EP4098769A2 - Plaque d'impression en taille douce à durée de conservation étendue et son procédé de fabrication - Google Patents

Plaque d'impression en taille douce à durée de conservation étendue et son procédé de fabrication Download PDF

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Publication number
EP4098769A2
EP4098769A2 EP22020244.4A EP22020244A EP4098769A2 EP 4098769 A2 EP4098769 A2 EP 4098769A2 EP 22020244 A EP22020244 A EP 22020244A EP 4098769 A2 EP4098769 A2 EP 4098769A2
Authority
EP
European Patent Office
Prior art keywords
intaglio printing
printing plate
adhesion
copper
abrasion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22020244.4A
Other languages
German (de)
English (en)
Other versions
EP4098769A3 (fr
Inventor
Christoph Mengel
Reinhard Plaschka
Christian Schulze
Hubert Petratschek
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
Original Assignee
Giesecke and Devrient Currency Technology GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Publication of EP4098769A2 publication Critical patent/EP4098769A2/fr
Publication of EP4098769A3 publication Critical patent/EP4098769A3/fr
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
    • C23C22/08Orthophosphates
    • C23C22/12Orthophosphates containing zinc cations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41NPRINTING 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
    • B41N1/00Printing plates or foils; Materials therefor
    • B41N1/04Printing plates or foils; Materials therefor metallic
    • B41N1/06Printing plates or foils; Materials therefor metallic for relief printing or intaglio printing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41NPRINTING 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
    • B41N3/00Preparing for use and conserving printing surfaces
    • B41N3/003Preparing for use and conserving printing surfaces of intaglio formes, e.g. application of a wear-resistant coating, such as chrome, on the already-engraved plate or cylinder; Preparing for reuse, e.g. removing of the Ballard shell; Correction of the engraving
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/021Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/10Electroplating with more than one layer of the same or of different metals
    • C25D5/12Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
    • C25D5/14Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium two or more layers being of nickel or chromium, e.g. duplex or triplex layers
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00Electroplating characterised by the article coated
    • C25D7/06Wires; Strips; Foils
    • C25D7/0614Strips or foils
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00Electroplating characterised by the article coated
    • C25D7/04Tubes; Rings; Hollow bodies

Definitions

  • the invention relates to an intaglio printing plate which consists of brass, steel, copper or an alloy with brass and/or steel and/or copper and has an abrasion-reducing layer arranged on its surface facing a substrate to be printed.
  • the invention further relates to a method for producing such an intaglio printing plate.
  • the intaglio printing process is usually used. It is characterized by the fact that linear or punctiform indentations are introduced into an intaglio printing plate, which are partially or completely filled with ink.
  • a substrate such as paper
  • a substrate is pressed into the depressions of the intaglio printing plate with high pressure, so that the ink is transferred to the substrate and the substrate is deformed.
  • the intaglio printing plates used Due to the high line pressure, the permanent wiping process and the abrasive components in the substrate and ink in the intaglio printing process, the intaglio printing plates used must be provided with an abrasion-reducing layer that enables a sufficient service life of around 1,000,000 cycles.
  • a chromium layer as an abrasion-reducing layer to the surface of an intaglio printing plate, which can be deposited either galvanically or in the gas phase (physical vapor deposition—PVD).
  • PVD physical vapor deposition
  • EP 0906193 A1 and EP 2039529 A2 It is known to introduce the depressions to be printed or embossed directly into the surface of an intaglio printing plate by means of a processing module.
  • the processing module is a mechanical milling module for mechanical engraving or a laser module for laser engraving or a scoring module for scoring or turning.
  • This intaglio printing plate is produced without galvanic molding from a master.
  • nickel is not suitable as a material for these intaglio printing plates, so they consist of brass, steel, copper or an alloy with brass and/or steel and/or copper. In the case of brass, steel, copper or an alloy with brass and/or steel and/or copper, there is a sufficiently high removal rate while at the same time being harmless to health.
  • the adhesion of a layer of chromium on a workpiece made of brass is not sufficient and that the chromium layer detaches from the brass at an early stage.
  • the layer thickness of the chrome layer plays a subordinate role here.
  • the layer applied in the galvanic process with a layer thickness of approx. 4 ⁇ m to 6 ⁇ m is thicker than the layer vapor-deposited by means of PVD with a layer thickness of approx. 1 ⁇ m to 2 ⁇ m, but both detach.
  • the object of the invention is to improve the service life of intaglio printing plates which are provided with a wear-reducing layer and are made of brass, steel, copper or an alloy with brass and/or steel and/or copper.
  • an adhesion-promoting layer is arranged between the surface of the intaglio printing plate made of brass, steel, copper or an alloy with brass and/or steel and/or copper and the abrasion-reducing layer.
  • an intaglio printing plate which consists of brass, steel, copper or an alloy with brass and/or steel and/or copper, then onto the surface of the intaglio printing plate facing a substrate to be printed an adhesion-promoting layer is applied and then an abrasion-reducing layer is applied to the adhesion-promoting layer.
  • this adhesion-promoting layer should be kept as small as possible; the thickness is preferably 0.05 ⁇ m to 5 ⁇ m. An even, homogeneous wetting of the surface of the intaglio printing plate with the adhesion-promoting layer must be ensured.
  • the adhesion promoter layer can be applied to the intaglio printing plate either chemically, electrolytically or with a PVD process, or with a dipping or spraying process. After this, the abrasion-reducing layer is then applied to the adhesion promoter layer, preferably galvanically or using a PVD process.
  • the intaglio printing plate, the abrasion-reducing layer and the adhesion-promoting layer have different metals.
  • the intaglio printing plate has an electrochemically nobler metal than the metal of the abrasion-reducing layer.
  • the adhesion promoting layer has a metal whose electrochemical potential lies between the electrochemical potential of the metal of the intaglio printing plate and the electrochemical potential of the metal of the abrasion-reducing layer. The large electrochemical potential difference between the metal of the intaglio printing plate and the metal of the abrasion-reducing layer results in reduced adhesion between the intaglio printing plate and the abrasion-reducing layer.
  • the electrochemical potential of the metal of the adhesion promoting layer lies between the electrochemical potential of the metal of the intaglio printing plate and the electrochemical potential of the metal the abrasion-reducing layer. According to current opinion, this gradation of the difference in the electrochemical potential ultimately leads to an improvement in the adhesion of the abrasion-reducing layer to the intaglio printing plate.
  • the wear-reducing layer consists of chromium.
  • the adhesion promoting layer particularly preferably consists of nickel, copper or an alloy with nickel and/or copper.
  • nickel is preferably used in the case of an intaglio printing plate made of brass.
  • multi-layer systems such as, for example, copper and nickel are preferably used in order to generate a graded electrochemical potential difference between the intaglio printing plate and the wear-reducing layer.
  • the adhesion-promoting layer consists of a zinc phosphate treatment which brings about a chemical activation of the intaglio printing plate or the intaglio printing cylinder.
  • the surface of an intaglio printing plate has indentations to be printed or embossed, with the indentations to be printed or embossed being introduced directly into the surface of an intaglio printing plate by means of a processing module before the adhesion-promoting layer and the abrasion-reducing layer are applied to the intaglio printing plate.
  • the processing module is in particular a mechanical milling module for mechanical engraving or a laser module for laser engraving or a scoring module for scoring or turning.
  • the intaglio printing plate is particularly preferred already before the introduction of the indentations to be printed or embossed, it is bent or designed in the form of a roller, so that it can be clamped directly onto an intaglio printing cylinder or already forms one.
  • the intaglio printing plate according to the invention consists of brass, steel, copper or an alloy with brass and/or steel and/or copper.
  • the intaglio printing plate preferably consists essentially or for the most part of the materials mentioned, wherein further materials such as carbon can be added to a small extent to the materials mentioned in order to influence or improve the mechanical properties of the intaglio printing plate.
  • a particular advantage of the invention is that the improved adhesion of the abrasion-reducing layer on the intaglio printing plate leads to an increase in the service life of intaglio printing plates provided with an abrasion-reducing layer made of brass, steel or copper or an alloy with brass and/or steel and/or copper.
  • Documents of value that can be printed with an intaglio printing plate according to the invention are, in particular, banknotes, stocks, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other papers at risk of forgery, such as passports and other identification documents, and cards, such as credit or debit cards, whose card body has at least one layer of security paper, and also product security elements such as labels, seals, packaging, folding boxes, package inserts and the like.
  • the simplified term document of value includes all of the above materials, documents and product security means.
  • the substrate to be printed in such documents of value particularly preferably consists of paper made from cotton fibers, as is the case, for example used for banknotes, or of other natural fibers, or of synthetic fibers, or of a mixture of natural and synthetic fibers, or of at least one plastic film.
  • the substrate preferably consists of a combination of at least two different substrates arranged one above the other and connected to one another, a so-called hybrid.
  • the substrate consists, for example, of a combination of plastic film-paper-plastic film, ie a substrate made of paper is covered on each of its two sides by a plastic film, or of a combination of paper-plastic film-paper, ie a substrate made of a plastic film is covered on each of its covered with paper on both sides.
  • the advantages of the invention are explained on the basis of the following exemplary embodiment and the supplementary figures.
  • the exemplary embodiment represents a preferred embodiment to which, however, the invention is not intended to be limited in any way.
  • the illustrations in the figures are highly schematic for better understanding and do not reflect the real situation.
  • the proportions shown in the figures do not correspond to the conditions present in reality and are used solely to improve clarity.
  • the embodiment described in the following exemplary embodiment is reduced to the essential core information for the sake of better comprehensibility. In practical implementation much more complex embodiments can be used.
  • Figures 1 and 2 show schematically an intaglio printing plate 1, which consists of brass, steel, copper or an alloy with brass and/or steel and/or copper and on whose surface, which faces a substrate to be printed, an abrasion-reducing layer 2, also chromium, is arranged. Between the surface of the intaglio printing plate 1 and the abrasion-reducing layer 2 there is an adhesion-promoting layer 3 made of nickel, copper or an alloy with nickel and/or copper or made of a zinc phosphate coating. The thickness of the adhesion-promoting layer is 0.05 ⁇ m to 5 ⁇ m.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Printing Plates And Materials Therefor (AREA)
EP22020244.4A 2021-06-02 2022-05-30 Plaque d'impression en taille douce à durée de conservation étendue et son procédé de fabrication Pending EP4098769A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021002867.8A DE102021002867A1 (de) 2021-06-02 2021-06-02 Stichtiefdruckplatte mit verlängerter Haltbarkeitsdauer und Verfahren zu deren Herstellung

Publications (2)

Publication Number Publication Date
EP4098769A2 true EP4098769A2 (fr) 2022-12-07
EP4098769A3 EP4098769A3 (fr) 2023-03-01

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ID=81854470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22020244.4A Pending EP4098769A3 (fr) 2021-06-02 2022-05-30 Plaque d'impression en taille douce à durée de conservation étendue et son procédé de fabrication

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Country Link
EP (1) EP4098769A3 (fr)
DE (1) DE102021002867A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0906193A1 (fr) 1996-06-17 1999-04-07 Giesecke & Devrient GmbH Procede de production de plaques a gaufrer
EP1578604A2 (fr) 2002-12-20 2005-09-28 Giesecke & Devrient GmbH Procede et dispositif pour fabriquer des plaques d'impression helio et plaque d'impression ainsi fabriquee
EP2039529A2 (fr) 2007-09-20 2009-03-25 Giesecke & Devrient GmbH Dispositif et procédé destinés à la production de plaques d'impression hélio multi-usage
EP2832555A1 (fr) 2013-07-29 2015-02-04 Protec Surface Technologies S.r.L. Dispositif de support pour plaques d'impression
EP2836370A2 (fr) 2012-04-12 2015-02-18 KBA-NotaSys SA Appareil de revêtement de plaque d'impression en creux

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4008254A1 (de) 1990-03-15 1991-09-19 Huettl & Vester Gmbh Verfahren zum herstellen von gravierten walzen oder platten
DE10126264A1 (de) * 2001-05-29 2002-12-05 Giesecke & Devrient Gmbh Tiefdruckzylinder, Verfahren zum Herstellen eines Tiefdruckzylinders und Verfahren zum Recyceln eines Tiefdruckzylinders
DE102010019913A1 (de) * 2009-05-08 2010-12-30 Grohe Ag Verbundkörper mit dekorativer Hochglanzoberfläche
EP2514594A1 (fr) 2011-04-18 2012-10-24 KBA-NotaSys SA Plaque d'impression en creux, son procédé de fabrication et utilisation correspondante
GB2504923A (en) * 2012-06-18 2014-02-19 Teer Coatings Ltd Printing plate having a metal nitride protective layer
PL3878659T3 (pl) 2020-03-09 2024-04-22 Emea Inor Eood Powlekana płyta wklęsłodrukowa

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0906193A1 (fr) 1996-06-17 1999-04-07 Giesecke & Devrient GmbH Procede de production de plaques a gaufrer
EP1578604A2 (fr) 2002-12-20 2005-09-28 Giesecke & Devrient GmbH Procede et dispositif pour fabriquer des plaques d'impression helio et plaque d'impression ainsi fabriquee
EP2039529A2 (fr) 2007-09-20 2009-03-25 Giesecke & Devrient GmbH Dispositif et procédé destinés à la production de plaques d'impression hélio multi-usage
EP2836370A2 (fr) 2012-04-12 2015-02-18 KBA-NotaSys SA Appareil de revêtement de plaque d'impression en creux
EP3103650A1 (fr) 2012-04-12 2016-12-14 KBA-NotaSys SA Appareil de revêtement de plaque d'impression en creux
EP2832555A1 (fr) 2013-07-29 2015-02-04 Protec Surface Technologies S.r.L. Dispositif de support pour plaques d'impression

Also Published As

Publication number Publication date
DE102021002867A1 (de) 2022-12-08
EP4098769A3 (fr) 2023-03-01

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