EP2860043B1 - Method of forming a watermark - Google Patents

Method of forming a watermark Download PDF

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Publication number
EP2860043B1
EP2860043B1 EP14003159.2A EP14003159A EP2860043B1 EP 2860043 B1 EP2860043 B1 EP 2860043B1 EP 14003159 A EP14003159 A EP 14003159A EP 2860043 B1 EP2860043 B1 EP 2860043B1
Authority
EP
European Patent Office
Prior art keywords
watermark
layer
printed
data carrier
produce
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14003159.2A
Other languages
German (de)
French (fr)
Other versions
EP2860043A1 (en
Inventor
Karlheinz Mayer
Johannes Luyken
Thomas Tarantino
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 Mobile Security GmbH
Original Assignee
Giesecke and Devrient GmbH
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Publication date
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Publication of EP2860043A1 publication Critical patent/EP2860043A1/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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • 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
    • B41M3/10—Watermarks
    • 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
    • B42D25/333—Watermarks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/425—Marking by deformation, e.g. embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0029—Formation of a transparent pattern using a liquid marking fluid
    • B42D2033/24—

Definitions

  • the present invention describes a method for producing a watermark as a security feature for a portable data carrier.
  • Watermarks are known from the prior art, which are used as a security feature for banknotes.
  • a thickness of a paper layer is changed according to a gray value of an image in order to achieve an optical impression of a watermark in the viewer.
  • the problem is that the watermarks known from the banknote sector are not suitable for the production of portable data carriers, e.g. Smart cards, SIM cards, credit cards, health insurance cards, passports with chip, etc. are suitable.
  • the watermarks used in the banknote area are always the same for a series or a production lot. An individualization for each individual banknote is not provided.
  • EP 2 441 593 A1 discloses an achromatic security element for security documents, such as banknotes, smart cards, identity documents, and the like, comprising a thermoplastic or radiation-curable polymer layer, which layer is embossed with diffusely reflecting microstructures on the order of 1 to 100 microns.
  • EP 2172 336 A1 describes layer structures made of thermoplastic layers containing printed watermarks as security features.
  • GB 2 346 111 A discloses security documents, such as banknotes, which are encoded with printed identification features that, while not visible to the human eye, are recognizable by machine read-in to allow for document authorization or counterfeit protection.
  • the object of the present invention is to find a solution which overcomes the disadvantages of the prior art.
  • the invention discloses a method for producing a water mark as a security feature for a portable data carrier with the features of claim 1.
  • An advantageous embodiment is that a brightness value is determined for at least one point of an image in accordance with an adjustable local resolution.
  • an image may have more or fewer pixels. Furthermore, such a degree of detail of the image can be determined.
  • a further advantageous exemplary embodiment is that a layer thickness of the watermark to be printed is determined for at least one brightness value at the location of the associated point of the image.
  • watermark is printed by means of an at least partially opaque material.
  • At least one security feature is introduced into the material for printing the watermark.
  • a security feature all known or suitable security features in question, as they are known for example from banknote printing or ID smart card and passport production, such as fluorescent or luminescent features or microparticles with a label.
  • At least one layer is applied to the printed watermark to produce a planar surface.
  • an at least partially transparent material is used for the at least one layer to produce a planar surface. It is particularly advantageous if this material is more transparent than the material forming the watermark.
  • Another advantageous embodiment is that a clear coat is used for the layer to produce a flat surface.
  • At least one pigment is introduced into the layer to produce a planar surface to prevent scanning of the structure of the watermark.
  • a further advantageous embodiment is that at least one security feature is introduced into the layer to produce a flat surface.
  • a security feature all known or suitable security features come into question, such as e.g. from banknote printing or ID smart card and passport manufacture, e.g. fluorescent features or microparticles with a label.
  • Another advantageous embodiment is that the watermark can only be recognized by means of a technical device.
  • a further advantageous embodiment is that at least one photo of a user and / or at least one coding and / or at least one letter and / or at least one number and / or at least one symbol is / will be used.
  • a data matrix or a bar code or a QR code can be used as coding.
  • any other suitable code may alternatively be used.
  • the watermark is stored in electronic form in a memory of the data carrier.
  • memory there is e.g. a chip or a magnetic stripe of the data carrier.
  • Another advantageous embodiment is that the watermark is printed in a recess of the data carrier.
  • Another advantageous embodiment is that the watermark is printed separately and is subsequently introduced into a recess of the data carrier.
  • Another advantageous embodiment is that the watermark and the data carrier are printed together by means of the three-dimensional printing process.
  • portable data carrier which is produced according to the above method.
  • portable data carriers according to the invention come e.g. a chip card, an ID card with a chip, a credit card or a SIM card in question.
  • the invention discloses a method for producing a watermark 2, 8, 10 as a security feature for a portable data carrier 6.
  • the method is characterized in that the watermark 2, 8, 10 is printed by means of a three-dimensional printing method in the form of a spatial structure.
  • a brightness value is determined for at least one point of an image in accordance with an adjustable local resolution.
  • the respective brightness value is determined for all points of the image.
  • a suitable resolution can be selected for an image. The higher the resolution, the more details you can see.
  • a layer thickness of the watermark 2, 8, 10 to be printed is determined.
  • the layer thickness of the watermark 2, 8, 10 to be printed is determined for each brightness value.
  • the watermark 2, 8,10 is printed by means of an at least partially opaque material, wherein the light transmittance of the material is set such that when the layer thickness is modulated on the order of the thickness of the target substrate, the target substrate corresponding to the watermark to be produced, a very good contrast of the watermark when viewed in transmitted light.
  • At least one security feature is introduced into the material for printing the watermark 2, 8, 10.
  • a security feature any suitable security feature can be used.
  • security features known from banknote printing can be used, e.g. fluorescent elements.
  • At least one layer 4 is applied to the printed watermark 2, 8, 10.
  • an at least partially translucent material is used for the at least one layer 4 to produce a planar surface.
  • a completely translucent material is used for the layer 4 to produce a flat surface.
  • a clear coat is used for the layer 4 to produce a flat surface.
  • at least one pigment is introduced into the layer 4 to produce a planar surface to prevent scanning of the structure of the watermark 2, 8, 10.
  • the watermark 2, 8, 10 can only be recognized in one embodiment by means of a technical device.
  • a technical device may be a sensor or a camera, which may be e.g. capture only light of a certain wavelength.
  • the watermark 2, 8, 10 can also be recognized with naked eyes.
  • At least one photo of a user and / or at least one coding and / or at least one letter and / or at least one image can be used as image a number and / or at least one symbol are used.
  • a data matrix code or a barcode or a QR code may be considered as coding.
  • the watermark 2, 8, 10 is advantageously stored in electronic form in a memory of the data carrier 6.
  • memory e.g. a chip or a magnetic stripe of the data carrier 6 serve.
  • a reader may store the data in memory, e.g. Chip or magnetic stripe, with the recorded on the outside of the disk 6 data watermark 2, 8,10 compare and check whether it is the disk 6 is a forgery.
  • an optional feature introduced into the watermark material can be tested by detecting its physical properties by means of a sensor.
  • the watermark 2, 8,10 either alone or it can be printed directly into a recess of the data carrier 6.
  • the watermarks 2, 8, 10 and the data carrier 6 can also be printed together by means of the three-dimensional printing method, so that a uniform body is produced.
  • FIG. 1 shows by way of example a side view of a structure of a watermark according to the invention 2.
  • the watermark 2 can be prepared for example on a round or square or oval basic shape. For example, in a round basic shape, the watermark is circular when viewed from above.
  • a security feature such as a fluorescent element, as it is used in the banknote area or in the range of ID smart card or passports are introduced.
  • FIG. 2 shows the side view of a structure of a watermark 2 according to the invention, over which a layer 4 has been applied to obtain a flat surface.
  • An application of the layer 4 lends itself, for example, when the watermark 2 is installed in a data carrier body.
  • the watermark 2 or the layer 4 may be formed so that they have a fastening mechanism to produce a mechanical connection to the disk body.
  • a clearcoat can be used, which cures, for example, thermally or by means of UV light after application to the watermark 2.
  • pigments 4 can be present in the layer 4, which prevent scanning of the structure of the watermark 2, for example by means of a laser beam.
  • FIG. 3 shows an embodiment of a portable data carrier 6 with two watermarks 8 and 10 according to the invention.
  • the two watermarks 8 and 10 can be made separately from the data carrier 6 and used after their manufacture in the data carrier 6, for example in a recess of the data carrier 6.
  • the watermarks 8 and / or 10 are eg using an adhesive or a thermal joining method or a mechanical device, such as a clip mechanism on an outside of the watermark 8 and / or 10, permanently connected to the disk 6.
  • a clearcoat can be used, which cures, for example, thermally or by means of UV light after application to the watermark 6, 8.
  • the material of the layer 4 can undergo a chemical / mechanical connection to the data carrier 6.
  • the layer 4 may terminate flush with the disk surface or may be slightly above or below the disk surface.
  • the formed surface of the layer 4 may form a lens shape.
  • a rear side of the recess of the data carrier 6 is translucent and / or has a light source so that the watermark 8 and / or 10 can be made visible. In the case of a light source in the disk 6, the back can be opaque.
  • the data carrier 6 and the watermarks 8 and / or 10 can be produced together by means of the three-dimensional printing process.
  • the watermark 8 is, for example, a portrait photo of a user of the data carrier 6, which is a credit card or ID card, for example.
  • the watermark 10 is, for example, a code, eg a barcode, data matrix code or a QR code.
  • the watermarks 8 and / or 10 can be detected and evaluated in transmitted light by a camera, for example.
  • the code of the watermark 10 may be invisible to the human eye and only by means of a suitable sensor, eg at a certain wavelength, to be read out.

Description

Die vorliegende Erfindung beschreibt ein Verfahren zur Herstellung eines Wasserzeichens als Sicherheitsmerkmal für einen tragbaren Datenträger.The present invention describes a method for producing a watermark as a security feature for a portable data carrier.

Aus dem Stand der Technik sind Wasserzeichen bekannt, welche als Sicherheitsmerkmal für Banknoten eingesetzt werden. Dabei wird eine Dicke einer Papierschicht entsprechend einem Grauwert eines Bildes verändert, um einen optischen Eindruck eines Wasserzeichens beim Betrachter zu erreichen.Watermarks are known from the prior art, which are used as a security feature for banknotes. In this case, a thickness of a paper layer is changed according to a gray value of an image in order to achieve an optical impression of a watermark in the viewer.

Ferner ist aus dem Stand der Technik die Verwendung eines dreidimensionalen Drucks bekannt.Furthermore, the use of a three-dimensional pressure is known from the prior art.

Problematisch ist, dass die aus dem Banknotenbereich bekannten Wasserzeichen sich nicht für die Herstellung von tragbaren Datenträgern, z.B. Chipkarten, SIM-Karten, Kreditkarten, Krankenversicherungskarten, Pässen mit Chip, etc. eignen.The problem is that the watermarks known from the banknote sector are not suitable for the production of portable data carriers, e.g. Smart cards, SIM cards, credit cards, health insurance cards, passports with chip, etc. are suitable.

Ferner sind die im Banknotenbereich verwendeten Wasserzeichen für eine Serie oder ein Produktionslos immer gleich. Eine Individualisierung für jede einzelne Banknote ist nicht vorgesehen.Furthermore, the watermarks used in the banknote area are always the same for a series or a production lot. An individualization for each individual banknote is not provided.

EP 2 441 593 A1 offenbart ein achromatisches Sicherheitselement für Sicherheitsdokumente, wie z.B. Banknoten, Chipkarten, Identitätsdokumente und dergleichen, welches eine thermoplastische oder strahlungshärtbare Polymerschicht umfasst, wobei die Schicht geprägt ist mit diffus reflektierenden Mikrostrukturen in einer Größenordnung von 1 bis 100 Mikrometern. EP 2 441 593 A1 discloses an achromatic security element for security documents, such as banknotes, smart cards, identity documents, and the like, comprising a thermoplastic or radiation-curable polymer layer, which layer is embossed with diffusely reflecting microstructures on the order of 1 to 100 microns.

EP 2172 336 A1 beschreibt Schichtaufbauten aus thermoplastischen Kunststoffschichten, welche gedruckte Wasserzeichen als Sicherheitsmerkmale enthalten. EP 2172 336 A1 describes layer structures made of thermoplastic layers containing printed watermarks as security features.

GB 2 346 111 A offenbart Sicherheitsdokumente, wie z.B. Banknoten, welche mit gedruckten Identifikationsmerkmalen kodiert sind, welche zwar für das menschliche Auge nicht zu erkennen sind, aber durch ein maschinelles Einlesen erkennbar sind, um eine Autorisierung des Dokuments oder einen Fälschungsschutz zu ermöglichen. GB 2 346 111 A discloses security documents, such as banknotes, which are encoded with printed identification features that, while not visible to the human eye, are recognizable by machine read-in to allow for document authorization or counterfeit protection.

Ausgehend von den Nachteilen des Stands der Technik besteht die Aufgabe für die vorliegende Erfindung eine Lösung zu finden, welche die Nachteile des Stands der Technik überwindet.Based on the disadvantages of the prior art, the object of the present invention is to find a solution which overcomes the disadvantages of the prior art.

Die Aufgabe der Erfindung wird durch den unabhängigen Anspruch gelöst. Vorteilhafte Ausführungsbeispiele sind in den Unteransprüchen beschrieben.The object of the invention is achieved by the independent claim. Advantageous embodiments are described in the subclaims.

Zur Lösung der Aufgabe offenbart die Erfindung ein Verfahren zur Herstellung eines Wasserszeichens als Sicherheitsmerkmal für einen tragbaren Datenträger mit den Merkmalen des Anspruchs 1.To solve the problem, the invention discloses a method for producing a water mark as a security feature for a portable data carrier with the features of claim 1.

Ein vorteilhaftes Ausführungsbeispiel ist, dass zumindest für einen Punkt eines Bildes entsprechend einer einstellbaren örtlichen Auflösung ein Helligkeitswert bestimmt wird. Je nach technisch möglicher örtlicher Auflösung des Bildes kann ein Bild mehr oder weniger Pixel aufweisen. Ferner kann so ein Grad an Detailierung des Bildes bestimmt werden.An advantageous embodiment is that a brightness value is determined for at least one point of an image in accordance with an adjustable local resolution. Depending on the technically possible spatial resolution of the image, an image may have more or fewer pixels. Furthermore, such a degree of detail of the image can be determined.

Ein weiteres vorteilhaftes Ausführungsbeispiel ist, dass für zumindest einen Helligkeitswert am Ort des zugehörigen Punktes des Bildes eine zu druckende Schichtdicke des Wasserzeichens bestimmt wird.A further advantageous exemplary embodiment is that a layer thickness of the watermark to be printed is determined for at least one brightness value at the location of the associated point of the image.

Ein weiteres vorteilhaftes Ausführungsbeispiel ist, dass das Wasserzeichen mittels eines zumindest teilweise lichtundurchlässigen Materials gedruckt wird.Another advantageous embodiment is that the watermark is printed by means of an at least partially opaque material.

Ein weiteres vorteilhaftes Ausführungsbeispiel ist, dass in das Material zum Drucken des Wasserzeichens mindestens ein Sicherheitsmerkmal eingebracht wird. Als Sicherheitsmerkmal kommen alle bekannten oder geeigneten Sicherheitsmerkmale in Frage, wie sie z.B. aus dem Banknotendruck oder von der ID-Smart-Card- und Pass-Herstellung bekannt sind, z.B. fluoreszierende oder lumineszierende Merkmale oder Mikropartikel mit einer Beschriftung.Another advantageous embodiment is that at least one security feature is introduced into the material for printing the watermark. As a security feature, all known or suitable security features in question, as they are known for example from banknote printing or ID smart card and passport production, such as fluorescent or luminescent features or microparticles with a label.

Ein weiteres vorteilhaftes Ausführungsbeispiel ist, dass auf das gedruckte Wasserzeichen mindestens eine Schicht aufgetragen wird, um eine ebene Oberfläche zu erzeugen.Another advantageous embodiment is that at least one layer is applied to the printed watermark to produce a planar surface.

Ein weiteres vorteilhaftes Ausführungsbeispiel ist, dass für die mindestens eine Schicht, um eine ebene Oberfläche zu erzeugen, ein zumindest teilweise lichtdurchlässiges Material verwendet wird. Besonders vorteilhaft ist es, wenn dieses Material lichtdurchlässiger ist, als das Wasserzeichen ausbildente Material.Another advantageous embodiment is that for the at least one layer to produce a planar surface, an at least partially transparent material is used. It is particularly advantageous if this material is more transparent than the material forming the watermark.

Ein weiteres vorteilhaftes Ausführungsbeispiel ist, dass für die Schicht, um eine ebene Oberfläche zu erzeugen, ein Klarlack verwendet wird.Another advantageous embodiment is that a clear coat is used for the layer to produce a flat surface.

Ein weiteres vorteilhaftes Ausführungsbeispiel ist, dass in die Schicht, um eine ebene Oberfläche zu erzeugen, mindestens ein Pigment eingebracht wird, um ein Abtasten der Struktur des Wasserzeichens zu verhindern.Another advantageous embodiment is that at least one pigment is introduced into the layer to produce a planar surface to prevent scanning of the structure of the watermark.

Ein weiteres vorteilhaftes Ausführungsbeispiel ist, dass in die Schicht, um eine ebene Oberfläche zu erzeugen, mindestens ein Sicherheitsmerkmal eingebracht wird. Als Sicherheitsmerkmal kommen alle bekannten oder geeigneten Sicherheitsmerkmale in Frage, wie sie z.B. aus dem Banknotendruck oder der ID-Smart-Card- und Pass-Herstellung bekannt sind, z.B. fluoreszierende Merkmale oder Mikropartikel mit einer Beschriftung.A further advantageous embodiment is that at least one security feature is introduced into the layer to produce a flat surface. As a security feature, all known or suitable security features come into question, such as e.g. from banknote printing or ID smart card and passport manufacture, e.g. fluorescent features or microparticles with a label.

Ein weiteres vorteilhaftes Ausführungsbeispiel ist, dass das Wasserzeichen nur mit Hilfe einer technischen Einrichtung zu erkennen ist.Another advantageous embodiment is that the watermark can only be recognized by means of a technical device.

Ein weiteres vorteilhaftes Ausführungsbeispiel ist, dass als Bild mindestens ein Foto eines Benutzers und/ oder mindestens eine Codierung und/ oder mindestens ein Buchstabe und/ oder mindestens eine Zahl und/ oder mindestens ein Symbol verwendet werden/ wird. Als Codierung bietet sich z.B. ein Datamatrix- oder ein Bar- oder ein QR-Code an. Es kann prinzipiell jeder andere geeignete Code alternativ verwendet werden.A further advantageous embodiment is that at least one photo of a user and / or at least one coding and / or at least one letter and / or at least one number and / or at least one symbol is / will be used. For example, a data matrix or a bar code or a QR code can be used as coding. In principle, any other suitable code may alternatively be used.

Ein weiteres vorteilhaftes Ausführungsbeispiel ist, dass das Wasserzeichen in elektronischer Form in einem Speicher des Datenträgers abgespeichert wird. Als Speicher bietet sich z.B. ein Chip oder ein Magnetstreifen des Datenträgers an.Another advantageous embodiment is that the watermark is stored in electronic form in a memory of the data carrier. As memory, there is e.g. a chip or a magnetic stripe of the data carrier.

Ein weiteres vorteilhaftes Ausführungsbeispiel ist, dass das Wasserzeichen in eine Ausnehmung des Datenträgers gedruckt wird.Another advantageous embodiment is that the watermark is printed in a recess of the data carrier.

Ein weiteres vorteilhaftes Ausführungsbeispiel ist, dass das Wasserzeichen separat gedruckt wird und nachträglich in eine Ausnehmung des Datenträgers eingebracht wird.Another advantageous embodiment is that the watermark is printed separately and is subsequently introduced into a recess of the data carrier.

Ein weiteres vorteilhaftes Ausführungsbeispiel ist, dass das Wasserzeichen und der Datenträger mittels des dreidimensionalen Druckverfahrens gemeinsam gedruckt werden.Another advantageous embodiment is that the watermark and the data carrier are printed together by means of the three-dimensional printing process.

Ferner wird die Aufgabe durch einen tragbaren Datenträger gelöst, welcher gemäß dem obigen Verfahren hergestellt wird. Als erfindungsgemäße tragbare Datenträger kommen z.B. eine Chipkarte, ein Personalausweis mit Chip, eine Kreditkarte oder eine SIM-Karte in Frage.Furthermore, the object is achieved by a portable data carrier, which is produced according to the above method. As portable data carriers according to the invention come e.g. a chip card, an ID card with a chip, a credit card or a SIM card in question.

Im Folgenden wird die Erfindung anhand der beigefügten Figuren detailliert beschrieben.

  • Figur 1 zeigt eine Seitenansicht eines Querschnitts durch eine Struktur eines erfindungsgemäßen Wasserzeichens.
  • Figur 2 zeigt die Seitenansicht des Querschnitts durch die Struktur des erfindungsgemäßen Wasserzeichens, über die eine Schicht aufgetragen wurde, um eine ebene Oberfläche zu erhalten.
  • Figur 3 zeigt ein Ausführungsbeispiel eines tragbaren Datenträgers mit zwei erfindungsgemäßen Wasserzeichen.
In the following the invention will be described in detail with reference to the attached figures.
  • FIG. 1 shows a side view of a cross section through a structure of a watermark according to the invention.
  • FIG. 2 shows the side view of the cross section through the structure of the inventive watermark, over which a layer has been applied to obtain a flat surface.
  • FIG. 3 shows an embodiment of a portable data carrier with two watermarks according to the invention.

Bevor die Figuren diskutiert werden, soll kurz auf die wesentlichen Merkmale der Erfindung eingegangen werden.Before discussing the figures, it is intended to briefly discuss the essential features of the invention.

Die Erfindung offenbart ein Verfahren zur Herstellung eines Wasserzeichens 2, 8,10 als Sicherheitsmerkmal für einen tragbaren Datenträger 6. Das Verfahren zeichnet sich dadurch aus, dass das Wasserzeichen 2, 8,10 mittels eines dreidimensionalen Druckverfahrens in Form einer räumlichen Struktur gedruckt wird. Dafür wird zumindest für einen Punkt eines Bildes entsprechend einer einstellbaren örtlichen Auflösung ein Helligkeitswert bestimmt. Vorzugsweise wird für alle Punkte des Bildes der jeweilige Helligkeitswert bestimmt. Je nach Anwendung kann für ein Bild eine geeignete Auflösung gewählt werden. Je höher die Auflösung ist, desto mehr Details des Bildes sind zu erkennen. Dann wird für zumindest einen Helligkeitswert am Ort des zugehörigen Punktes des Bildes eine zu druckende Schichtdicke des Wasserzeichens 2, 8,10 bestimmt. Vorzugsweise wird für jeden Helligkeitswert die zu druckende Schichtdicke des Wasserzeichens 2, 8,10 bestimmt.The invention discloses a method for producing a watermark 2, 8, 10 as a security feature for a portable data carrier 6. The method is characterized in that the watermark 2, 8, 10 is printed by means of a three-dimensional printing method in the form of a spatial structure. For this purpose, a brightness value is determined for at least one point of an image in accordance with an adjustable local resolution. Preferably, the respective brightness value is determined for all points of the image. Depending on the application, a suitable resolution can be selected for an image. The higher the resolution, the more details you can see. Then, for at least one brightness value at the location of the associated point of the image, a layer thickness of the watermark 2, 8, 10 to be printed is determined. Preferably, the layer thickness of the watermark 2, 8, 10 to be printed is determined for each brightness value.

Das Wasserzeichen 2, 8,10 wird mittels eines zumindest teilweise lichtundurchlässigen Materials gedruckt, wobei die Lichtdurchlässigkeit des Materials so eingestellt ist, dass bei einer Modulation der Schichtdicke in der Größenordnung der Dicke des Zielsubstrates, wobei das Zielsubstrat dem herzustellenden Wasserzeichen entspricht, ein sehr guter Kontrast des Wasserzeichens bei Betrachtung im Durchlicht entsteht.The watermark 2, 8,10 is printed by means of an at least partially opaque material, wherein the light transmittance of the material is set such that when the layer thickness is modulated on the order of the thickness of the target substrate, the target substrate corresponding to the watermark to be produced, a very good contrast of the watermark when viewed in transmitted light.

In das Material zum Drucken des Wasserzeichens 2, 8,10 wird mindestens ein Sicherheitsmerkmal eingebracht. Als Sicherheitsmerkmal kann jedes geeignete Sicherheitsmerkmal verwendet werden. Beispielsweise können aus dem Banknotendruck bekannte Sicherheitsmerkmale eingesetzt werden, z.B. fluoreszierende Elemente.At least one security feature is introduced into the material for printing the watermark 2, 8, 10. As a security feature, any suitable security feature can be used. For example, security features known from banknote printing can be used, e.g. fluorescent elements.

Um eine ebene Oberfläche zu erzeugen, wird auf das gedruckte Wasserzeichen 2, 8,10 mindestens eine Schicht 4 aufgetragen. Für die mindestens eine Schicht 4, um eine ebene Oberfläche zu erzeugen, wird ein zumindest teilweise lichtdurchlässiges Material verwendet. Vorzugsweise wird ein vollständig lichtdurchlässiges Material verwendet. Beispielsweise wird für die Schicht 4, um eine ebene Oberfläche zu erzeugen, ein Klarlack verwendet. Vorteilhafterweise wird in die Schicht 4, um eine ebene Oberfläche zu erzeugen, mindestens ein Pigment eingebracht, um ein Abtasten der Struktur des Wasserzeichens 2, 8,10 zu verhindern.To create a flat surface, at least one layer 4 is applied to the printed watermark 2, 8, 10. For the at least one layer 4 to produce a planar surface, an at least partially translucent material is used. Preferably, a completely translucent material is used. For example, for the layer 4 to produce a flat surface, a clear coat is used. Advantageously, at least one pigment is introduced into the layer 4 to produce a planar surface to prevent scanning of the structure of the watermark 2, 8, 10.

Das Wasserzeichen 2, 8,10 ist in einer Ausführungsform nur mit Hilfe einer technischen Einrichtung zu erkennen. Als technische Einrichtung ist beispielsweise ein Sensor oder eine Kamera zu nennen, welche z.B. nur Licht einer bestimmten Wellenlänge erfassen. Alternativ kann das Wasserzeichen 2, 8,10 auch mit blanken Augen erkannt werden.The watermark 2, 8, 10 can only be recognized in one embodiment by means of a technical device. By way of example, a technical device may be a sensor or a camera, which may be e.g. capture only light of a certain wavelength. Alternatively, the watermark 2, 8, 10 can also be recognized with naked eyes.

Als Bild kann z.B. mindestens ein Foto eines Benutzers und/oder mindestens eine Codierung und/oder mindestens ein Buchstabe und/ oder mindestens eine Zahl und/oder mindestens ein Symbol verwendet werden. Als Codierung kommt z.B. ein Datamatrixcode oder eine Barcode oder ein QR-Code in Frage.For example, at least one photo of a user and / or at least one coding and / or at least one letter and / or at least one image can be used as image a number and / or at least one symbol are used. For example, a data matrix code or a barcode or a QR code may be considered as coding.

Das Wasserzeichen 2, 8,10 wird vorteilhafterweise in elektronischer Form in einem Speicher des Datenträgers 6 abgespeichert. Als Speicher kann z.B. ein Chip oder ein Magnetstreifen des Datenträgers 6 dienen. Damit kann der Datenträger 6 gegen ein illegales Kopieren geschützt werden. Ein Lesegerät kann die Daten im Speicher, z.B. Chip oder Magnetstreifen, mit den auf der Außenseite des Datenträgers 6 erfassten Daten des Wasserzeichens 2, 8,10 vergleichen und überprüfen, ob es sich bei dem Datenträger 6 um eine Fälschung handelt. Zusätzlich kann ein optional ins Wasserzeichenmaterial eingebrachtes Sicherheitsmerkmal geprüft werden, indem seine physikalischen Eigenschaften mittels eines Sensors detektiert werden.The watermark 2, 8, 10 is advantageously stored in electronic form in a memory of the data carrier 6. As memory, e.g. a chip or a magnetic stripe of the data carrier 6 serve. Thus, the disk 6 can be protected against illegal copying. A reader may store the data in memory, e.g. Chip or magnetic stripe, with the recorded on the outside of the disk 6 data watermark 2, 8,10 compare and check whether it is the disk 6 is a forgery. In addition, an optional feature introduced into the watermark material can be tested by detecting its physical properties by means of a sensor.

In der Herstellung kann das Wasserzeichen 2, 8,10 entweder alleine hergestellt werden oder es kann direkt in eine Ausnehmung des Datenträgers 6 gedruckt wird. Alternativ können das Wasserzeichen 2, 8,10 und der Datenträger 6 mittels des dreidimensionalen Druckverfahrens auch gemeinsam gedruckt werden, so dass ein einheitlicher Körper entsteht.In the production, the watermark 2, 8,10 either alone or it can be printed directly into a recess of the data carrier 6. Alternatively, the watermarks 2, 8, 10 and the data carrier 6 can also be printed together by means of the three-dimensional printing method, so that a uniform body is produced.

Figur 1 zeigt beispielhaft eine Seitenansicht einer Struktur eines erfindungsgemäßen Wasserzeichens 2. Das Wasserzeichen 2 kann z.B. auf einer runden oder eckigen oder ovalen Grundform hergestellt werden. In einer runden Grundform ist das Wasserzeichen von oben betrachtet beispielsweise kreisförmig. Deutlich zu erkennen sind in Figur 2 die Erhöhungen und Vertiefungen des Wasserzeichens 2, welche den optischen Eindruck bei einem Betrachter bestimmen. In das Material des Wasserzeichens 2 kann ein Sicherheitsmerkmal, z.B. ein fluoreszierendes Element, wie es im Banknotenbereich oder im Bereich von ID-Smart-Card oder Pässen verwendet wird, eingebracht werden. FIG. 1 shows by way of example a side view of a structure of a watermark according to the invention 2. The watermark 2 can be prepared for example on a round or square or oval basic shape. For example, in a round basic shape, the watermark is circular when viewed from above. Clearly visible in FIG. 2 the elevations and depressions of the watermark 2, which determine the visual impression in a viewer. In the material of the watermark 2, a security feature, such as a fluorescent element, as it is used in the banknote area or in the range of ID smart card or passports are introduced.

Figur 2 zeigt die Seitenansicht einer Struktur eines erfindungsgemäßen Wasserzeichens 2, über die eine Schicht 4 aufgetragen wurde, um eine ebene Oberfläche zu erhalten. Ein Aufbringen der Schicht 4 bietet sich z.B. an, wenn das Wasserzeichen 2 in einen Datenträgerkörper eingebaut wird. Zur Befestigung des Wasserzeichens 2 in einem Datenträgerkörper kann das Wasserzeichen 2 oder die Schicht 4 so ausgebildet sein, dass sie einen Befestigungsmechanismus aufweisen, um eine mechanische Verbindung mit dem Datenträgerkörper herzustellen. Für die Schicht 4 kann z.B. ein Klarlack verwendet werden, welcher nach dem Auftragen auf das Wasserzeichen 2 z.B. thermisch oder mittels UV-Licht aushärtet. Ferner können sich in der Schicht 4 Pigmente befinden, welche ein Abtasten der Struktur des Wasserzeichens 2, z.B. mittels eines Laserstrahls, verhindern. FIG. 2 shows the side view of a structure of a watermark 2 according to the invention, over which a layer 4 has been applied to obtain a flat surface. An application of the layer 4 lends itself, for example, when the watermark 2 is installed in a data carrier body. For attaching the watermark 2 in a data carrier body, the watermark 2 or the layer 4 may be formed so that they have a fastening mechanism to produce a mechanical connection to the disk body. For the layer 4, for example, a clearcoat can be used, which cures, for example, thermally or by means of UV light after application to the watermark 2. Furthermore, pigments 4 can be present in the layer 4, which prevent scanning of the structure of the watermark 2, for example by means of a laser beam.

Figur 3 zeigt ein Ausführungsbeispiel eines tragbaren Datenträgers 6 mit zwei erfindungsgemäßen Wasserzeichen 8 und 10. Die zwei Wasserzeichen 8 und 10 können getrennt vom Datenträger 6 hergestellt und nach ihrer Herstellung in den Datenträger 6 eingesetzt werden, z.B. in eine Ausnehmung des Datenträgers 6. Die Wasserzeichen 8 und/oder 10 werden z.B. mittels eines Klebstoffs oder eines thermischen Fügeverfahrens oder einer mechanischen Vorrichtung, z.B. eines Clip-Mechanismus an einer Außenseite der Wasserzeichen 8 und/oder 10, mit dem Datenträger 6 dauerhaft verbunden. Außerdem ist es möglich die Wasserzeichen 8 und/oder 10 in den Datenträger 6 in dessen Ausnehmung dauerhaft einzusetzen und eine Schicht 4, um eine ebene Oberfläche auf dem Wasserzeichen 6, 8 herzustellen, wobei die Schicht 4 in Figur 3 nicht dargestellt ist, nachträglich in die Ausnehmung einzubringen, z.B. durch Dosiervorrichtungen oder Sprühverfahren. Für die Schicht 4 kann z.B. ein Klarlack verwendet werden, welcher nach dem Auftragen auf das Wasserzeichen 6, 8 z.B. thermisch oder mittels UV-Licht aushärtet. Außerdem kann das Material der Schicht 4 eine chemisch/mechanische Verbindung mit dem Datenträger 6 eingehen. Die Schicht 4 kann bündig mit der Datenträgeroberfläche abschließen oder auch geringfügig oberhalb oder unterhalb der Datenträgeroberfläche sich befinden. Außerdem kann die gebildete Oberfläche der Schicht 4 eine Linsenform bilden. Vorteilhafterweise ist eine Rückseite der Ausnehmung des Datenträgers 6 lichtdurchlässig und/ oder weist eine Lichtquelle auf, damit das Wasserzeichen 8 und/oder 10 sichtbar gemacht werden kann. Im Falle einer Lichtquelle im Datenträger 6 kann die Rückseite lichtundurchlässig sein. Alternativ können der Datenträger 6 und die Wasserzeichen 8 und/ oder 10 gemeinsam mittels des dreidimensionalen Druckverfahrens hergestellt werden. Bei dem Wasserzeichen 8 handelt es sich beispielsweise um ein Portraitfoto eines Benutzers des Datenträgers 6, welcher z.B. eine Kreditkarte oder ID Karte ist. Bei dem Wasserzeichen 10 handelt es sich beispielsweise um einen Code, z.B. einen Barcode, Datamatrixcode oder einen QR-Code. Die Wasserzeichen 8 und/oder 10 können z.B. im Durchlicht von einer Kamera erfasst und ausgewertet werden. Alternativ kann z.B. der Code des Wasserzeichens 10 für das menschliche Auge unsichtbar sein und nur mittels eines geeigneten Sensors, z.B. bei einer bestimmten Wellenlänge, ausgelesen werden. FIG. 3 shows an embodiment of a portable data carrier 6 with two watermarks 8 and 10 according to the invention. The two watermarks 8 and 10 can be made separately from the data carrier 6 and used after their manufacture in the data carrier 6, for example in a recess of the data carrier 6. The watermarks 8 and / or 10 are eg using an adhesive or a thermal joining method or a mechanical device, such as a clip mechanism on an outside of the watermark 8 and / or 10, permanently connected to the disk 6. In addition, it is possible to permanently insert the watermarks 8 and / or 10 into the data carrier 6 in its recess and a layer 4 to produce a flat surface on the watermark 6, 8, wherein the layer 4 in FIG FIG. 3 is not shown, subsequently introduce into the recess, for example by metering or spraying. For the layer 4, for example, a clearcoat can be used, which cures, for example, thermally or by means of UV light after application to the watermark 6, 8. In addition, the material of the layer 4 can undergo a chemical / mechanical connection to the data carrier 6. The layer 4 may terminate flush with the disk surface or may be slightly above or below the disk surface. In addition, the formed surface of the layer 4 may form a lens shape. Advantageously, a rear side of the recess of the data carrier 6 is translucent and / or has a light source so that the watermark 8 and / or 10 can be made visible. In the case of a light source in the disk 6, the back can be opaque. Alternatively, the data carrier 6 and the watermarks 8 and / or 10 can be produced together by means of the three-dimensional printing process. The watermark 8 is, for example, a portrait photo of a user of the data carrier 6, which is a credit card or ID card, for example. The watermark 10 is, for example, a code, eg a barcode, data matrix code or a QR code. The watermarks 8 and / or 10 can be detected and evaluated in transmitted light by a camera, for example. Alternatively, for example, the code of the watermark 10 may be invisible to the human eye and only by means of a suitable sensor, eg at a certain wavelength, to be read out.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

22
Struktur eines erfindungsgemäßen WasserzeichensStructure of a watermark according to the invention
44
Schicht, um eine ebene Oberfläche auf dem Wasserzeichen herzustellenLayer to create a flat surface on the watermark
66
tragbarer Datenträger mit zwei erfindungsgemäßen Wasserzeichen 6 und 8portable data carrier with two watermarks 6 and 8 according to the invention
88th
Wasserzeichen in der Form eines Bildes, z.B. eines Portraitfotos des BenutzersWatermarks in the form of an image, e.g. a portrait photo of the user
1010
Wasserzeichen in der Form einer CodierungWatermarks in the form of a code

Claims (10)

  1. A method for producing a watermark (2, 8, 10) as a security feature for a portable data carrier (6),
    wherein the watermark (2, 8, 10) is printed in the form of a spatial structure by means of a three-dimensional printing process,
    characterized in that
    a brightness value is determined for at least one point of an image according to an adjustable spatial resolution,
    wherein a layer thickness to be printed of the watermark (2, 8, 10) is determined for at least one brightness value at the location of the associated point of the image,
    wherein the watermark (2, 8, 10) is printed by means of an at least partially light-impermeable material,
    wherein a light permeability of the material is adjusted such that upon a modulation of the layer thickness in the dimension of the thickness of a target substrate, wherein the target substrate corresponds to the watermark to be manufactured, a contrast of the watermark occurs upon viewing in transmitted light.
  2. The method according to claim 1, characterized in that in the material for printing the watermark (2, 8, 10) at least one security feature is incorporated.
  3. The method according to claim 1 or 2, characterized in that to the printed watermark (2, 8, 10) at least one layer (4) is applied to produce a flat surface.
  4. The method according to claim 3, characterized in that an at least partially light-permeable material is employed for the at least one layer (4) to produce a flat surface.
  5. The method according to claim 4, characterized in that a clear lacquer is employed for the layer (4) to produce a flat surface.
  6. The method according to any of the claims 3 to 5, characterized in that in the layer (4) to produce a flat surface, at least one pigment is incorporated in order to prevent a scanning of the structure of the watermark (2, 8, 10).
  7. The method according to any of the claims 1 to 6, characterized in that at least one photograph of a user and/or at least one coding and/or at least one letter and/or at least one number and/or at least one symbol is/are employed as image.
  8. The method according to any of the claims 1 to 7, characterized in that the watermark (2, 8, 10) is stored in electronic form in a memory of the data carrier (6).
  9. The method according to any of the claims 1 to 8, characterized in that the watermark (2, 8, 10) is printed in a recess of the data carrier (6).
  10. The method according to any of the claims 1 to 9, characterized in that the watermark (2, 8, 10) and the data carrier (6) are printed together by means of the three-dimensional printing method.
EP14003159.2A 2013-10-11 2014-09-12 Method of forming a watermark Active EP2860043B1 (en)

Applications Claiming Priority (2)

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DE102013016959 2013-10-11
DE201310019948 DE102013019948A1 (en) 2013-10-11 2013-11-27 Method of producing a watermark

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EP2860043A1 EP2860043A1 (en) 2015-04-15
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Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE274276C (en) *
DE1283857B (en) * 1964-10-29 1968-11-28 Customark Corp Process for creating chemical watermarks in papers
DE69822932T2 (en) * 1997-07-14 2005-01-27 Ciccone, Nicolás Tadeo Apparatus for producing security stamps for paper or other laminated elements
GB9901523D0 (en) * 1999-01-26 1999-03-17 Bank Of England Printing of security documents
DE102005003839A1 (en) * 2005-01-27 2006-08-03 Koenig & Bauer Ag security marking
DE102007037982A1 (en) * 2007-08-10 2009-02-12 Bundesdruckerei Gmbh Security document with watermarked structure
EP2172336A1 (en) * 2008-09-24 2010-04-07 Bayer MaterialScience AG Forgery-proof security characteristics in confidential or valuable documents
GB0906366D0 (en) * 2009-04-14 2009-05-20 Rue De Int Ltd Security device
EP2441593B1 (en) * 2010-10-13 2020-04-15 Hueck Folien Gesellschaft m.b.H. Security element with achromatic features

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