EP2626215B1 - Method for producing a data carrier and data carrier obtainable therefrom - Google Patents

Method for producing a data carrier and data carrier obtainable therefrom Download PDF

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Publication number
EP2626215B1
EP2626215B1 EP13000578.8A EP13000578A EP2626215B1 EP 2626215 B1 EP2626215 B1 EP 2626215B1 EP 13000578 A EP13000578 A EP 13000578A EP 2626215 B1 EP2626215 B1 EP 2626215B1
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EP
European Patent Office
Prior art keywords
color
layer
copper
data carrier
laser
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.)
Not-in-force
Application number
EP13000578.8A
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German (de)
French (fr)
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EP2626215A1 (en
Inventor
Daniela Dr. Otto
Harald Dr. Reiner
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
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Giesecke and Devrient GmbH
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Publication date
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Priority to PL13000578T priority Critical patent/PL2626215T3/en
Publication of EP2626215A1 publication Critical patent/EP2626215A1/en
Application granted granted Critical
Publication of EP2626215B1 publication Critical patent/EP2626215B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/324—Reliefs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/337—Guilloche patterns
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
    • 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
    • B42D25/382—Special inks absorbing or reflecting infrared light

Definitions

  • the invention relates to a data carrier, in particular a value document such as a banknote, with a recognizable in the infrared spectral marking in the form of patterns, letters, numbers or images.
  • the invention further relates to a method for producing the data carrier.
  • Identity cards such as credit cards or identity cards
  • the optical properties of the card material in the form of a desired marking are irreversibly changed by suitable guidance of a laser beam.
  • an identity card with applied information is described, which has on a surface of different colored and stacked layer areas, which are at least partially interrupted by visually recognizable personalization data.
  • the object of the invention is to provide a data carrier of the type mentioned above, which has a laser-generated individual identification of high counterfeit security.
  • the label should occupy little space on the disk and be easy to integrate into existing designs or print images.
  • a first aspect of the invention relates to a method according to claim 1.
  • the laser source used is preferably an infrared laser in the wavelength range from 0.8 ⁇ m to 3 ⁇ m, in particular a Nd: YAG laser or a Nd: YVO 4 laser.
  • the infrared laser is preferably operated at a pulse frequency in a range of 30 to 50 kHz, a power in a range of 10 to 300 watts and a process speed in a range of 1500 to 10,000 mm / sec.
  • the marking layer is preferably formed by a gravure printing layer.
  • the background layer and the marking layer each have a high area coverage, in particular independently of one another, have a coverage in a range of 40 to 70%.
  • the background layer is formed in the form of a grid, in particular in the form of a line grid, and the marking layer is formed in the form of fine structures, in particular in the form of guilloches.
  • the background layer has raster elements of a first color and raster elements of a second color and the first color and the second color each differ from the color of the marker layer.
  • the IR-absorbing component of the marking layer is preferably selected from the group of compounds consisting of copper (II) fluoride (CuF 2 ), copper hydroxide fluoride (CuFOH), copper hydroxide (Cu (OH) 2 ), copper phosphate (Cu 3 (PO 4 ) 2 * 2H 2 O), anhydrous copper phosphate (Cu 3 (PO 4 ) 2 ), the basic copper (II) phosphates Cu 2 PO 4 (OH) (libethenitol), Cu 3 (PO 4 ) (OH) 3 (cornetite) , Cu 5 (PO 4 ) 3 (OH) 4 (pseudomalachite), CuAl 6 (PO 4 ) 4 (OH) 8 * 5H 2 O (turquoise), copper (II) pyrophosphate (Cu 2 (P 2 O 7 * 3H 2 O), anhydrous copper (II) pyrophosphate (Cu 2 (P 2 O 7 )), copper (II) metaphosphate (Cu 3 (P 3 O
  • the data carrier is a security paper or a value document, such as a banknote.
  • a second aspect of the invention relates to a data carrier obtainable by the method according to the first aspect of the invention.
  • the IR-absorbing inks which are suitable for the production of the marking layer, are for example in the EP 1 790 701 A1 and commercially available from SICPA under the trade name SICPATALK®CBA.
  • the IR-absorbing component is preferably a compound having a transition element selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni and Cu.
  • the transition element may more preferably be an ion from the group of ions consisting of Ti 3+ , VO 2+ , Cr 5+ , Fe 2+ , Ni 2+ , Co 2+ and Cu 2+ .
  • the IR-absorbing component containing the IR-absorbing transition element ion or the IR-absorbing transition element ions can, in particular, be in the form of a glass, for example in the form of a glass containing phosphate and / or fluoride, in which a coordination of the transition element ions or of the transition element ions is present at the phosphate and / or fluoride anions in the glass.
  • the infrared-absorbing component containing the IR-absorbing transition element ion (s) may, for example, be a crystalline compound consisting of one or more cations and one or more anions.
  • the anion may in particular consist of the group consisting of phosphate (PO 4 3- ), hydrogen phosphate (HPO 4 2- ), pyrophosphate (P 2 O 7 4- ), metaphosphate (P 3 O 9 3- ), polyphosphate, silicate ( SiO 4 4- ), the condensed polysilicates, titanate (TiO 3 2- ), the condensed polytitanates, vanadate (VO 4 3- ), the condensed polyvanadates, molybdate (MoO 4 2- ), the condensed Polymolybchal, tungstate (WO 4 2- ), the condensed polytungstate, fluoride (F - ), oxide (O 2- ) and hydroxide (OH-).
  • the infrared-absorbing component is selected from the group of compounds consisting of copper (II) fluoride (CuF 2 ), copper hydroxide fluoride (CuFOH), copper hydroxide (Cu (OH) 2 ), copper phosphate (Cu 3 (PO 4 ) 2 * 2H 2 O), anhydrous copper phosphate (Cu 3 (PO 4 ) 2 ), the basic copper (II) phosphates Cu 2 PO 4 (OH) (libethenitol), Cu 3 (PO 4 ) (OH) 3 (cornetite), Cu 5 (PO 4 ) 3 (OH) 4 (pseudomalachite), CuAl 6 (PO 4 ) 4 (OH) 8 * 5H 2 O (turquoise), copper (II) pyrophosphate (Cu 2 (P 2 O 7 * 3H 2 O), anhydrous copper (II) pyrophosphate (Cu 2 (P 2 O 7 )), copper (II) metaphosphate (Cu 3 (P 3 O
  • the infrared-absorbing component may further be an IR-absorbing transition element atom or ion attached to a component of the polymeric binder the ink is bound to act.
  • the polymer binder of the printing ink may in particular contain specific binding sites for transition element ions , preferably for Cu 2+ and / or for Fe 2+ .
  • the binding sites may in particular be phosphate groups which are crosslinked into a polymer main chain or grafted onto a polymer main chain.
  • the infrared-absorbing component is an IR-absorbing complex of a transition element atom or ion and a binding site contained in the polymer, preferably an organic thiourea-copper (II) complex dissolved in the binder.
  • the IR-absorbing inks which are suitable for the production of the marking layer may additionally contain at least one colored pigment.
  • Laser exposure of the marking layer using an infrared laser results in the ablation or removal of the IR-absorbing component and, if appropriate, ablation of a portion of the binder and the colored pigments.
  • the area treated with laser irradiation can be seen in the infrared spectral range in the form of brightening.
  • the area of the marking layer treated with laser radiation may have a visually detectable, darker color compared to the untreated area of the marking layer (this color depression recognizable in the visible spectral range is referred to below as "blackening" of the marking layer).
  • the invention is based on the finding that the blackening of the marking layer within the area treated with laser radiation can be masked or camouflaged by suitable choice of the design of the marking layer and the background layer, and / or by suitable choice of the colors of the marking layer and the background layer.
  • a data carrier with a mark which can be recognized in the infrared spectral range and is hidden in the visible spectral range in the form of patterns, letters, numbers or images.
  • the background layer and the marking layer each have a high areal coverage, in particular independently of one another, have an areal coverage of more than 40%, preferably in a range of 40 to 70%.
  • the marking layer is formed in particular in the form of fine structures or raster elements, preferably in the form of guilloches, microtext, graphic elements or the like.
  • background layer is suitable e.g. a line, dot or cross screen, with a line screen being preferred.
  • the background layer comprises raster elements of a first color and raster elements of a second color (and the raster elements of the first color and those of the second color alternate and possibly overlap partially) and the first color and the second color each differ from the color of the marking layer.
  • the color of the marking layer which is, for example, a gravure printing layer, is matched in hue to the hue or shades of the background layer. Preferred color variants are described below on the basis of the twelve-part color wheel according to Johannes Itten:
  • a so-called base color is selected.
  • Two neighboring colors at the distance of the hue angle ⁇ 15 - 30 ° are selected (three adjacent colors in the color circle are, for example, the colors greenish yellow, yellow and reddish yellow).
  • the color saturation and the brightness are set the same for all three colors.
  • the darkest color is used to make the marking layer.
  • the other two colors are used to make the background layer.
  • a base color is selected in the color wheel.
  • Two adjacent colors (secondary colors) at the distance of the hue angle ⁇ 15 - 30 ° are selected.
  • the base color which is darker than the two adjacent colors, is used to make the marking layer.
  • the other two colors are used for the production of the background layer.
  • the color saturation and the brightness of the two neighboring colors (secondary colors) are set the same.
  • a base color is selected in the color wheel.
  • An adjacent color (secondary color) at the distance of the hue angle ⁇ 15 - 30 ° is selected.
  • the base color is set to differ in saturation and / or brightness from the adjacent color and is used to make the marking layer.
  • the brightness of the neighboring color is set to be higher than that of the base color.
  • the adjacent color is used for the production of the background layer.
  • the tags may include an individualization tag for a value document such as a serial serial number, a symbol code such as a bar or matrix code, or the like.
  • the background layer in conjunction with the marking layer, can form visually detectable information which is in a correspondence with the marking which can be recognized in the infrared spectral range.
  • Laser sources in the near infrared are used with particular advantage, since this wavelength range fits well with the absorption properties of the substrates and printing inks used for value documents. For example, it is easy to specify for this range printing inks which are transparent to the laser radiation but opaque and colored in the visible spectral range for the human observer.
  • infrared lasers in the wavelength range of 0.8 .mu.m to 3 .mu.m in particular Nd: YAG laser or Nd: YVO 4 laser used.
  • the substrate of the data carrier may e.g. be formed of paper, a film or a paper-foil laminate.
  • the data carrier represents, for example, a security element, a sheet-shaped value document or the card body of an identity card, credit card or the like.
  • Fig. 1 shows a schematic representation of a banknote 10, within an identification area 12 is provided with the "1234", which can be detected by machine in the infrared spectral range.
  • Fig. 2a shows the identification area 12 of the bill when visually viewed with the naked eye.
  • the marking area has a two-colored background layer 22 in the form of a line grid produced in background printing, eg wet or dry offset printing or indirect high-pressure (in particular with nyprint plates).
  • the line grid consists of blue and purple lines that alternate.
  • the background layer 22 is overprinted within the area described by an ellipse with a marking layer 24 produced in the intaglio printing in the form of a cross grid of intersecting horizontal and vertical lines.
  • the marking layer 24 was obtained from dark blue, IR absorbing stitch ink from SICPA under the trade name SICPATALK® CBA.
  • the marking layer 24 has a marking "1234" camouflaged by the screening and the two-color design of the background layer 22 and hidden in the visible spectral range.
  • the marking is introduced into the marking layer 24 by laser application by means of a Nd vanadate solid-state laser (laser model: Edgewave laser marker, "Innoslab IS8I-E”; wavelength: 1064 nm; power: 100 watts; pulse length: 10 nsec; 1500-4500 mm / sec, pulse rate: 30-50 kHz).
  • Fig. 2b schematically shows a cross section through the labeling range of FIG. 2a along the line A-A '.
  • the marking area applied to the paper substrate 30 of the banknote 10 includes two layers: the background layer 22 and the marking layer 24, which absorbs the laser radiation of the infrared laser used for identification.
  • the effect of the laser radiation to the IR-absorbing stitch ink of the marking layer 24 leads to the ablation of the IR absorber.
  • a part of the binder and the colored pigment of the Stich strig cons can be removed.
  • a blackening 26 of the laser-exposed area takes place at the same time.
  • the blackening 26, however, is camouflaged by the design of the marking layer and the background layer and by the choice of the colors of the marking layer and the background layer and can only be recognized by visual inspection with the aid of a microscope (in particular in the form of pixels).
  • Fig. 2c shows schematically the same labeling area FIG. 2a when illuminated with an IR lamp, taken with an IR camera.
  • the banknote can thus be provided with visually invisible, but easily readable individualizations.
  • the colors yellow and green for the background layer 22 and the dark ocher yellow for the marking layer 24 could also be used.
  • the marking layer 24, which in the example has the shape of a cross grid, may advantageously be formed in the form of guilloches or other graphic elements.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)

Description

Die Erfindung betrifft einen Datenträger, insbesondere ein Wertdokument wie etwa eine Banknote, mit einer im infraroten Spektralbereich erkennbaren Kennzeichnung in Form von Mustern, Buchstaben, Zahlen oder Bildern. Die Erfindung betrifft des Weiteren ein Verfahren zum Herstellen des Datenträgers.The invention relates to a data carrier, in particular a value document such as a banknote, with a recognizable in the infrared spectral marking in the form of patterns, letters, numbers or images. The invention further relates to a method for producing the data carrier.

Ausweiskarten, wie beispielsweise Kreditkarten oder Personalausweise, werden seit langem mittels Lasergravur personalisiert. Bei der Personalisierung durch Lasergravur werden durch geeignete Führung eines Laserstrahls die optischen Eigenschaften des Kartenmaterials in Gestalt einer gewünschten Kennzeichnung irreversibel verändert. Beispielsweise ist in der Druckschrift DE 30 48 733 A1 eine Ausweiskarte mit aufgebrachten Informationen beschrieben, die auf einer Oberfläche unterschiedliche farbige und übereinander angeordnete Schichtbereiche aufweist, die zumindest teilweise durch visuell erkennbare Personalisierungsdaten unterbrochen sind.Identity cards, such as credit cards or identity cards, have long been personalized by laser engraving. In personalization by laser engraving, the optical properties of the card material in the form of a desired marking are irreversibly changed by suitable guidance of a laser beam. For example, in the document DE 30 48 733 A1 an identity card with applied information is described, which has on a surface of different colored and stacked layer areas, which are at least partially interrupted by visually recognizable personalization data.

Neben Ausweiskarten sind auch andere fälschungsgefährdete Wertdokumente, wie Banknoten, Aktien, Anleihen, Urkunden, Gutscheine, Schecks, Eintrittskarten und dergleichen, vermehrt mit einem lasergenerierten, individualisierenden Kennzeichen, wie etwa einer Seriennummer, versehen. Dokument WO-A-2011/161661 offenbart ein Verfahren nach dem Oberbegriff des Anspruchs 1.In addition to identity cards, other security documents worthy of forgery, such as banknotes, stocks, bonds, certificates, vouchers, checks, entrance tickets and the like, are increasingly provided with a laser-generated, individualizing identifier, such as a serial number. document WO 2011/161661 discloses a method according to the preamble of claim 1.

Ausgehend davon liegt der Erfindung die Aufgabe zugrunde, einen Datenträger der eingangs genannten Art bereitzustellen, der eine lasergenerierte individuelle Kennzeichnung hoher Fälschungssicherheit aufweist. Insbesondere soll die Kennzeichnung wenig Platz auf dem Datenträger beanspruchen und leicht in bestehende Designs oder Druckbilder zu integrieren sein.Proceeding from this, the object of the invention is to provide a data carrier of the type mentioned above, which has a laser-generated individual identification of high counterfeit security. In particular, the label should occupy little space on the disk and be easy to integrate into existing designs or print images.

Diese Aufgabe wird durch den Datenträger und das Verfahren zum Herstellen desselben gemäß den unabhängigen Ansprüchen gelöst. Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved by the data carrier and the method for producing the same according to the independent claims. Further developments of the invention are the subject of the dependent claims.

Zusammenfassung der ErfindungSummary of the invention

Ein erster Aspekt der Erfindung betrifft ein Verfahren nach Anspruch 1.A first aspect of the invention relates to a method according to claim 1.

Als Laserquelle wird bevorzugt ein Infrarotlaser im Wellenlängenbereich von 0,8 µm bis 3 µm, insbesondere ein Nd:YAG-Laser oder ein Nd:YVO4-Laser verwendet.The laser source used is preferably an infrared laser in the wavelength range from 0.8 μm to 3 μm, in particular a Nd: YAG laser or a Nd: YVO 4 laser.

Des Weiteren wird der Infrarotlaser vorzugsweise mit einer Pulsfrequenz in einem Bereich von 30 bis 50 kHz, einer Leistung in einem Bereich von 10 bis 300 Watt und einer Verfahrensgeschwindigkeit in einem Bereich von 1500 bis 10000 mm/sec betrieben.Furthermore, the infrared laser is preferably operated at a pulse frequency in a range of 30 to 50 kHz, a power in a range of 10 to 300 watts and a process speed in a range of 1500 to 10,000 mm / sec.

Die Markierungsschicht wird bevorzugt durch eine Stichtiefdruckschicht gebildet.The marking layer is preferably formed by a gravure printing layer.

Es wird bevorzugt, dass die Untergrundschicht und die Markierungsschicht jeweils eine hohe Flächendeckung aufweisen, insbesondere unabhängig voneinander eine Flächendeckung in einem Bereich von 40 bis 70% aufweisen.It is preferred that the background layer and the marking layer each have a high area coverage, in particular independently of one another, have a coverage in a range of 40 to 70%.

Weiterhin wird bevorzugt, dass die Untergrundschicht in Form eines Rasters, insbesondere in Form eines Linienrasters, gebildet ist und die Markierungsschicht in Form von feinen Strukturen, insbesondere in Form von Guillochen, gebildet ist.Furthermore, it is preferred that the background layer is formed in the form of a grid, in particular in the form of a line grid, and the marking layer is formed in the form of fine structures, in particular in the form of guilloches.

Des Weiteren wird bevorzugt, dass die Untergrundschicht Rasterelemente einer ersten Farbe und Rasterelemente einer zweiten Farbe aufweist und sich die erste Farbe und die zweite Farbe jeweils von der Farbe der Markierungsschicht unterscheiden.Furthermore, it is preferred that the background layer has raster elements of a first color and raster elements of a second color and the first color and the second color each differ from the color of the marker layer.

Die IR-absorbierende Komponente der Markierungsschicht wird bevorzugt aus der Gruppe von Verbindungen bestehend aus Kupfer(II)-fluorid (CuF2), Kupferhydroxidfluorid (CuFOH), Kupferhydroxid (Cu(OH)2), Kupferphosphat (Cu3(PO4)2*2H2O), wasserfreiem Kupferphosphat (Cu3 (PO4)2), den basischen Kupfer (II)-phosphaten Cu2PO4(OH) (Libethenit), Cu3 (PO4) (OH)3 (Cornetit), Cu5(PO4)3(OH)4 (Pseudomalachit), CuAl6 (PO4)4(OH)8*5H2O (Türkis), Kupfer(II)-pyrophosphat (Cu2 (P2O7 *3H2O), wasserfreiem Kupfer (II)-pyrophosphat (Cu2(P2O7)), Kupfer(II)-metaphosphat (Cu3 (P3O9)2), Eisen (II)-fluorid (FeF2*4H2O), wasserfreiem Eisen(II)-fluorid (FeF2), Eisen(II)-phosphat (Fe3 (PO4)2 * 8H2O, Vivianit), Lithiumeisen(II)-phosphat (LiFePO4, Triphylit), Natriumeisen(II)-phosphat (NaFePO4, Maricit), Eisen(II)-silicaten (Fe2SiO4, Fayalit; FexMg2-xSiO4, Olivin), Eisen(II)-carbonat (FeCo3, Ankerit, Siderit); Nickel (II)-phosphat (Ni3 (PO4)2*8H2O), Titan(III)-metaphosphat (Ti(P3O9)), Ca2Fe(PO4)2*4H2O (Anapait) und MgFe (PO4) F (Wagnerit) gewählt.The IR-absorbing component of the marking layer is preferably selected from the group of compounds consisting of copper (II) fluoride (CuF 2 ), copper hydroxide fluoride (CuFOH), copper hydroxide (Cu (OH) 2 ), copper phosphate (Cu 3 (PO 4 ) 2 * 2H 2 O), anhydrous copper phosphate (Cu 3 (PO 4 ) 2 ), the basic copper (II) phosphates Cu 2 PO 4 (OH) (libethenitol), Cu 3 (PO 4 ) (OH) 3 (cornetite) , Cu 5 (PO 4 ) 3 (OH) 4 (pseudomalachite), CuAl 6 (PO 4 ) 4 (OH) 8 * 5H 2 O (turquoise), copper (II) pyrophosphate (Cu 2 (P 2 O 7 * 3H 2 O), anhydrous copper (II) pyrophosphate (Cu 2 (P 2 O 7 )), copper (II) metaphosphate (Cu 3 (P 3 O 9 ) 2 ), iron (II) fluoride (FeF 2 * 4H 2 O), anhydrous Iron (II) fluoride (FeF 2 ), iron (II) phosphate (Fe 3 (PO 4 ) 2 * 8H 2 O, Vivianit), lithium iron (II) phosphate (LiFePO 4 , triphylite), sodium iron (II) phosphate (NaFePO 4 , Maricit), iron (II) silicates (Fe 2 SiO 4 , fayalite, Fe x Mg 2-x SiO 4 , olivine), ferrous carbonate (FeCo 3 , anchorite, siderite); Nickel (II) phosphate (Ni 3 (PO 4 ) 2 * 8H 2 O), titanium (III) metaphosphate (Ti (P 3 O 9 )), Ca 2 Fe (PO 4 ) 2 * 4H 2 O (anapait ) and MgFe (PO 4 ) F (Wagnerite).

Weiterhin wird bevorzugt, dass der Datenträger ein Sicherheitspapier oder ein Wertdokument, wie etwa eine Banknote, ist.Furthermore, it is preferred that the data carrier is a security paper or a value document, such as a banknote.

Ein zweiter Aspekt der Erfindung betrifft einen Datenträger, der durch das Verfahren gemäß dem ersten Aspekt der Erfindung erhältlich ist.A second aspect of the invention relates to a data carrier obtainable by the method according to the first aspect of the invention.

Ausführliche Beschreibung der ErfindungDetailed description of the invention

IR-absorbierende Druckfarben, die zur Herstellung der Markierungsschicht geeignet sind, sind z.B. in der EP 1 790 701 A1 beschrieben und kommerziell bei der Firma SICPA unter dem Handelsnamen SICPATALK®CBA erhältlich. Die IR-absorbierende Kompenente ist demnach bevorzugt eine Verbindung mit einem Übergangselement, das aus der Gruppe bestehend aus Ti, V, Cr, Mn, Fe, Co, Ni und Cu gewählt ist. Bei dem Übergangselement kann es sich weiter bevorzugt um ein Ion aus der Gruppe von Ionen bestehend aus Ti3+, VO2+, Cr5+, Fe2+, Ni2+, Co2+ und Cu2+ handeln. Die das IR-absorbierende Übergangselemention bzw. die IR-absorbierenden Übergangselementionen enthaltende IR-absorbierende Komponente kann insbesondere in Form eines Glases, z.B. in Form eines phosphat- und/oder fluoridhaltigen Glases, in dem eine Koordination des Übergangselementions bzw. der Übergangselementionen an die Phosphat- und/oder Fluoridanionen in dem Glas vorhanden ist, vorliegen. Des Weiteren kann es sich bei der das IR-absorbierende Übergangselemention bzw. die IR-absorbierenden Übergangselementionen enthaltenden infrarotabsorbierenden Komponente z.B. um eine kristalline Verbindung, die aus einem oder mehreren Kationen und einem oder mehreren Anionen besteht, handeln. Das Anion kann dabei insbesondere aus der Gruppe bestehend aus Phosphat (PO4 3-), Hydrogenphosphat (HPO4 2-), Pyrophosphat (P2O7 4-), Metaphosphat (P3O9 3-), Polyphosphat, Silicat (SiO4 4-), den kondensierten Polysilicaten, Titanat (TiO3 2-), den kondensierten Polytitanaten, Vanadat (VO4 3-), den kondensierten Polyvanadaten, Molybdat (MoO4 2-), den kondensierten Polymolybdaten, Wolframat (WO4 2-), den kondensierten Polywolframaten, Fluorid (F-), Oxid (O2-) und Hydroxid (OH-) ausgewählt sein. Insbesondere wird bevorzugt, dass die infrarotabsorbierende Komponente aus der Gruppe von Verbindungen bestehend aus Kupfer(II)-fluorid (CuF2), Kupferhydroxidfluorid (CuFOH), Kupferhydroxid (Cu(OH)2), Kupferphosphat (Cu3(PO4)2*2H2O), wasserfreiem Kupferphosphat (Cu3 (PO4)2), den basischen Kupfer (II)-phosphaten Cu2PO4(OH) (Libethenit), Cu3 (PO4) (OH)3 (Cornetit), Cu5(PO4)3(OH)4 (Pseudomalachit), CuAl6 (PO4)4 (OH)8*5H2O (Türkis), Kupfer(II)-pyrophosphat (Cu2 (P2O7 *3H2O), wasserfreiem Kupfer (II)-pyrophosphat (Cu2(P2O7)), Kupfer(II)-metaphosphat (Cu3 (P3O9)2), Eisen (II)-fluorid (FeF2*4H2O), wasserfreiem Eisen(II)-fluorid (FeF2), Eisen(II)-phosphat (Fe3 (PO4)2 * 8H2O, Vivianit), Lithiumeisen(II)-phosphat (LiFePO4, Triphylit), Natriumeisen(II)-phosphat (NaFePO4, Maricit), Eisen(II)-silicaten (Fe2SiO4, Fayalit; FexMg2-xSiO4, Olivin), Eisen(II)-carbonat (FeCo3, Ankerit, Siderit); Nickel (II)-phosphat (Ni3 (PO4)2*8H2O), Titan(III)-metaphosphat (Ti(P3O9)), Ca2Fe(PO4)2*4H2O (Anapait) und MgFe (PO4) F (Wagnerit) gewählt ist. Bei der infrarotabsorbierenden Komponente kann es sich des Weiteren um ein IR-absorbierendes Übergangselementatom oder -ion, das an eine Komponente des Polymerbindemittels der Druckfarbe gebunden ist, handeln. Das Polymerbindemittel der Druckfarbe kann insbesondere spezifische Bindungsstellen für Übergangselementionen, vorzugsweise für Cu2+ und/oder für Fe2+, enthalten. Bei den Bindungsstellen kann es sich insbesondere um Phosphatgruppen, die in eine Polymerhauptkette einvernetzt oder auf eine Polymerhauptkette aufgepfropft sind, handeln. Vorzugsweise handelt es sich bei der infrarotabsorbierenden Komponente um einen IR-absorbierenden Komplex eines Übergangselementatoms oder -ions und einer in dem Polymer enthaltenen Bindungsstelle, vorzugsweise einen in dem Bindemittel gelösten organischen Thiohamstoff-Kupfer(II)-Komplex.IR-absorbing inks which are suitable for the production of the marking layer, are for example in the EP 1 790 701 A1 and commercially available from SICPA under the trade name SICPATALK®CBA. Accordingly, the IR-absorbing component is preferably a compound having a transition element selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni and Cu. The transition element may more preferably be an ion from the group of ions consisting of Ti 3+ , VO 2+ , Cr 5+ , Fe 2+ , Ni 2+ , Co 2+ and Cu 2+ . The IR-absorbing component containing the IR-absorbing transition element ion or the IR-absorbing transition element ions can, in particular, be in the form of a glass, for example in the form of a glass containing phosphate and / or fluoride, in which a coordination of the transition element ions or of the transition element ions is present at the phosphate and / or fluoride anions in the glass. Furthermore, the infrared-absorbing component containing the IR-absorbing transition element ion (s) may, for example, be a crystalline compound consisting of one or more cations and one or more anions. The anion may in particular consist of the group consisting of phosphate (PO 4 3- ), hydrogen phosphate (HPO 4 2- ), pyrophosphate (P 2 O 7 4- ), metaphosphate (P 3 O 9 3- ), polyphosphate, silicate ( SiO 4 4- ), the condensed polysilicates, titanate (TiO 3 2- ), the condensed polytitanates, vanadate (VO 4 3- ), the condensed polyvanadates, molybdate (MoO 4 2- ), the condensed Polymolybdaten, tungstate (WO 4 2- ), the condensed polytungstate, fluoride (F - ), oxide (O 2- ) and hydroxide (OH-). In particular, it is preferred that the infrared-absorbing component is selected from the group of compounds consisting of copper (II) fluoride (CuF 2 ), copper hydroxide fluoride (CuFOH), copper hydroxide (Cu (OH) 2 ), copper phosphate (Cu 3 (PO 4 ) 2 * 2H 2 O), anhydrous copper phosphate (Cu 3 (PO 4 ) 2 ), the basic copper (II) phosphates Cu 2 PO 4 (OH) (libethenitol), Cu 3 (PO 4 ) (OH) 3 (cornetite), Cu 5 (PO 4 ) 3 (OH) 4 (pseudomalachite), CuAl 6 (PO 4 ) 4 (OH) 8 * 5H 2 O (turquoise), copper (II) pyrophosphate (Cu 2 (P 2 O 7 * 3H 2 O), anhydrous copper (II) pyrophosphate (Cu 2 (P 2 O 7 )), copper (II) metaphosphate (Cu 3 (P 3 O 9 ) 2 ), iron (II) fluoride (FeF 2 * 4H 2 O), anhydrous iron (II) fluoride (FeF 2 ), iron (II) phosphate (Fe 3 (PO 4 ) 2 * 8H 2 O, vivianite), lithium iron (II) phosphate (LiFePO 4 , triphylite ), sodium iron (II) phosphate (NaFePO 4, Maricit), iron (II) silicates (Fe 2 SiO 4, fayalite; Fe x Mg 2-x SiO 4, olivine), iron (II) carbonate (FeCo 3 , Anchorite, siderite); nickel (II) phosphate (N i 3 (PO 4 ) 2 * 8H 2 O), titanium (III) metaphosphate (Ti (P 3 O 9 )), Ca 2 Fe (PO 4 ) 2 * 4H 2 O (anapait) and MgFe (PO 4 ) F (Wagnerite) is selected. The infrared-absorbing component may further be an IR-absorbing transition element atom or ion attached to a component of the polymeric binder the ink is bound to act. The polymer binder of the printing ink may in particular contain specific binding sites for transition element ions , preferably for Cu 2+ and / or for Fe 2+ . The binding sites may in particular be phosphate groups which are crosslinked into a polymer main chain or grafted onto a polymer main chain. Preferably, the infrared-absorbing component is an IR-absorbing complex of a transition element atom or ion and a binding site contained in the polymer, preferably an organic thiourea-copper (II) complex dissolved in the binder.

Die IR-absorbierenden Druckfarben, die zur Herstellung der Markierungsschicht geeignet sind, können darüber hinaus zumindest ein Buntpigment enthalten.The IR-absorbing inks which are suitable for the production of the marking layer may additionally contain at least one colored pigment.

Die Laserbeaufschlagung der Markierungsschicht mithilfe eines Infrarotlasers führt zur Ablation bzw. Entfernung der IR-absorbierenden Komponente und gegebenenfalls zur Ablation eines Teils des Bindemittels und der Buntpigmente. Der mit Laserbestrahlung behandelte Bereich ist im infraroten Spektralbereich in Form einer Aufhellung erkennbar. Der mit Laserstrahlung behandelte Bereich der Markierungsschicht kann verglichen mit dem unbehandelten Bereich der Markierungsschicht eine visuell erfassbare, dunklere Farbe aufweisen (diese im sichtbaren Spektralbereich erkennbare Farbvertiefung wird nachstehend als "Schwärzung" der Markierungsschicht bezeichnet). Der Erfindung liegt die Erkenntnis zugrunde, dass die Schwärzung der Markierungsschicht innerhalb des mit Laserstrahlung behandelten Bereichs durch geeignete Wahl des Designs der Markierungsschicht und der Untergrundschicht, und/oder durch geeignete Wahl der Farben der Markierungsschicht und der Untergrundschicht kaschiert bzw. getarnt werden kann. Auf diese Weise lässt sich in vorteilhafter Weise ein Datenträger mit einer im infraroten Spektralbereich erkennbaren und im sichtbaren Spektralbereich verborgenen Kennzeichnung in Form von Mustern, Buchstaben, Zahlen oder Bildern erzeugen.Laser exposure of the marking layer using an infrared laser results in the ablation or removal of the IR-absorbing component and, if appropriate, ablation of a portion of the binder and the colored pigments. The area treated with laser irradiation can be seen in the infrared spectral range in the form of brightening. The area of the marking layer treated with laser radiation may have a visually detectable, darker color compared to the untreated area of the marking layer (this color depression recognizable in the visible spectral range is referred to below as "blackening" of the marking layer). The invention is based on the finding that the blackening of the marking layer within the area treated with laser radiation can be masked or camouflaged by suitable choice of the design of the marking layer and the background layer, and / or by suitable choice of the colors of the marking layer and the background layer. On In this way, it is possible to advantageously produce a data carrier with a mark which can be recognized in the infrared spectral range and is hidden in the visible spectral range in the form of patterns, letters, numbers or images.

Mit Bezug auf das Design wird bevorzugt, dass die Untergrundschicht und die Markierungsschicht jeweils eine hohe Flächendeckung aufweisen, insbesondere unabhängig voneinander eine Flächendeckung von mehr als 40%, bevorzugt in einem Bereich von 40 bis 70%, aufweisen. Die Markierungsschicht wird insbesondere in Form von feinen Strukturen oder Rasterelementen, bevorzugt in Form von Guillochen, Mikrotext, graphischen Elementen oder dergleichen gebildet. Als Untergrundschicht eignet sich z.B. ein Linien-, Punkt- oder Kreuzraster, wobei ein Linienraster bevorzugt wird.With regard to the design, it is preferred that the background layer and the marking layer each have a high areal coverage, in particular independently of one another, have an areal coverage of more than 40%, preferably in a range of 40 to 70%. The marking layer is formed in particular in the form of fine structures or raster elements, preferably in the form of guilloches, microtext, graphic elements or the like. As background layer is suitable e.g. a line, dot or cross screen, with a line screen being preferred.

Mit Bezug auf die Wahl der Farben der Markierungsschicht und der Untergrundschicht wird bevorzugt, dass die Untergrundschicht Rasterelemente einer ersten Farbe und Rasterelemente einer zweiten Farbe aufweist (und sich die Rasterelemente der ersten Farbe und die der zweiten Farbe einander abwechseln und sich gegebenenfalls teilweise überlagern) und sich die erste Farbe und die zweite Farbe jeweils von der Farbe der Markierungsschicht unterscheiden. Insbesondere wird bevorzugt, dass die Farbe der Markierungsschicht, die beispielsweise eine Stichtiefdruckschicht ist, im Farbton mit dem Farbton bzw. den Farbtönen der Untergrundschicht abgestimmt ist. Bevorzugte Farbvarianten werden nachstehend in Anlehnung an den zwölfteiligen Farbkreis nach Johannes Itten beschrieben:With regard to the choice of the colors of the marking layer and the background layer, it is preferred that the background layer comprises raster elements of a first color and raster elements of a second color (and the raster elements of the first color and those of the second color alternate and possibly overlap partially) and the first color and the second color each differ from the color of the marking layer. In particular, it is preferred that the color of the marking layer, which is, for example, a gravure printing layer, is matched in hue to the hue or shades of the background layer. Preferred color variants are described below on the basis of the twelve-part color wheel according to Johannes Itten:

a) Farbvariante 1a) Color variant 1 Anleitung:Manual:

Im Farbkreis wird eine sogenannte Basisfarbe ausgewählt. Zwei benachbarte Farben (sogenannte Sekundärfarben) im Abstand des Bunttonwinkels ± 15 - 30° werden ausgewählt (drei angrenzende Farben im Farbkreis sind beispielsweise die Farben grünliches Gelb, Gelb und rötliches Gelb). Die Farbsättigung und die Helligkeit werden bei allen drei Farben gleich eingestellt. Die dunkelste Farbe wird zur Herstellung der Markierungsschicht verwendet. Die anderen beiden Farben werden zur Herstellung der Untergrundschicht herangezogen.In the color wheel, a so-called base color is selected. Two neighboring colors (so-called secondary colors) at the distance of the hue angle ± 15 - 30 ° are selected (three adjacent colors in the color circle are, for example, the colors greenish yellow, yellow and reddish yellow). The color saturation and the brightness are set the same for all three colors. The darkest color is used to make the marking layer. The other two colors are used to make the background layer.

Beispiele für geeignete Farbkombinationen lassen sich der folgenden Tabelle 1 entnehmen. Die darin beschriebenen Angaben beziehen sich auf den CIE-LCh-Farbraum (L = Helligkeit; C = Buntheit bzw. relative Farbsättigung; h = Bunttonwinkel). Tabelle 1 Farbe 1 Farbe 2 Farbe 3 H1 H1-15° - 30° H1 + 15°+30° L1 L2 variabel L2 variabel C1 C1 C1 Examples of suitable color combinations can be found in the following Table 1. The information described here relates to the CIE LCh color space (L = brightness, C = chroma or relative color saturation, h = hue angle). Table 1 Color 1 Color 2 Color 3 H 1 H 1 -15 ° - 30 ° H 1 + 15 ° + 30 ° L 1 L 2 variable L 2 variable C 1 C 1 C 1

b) Farbvariante 2b) Color variant 2 Anleitung:Manual:

Im Farbkreis wird eine Basisfarbe ausgewählt. Zwei benachbarte Farben (Sekundärfarben) im Abstand des Bunttonwinkels ± 15 - 30° werden ausgewählt. Die Basisfarbe, die dunkler als die zwei benachbarten Farben ist, wird zur Herstellung der Markierungsschicht verwendet. Die anderen beiden Farben werden zur Herstellung der Untergrundschicht herangezogen. Die Farbsättigung und die Helligkeit der beiden benachbarten Farben (Sekundärfarben) werden gleich eingestellt.A base color is selected in the color wheel. Two adjacent colors (secondary colors) at the distance of the hue angle ± 15 - 30 ° are selected. The base color, which is darker than the two adjacent colors, is used to make the marking layer. The other two colors are used for the production of the background layer. The color saturation and the brightness of the two neighboring colors (secondary colors) are set the same.

Beispiele für geeignete Farbkombinationen lassen sich der folgenden Tabelle 2 entnehmen: Tabelle 2 Farbe 1 Farbe 2 Farbe 3 H1 H1 -15° - 30° H1 + 15° + 30° L1 L2 > L1 und L2 = L3 L3 > L1 und L3 = L2 C1 C2 C3 Examples of suitable color combinations can be found in the following Table 2: Table 2 Color 1 Color 2 Color 3 H 1 H 1 -15 ° - 30 ° H 1 + 15 ° + 30 ° L 1 L 2 > L 1 and L 2 = L 3 L 3 > L 1 and L 3 = L 2 C 1 C 2 C 3

c) Farbvariante 3c) Color variant 3 Anleitung:Manual:

Im Farbkreis wird eine Basisfarbe ausgewählt. Eine benachbarte Farben (Sekundärfarbe) im Abstand des Bunttonwinkels ± 15 - 30° wird ausgewählt. Die Basisfarbe wird so eingestellt, dass sie sich in Sättigung und/oder Helligkeit von der benachbarten Farbe unterscheidet und wird zur Herstellung der Markierungsschicht verwendet. Die Helligkeit der benachbarten Farbe wird so eingestellt, dass sie höher als die der Basisfarbe ist. Die benachbarte Farbe wird zur Herstellung der Untergrundschicht herangezogen.A base color is selected in the color wheel. An adjacent color (secondary color) at the distance of the hue angle ± 15 - 30 ° is selected. The base color is set to differ in saturation and / or brightness from the adjacent color and is used to make the marking layer. The brightness of the neighboring color is set to be higher than that of the base color. The adjacent color is used for the production of the background layer.

Beispiele für geeignete Farbkombinationen lassen sich der folgenden Tabelle 3 entnehmen: Tabelle 3 Farbe 1 Farbe 2 H1 H1 ± 15°/30° L1 L2 > L1 C1 C2 Examples of suitable color combinations can be found in the following Table 3: Table 3 Color 1 Color 2 H 1 H 1 ± 15 ° / 30 ° L 1 L 2 > L 1 C 1 C 2

In allen Erfindungsaspekten und Varianten können die Kennzeichnungen ein Individualisierungskennzeichen für ein Wertdokument, wie etwa eine fortlaufende Seriennummer, einen Symbolcode, wie etwa einen Strich- oder Matrixcode, oder dergleichen, umfassen.In all aspects of the invention and variations, the tags may include an individualization tag for a value document such as a serial serial number, a symbol code such as a bar or matrix code, or the like.

Darüber hinaus kann die Untergrundschicht in Verbindung mit der Markierungsschicht eine visuell erfassbare Information bilden, die mit der im infraroten Spektralbereich erkennbaren Kennzeichnung in einem sinngemäßen Zusammenhang steht.In addition, the background layer, in conjunction with the marking layer, can form visually detectable information which is in a correspondence with the marking which can be recognized in the infrared spectral range.

Mit besonderem Vorteil werden Laserquellen im nahen Infrarot eingesetzt, da dieser Wellenlängenbereich gut zu den Absorptionseigenschaften der für Wertdokumente verwendeten Substrate und Druckfarben passt. Beispielsweise lassen sich für diesen Bereich leicht Druckfarben angeben, die für die Laserstrahlung transparent, im sichtbaren Spektralbereich für den menschlichen Betrachter jedoch opak und gefärbt sind. Mit besonderem Vorteil werden Infrarotlaser im Wellenlängenbereich von 0,8 µm bis 3 µm, insbesondere Nd:YAG-Laser oder Nd:YVO4-Laser, verwendet.Laser sources in the near infrared are used with particular advantage, since this wavelength range fits well with the absorption properties of the substrates and printing inks used for value documents. For example, it is easy to specify for this range printing inks which are transparent to the laser radiation but opaque and colored in the visible spectral range for the human observer. With particular advantage, infrared lasers in the wavelength range of 0.8 .mu.m to 3 .mu.m, in particular Nd: YAG laser or Nd: YVO 4 laser used.

Das Substrat des Datenträgers kann z.B. aus Papier, einer Folie oder einem Papier-Folien-Laminat gebildet sein. Der Datenträger stellt beispielsweise ein Sicherheitselement, ein blattförmiges Wertdokument oder den Kartenkörper einer Ausweiskarte, Kreditkarte oder dergleichen dar.The substrate of the data carrier may e.g. be formed of paper, a film or a paper-foil laminate. The data carrier represents, for example, a security element, a sheet-shaped value document or the card body of an identity card, credit card or the like.

Weitere Ausführungsbeispiele sowie Vorteile der Erfindung werden nachfolgend anhand der Figuren erläutert, bei deren Darstellung auf eine maßstabs- und proportionsgetreue Wiedergabe verzichtet wurde, um die Anschaulichkeit zu erhöhen.Further exemplary embodiments and advantages of the invention are explained below with reference to the figures, in the representation of which a representation true to scale and proportion has been dispensed with in order to increase the clarity.

Es zeigen:

Fig. 1
eine schematische Darstellung einer Banknote mit einem erfindungsgemäß gestalteten Kennzeichnungsbereich,
Fig. 2a
eine schematische Draufsicht auf den Kennzeichnungsbereich der in Fig. 1 gezeigten Banknote bei visueller Betrachtung mit bloßem Auge,
Fig. 2b
einen Querschnitt durch den Kennzeichnungsbereich von Figur 2a entlang der Linie A-A', und
Fig. 2c
eine schematische Draufsicht auf den Kennzeichnungsbereich der Figur 2a, aufgenommen mithilfe einer IR-Kamera bei Beleuchtung der Banknote mit einer IR-Lampe.
Show it:
Fig. 1
a schematic representation of a banknote with an inventively designed labeling area,
Fig. 2a
a schematic plan view of the marking area of in Fig. 1 banknote shown visually with the naked eye,
Fig. 2b
a cross-section through the marking region of Figure 2a along the line A-A ', and
Fig. 2c
a schematic plan view of the marking area of FIG. 2a , taken using an IR camera when the banknote is illuminated with an IR lamp.

Die Erfindung wird anhand des Beispiels einer Banknote näher erläutert. Fig. 1 zeigt dazu eine schematische Darstellung einer Banknote 10, die innerhalb eines Kennzeichnungsbereiches 12 mit der im infraroten Spektralbereich maschinell erfassbaren Kennzeichnung "1234" versehen ist.The invention will be explained in more detail with reference to the example of a banknote. Fig. 1 shows a schematic representation of a banknote 10, within an identification area 12 is provided with the "1234", which can be detected by machine in the infrared spectral range.

Fig. 2a zeigt den Kennzeichnungsbereich 12 der Banknote bei visueller Betrachtung mit bloßem Auge. Der Kennzeichnungsbereich weist eine im Untergrunddruck, z.B. Nass- oder Trockenoffsetdruck oder indirekter Hochdruck (insbesondere mit Nyloprintplatten), erzeugte, zweifarbige Untergrundschicht 22 in Form eines Linienrasters auf. Das Linienraster besteht aus blauen und violetten Linien, die sich einander abwechseln. Die Untergrundschicht 22 ist innerhalb des durch eine Ellipse beschriebenen Bereiches mit einer im Stichtiefdruck erzeugten Markierungsschicht 24 in Form eines Kreuzrasters aus sich schneidenden waagrechten und senkrechten Linien überdruckt. Die Markierungsschicht 24 wurde aus dunkelblauer, IRabsorbierender Stichdruckfarbe der Firma SICPA mit dem Handelsnamen SICPATALK® CBA erhalten. Die Markierungsschicht 24 weist eine durch die Rasterung und die zweifarbige Gestaltung der Untergrundschicht 22 getarnte, im sichtbaren Spektralbereich verborgenen Kennzeichnung "1234" auf. Die Einbringung der Kennzeichnung in die Markierungsschicht 24 erfolgt durch Laserbeaufschlagung mittels eines Nd-Vanadat-Festkörperlasers (Lasermodell: Laserbeschrifter der Firma Edgewave, "Innoslab IS8I-E"; Wellenlänge: 1064 nm; Leistung: 100 Watt; Pulslänge: 10 nsec; Scangeschwindigkeit: 1500-4500 mm/sec; Pulsfrequenz: 30-50 kHz). Fig. 2a shows the identification area 12 of the bill when visually viewed with the naked eye. The marking area has a two-colored background layer 22 in the form of a line grid produced in background printing, eg wet or dry offset printing or indirect high-pressure (in particular with nyprint plates). The line grid consists of blue and purple lines that alternate. The background layer 22 is overprinted within the area described by an ellipse with a marking layer 24 produced in the intaglio printing in the form of a cross grid of intersecting horizontal and vertical lines. The marking layer 24 was obtained from dark blue, IR absorbing stitch ink from SICPA under the trade name SICPATALK® CBA. The marking layer 24 has a marking "1234" camouflaged by the screening and the two-color design of the background layer 22 and hidden in the visible spectral range. The marking is introduced into the marking layer 24 by laser application by means of a Nd vanadate solid-state laser (laser model: Edgewave laser marker, "Innoslab IS8I-E"; wavelength: 1064 nm; power: 100 watts; pulse length: 10 nsec; 1500-4500 mm / sec, pulse rate: 30-50 kHz).

Fig. 2b zeigt dazu schematisch einen Querschnitt durch den Kennzeichnungsbereich von Figur 2a entlang der Linie A-A'. Wie anhand der Fig. 2b zu erkennen ist, enthält der auf das Papiersubstrat 30 der Banknote 10 aufgebrachte Kennzeichnungsbereich zwei Schichten: die Untergrundschicht 22 und die Markierungsschicht 24, die die Laserstrahlung des zur Kennzeichnung verwendeten Infrarotlasers absorbiert. Die Einwirkung der Laserstrahlung auf die IR-absorbierende Stichdruckfarbe der Markierungsschicht 24 führt zur Ablation des IR-Absorbers. Dabei kann auch ein Teil des Bindemittels und des Buntpigments der Stichdruckfarbe entfernt werden. Darüber hinaus erfolgt gleichzeitig eine Schwärzung 26 des mit Laser beaufschlagten Bereiches. Die Schwärzung 26 wird allerdings durch das Design der Markierungsschicht und der Untergrundschicht und durch die Wahl der Farben der Markierungsschicht und der Untergrundschicht getarnt und ist erst bei visueller Betrachtung mithilfe eines Mikroskops erkennbar (insbesondere in Form von Pixeln). Fig. 2b schematically shows a cross section through the labeling range of FIG. 2a along the line A-A '. As based on the Fig. 2b As can be seen, the marking area applied to the paper substrate 30 of the banknote 10 includes two layers: the background layer 22 and the marking layer 24, which absorbs the laser radiation of the infrared laser used for identification. The effect of the laser radiation to the IR-absorbing stitch ink of the marking layer 24 leads to the ablation of the IR absorber. In this case, a part of the binder and the colored pigment of the Stichdruckfarbe can be removed. In addition, a blackening 26 of the laser-exposed area takes place at the same time. The blackening 26, however, is camouflaged by the design of the marking layer and the background layer and by the choice of the colors of the marking layer and the background layer and can only be recognized by visual inspection with the aid of a microscope (in particular in the form of pixels).

Fig. 2c zeigt schematisch denselben Kennzeichnungsbereich Figur 2a bei Beleuchtung mit einer IR-Lampe, aufgenommen mit einer IR-Kamera. Die Banknote kann somit mit visuell unsichtbaren, maschinell jedoch einfach auslesbaren Individualisierungen versehen werden. Fig. 2c shows schematically the same labeling area FIG. 2a when illuminated with an IR lamp, taken with an IR camera. The banknote can thus be provided with visually invisible, but easily readable individualizations.

Mit Bezug auf die Farben der Untergrundschicht 22 und der Markierungsschicht 24 könnten beispielsweise auch die Farben Gelb und Grün für die Untergrundschicht 22 und die dunkles Ockergelb für die Markierungsschicht 24 verwendet werden.With respect to the colors of the background layer 22 and the marking layer 24, for example, the colors yellow and green for the background layer 22 and the dark ocher yellow for the marking layer 24 could also be used.

Des Weiteren kann die Markierungsschicht 24, die im Beispiel die Gestalt eines Kreuzrasters aufweist, mit Vorteil in Form von Guillochen oder anderen graphischen Elementen gebildet sein.Furthermore, the marking layer 24, which in the example has the shape of a cross grid, may advantageously be formed in the form of guilloches or other graphic elements.

Claims (9)

  1. A method for manufacturing a data carrier (10) having an indicator (26) in the form of patterns, letters, numbers or images that is recognizable in the infrared spectral range and hidden in the visible spectral range, comprising the steps of:
    making available a data carrier having a data carrier substrate (30), a background layer (22) formed by at least one printing ink and a marking layer (24) applied above the background layer, containing an IR-absorbing component and being produced by printing technology, wherein the color or the colors of the background layer differs or differ from the color of the marking layer;
    applying laser radiation to the data carrier, so that in the marking layer the indicator that is recognizable in the infrared spectral range is produced by removal of the IR-absorbing component, and the color change of the marking layer in the indicator region that is caused by the laser treatment and is recognizable in the visible spectral range is disguised by the background layer disposed thereunder,
    characterized in that the background layer and the marking layer are structured and that the marking layer is formed by an intaglio printed layer.
  2. The method according to claim 1, wherein the background layer and the marking layer respectively have a high area coverage, in particular independently of each other an area coverage of at least 40%, preferably in a range of 40 to 70%.
  3. The method according to any of the claims 1 or 2, wherein the background layer is formed in the form of a screen, in particular in the form of a line screen, and the marking layer is formed in the form of fine structures, in particular in the form of guilloches.
  4. The method according to any of the claims 1 to 3, wherein the background layer has screen elements of a first color and screen elements of a second color and the first color and the second color respectively differ from the color of the marking layer.
  5. The method according to any of the claims 1 to 4, wherein as laser source an infrared laser in the wavelength range of 0.8 µm to 3 µm, in particular a Nd:YAG laser or a Nd:YVO4 laser is employed.
  6. The method according to claim 5, wherein the infrared laser is operated at a pulse frequency in a range of 30 to 50 kHz, a power in a range of 10 to 300 Watt and a process speed in a range of 1500 to 10000 mm/sec.
  7. The method according to any of the claims 1 to 6, wherein the IR-absorbing component is chosen from the group of compounds consisting of copper(II) fluoride (CuF2), copper hydroxide fluoride (CuFOH), copper hydroxide (Cu(OH)2), copper phosphate (Cu3(PO4)2*2H2O), anhydrous copper phosphate (Cu3(PO4)2), the alkaline copper(II) phosphates Cu2PO4(OH) (Libethenite), Cu3(PO4)(OH)3 (Cornetite), Cu5(PO4)3(OH)4 (Pseudomalachite), CuAl6(PO4)4(OH)8*5H2O (Turquoise), copper(II) pyrophosphate (Cu2(P2O7*3H2O), anhydrous copper(II) pyrophosphate (Cu2(P2O7)), copper(II) metaphosphate (Cu3(P3O9)2), iron(II) fluoride (FeF2*4H2O), anhydrous iron(II) fluoride (FeF2), iron(II) phosphate (Fe3(PO4)2*8H2O, Vivianite), lithium iron(II) phosphate (LiFePO4, Triphylite), sodium iron(II) phosphate (NaFePO4, Maricite), iron(II) silicates (Fe2SiO4, Fayalite; FexMg2-xSiO4, Olivine), iron(II) carbonate (FeCo3, Ankerite, Siderite); nickel(II) phosphate (Ni3(PO4)2*8H2O), titanium(III) metaphosphate (Ti(P3O9)), Ca2Fe(PO4)2*4H2O (Anapaite) and MgFe(PO4)F (Wagnerite).
  8. The method according to any of the claims 1 to 7, wherein the data carrier is a value document.
  9. A data carrier obtainable by the method according to any of the claims 1 to 8.
EP13000578.8A 2012-02-07 2013-02-05 Method for producing a data carrier and data carrier obtainable therefrom Not-in-force EP2626215B1 (en)

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PL13000578T PL2626215T3 (en) 2012-02-07 2013-02-05 Method for producing a data carrier and data carrier obtainable therefrom

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DE102012002296A DE102012002296A1 (en) 2012-02-07 2012-02-07 Method for producing a data carrier and data carrier available therefrom

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EP2626215A1 EP2626215A1 (en) 2013-08-14
EP2626215B1 true EP2626215B1 (en) 2015-06-03

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PL233721B1 (en) * 2017-07-21 2019-11-29 Polska Wytwornia Papierow Wartosciowych Spolka Akcyjna Element intended to protect a document, a document of value that includes the protective element and method for producing the document of value
AU2019269892B2 (en) * 2018-05-15 2024-01-25 Sicpa Holding Sa Machine readable security features
TWI829917B (en) * 2019-05-28 2024-01-21 瑞士商西克帕控股有限公司 Security inks and machine readable security features

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DE3048733C2 (en) 1980-12-23 1983-06-16 GAO Gesellschaft für Automation und Organisation mbH, 8000 München "Identity card and process for producing the same"
SI1790701T2 (en) 2005-11-25 2012-05-31 Sicpa Holding Sa IR-absorbing intaglio ink
EP2585973A2 (en) * 2010-06-25 2013-05-01 Omarco Network Solutions Limited Security improvements for flexible substrates

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