EP2660065A2 - 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 PDFInfo
- Publication number
- EP2660065A2 EP2660065A2 EP13002193.4A EP13002193A EP2660065A2 EP 2660065 A2 EP2660065 A2 EP 2660065A2 EP 13002193 A EP13002193 A EP 13002193A EP 2660065 A2 EP2660065 A2 EP 2660065A2
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- EP
- European Patent Office
- Prior art keywords
- layer
- color
- absorbing
- laser radiation
- data carrier
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- 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.)
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Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/24—Ablative recording, e.g. by burning marks; Spark recording
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
Definitions
- the invention relates to a data carrier, in particular a value document such as a banknote, with a recognizable in the infrared and in the visible spectral marking in the form of patterns, letters, numbers or images.
- a data carrier in particular a value document such as a banknote, with a recognizable in the infrared and in the visible 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 in the introduction, which has a laser-generated individual identification of high counterfeit security with a visually attractive and testable appearance.
- the label should occupy little space on the disk and be easy to integrate into existing designs or print images.
- the paint mist precipitate formed in step b) is uniform in the form of a continuous layer so that the obtained first image area of the color layer is perceptible to the viewer in the infrared and in the visible spectral range substantially in the form of an optically homogeneous area.
- the color mist precipitate formed in step b) is in the form of a discontinuous layer with raster elements and intermediate void areas, the raster elements and the void areas being compared to the raster elements and void areas of the IR absorbing ink layer prior to the step of Be charged with laser radiation in their arrangement are reversed.
- the data carrier provided in step a) above the data carrier substrate (in particular between the data carrier substrate and the IR-absorbing and laser-radiation-modifiable color layer) has a print-produced (in particular IR-transparent) background layer whose color is different from the color the IR-absorbing and modifiable by laser radiation color layer is different.
- the background layer produced by printing technology is a structured background layer having raster elements, wherein the raster elements are arranged offset relative to the raster elements of the IR-absorbing and laser-modifiable color layer.
- the raster elements of the formed color mist precipitate overlap with the raster elements of the background layer and form a mixed color in the overlapping area, which differs from the color of the IR-absorbing and laser radiation modifiable color layer and the color of the background layer.
- the IR-absorbing and laser radiation modifiable color layer can be formed in particular by a gravure printing layer.
- the IR-absorbing and laser-radiation-modifiable ink layer may be, in particular, a color layer applied to the substrate in wet or dry offset printing, or in indirect high-pressure (in particular with nyprint plates), or in flexographic printing.
- both the IR-absorbing and laser radiation modifiable color layer of the provided data carrier, as well as the above-mentioned, optionally existing background layer can each be structured in the form of a line grid.
- step b) the application of laser radiation from the substrate front side, on which the IR-absorbing and modifiable by laser radiation color layer is applied, ago forth.
- the application of laser radiation in step b) can be carried out by the substrate rear side lying opposite the IR-absorbing and laser-modifiable ink layer.
- a second aspect of the invention relates to a data carrier obtainable by the method according to the first aspect of the invention.
- IR-absorbing printing inks which are suitable for producing the laser-radiation-modifiable ink layer can be based, for example, on a color mixture of absorbing color components and non-absorbing color components.
- the color mixture contains, for example, carbon black, graphite or TiO 2 .
- IR-absorbing inks are, for example, in EP 1 790 701 A1 and commercially available from SICPA under the trade names SICPATALK®CBA and SICPATALK®NFB.
- the IR-absorbing component is in particular 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 which contains 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 the transition element ion or the transition element ions are coordinated to the phosphate and / or fluoride anions are present 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 - ) may be selected.
- 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- silicate
- the condensed polysilicates titan
- 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 polymer binder of the ink.
- 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 be, in particular, 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 printing inks which are suitable for the production of the IR-absorbing and laser-radiation-modifiable ink layer may additionally contain at least one colored pigment.
- sublimation and resublimation is to be understood here as a process in which the respective solids are first converted into the gas phase and then deposited again in solid form on the substrate.
- the solids may be in ionized form.
- 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 laser is advantageously operated in continuous mode ("continuous wave mode") or with a high pulse length (greater than 50 ns).
- the IR-absorbing and laser-radiation-modifiable color layer has a high areal coverage, in particular an areal coverage of more than 40%, preferably in a range of 40 to 70%.
- the color layer may in particular be in the form of fine structures or raster elements, eg in the form of guilloches, Microtext, graphic elements or the like may be formed, wherein a color layer in the form of a line, dot or cross grid is preferred and a color layer in the form of a line grid is particularly preferred.
- the raster lines typically have a thickness in a range of 0.05 mm to 0.5 mm.
- the optionally present (in particular IR-transparent) background layer can be present as a full-surface layer or as a partial-area or structured layer.
- the background layer is preferably in the form of a line, dot or cross pattern, a line pattern being particularly preferred.
- the tags obtainable in accordance with the invention may include an individualization tag for a value document, such as a serial serial number, a symbol code such as a bar code or matrix code, or the like.
- an individualization tag for a value document such as a serial serial number, a symbol code such as a bar code or matrix code, or the like.
- graphic or numerical elements, such as a value number can be used, which are not used to distinguish the individual value documents.
- 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 with an identification area 12.
- Fig. 2a shows the identification area 12 of the banknote 10 according to a first embodiment before the step of applying laser.
- the first embodiment falls under the first preferred embodiment described in the Summary of the Invention.
- the Indian Fig. 2a The marking area shown is schematically simplified and shows a numerically limited number of lines and empty areas in magnification.
- the identification area includes an inner image area 25 and an outer image area 22 which frames the inner image area 25.
- the marking area has a stamped printing Line grid with ocher-brown lines 23 and arranged therebetween empty areas 24 on. As intaglio ink, ocher brown with carbon black was used as the IR absorbing component.
- empty area used in the present description should be understood to mean that within this area there is no IR-absorbing and laser-radiation-modifiable color layer; within the empty area, however, an (in particular IR-transparent) background pressure may optionally be present.
- Fig. 2b shows a schematic plan view of the marking area of in Fig.1 bank note according to the first embodiment after the step of laser exposure.
- the dashed line region 26 which represents the laser-exposed area, the ocher-brown intaglio ink is uniformly distributed in the form of a homogeneous layer.
- the introduction of the mark 26 was carried out by laser application by means of a Nd-vanadate solid-state laser (laser model: Edgewave, "Innoslab IS8I-E"; wavelength: 1064 nm; power: 100 watts; continuous-wave operation, scanning speed: 2.5 to 5 m / sec).
- Fig. 3a shows the identification area 12 of the banknote 10 according to a second embodiment prior to the step of applying laser.
- the second embodiment falls under the second preferred embodiment described in the summary of the invention.
- the Indian Fig. 3a The marking area shown is schematically simplified and shows a numerically limited number of lines and empty areas in magnification.
- the label area includes an inner image area 35 and an outer image area 32 that frame the inner image area 35 surrounds.
- the marking area has a nylprint-printed line grid with blue lines 33 and empty areas 34 arranged therebetween.
- the ink used was a mixture of IR-absorbing and IR-transparent ink (shade Pantone 7470, prepared with carbon black, so that a reflectance ⁇ 50% at 850 nm sets).
- Fig. 3b shows a schematic plan view of the marking area of in Fig.1 bank note according to the second embodiment after the step of the laser application.
- dashed line area 36 which represents the laser-exposed area
- the IR-absorbing ink layer was removed.
- Part of the paint has been deposited within the areas that are in the Fig. 3a the blank areas 34 formed within the inner image area 35.
- the raster elements and the dummy areas are interchanged as compared with the raster elements and vacant areas of the IR absorbing ink layer prior to the step of impinging laser radiation (this phenomenon will be referred to as "pattern inversion" hereinafter).
- the formation of the color mist precipitate in the form of a discontinuous layer may be accompanied, in addition, by the formation of a streak-shaped, continuous-layer color mist precipitate in an edge region adjoining the laser-exposed region (see below with reference to FIGS in Fig. 3b shown variant).
- FIG. 3b shows a schematic plan view of the marking area of in Fig. 1 shown banknote according to a variant of the second embodiment after the step of the laser application.
- the FIG Fig. 3b Flag 36 shown on an existing of IR-absorbing ink border. The formation of the border is attributed to the fact that the laser treatment (depending on the control of the conditions) can in part cause bleeding of the IR-absorbing ink during the laser treatment.
- the effect achieved by the laser application depends on many parameters: power, intensity and total energy of the laser radiation; Binders, additives and colorants (including pigments), and the thickness and method of printing inks; Extraction of the resulting vapors and dusts as well as movement speed of the laser-exposed object.
- the laser conditions selected in the second embodiment were similar to the above first embodiment.
- the ink used to form the IR-absorbing ink layer was chosen differently in its color composition (ie, the amount of IR absorber contained).
- Fig. 4a shows the identification area 12 of the banknote 10 according to a third embodiment before the step of applying laser.
- the third embodiment is a particular variant of the second preferred embodiment described in the summary of the invention, in which the data carrier substrate is first provided with an IR transparent, screened background layer and then provided with a screened, IR-absorbing ink layer.
- the Indian Fig. 4a The marking area shown is schematically simplified and shows a numerically limited number of lines and empty areas in magnification.
- the identification area includes an inner image area 45 and an outer image area 42 which frame-shape the inner image area 45.
- the marking area has a nyloprint-printed line grid with blue lines 43 and empty areas arranged in between.
- the ink used was the IR-absorbing ink mentioned in the above example.
- the tag area further includes a background layer disposed above the data carrier substrate.
- the background layer is produced in the form of a line grid with yellow lines 47 and empty areas arranged in between.
- an IR-transparent, yellow color was used which is applied to the substrate in wet or dry offset printing or in indirect high-pressure (in particular with nyprint plates).
- Fig. 4b shows a schematic plan view of the marking area of in Fig.1 banknote according to the third embodiment after the step of the laser application.
- the dashed line area 46 which represents the laser-exposed area
- the blue, IR-absorbing ink layer 43 has been removed.
- Part of the blue color has been deposited within the areas that are in the Fig. 4a the spaces of blue arranged between the blue lines 43 formed within the inner image area 45.
- the resulting raster elements formed by the blue intaglio ink and the void regions are interchanged with the raster elements and void regions formed by the blue intaglio ink prior to the step of impinging laser radiation.
- the color mist precipitate 48 of the sublimed and again deposited on the substrate blue intaglio ink leads partially to a green mixed color.
- the green mixed color is particularly indicative of the center of the lines 48 where the blue color mist precipitate overlaps the yellow background lines 47.
- the blue color of the paint mist precipitate predominates.
- the laser conditions selected in the third embodiment were similar to those in the above first and second embodiments.
- the banknote substrate used was based on paper.
- substrates based on plastic or based on multilayer plastic / paper / plastic composites or paper / plastic / paper composites can be used in the same way.
- Fig. 5 shows a schematic representation of an arrangement for identifying a data carrier.
- the data carrier which has a substrate 50 and an IR-absorbing ink layer 52, is thereby exposed to laser radiation from the substrate front side.
- the deposition of the sublimed ink onto the substrate can be improved by placing an IR transparent cover 60, eg a foil, between the laser source and the substrate 50.
- the distance between the cover 60 and the substrate should be less than 5 mm.
- Fig. 6 shows an alternative arrangement for identifying a data carrier.
- the data carrier comprising a substrate 50 and an IR-absorbing ink layer 52, is thereby acted upon by the substrate rear side forth with laser radiation.
- the substrate 50 is resting on a support 70 (eg, a blanket or pad of paper).
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Abstract
Description
Die Erfindung betrifft einen Datenträger, insbesondere ein Wertdokument wie etwa eine Banknote, mit einer im infraroten und im sichtbaren 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 and in the visible 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
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.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.
Ausgehend davon liegt der Erfindung die Aufgabe zugrunde, einen Datenträger der eingangs genannten Art bereitzustellen, der eine lasergenerierte individuelle Kennzeichnung hoher Fälschungssicherheit bei visuell attraktivem und prüfbarem Erscheinungsbild 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 in the introduction, which has a laser-generated individual identification of high counterfeit security with a visually attractive and testable appearance. 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.
Ein erster Aspekt der Erfindung betrifft ein Verfahren zum Herstellen eines Datenträgers, wie etwa ein Wertdokument oder ein Sicherheitspapier, mit einem im infraroten und im sichtbaren Spektralbereich erkennbaren Kennzeichen, insbesondere in Form von Mustern, Buchstaben, Zahlen oder Bildern, umfassend die Schritte:
- a) Bereitstellen eines Datenträgers mit einem Datenträgersubstrat, das eine IR-absorbierende und mittels Laserstrahlung modifizierbare Farbschicht aufweist, wobei die Farbschicht strukturiert in Form von Rasterelementen und dazwischen angeordneten Leerbereichen vorliegt;
- b) Beaufschlagen eines Teils der IR-absorbierenden Farbschicht mit Laserstrahlung, so dass sich die behandelte Farbschicht durch Einwirkung der Laserstrahlung in einem Prozess aus Desorption (bzw. Sublimation) und Sorption (bzw. Resublimation) vom Datenträgersubstrat ablöst und in Form eines Farbnebels auf dem Datenträgersubstrat niederschlägt, um auf diese Weise einen das Kennzeichen darstellenden Bildbereich (den sogenannten ersten Bildbereich) in der Farbschicht auszubilden, der für den Betrachter im infraroten und im sichtbaren Spektralbereich von dem nicht mit Laserstrahlung beaufschlagten Bildbereich (dem sogenannten zweiten Bildbereich) der Farbschicht optisch unterscheidbar ist.
- a) providing a data carrier with a data carrier substrate which has an IR-absorbing and laser radiation modifiable color layer, wherein the color layer is structured in the form of raster elements and arranged therebetween empty areas;
- b) applying a portion of the IR-absorbing ink layer with laser radiation, so that the treated ink layer by the action of laser radiation in a process of desorption (or sublimation) and sorption (or resublimation) detached from the data carrier substrate and in the form of a mist on the Disk substrate precipitates to form in this way a characteristic image area (the so-called first image area) in the color layer, optically distinguishable to the viewer in the infrared and visible spectral range of the not irradiated with laser radiation image area (the so-called second image area) of the color layer is.
Gemäß einer ersten bevorzugten Ausgestaltung ist der im Schritt b) gebildete Farbnebel-Niederschlag in Form einer kontinuierlichen Schicht gleichmäßig verteilt, so dass der erhaltene erste Bildbereich der Farbschicht für den Betrachter im infraroten und im sichtbaren Spektralbereich im Wesentlichen in Form einer optisch homogenen Fläche wahrnehmbar ist.According to a first preferred embodiment, the paint mist precipitate formed in step b) is uniform in the form of a continuous layer so that the obtained first image area of the color layer is perceptible to the viewer in the infrared and in the visible spectral range substantially in the form of an optically homogeneous area.
Gemäß einer alternativen zweiten bevorzugten Ausgestaltung liegt der im Schritt b) gebildete Farbnebel-Niederschlag in Form einer diskontinuierlichen Schicht mit Rasterelementen und dazwischen angeordneten Leerbereichen vor, wobei die Rasterelemente und die Leerbereiche verglichen mit den Rasterelementen und Leerbereichen der IR-absorbierenden Farbschicht vor dem Schritt des Beaufschlagens mit Laserstrahlung in ihrer Anordnung vertauscht sind. Gemäß einer Variante der alternativen zweiten bevorzugten Ausgestaltung wird die Bildung des Farbnebel-Niederschlags in Form einer diskontinuierlichen Schicht im Schritt b) in einem Randbereich, der an den ersten Bildbereich (d.h. an den mit Laser beaufschlagten Bereich) angrenzt, zusätzlich von der Bildung eines streifenförmigen, durch eine kontinuierliche Schicht gebildeten Farbnebel-Niederschlags begleitet.According to an alternative second preferred embodiment, the color mist precipitate formed in step b) is in the form of a discontinuous layer with raster elements and intermediate void areas, the raster elements and the void areas being compared to the raster elements and void areas of the IR absorbing ink layer prior to the step of Be charged with laser radiation in their arrangement are reversed. According to a variant of the alternative second preferred embodiment, the formation of the color mist precipitate in the form of a discontinuous layer in step b) in an edge region which adjoins the first image region (ie to the laser-exposed region), in addition to the formation of a strip-shaped accompanied by a continuous layer formed color mist precipitate.
Es wird allgemein bevorzugt, dass der im Schritt a) bereitgestellte Datenträger oberhalb des Datenträgersubstrats (insbesondere zwischen dem Datenträgersubstrat und der IR-absorbierenden und mittels Laserstrahlung modifizierbaren Farbschicht) eine drucktechnisch erzeugte (insbesondere IR-transparente) Untergrundschicht aufweist, deren Farbe sich von der Farbe der IR-absorbierenden und mittels Laserstrahlung modifizierbaren Farbschicht unterscheidet. In einer Variante der zweiten bevorzugten Ausgestaltung handelt es sich bei der drucktechnisch erzeugten Untergrundschicht um eine strukturierte, Rasterelemente aufweisende Untergrundschicht, wobei die Rasterelemente zu den Rasterelementen der IR-absorbierenden und mittels Laserstrahlung modifizierbaren Farbschicht versetzt angeordnet sind. Es wird insbesondere bevorzugt, dass die Rasterelemente des gebildeten Farbnebel-Niederschlags mit den Rasterelementen der Untergrundschicht überlappen und im Überlappungsbereich eine Mischfarbe bilden, die sich von der Farbe der IR-absorbierenden und mittels Laserstrahlung modifizierbaren Farbschicht und von der Farbe der Untergrundschicht unterscheidet.It is generally preferred that the data carrier provided in step a) above the data carrier substrate (in particular between the data carrier substrate and the IR-absorbing and laser-radiation-modifiable color layer) has a print-produced (in particular IR-transparent) background layer whose color is different from the color the IR-absorbing and modifiable by laser radiation color layer is different. In a variant of the second preferred embodiment, the background layer produced by printing technology is a structured background layer having raster elements, wherein the raster elements are arranged offset relative to the raster elements of the IR-absorbing and laser-modifiable color layer. It is particularly preferred that the raster elements of the formed color mist precipitate overlap with the raster elements of the background layer and form a mixed color in the overlapping area, which differs from the color of the IR-absorbing and laser radiation modifiable color layer and the color of the background layer.
Die IR-absorbierende und mittels Laserstrahlung modifizierbare Farbschicht kann insbesondere durch eine Stichtiefdruckschicht gebildet werden. Gemäß einer Alternative kann die IR-absorbierende und mittels Laserstrahlung modifizierbare Farbschicht insbesondere eine im Nass- oder Trockenoffsetdruck, oder im indirekten Hochdruck (insbesondere mit Nyloprintplatten), oder im Flexodruck auf das Substrat applizierte Farbschicht sein.The IR-absorbing and laser radiation modifiable color layer can be formed in particular by a gravure printing layer. According to an alternative, the IR-absorbing and laser-radiation-modifiable ink layer may be, in particular, a color layer applied to the substrate in wet or dry offset printing, or in indirect high-pressure (in particular with nyprint plates), or in flexographic printing.
Darüber hinaus können sowohl die IR-absorbierende und mittels Laserstrahlung modifizierbare Farbschicht des bereitgestellten Datenträgers, als auch die oben erwähnte, optional vorhandene Untergrundschicht jeweils strukturiert in Form eines Linienrasters vorliegen.In addition, both the IR-absorbing and laser radiation modifiable color layer of the provided data carrier, as well as the above-mentioned, optionally existing background layer can each be structured in the form of a line grid.
Im Schritt b) kann die Beaufschlagung mit Laserstrahlung von der Substratvorderseite, auf der die IR-absorbierende und mittels Laserstrahlung modifizierbare Farbschicht aufgebracht ist, her erfolgen. Alternativ kann die Beaufschlagung mit Laserstrahlung im Schritt b) von der der IR-absorbierenden und mittels Laserstrahlung modifizierbaren Farbschicht gegenüber liegenden Substratrückseite her erfolgen.In step b), the application of laser radiation from the substrate front side, on which the IR-absorbing and modifiable by laser radiation color layer is applied, ago forth. Alternatively, the application of laser radiation in step b) can be carried out by the substrate rear side lying opposite the IR-absorbing and laser-modifiable ink layer.
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.
IR-absorbierende Druckfarben, die zur Herstellung der mittels Laserstrahlung modifizierbaren Farbschicht geeignet sind, können z.B. auf einem Farbgemisch aus absorbierenden Farbkomponenten und nicht absorbierenden Farbkomponenten beruhen. Als absorbierende Farbkomponente enthält das Farbgemisch z.B. Ruß, Graphit oder TiO2.IR-absorbing printing inks which are suitable for producing the laser-radiation-modifiable ink layer can be based, for example, on a color mixture of absorbing color components and non-absorbing color components. As an absorbing color component, the color mixture contains, for example, carbon black, graphite or TiO 2 .
Weitere geeignete IR-absorbierende Druckfarben sind z.B. in der
Die IR-absorbierenden Druckfarben, die zur Herstellung der IR-absorbierenden und mittels Laserstrahlung modifizierbaren Farbschicht geeignet sind, können darüber hinaus zumindest ein Buntpigment enthalten.The IR-absorbing printing inks which are suitable for the production of the IR-absorbing and laser-radiation-modifiable ink layer may additionally contain at least one colored pigment.
Die Laserbeaufschlagung der IR-absorbierenden und mittels Laserstrahlung modifizierbaren Farbschicht führt zur Sublimation (bzw. Desorption) und Resublimation (bzw. Sorption) der Farbschicht-Bestandteile. Mit der Formulierung "Sublimation und Resublimation" (bzw. "Desorption und Sorption") ist hierin ein Prozess zu verstehen, in dem die jeweiligen Feststoffe zunächst in die Gasphase überführt und anschließend wieder in fester Form auf das Substrat abgeschieden werden. In der Gasphase können die Feststoffe darüber hinaus in ionisierter Form vorliegen.The laser exposure of the IR-absorbing and modifiable by laser radiation color layer leads to sublimation (or desorption) and Resublimation (or sorption) of the color layer components. The term "sublimation and resublimation" (or "desorption and sorption") is to be understood here as a process in which the respective solids are first converted into the gas phase and then deposited again in solid form on the substrate. In addition, in the gas phase, the solids may be in ionized form.
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. Darüber hinaus wird der Laser mit Vorteil im kontinuierlichen Modus ("continuous wave Betrieb") oder mit hoher Pulslänge (größer als 50 ns) betrieben.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. In addition, the laser is advantageously operated in continuous mode ("continuous wave mode") or with a high pulse length (greater than 50 ns).
Mit Bezug auf das Design wird bevorzugt, dass die IR-absorbierende und mittels Laserstrahlung modifizierbare Farbschicht eine hohe Flächendeckung aufweist, insbesondere eine Flächendeckung von mehr als 40%, bevorzugt in einem Bereich von 40 bis 70%. Die Farbschicht kann insbesondere in Form von feinen Strukturen bzw. Rasterelementen, z.B. in Form von Guillochen, Mikrotext, graphischen Elementen oder dergleichen gebildet sein, wobei eine Farbschicht in Form eines Linien-, Punkt- oder Kreuzrasters bevorzugt ist und eine Farbschicht in Form eines Linienrasters besonders bevorzugt ist. Die Rasterlinien haben typischerweise eine Dicke in einem Bereich von 0,05 mm bis 0,5 mm.With regard to the design, it is preferred that the IR-absorbing and laser-radiation-modifiable color layer has a high areal coverage, in particular an areal coverage of more than 40%, preferably in a range of 40 to 70%. The color layer may in particular be in the form of fine structures or raster elements, eg in the form of guilloches, Microtext, graphic elements or the like may be formed, wherein a color layer in the form of a line, dot or cross grid is preferred and a color layer in the form of a line grid is particularly preferred. The raster lines typically have a thickness in a range of 0.05 mm to 0.5 mm.
Die gegebenenfalls vorhandene (insbesondere IR-transparente) Untergrundschicht kann als vollflächige Schicht oder als teilflächige bzw. strukturierte Schicht vorliegen. Im Falle einer strukturierten Schicht liegt die Untergrundschicht vorzugsweise als Linien-, Punkt- oder Kreuzraster vor, wobei ein Linienraster insbesondere bevorzugt wird.The optionally present (in particular IR-transparent) background layer can be present as a full-surface layer or as a partial-area or structured layer. In the case of a structured layer, the background layer is preferably in the form of a line, dot or cross pattern, a line pattern being particularly preferred.
In allen Erfindungsaspekten und Varianten können die erfindungsgemäß erhältlichen Kennzeichen ein Individualisierungskennzeichen für ein Wertdokument, wie etwa eine fortlaufende Seriennummer, einen Symbolcode, wie etwa einen Strich- oder Matrixcode, oder dergleichen, umfassen. Außerdem können auch grafische oder numerische Elemente, wie zum Beispiel eine Wertzahl, verwendet werden, die nicht zum Unterscheiden der einzelnen Wertdokumente dienen.In all aspects of the invention and variants, the tags obtainable in accordance with the invention may include an individualization tag for a value document, such as a serial serial number, a symbol code such as a bar code or matrix code, or the like. In addition, graphic or numerical elements, such as a value number, can be used, which are not used to distinguish the individual value documents.
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 gemäß einem ersten Ausführungsbeispiel vor dem Schritt der Laserbeaufschlagung; - Fig. 2b
- eine schematische Draufsicht auf den Kennzeichnungsbereich der in
Fig.1 gezeigten Banknote gemäß einem ersten Ausführungsbeispiel nach dem Schritt der Laserbeaufschlagung; - Fig. 3a
- eine schematische Draufsicht auf den Kennzeichnungsbereich der in
Fig.1 gezeigten Banknote gemäß einem zweiten Ausführungsbeispiel vor dem Schritt der Laserbeaufschlagung; - Fig. 3b
- eine schematische Draufsicht auf den Kennzeichnungsbereich der in
Fig.1 gezeigten Banknote gemäß einem zweiten Ausführungsbeispiel nach dem Schritt der Laserbeaufschlagung; - Fig. 3c
- eine schematische Draufsicht auf den Kennzeichnungsbereich der in
Fig.1 gezeigten Banknote gemäß einer Variante des zweiten Ausführungsbeispiels nach dem Schritt der Laserbeaufschlagung; - Fig. 4a
- eine schematische Draufsicht auf den Kennzeichnungsbereich der in
Fig.1 gezeigten Banknote gemäß einem dritten Ausführungsbeispiel vor dem Schritt der Laserbeaufschlagung; - Fig. 4b
- eine schematische Draufsicht auf den Kennzeichnungsbereich der in
Fig. 1 gezeigten Banknote gemäß einem dritten Ausführungsbeispiel nach dem Schritt der Laserbeaufschlagung; - Fig. 5
- eine schematische Darstellung einer Anordnung zur Kennzeichnung eines Datenträgers gemäß einer ersten Variante; und
- Fig. 6
- eine schematische Darstellung einer Anordnung zur Kennzeichnung eines Datenträgers gemäß einer zweiten Variante.
- 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 according to a first embodiment before the step of the laser application; - Fig. 2b
- a schematic plan view of the marking area of in
Fig.1 bank note according to a first embodiment after the step of the laser application; - Fig. 3a
- a schematic plan view of the marking area of in
Fig.1 banknote according to a second embodiment before the step of the laser application; - Fig. 3b
- a schematic plan view of the marking area of in
Fig.1 banknote according to a second embodiment after the step of the laser application; - Fig. 3c
- a schematic plan view of the marking area of in
Fig.1 banknote shown according to a variant of the second embodiment after the step of the laser application; - Fig. 4a
- a schematic plan view of the marking area of in
Fig.1 banknote according to a third embodiment before the step of the laser application; - Fig. 4b
- a schematic plan view of the marking area of in
Fig. 1 banknote according to a third embodiment after the step of the laser application; - Fig. 5
- a schematic representation of an arrangement for identifying a data carrier according to a first variant; and
- Fig. 6
- a schematic representation of an arrangement for identifying a data carrier according to a second variant.
Die Erfindung wird anhand des Beispiels einer Banknote näher erläutert.
Der in der vorliegenden Beschreibung verwendete Begriff "Leerbereich" ist so zu verstehen, dass sich innerhalb dieses Bereichs keine IR-absorbierende und mittels Laserstrahlung modifizierbare Farbschicht befindet; innerhalb des Leerbereichs kann aber gegebenenfalls ein (insbesondere IR-transparenter) Untergrunddruck vorhanden sein.The term "empty area" used in the present description should be understood to mean that within this area there is no IR-absorbing and laser-radiation-modifiable color layer; within the empty area, however, an (in particular IR-transparent) background pressure may optionally be present.
Die Bildung des Farbnebel-Niederschlags in Form einer diskontinuierlichen Schicht kann unter Umständen in einem Randbereich, der an den mit Laser beaufschlagten Bereich angrenzt, zusätzlich von der Bildung eines streifenförmigen, durch eine kontinuierliche Schicht gebildeten Farbnebel-Niederschlags begleitet sein (siehe die nachstehend anhand der in
Der durch die Laserbeaufschlagung erziele Effekt hängt von vielen Parametern ab: Leistung, Intensität und Gesamtenergie der Laserstrahlung; Bindemittel, Zusatzstoffe und farbgebende Stoffe (u. a. Pigmente) sowie Auftragsstärke und -verfahren der Druckfarben; Absaugung der entstehenden Dämpfe und Stäube sowie Bewegungsgeschwindigkeit des mit Laser beaufschlagten Objektes. Die im zweiten Ausführungsbeispiel (sowie auch in der Variante des zweiten Ausführungsbeispiels) gewählten Laserbedingungen waren ähnlich wie im obigen ersten Ausführungsbeispiel. Anders als im ersten Ausführungsbeispiel wurde die zur Erzeugung der IR-absorbierenden Farbschicht herangezogene Druckfarbe in ihrer Farbzusammensetzung (d.h. der Menge des enthaltenen IR-Absorbers) anders gewählt. Durch geschickte Einstellung aller Parameter wurde erreicht, dass der Farbnebel-Niederschlag nicht zu einer kontinuierlichen homogenen Fläche (Bezugsnummer 26 in
Die im dritten Ausführungsbeispiel gewählten Laserbedingungen waren ähnlich den in den obigen ersten und zweiten Ausführungsbeispielen.The laser conditions selected in the third embodiment were similar to those in the above first and second embodiments.
In den obigen Ausführungsbeispielen beruhte das verwendete Banknotensubstrat auf Papier. Substrate auf Kunststoff-Basis oder auf Basis von mehrschichtigen Kunststoff/ Papier/ Kunststoff-Verbunden oder Papier/ Kunststoff/ Papier-Verbunden können aber in gleicher Weise verwendet werden.In the above embodiments, the banknote substrate used was based on paper. However, substrates based on plastic or based on multilayer plastic / paper / plastic composites or paper / plastic / paper composites can be used in the same way.
Claims (15)
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DE201210008927 DE102012008927A1 (en) | 2012-04-30 | 2012-04-30 | Method for producing a data carrier and data carrier available therefrom |
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EP13002193.4A Withdrawn EP2660065A3 (en) | 2012-04-30 | 2013-04-25 | Method for producing a data carrier and data carrier obtainable therefrom |
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Cited By (1)
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CN112117209A (en) * | 2019-06-21 | 2020-12-22 | 上海微电子装备(集团)股份有限公司 | Silicon wafer adsorption device and laser annealing equipment |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3048733A1 (en) | 1980-12-23 | 1982-07-08 | GAO Gesellschaft für Automation und Organisation mbH, 8000 München | "ID CARD AND METHOD FOR PRODUCING THE SAME" |
EP1790701A1 (en) | 2005-11-25 | 2007-05-30 | Sicpa Holding S.A. | IR-absorbing intaglio ink |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4865198A (en) * | 1988-02-01 | 1989-09-12 | R. J. Reynolds Tobacco Company | Overwrapped package with tamper indicating means |
DE102004057918A1 (en) * | 2004-11-30 | 2006-06-01 | Merck Patent Gmbh | Laser marking of value documents |
-
2012
- 2012-04-30 DE DE201210008927 patent/DE102012008927A1/en not_active Withdrawn
-
2013
- 2013-04-25 EP EP13002193.4A patent/EP2660065A3/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3048733A1 (en) | 1980-12-23 | 1982-07-08 | GAO Gesellschaft für Automation und Organisation mbH, 8000 München | "ID CARD AND METHOD FOR PRODUCING THE SAME" |
EP1790701A1 (en) | 2005-11-25 | 2007-05-30 | Sicpa Holding S.A. | IR-absorbing intaglio ink |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112117209A (en) * | 2019-06-21 | 2020-12-22 | 上海微电子装备(集团)股份有限公司 | Silicon wafer adsorption device and laser annealing equipment |
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