EP2886343B1 - Procédé de fabrication d'un document de valeur, document de valeur ainsi obtenu et procédé d'exécution du procédé - Google Patents

Procédé de fabrication d'un document de valeur, document de valeur ainsi obtenu et procédé d'exécution du procédé Download PDF

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Publication number
EP2886343B1
EP2886343B1 EP14004164.1A EP14004164A EP2886343B1 EP 2886343 B1 EP2886343 B1 EP 2886343B1 EP 14004164 A EP14004164 A EP 14004164A EP 2886343 B1 EP2886343 B1 EP 2886343B1
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EP
European Patent Office
Prior art keywords
ink layer
value document
pigments
printing plate
document substrate
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.)
Active
Application number
EP14004164.1A
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German (de)
English (en)
Other versions
EP2886343A1 (fr
Inventor
Peter Schiffmann
Klaus Habik
Max Voit
Jana Kisselova
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 Currency Technology GmbH
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Giesecke and Devrient Currency Technology GmbH
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Publication of EP2886343A1 publication Critical patent/EP2886343A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F11/00—Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination
    • B41F11/02—Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination for securities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0403—Drying webs
    • B41F23/0406—Drying webs by radiation
    • B41F23/0409—Ultraviolet dryers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • B41F23/045—Drying sheets, e.g. between two printing stations by radiation
    • B41F23/0453—Drying sheets, e.g. between two printing stations by radiation by ultraviolet dryers
    • 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
    • B41M1/02—Letterpress printing, e.g. book printing
    • B41M1/04—Flexographic printing
    • 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
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
    • 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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • 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
    • B42D25/425—Marking by deformation, e.g. embossing
    • 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
    • B42D25/48—Controlling the manufacturing process
    • B42D2033/20—

Definitions

  • the invention relates to a method for producing a value document, in particular a banknote, and a device for carrying out the method.
  • Value documents within the meaning of the invention include, among others, banknotes, stocks, bonds, certificates, vouchers, checks, air tickets, high-quality admission tickets, labels for product security, credit or debit cards, but also other documents that are subject to forgery such as passports, identity cards or other identity documents.
  • banknotes During their circulation, value documents, such as banknotes, are exposed to heavy burdens of various kinds, which limit their orbital period.
  • the circulation period of a banknote depends essentially on its demand. Certain denominations are preferably used in commerce and thus have a shorter circulation time due to the greater exposure to environmental influences.
  • One cause of the limitation of the circulation time is mechanical stress due to abrasion, folding or creasing.
  • the main cause of the limited circulation time of banknotes is their premature pollution. Since the paper used for banknotes is very porous, it has a large surface area and a high surface roughness. The surface roughness favors dirt deposits considerably compared to a smooth surface. Dirt can be liquid or solid, and liquid dirt in turn can be hydrophobic or hydrophilic.
  • banknotes Numerous attempts have been made to extend the life of banknotes. For example, it has been proposed to make banknotes entirely from a plastic substrate (see, for example, US Pat AU 488,652 ). In the publication EP 0 256170 B2 It has been proposed to provide printed banknotes with a dirt-repellent protective layer which contains cellulose ester or cellulose ether to a lesser extent and to a lesser extent micronized wax and which is applied to the banknotes over the entire area. The micronized wax is thereby dispersed by kneading or mixing with oil, a colorant or a mixture thereof.
  • the coatings should preferably provide a matte surface appearance, since dull coatings do not adversely affect the visual appearance of a value document, as opposed to very smooth coatings, provide a better grip to the document of value when dropped, stacked and gripped, thereby preventing slippage of the stacked sheets Avoid transport processes (influenced by static and sliding friction), and also facilitate the mechanical inspection of the safety elements.
  • a security element which is surrounded by a matt coating, is easier to detect because of the much lower reflections from optical sensors or is not disturbed by highlights.
  • Value documents with paper substrate are often printed by intaglio printing. Due to the high pressure with which the substrate is pressed against the printing plate in this process, the paper surface in the non-engraved, d. H. non-ink-bearing areas of the printing plate strongly compressed and smoothed. As a result, an undesirable gloss can be produced on the paper substrate, which is to be reduced again by a matt coating applied afterwards.
  • the WO 2012/079674 A1 describes a method of producing three-dimensional patterns in coatings containing flaky effect pigments, patterned coatings prepared therewith, and their use in decorative and security products.
  • the DE 101 24 630 A1 describes a security, in particular a banknote, and a method for its production.
  • the security has a security element and a protective lacquer layer formed from a matt lacquer, which is recessed in the area of the security element. If necessary, the recessed area is provided with a protective lacquer layer formed from a gloss varnish.
  • the object of the invention is to provide value documents which are optimized in terms of their gloss and, in particular, have an increased protection against counterfeiting.
  • the value documents should in particular have an increased circulation time.
  • the embossing of printed layers based on effect pigments is known in securities printing.
  • intaglio printing applied to a value document substrate, already through-hardened, OVI® pigments or similar pigments containing color layers can be blind embossed in a subsequent step.
  • the surface of the value document substrate adapts to the engraved surface of the printing form (in particular a intaglio printing plate) used for the blind embossing.
  • the disadvantage of such a method is, inter alia, that the pigments are almost fixed with respect to their spatial orientation within the printing layer, so that a reorientation of the pigments is only possible to a limited extent.
  • a relatively high pressure and deep engraving are required, which may possibly lead to damage to the value document substrate (in particular paper).
  • Another disadvantage is the Passerschwankache in intaglio.
  • the invention is based on the idea of using the second flexographic printing unit of a flexographic printing press not only as a printing unit but also as a stamping unit.
  • the color layer preferably has a layer thickness in a range of 4 to 12 ⁇ m, particularly preferably a layer thickness in a range of 6 to 10 ⁇ m.
  • first UV drying device By means of an optionally arranged between the first flexographic printing unit and the second flexographic printing unit UV drying device (hereinafter also referred to as “first UV drying device” or as “UV intermediate dryer”), the viscosity of the applied by the first flexographic printing on the value document substrate, Control UV-curable ink layer specifically via the UV output.
  • incomplete crosslinking a so-called hardening
  • the UV intermediate dryer is an LED dryer with a power of 1 to 8 watts / cm 2 .
  • Such a dryer module does not require a mechanical shutter, so there are also relatively small designs.
  • the hardening of the color layer can take place from the front side, or preferably from the rear side, through the substrate. Curing from the back side has the advantage of reducing the impact of the ink layer into the substrate.
  • the back side of the substrate may partially comprise a UV-absorbing layer, eg an opaque white layer. In this way, the power of the UV radiation can be modulated.
  • the second flexographic printing unit In the second flexographic printing unit, an exact or register-accurate embossing of the ink layer applied by means of the first flexographic printing unit takes place in order to produce a relief effect in this way.
  • the application of a Dirt-repellent coating performed on the value document substrate.
  • the dirt-repellent coating is applied to the substrate as "complete" to the color layer so that no overlap occurs between the UV-crosslinkable color layer and the dirt-repellent coating.
  • the soil-repellent coating preferably has a layer thickness in a range of 1.5 to 3 ⁇ m.
  • the production of the relief coating can be effected in a cost-effective manner in an "in-line process" together with the production of the dirt-repellent coating.
  • the flexographic printing plate used in the second flexo printing unit can additionally have a color or lacquer-repellent coating on its surface in the embossing area in order to reduce the contamination.
  • UV drying device which is also referred to below as “second UV drying device” or as “UV end drier”
  • the production method according to the invention makes it possible to provide strong embossings (which are also referred to below as “macroscopic structure” or “macroscopic embossing”) within the UV-curable ink layer, in order to produce a relief effect in this way.
  • the three-dimensional effect created by the pits present in the ink layer is visually enhanced by the use of effect pigments. This is due, among other things, to the fact that in the embossing step not only the color layer is displaced, but also the spatial orientation of the effect pigments is changed.
  • the flow (i.e., the spatial retraction) of the flowable ink layer is believed to be faster than reorientation of the effect pigment so that the embossing information remains discernible despite a partial leveling of the ink layer due to the not yet complete reorientation of the effect pigment.
  • the course of the color layer and the fixation of the spatial orientation of the effect pigments can be controlled by the optional UV intermediate dryer.
  • the macroscopic embossing introduced into the UV-crosslinkable ink layer is in particular an identification in the form of (line) patterns, characters, numerals or the like.
  • the embossed marking can have a meaning connection to existing motifs on a value document.
  • the UV-crosslinkable ink may also contain (machine-readable) feature substances, e.g. luminescent, magnetic and / or IR-absorbing feature substances. If the relief lacquer produced by means of the UV-crosslinkable ink contains additional machine-readable feature substances, then the feature intensity (for example the intensity of the luminescence emission) correlates with the height of the three-dimensional relief lacquer. In this way, the three-dimensional structure is also machine-readable.
  • machine-readable feature substances e.g. luminescent, magnetic and / or IR-absorbing feature substances.
  • the value document substrate can already be printed with a primer layer (or precoat) prior to the step of applying the UV-curable ink layer by means of the first flexographic printing unit, which effects a smoothing of the substrate and thus a repelling of the UV-crosslinkable ink layer reduced in the substrate.
  • the primer layer can be based, for example, on a visually invisible lacquer or on a visually recognizable color.
  • the primer layer can in particular inorganic colored pigments, organic dyes, carbon black or magnetic pigments. Primer layers containing colored pigments can be used to optimize the contrast of the three-dimensional color layer present above the primer.
  • the primer imprint can be made over the whole area or only in a partial area on the substrate.
  • the primer can be applied to the substrate in offset printing, flexographic printing, screen printing, inkjet printing or gravure printing, for example.
  • the primer layer may feature feature substances, for example luminescent, magnetic and / or IR-absorbing feature substances.
  • the primer may also contain effect pigments.
  • the printing of the UV-crosslinkable ink layer can in particular be adapted or made in register with the imprint of the primer layer. This procedure is e.g. makes sense if the primer form in an "in-line process" is carried out together with the printing of a Relieflack generating UV-crosslinkable ink layer.
  • the UV-crosslinkable ink layer used in the process according to the invention is based on an effect pigment / binder combination.
  • Interference pigments typically have a thin film structure that includes a reflective layer, a partially transparent layer, and one or more intervening dielectric spacer layers. These are based, for example, on mica, on SiO 2 or on Al 2 O 3 . Such interference layers are referred to as one or more layers according to the number of dielectric layers.
  • Printing inks with pigments of such thin-layer interference layers are sold, for example, under the name Iriodin® (monolayer) or Colorcrypt® (multilayer) by Merck KGaA.
  • Printing inks with multilayer interference-layer pigments are also sold under the name OVI® by SICPA.
  • a subgroup of the interference layer pigments are cholesteric or other liquid crystals which may also be used. These are, for example, as liquid-crystalline silicone polymers or as pigments in so-called STEP® shades ("Shimmery Twin Effect Protection"). Pigments based on liquid-crystalline polymers are known, for example, from US Pat WO 2008/000755 A1 known. Liquid crystal UV screen printing inks are available, inter alia, from Merck.
  • the UV-crosslinkable printing ink used according to the invention can moreover be applied to the in the WO 2011/064162 A2 Color effect effect pigment compositions described are based.
  • the pigments have a longest dimension of edge length from end-to-end in a range of 15 nm to 1000 nm and are based on a transition metal selected from the group consisting of Cu, Ag, Au, Zn , Cd, Ti, Cr, Mn, Fe, Co, Ni, Ru, Rh, Pd, Os, Ir and Pt.
  • the transition metal is preferably Ag.
  • the aspect ratio ie the ratio of the longest end-to-end dimension in terms of thickness
  • the ratio of the binder to metal pigment is below 10: 1, especially below 5: 1.
  • the color can be seen in transmission and the color when viewed in reflection (eg blue in transmission and silver, gold, bronze, copper or violet in addition, violet, magenta, pink, green or brown in transmission and various colors in reflection, which depend on the choice of pigment / binder ratio).
  • Colors with gold / blue color change between reflection and transmission are, for example, in Examples 1, 2 and 3 in Table 1 of FIG WO 2011/064162 A2 called.
  • Example 4 shows a color with gold / violet color change, Example 5 a color with green-gold / magenta color change, Example 7 a color with violet / green color change and Example 8 a color with silver / opaque color change.
  • the UV-crosslinkable printing ink used according to the invention can moreover be applied to the in the WO 2005/051675 A2 (See in particular the description on page 11, line 10, to page 12, penultimate paragraph) based metal pigment compositions.
  • the pigments are based on a metal, which is preferably selected from the group consisting of aluminum, stainless steel, nichrome, gold, silver, platinum and copper.
  • the metal is particularly preferably aluminum, wherein the average particle diameter is preferably in a range of 8 to 15 ⁇ m, more preferably in a range of 9 to 10 ⁇ m, measured with a Coulter LS130 laser diffraction granulometer.
  • Such ink allows the provision of a "silver" mirror layer.
  • the metal pigment compositions (eg, yellow) may be colored.
  • the varnish for forming the soil-repellent coating may in particular be a water-based varnish, a UV varnish (which in particular is free-radically or cationically curable) or a water-based varnish with UV-reactive components.
  • UV-curing coatings are characterized by a high physical and chemical resistance and are very abrasion. Radical crosslinking UV lacquers are preferably suitable. Free-radically crosslinking compositions are based, for example, on acrylic acid esters. It will be understood that suitable photoinitiators must be included in each case and that the compositions may contain the usual adjuvants known to those skilled in the art. It is preferred that the antisoiling coating additionally comprises silicone resins and / or waxes to improve antisoiling properties.
  • adjuvants may be included, for example, coalescing agents, leveling agents, wetting agents, defoaming agents, viscosity modifiers, dispersing aids, and diluents.
  • non-recognizable feature substances such as luminescent substances, may be included in the composition.
  • the value document substrate which is provided with UV-crosslinkable ink according to the method according to the invention can be in particular a security paper.
  • a security paper is understood to be a value document that can not yet be processed.
  • the term security paper also includes paper-like substrates, for example plastic or polymer substrates, or paper / plastic multilayer substrates, such as a plastic / paper / plastic substrate or a paper / plastic / paper substrate.
  • Under a plastic / paper / plastic substrate is a substrate with a paper center layer to understand, which is provided on both sides with a plastic layer or foil (see the WO 2004/028825 A2 ).
  • a paper / plastic / paper substrate is out of the WO 2006/066431 A1 known.
  • a security element is usually provided with a functional layer having a security feature, for example an optically variable coating. It is particularly useful if the security element is adhered by means of an adhesive, for example by means of a heat seal lacquer, on the valuables or the security paper. Such a security element is eg a patch.
  • the security element is usually provided together with further security elements on a carrier (or carrier substrate) serving, strip-shaped continuous foil and transmitted from there to the surface of a security paper or a valuable item.
  • a strip-shaped endless film is provided as a roll product, that is to say wound up as an endless belt on a roll, wherein the endless film is of course not endless and thus infinitely long, but in particular has a length in the range of kilometers.
  • Machines for applying security elements to the surface of a security paper or a valuable item are commercially available, eg OptiNota H® from König & Bauer AG. Such a device allows the exact fit or register accurate application of security elements in the form of film strips on paper sheets.
  • the method according to the invention is also suitable for providing security documents, in particular banknotes, which are provided with a see-through security feature, such as a see-through window.
  • Fig. 1 shows a schematic cross-sectional view of a provided with a primer imprint 2 value document substrate 1, which is formed in the present case of paper.
  • the primer imprint 2 contains a colored ink and was produced by offset printing.
  • the primer imprint 2 is structured and forms a recognizable to the viewer information.
  • Fig. 2 shows a schematic cross-sectional view of a provided with a primer imprint 2 value document substrate 1, which additionally comprises a UV-curable, containing iriodin pigments ink layer 3.
  • the color layer 3 has a layer thickness in a range of 7 microns.
  • the ink layer 3 was produced by means of the first flexographic printing unit of a flexographic printing machine.
  • the color layer may optionally be incompletely crosslinked (ie, cured or polymerized) in a subsequent step by means of a UV drying device, in order to increase the viscosity and improve the embossability of the color layer, or in other words to reduce the course.
  • the imprint of the ink layer 3 was not adapted to the structure of the primer imprint 2, ie the primer 2 is only partially provided with the ink layer 3.
  • Fig. 3 shows a schematic cross-sectional view of a provided with a primer imprint 2 value document substrate 1, wherein the UV-crosslinkable, Iriodin pigments containing ink layer has a macroscopic embossing and thus forms a relief paint or 3-D paint 31.
  • the embossing was carried out by means of the second flexographic printing unit of a flexographic printing machine.
  • the adhesion of ink to the flexographic printing plate serving as embossing tool can be even more reduced or avoided by a suitable adjustment of the degree of hardening of the ink layer 3 when passing through the optional UV drying device.
  • the application of a dirt-repellent coating 4 to the value document substrate 1 is carried out at the same time.
  • the dirt-repellent coating 4 is applied "completing" to the ink layer 3 (or 31) on the substrate so that no overlap occurs between the UV-crosslinkable ink layer 3 (or 31) and the dirt-repellent coating 4.
  • the dirt-repellent coating 4 has a layer thickness of 2 ⁇ m.
  • Fig. 4 shows a schematic cross-sectional view of a usable in the second flexographic printing plate flexographic printing plate 5 according to a first embodiment, which is not part of the invention, but facilitates the understanding of the invention.
  • the flexographic printing plate 5 contains the two areas 51 and 52, of which the area 51, the embossing information for generating the relief in the relief 31 of the FIG. 3 forms and the area 52 forms the inking area for producing the soil-repellent coating 4 of Figure 3.
  • the two areas 51 and 52 of the flexographic printing plate 5 have the same height.
  • Fig. 5 shows a schematic cross-sectional view of a usable in the second flexographic printing plate flexographic printing plate 6 according to a second embodiment.
  • the flexographic printing plate 6 includes the two portions 61 and 62, of which the recessed portion 61, the embossing information for creating the relief in the relief 31 of the FIG. 3 forms and the raised portion 62, the inking area to produce the dirt-repellent coating 4 of FIG. 3 forms.
  • the area 61 of the printing plate has a reduced height compared to the area 62. In other words, in the printing plate, the area forming the embossing information for creating the relief in the 3-D paint is lowered.
  • Fig. 6 shows a schematic cross-sectional view of the non-inventive printing plate of FIG. 4 after coloring with varnish to produce the soil-repellent coating (reference number 4 in the FIG. 3 ).
  • How to use the FIG. 6 was able to recognize both the area 51, and the area 52 of in FIG. 4 shown printing plate 5 evenly dyed with (anti-soiling) paint to form in this way the paint-colored areas 71 and 72 of the printing plate.
  • Fig. 7 shows a schematic cross-sectional view of the pressure plate of FIG. 5 after coloring with varnish to produce the soil-repellent coating (reference number 4 in the FIG. 3 ). How to use the FIG. 7 could not recognize the recessed area 61, but only the elevated area 62 of the FIG. 5 shown printing plate 6 with (Antischmutzbe Anlagenungs-) paint 82 dyed.
  • the value document shown can be used for the step of generating the in FIG. 3 shown, a Relieflack 31 and an anti-contamination coating 4 having value document substrate in FIG. 7 shown flexographic printing plate can be used.
  • a Relieflack 31 and an anti-contamination coating 4 having value document substrate in FIG. 7 shown flexographic printing plate can be used.
  • the FIG. 7 shown flexographic printing plate is used because in the area 61 of the printing plate, which forms the embossing information and is used for the embossing of the UV-crosslinkable ink layer 3, no possibly interfering anti-fouling coating is present.
  • Fig. 8 shows a schematic cross-sectional view of the value document substrate of FIG. 3 after the step of finally drying by means of a UV drying device. Based on FIG. 8 It can be seen that after embossing the UV-curable ink layer (reference number 31 in FIG. 3 ) a relatively strong course of 3-D paint occurred. In other words, the 3-D enamel 311 has "recovered” from the embossment at the bottom and retreated to create a "soft" relief relief. The intensity of such a course depends, among other things, on the viscosity of the UV-curable varnish and the time interval between the embossing step and the subsequent UV-curing step.
  • Fig. 9 shows a schematic cross-sectional view of the value document substrate of FIG. 3 after the step of finally drying by means of a UV drying device. Based on FIG. 9 It can be seen that after embossing the UV-curable ink layer (reference number 31 in FIG. 3 ) a relatively weak or low profile of the 3-D paint occurred. In other words, the 3-D varnish 312 has "recovered” only slightly from the embossment at the bottom and retracted slightly to create a "hard” image relief.
  • a UV varnish was applied to the value document substrate by means of an anilox roller (scoop volume: 20 cm 3 / m 2 ).
  • the paint application was 7 microns.
  • the UV varnish contained 7% by weight of iriodin pigments.
  • silicone oils may be added to the UV varnish to reduce strike-off of the varnish into the substrate and, moreover, to reduce fouling of the embossed flexographic printing plate.
  • the UV varnish had a viscosity of 40 sec. DIN CUP 4 cup.
  • preference may be given to working with a varnish temperature of 30 to 40 ° C.
  • the elevated temperature has a viscosity-reducing effect.
  • Suitable UV lacquers are known from the packaging sector and are available, for example, from Weilburger or Schmid-Rhyner.
  • the embossing printing plate used was a flexographic printing plate of the "3D Evolution" type from Reproflex.
  • the paint composition for the formation of the anti-soiling coating will be explained below with reference to an example recipe. It is a radically curing UV varnish.
  • the degree of gloss and the elasticity of the components may vary in their proportions and quality.
  • component Manufacturer Function / chemical name Wt .-% Laromer PE 55 F BASF polyester 24.5 Ebecryl 83 Cytec Amine mod.

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Claims (7)

  1. Procédé de fabrication d'une document de valeur, en particulier d'un billet de banque, comprenant
    a) la mise à disposition d'un substrat pour document de valeur (1) ;
    b) l'application d'une couche d'encre (3) apte à s'écouler, réticulable par UV, contenant des pigments à effets, sur le substrat pour document de valeur, au moyen d'un premier groupe d'impression flexographique ;
    c) la mise en contact du substrat pour document de valeur (1) avec une plaque d'impression flexographique (6) à l'intérieur d'un deuxième groupe d'impression flexographique, cependant que la plaque d'impression flexographique (6) comporte une zone de plaque d'impression appropriée au gaufrage de la couche d'encre (3) appliquée sur le substrat pour document de valeur (1), réticulable par UV, contenant des pigments à effets, et au moins une autre zone de plaque d'impression pourvue d'un vernis destiné à la formation d'un revêtement (4) résistant aux salissures, afin de, de cette façon, générer un substrat pour document de valeur (1) qui comporte une couche d'encre (3) pourvue d'une structure gaufrée (31, 311, 312) tridimensionnelle, réticulable par UV, contenant des pigments à effets, et comporte, à l'extérieur de la zone de la couche d'encre (3), un revêtement (4) résistant aux salissures ;
    e) la réticulation complète de la couche d'encre (3) appliquée sur le substrat pour document de valeur (1), pourvue d'une structure gaufrée (31, 311, 312) tridimensionnelle, réticulable par UV, contenant des pigments à effets, au moyen d'un équipement de séchage aux UV, cependant que la plaque d'impression flexographique (6) comporte deux zones de plaque d'impression, à savoir une première zone de plaque d'impression (62), surélevée, qui est teintée avec le vernis destiné à la formation d'un revêtement (4) résistant aux salissures, et une deuxième zone de plaque d'impression, renfoncée (61), qui n'est pas teintée avec du vernis destiné à la formation d'un revêtement (4) résistant aux salissures et qui est adaptée à l'insertion d'une structure gaufrée tridimensionnelle (31, 311, 312) dans la couche d'encre (3) appliquée sur le substrat pour document de valeur, réticulable par UV, contenant des pigments à effets.
  2. Procédé selon la revendication 1, lequel, entre les étapes b) et c), comporte l'étape supplémentaire de la réticulation incomplète de la couche d'encre (3) appliquée sur le substrat pour document de valeur (1), réticulable par UV, contenant des pigments à effets, au moyen d'un équipement de séchage aux UV, afin de, de cette façon, modifier la viscosité de la couche d'encre (3) et les propriétés d'écoulement de la couche d'encre (3) non encore complètement réticulée, après l'insertion de la structure gaufrée (31, 311, 312) tridimensionnelle.
  3. Procédé selon une des revendications 1 ou 2, lequel, entre les étapes a) et b), comporte l'étape supplémentaire de l'application d'une couche d'apprêt (2) qui, de préférence, réside en un vernis non visible visuellement ou sur une encre reconnaissable visuellement, et, particulièrement de préférence, contient des pigments colorés inorganiques, des colorants inorganiques, de la suie ou des pigments magnétiques.
  4. Procédé selon la revendication 3, cependant que la couche d'apprêt (2) est appliquée par impression offset, par flexographie, par sérigraphie, par impression à jet d'encre ou impression en creux, sur le substrat.
  5. Procédé selon une des revendications de 1 à 4, cependant que les pigments à effets de la couche d'encre (3), mise en oeuvre à l'étape b), apte à s'écouler, réticulable par UV, sont sélectionnés parmi le groupe qui consiste en des pigments nacrés, pigments à effets métalliques, pigments d'interférence, pigments multicouches à couches transparentes ou transparentes et opaques, pigments holographiques, pigments BiOCI et pigments cristaux liquides.
  6. Procédé selon une des revendications de 1 à 5, cependant que le vernis mis en oeuvre à l'étape c), destiné à la formation du revêtement (4) résistant aux salissures, est un vernis à base d'eau, un vernis UV durcissant en particulier par voie radicalaire ou par voie cationique, ou un vernis à base d'eau à composants réactifs aux UV.
  7. Dispositif destiné à l'exécution du procédé selon une des revendications de 1 à 6, comprenant, dans l'ordre,
    - un groupe d'impression optionnel, en particulier un groupe d'impression offset, flexographique, sérigraphique, à jet d'encre ou impression en creux, adapté à pourvoir un substrat pour document de valeur d'une couche d'apprêt ;
    - un premier groupe d'impression flexographique adapté à, sur le substrat pour document de valeur (1) éventuellement pourvu d'une couche d'apprêt (2), appliquer une couche d'encre (3) apte à s'écouler, réticulable par UV, contenant des pigments à effets ;
    - un équipement optionnel de séchage aux UV adapté à réticuler incomplètement la couche d'encre (3) appliquée sur le substrat pour document de valeur (1), réticulable par UV, contenant des pigments à effets, afin de, de cette façon, modifier la viscosité de la couche d'encre et les propriétés d'écoulement de la couche d'encre non encore complètement réticulée, après l'insertion de la structure gaufrée tridimensionnelle;
    - un deuxième groupe d'impression flexographique doté d'une plaque d'impression flexographique (6) qui est adaptée à la mise en contact avec le substrat pour document de valeur (1) et qui comporte une zone de plaque d'impression appropriée au gaufrage de la couche d'encre (3) appliquée sur le substrat pour document de valeur, réticulable par UV, contenant des pigments à effets, et au moins une autre zone de plaque d'impression pourvue d'un vernis destiné à la formation d'un revêtement (4) résistant aux salissures, afin de, de cette façon, générer un substrat pour document de valeur (1) qui comporte une couche d'encre (3) pourvue d'une structure gaufrée (31, 311, 312) tridimensionnelle, réticulable par UV, contenant des pigments à effets, et comporte, à l'extérieur de la zone de la couche d'encre (3), un revêtement (4) résistant aux salissures ;
    - un équipement de séchage aux UV adapté à la réticulation complète de la couche d'encre (3) appliquée sur le substrat pour document de valeur (1), pourvue d'une structure gaufrée (31, 311, 312) tridimensionnelle, réticulable par UV, contenant des pigments à effets ;
    cependant que la plaque d'impression flexographique (6) du deuxième groupe d'impression flexographique comporte deux zones de plaque d'impression, à savoir une première zone de plaque d'impression (62), surélevée, qui est teintée avec le vernis destiné à la formation d'un revêtement (4) résistant aux salissures, et une deuxième zone de plaque d'impression, renfoncée (61), qui n'est pas teintée avec du vernis destiné à la formation d'un revêtement (4) résistant aux salissures et qui est adaptée à l'insertion d'une structure gaufrée tridimensionnelle (31, 311, 312) dans la couche d'encre (3) appliquée sur le substrat pour document de valeur (1), réticulable par UV, contenant des pigments à effets.
EP14004164.1A 2013-12-17 2014-12-10 Procédé de fabrication d'un document de valeur, document de valeur ainsi obtenu et procédé d'exécution du procédé Active EP2886343B1 (fr)

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DE102013021180.8A DE102013021180A1 (de) 2013-12-17 2013-12-17 Verfahren zum Herstellen eines Wertdokuments, daraus erhältliches Wertdokument und Vorrichtung zur Durchführung des Verfahrens

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DE102017009092A1 (de) * 2017-09-28 2019-03-28 Giesecke+Devrient Currency Technology Gmbh Verfahren zur Herstellung eines optisch variablen Elements sowie entsprechendes Element
DE102018216927B4 (de) 2018-10-02 2020-08-13 Heidelberger Druckmaschinen Ag Verfahren zum Herstellen eines Druckprodukts
CA3116462A1 (fr) 2018-10-25 2020-04-30 Basf Se Compositions comprenant des nanoplaquettes d'argent
CN113811409A (zh) 2019-05-06 2021-12-17 巴斯夫欧洲公司 包含银纳米片的组合物
FR3105088B1 (fr) * 2019-12-20 2021-12-24 Oberthur Fiduciaire Sas Structure optique à effet de relief
WO2021213942A1 (fr) 2020-04-23 2021-10-28 Basf Se Compositions comprenant des particules de métal de transition en forme de plaquettes
WO2022167377A1 (fr) 2021-02-03 2022-08-11 Basf Se Compositions comprenant des nanoplaquettes d'argent
AU2022273179A1 (en) 2021-05-12 2023-11-30 Basf Se Compositions, comprising platelet-shaped transition metal particles
WO2023072740A1 (fr) 2021-10-26 2023-05-04 Basf Se Procédé pour la production d'éléments d'interférence
DE102022129534A1 (de) * 2022-11-08 2024-05-08 Bundesdruckerei Gmbh Verfahren zum Bedrucken eines Dokuments

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