2003-07-17
CN1592688A (en) 2005-03-09
RU2004124522A (en) 2006-01-20
US7213512B2 (en) 2007-05-08
CA2472020C (en) 2010-11-23
MY136554A (en) 2008-10-31
CN100386214C (en) 2008-05-07
PT1467871E (en) 2007-10-25
US20070283824A1 (en) 2007-12-13
EP1467871B2 (en) 2014-12-03
EP1467871B1 (en) 2007-07-25
AU2003205579A1 (en) 2003-07-24
CA2472020A1 (en) 2003-07-17

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