EP0863815A1 - Data carrier with optically variable colour - Google Patents

Data carrier with optically variable colour

Info

Publication number
EP0863815A1
EP0863815A1 EP96939931A EP96939931A EP0863815A1 EP 0863815 A1 EP0863815 A1 EP 0863815A1 EP 96939931 A EP96939931 A EP 96939931A EP 96939931 A EP96939931 A EP 96939931A EP 0863815 A1 EP0863815 A1 EP 0863815A1
Authority
EP
European Patent Office
Prior art keywords
optically variable
data carrier
information
carrier according
color
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.)
Granted
Application number
EP96939931A
Other languages
German (de)
French (fr)
Other versions
EP0863815B1 (en
Inventor
Eckhard Braun
Reinhard Plaschka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and Devrient GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP0863815A1 publication Critical patent/EP0863815A1/en
Application granted granted Critical
Publication of EP0863815B1 publication Critical patent/EP0863815B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/23—Identity cards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/337—Guilloche patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material

Definitions

  • the invention relates to a data carrier, in particular a security, an identification card or the like, which is provided with an optically variable security element which has optically variable pigments without or with only a weak body color.
  • EP 0435 029 A3 also discloses the use of liquid-crystalline polymers as optically variable elements, in which a color shift effect occurs when the viewing or illumination angle changes. This effect is based essentially on the helical structure of the liquid-crystalline phase, which is fixed in polymers by crosslinking and, moreover, via external conditions, such as, for. B. the mechanical pretreatment, can be adjusted. This means that the color of the color change can also be specifically adjusted.
  • the object of the invention is to propose a data carrier and a method for its production which have a new optical effect and thus an increased protection against counterfeiting.
  • the invention is based on the basic idea that the document first with information contrasting to the data carrier, such as. B. is provided with a finely structured print. This information is then provided with an optically variable effect, a translucent layer having an optically variable effect being applied at least over a portion of the information.
  • translucent, optically variable layers can be used which have optically variable pigments with no or only a small body color.
  • other translucent optically variable layers can be used, such as. B. interference layer structures or optically variable films such as liquid crystalline silicone polymer films.
  • the layer having an optically variable effect can be applied in the context of the invention by coating, transfer printing, other application, application of a film or printing.
  • the invention is described using the example of printing, however the other techniques mentioned above can also be used analogously to apply the optically variable layer.
  • the method according to the invention makes it possible to provide this information with an optically variable effect.
  • the information is at least partially provided with a translucent, optically variable layer, which has, for example, an optically variable pigment without or with only a small body color.
  • the lack of their own body color in the optically variable pigments makes these pigments particularly effective in those places where the first printing ink is on the data carrier as a structured background.
  • the optically variable effect is not or only barely visible at those places where there is no background pressure.
  • the width or fineness of the structures which can be produced is limited and is considerably higher than the line thicknesses which can be achieved with conventional pigments, since the optically variable pigments are essential in comparison with the conventional pigments are larger and therefore information as a high-resolution structure cannot be produced by directly printing on the pigments.
  • the optically variable pigments can no longer be printed from a certain mesh size of the screen, so that the generation of a high-resolution structure using this technique is impossible.
  • the advantage of the invention is therefore that the document is provided with a high-resolution fine structure, which moreover has a previously unknown optically variable effect for the viewer.
  • the procedure according to the invention offers the further advantage that the formation of the fine structure and the formation of the optically variable effect are decoupled from one another, so that the pigments optimized for the particular application can be used for the desired effect.
  • FIG 9 shows an embodiment of the optically variable security element according to the invention.
  • FIG. 1 shows a data carrier 1 according to the invention, in the present case a bank note, with a security element 2 attached to it.
  • This security element 2 is positioned at a suitable location on the data carrier, so that its optical effect on the one hand makes it easy to check the data carrier and on the other hand to prevent counterfeiting and leads here in particular with color copiers.
  • the optically variable element 2 shows an enlarged detail of the data carrier 1 according to the invention in the region of the optically variable element.
  • the optically variable element 2 consists of an imprint of lines 3 in a color that contrasts with the data carrier. For example, this can be a fine, high-resolution line pattern.
  • the substance with the optically variable pigments is applied in an area 4 via these lines 3.
  • Inks that are optically variable are particularly suitable Contain pigments and be printed on the surface. Outside the printing lines 3, the optically variable pigments in the area 4 cannot be recognized, or can only be recognized with extreme weakness, because of the lack of one's own body color.
  • the effect of the optically variable pigments comes into its own on lines 3, so that an optically variable effect is superimposed on the high-resolution print pattern, which effect can only be clearly seen in the areas of the print pattern.
  • the lines 3 of the structure can be adapted to the respective requirements.
  • dark colors in particular allow the overlying flat print 4 of the optically variable pigments to be particularly effective.
  • the high-resolution structure 3 can vary in color and / or in the respective color tones.
  • the lines 3 in their entirety, as shown in FIG. 3, with a printing ink which contains optically variable pigments.
  • This makes it possible to transfer the total information content of the image, logo, sign or the like generated by the structuring of the first imprint to the optical effectiveness of the optically variable pigments above it.
  • the structure of the first printing ink eg. B. as a halftone image
  • the iridescent effect of the optically variable pigments printed on is determined by the color and / or intensity value of the high-resolution structure underneath.
  • the data carrier 1 can also be designed in such a way that a high-resolution line structure that is present on the data carrier is used to generate the optically variable element.
  • High-resolution print lines 5, which are designed, for example, as guilloches or high-resolution lines of an image motif, can be overprinted with the optically variable color pigments at least in a partial area.
  • the area 4 represented by the overprint can be designed as a geometric shape or as a character, so that the background pressure lines 5 in the area of the overprint 4 produce an optically variable overprint with a tilting effect.
  • FIG. 5 shows a data carrier 1 which has an optically variable security element 2.
  • the again printed, possibly high-resolution structure 3 is covered in the area 4 by optically variable pigments by a printing ink applied over a large area.
  • a further piece of information 6 is introduced within the area 4, which in the present case is represented by the letter “A”.
  • This information can be generated in the surface 4, for example by embossing or printing. When embossing, both the conventional gravure printing processes with and without color come into consideration.
  • embossing both the conventional gravure printing processes with and without color come into consideration.
  • the printing color of the print 6 can, however, also be selected from the group of transparent or translucent colors, so that the optically variable background 4 is retained in the area of the information 6, but is modified in comparison with its immediate surroundings.
  • FIG. 6 shows a further example of the data carrier 1 according to the invention, on which an optically variable element 2 is applied.
  • the again existing lines 3 of the first printing ink, which can be printed in one or more colors, are covered by several individual areas 7, 8, 9 and 10.
  • the individual areas 7 to 10 are produced by printing on a color containing an optically variable pigment, the pigments in turn being recognizable in the areas in which the high-resolution structure 3 runs beneath them.
  • the individual areas 7 to 10 can contain different optically variable pigments and thus each produce a different impression on the viewer.
  • the optically variable areas 7 to 10 already carry an information content which, in the simplest case, consists of a specific color sequence. This information content is then influenced or only made visible by the structure of the first print, which is under the optically variable colors.
  • the optically variable element according to the invention can also be combined with the back of the document, so that a complete information appears in the review.
  • the optically variable element 2 is applied to a data carrier 1, with a structured imprint in one first being in turn on the data carrier first, any desired printing ink is applied.
  • This is printed in area 4, which in the present case is letter C, with the optically variable color.
  • elements 11, 12, 13 are introduced by embossing or printing in such a way that they can be seen in the reflected light.
  • the back of the document is printed or embossed in the area of the optically variable element 2 so that two elements 14 and 15 can be seen in transmitted light, which together with elements 11, 12 and 13 when viewed in transmitted light there is additional overall information.
  • the security element according to the invention can be combined with a combination of an embossed structure known per se from CA 1 019 012 with an embossed line pattern to form an overall element which has completely new properties.
  • the optically variable element 2 applied to the data carrier 1 consists of several components. First lines 16 of a first high-resolution structure are printed. In the area of this printed structure, other lines 17, a second high-resolution structure, are then printed, which differ from the first one in their color, shape or the direction of the printed lines.
  • the second applied high-resolution structure 17 forms a first part of information introduced into the optically variable element, in the following case the lower part of the number "10".
  • Another surface area of the optically variable element is now known from those known per se from CA 1 019 012
  • a combination of an embossing and a line pattern is formed, with lines being printed which can be recognized differently in the area 18 due to an additional embossing when viewed at different viewing angles.
  • the non-embossed area 19 is covered over the entire area with a substance, in particular a printing ink, which in turn has an optically variable pigment without or with only weak own body color. Lines 16 and 17 of the optically variable element thus have a viewing angle-dependent color impression.
  • the part 18 of the optically variable element contains the partial information which is complementary to the imprint 17 and which is applied in register-correct manner and, because of the embossing and the line pattern, is only clearly visible under certain viewing angles.
  • the partial information 17 is thus visible from all viewing angles, but a different color effect is generated depending on the viewing angle.
  • Part 18 of the optically variable security element contains the supplementary partial information, which, however, is only clearly visible when the data carrier is tilted.
  • FIG. 9 shows a further example of a data carrier according to the invention.
  • a high-resolution portrait consisting of fine lines 20 is first printed on a data carrier 1 using the steel gravure printing method.
  • the identical image in coarser resolution ie for example in wider lines 21 is completely or partially superimposed on this steel intaglio portrait, optically variable colors being used for the second image, so that the high-resolution steel engraving in this way an optically variable effect is assigned.
  • the technology described last offers the possibility of using less optically variable To assign all colors to the steel engraving portrait an optically variable impression.
  • the embodiments based on the basic idea of the invention lead to a large number of specific design options. These in turn can also be combined with one another or with other already known optical security elements for data carriers.
  • a suitable printing ink can be applied to produce the first structured imprint.
  • etching techniques are available, but other methods, such as the laser ablation method, can also be used.
  • the generation of the structure with the aid of a laser can also be regarded as printing in this context.
  • the print can be high-resolution, single-color or multi-color and each with different color tones.
  • the structure is generated as a line pattern, dot pattern, halftone image or the like.
  • the brilliance of the optically variable effect can be increased further by smoothing the background before or after the application of the optically variable colors.
  • the high-resolution fine structure can also be applied as a so-called “negative structure”, in which a fine line structure is produced by means of a cut-out from an otherwise full-surface print, in addition to the straight lines also others such as guilloches or Microprint images of alphanumeric characters can be generated, which are then overprinted with the optically variable colors.
  • optically variable colors can be used, which contain one, several and / or also different optically variable pigments, such as liquid crystalline silicone polymers or iridescent pigments.
  • the color with which the structure is produced can also be matched to the color of the optically variable pigments applied to it, so that at certain viewing angles the color of the optically variable element and the color of the background are the same.
  • the optically variable substance or color, which is applied overlapping in a region of the structure contains optically variable pigments which have little or no body color of their own, such as in particular interference layer pigments or pigments produced on the basis of liquid-crystalline polymers. They can be printed on the respective structures produced by the first printing ink in such a way that they cover the entire surface, even overlap them or only cover a part of the structure in certain shapes, characters or patterns.
  • the method according to the invention is not restricted to the fact that the optically variable element is generated directly on the data carrier. Rather, it is also possible to produce the optically variable element on a separate carrier and then to transfer the element to the data carrier using one of the known transfer methods.
  • the optically variable element can also be implemented as a printed, optically variable film, in particular provided with a fine line print.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Methods (AREA)
  • Credit Cards Or The Like (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Semiconductor Memories (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

A data carrier with an optically variable element. The optically variable element includes a first structured print which is overlaid with a second print, at least in partial areas. The second print is applied to a document with an ink which contains an optically variable pigment having little or no body color of its own.

Description

Datenträger mit optisch variabler Farbe Data carrier with optically variable color
Die Erfindung betrifft einen Datenträger, insbesondere ein Wertpapier, eine Ausweiskarte oder dergleichen, der mit einem optisch variablen Sicherheits- element versehen ist, das optisch variable Pigmente ohne oder mit nur schwacher eigener Körperfarbe aufweist.The invention relates to a data carrier, in particular a security, an identification card or the like, which is provided with an optically variable security element which has optically variable pigments without or with only a weak body color.
Zur Kennzeichnung von Datenträgern sowie zum Schutz vor Verfälschung oder Fälschung wurden in der letzten Zeit vielfältige Anstrengungen unter- nommen. Insbesondere führte die zunehmende Qualität von Fotokopierge¬ räten dazu, daß mehr und mehr optisch variable Elemente auf Sicherheits¬ dokumente aufgebracht wurden, deren optisch variabler Effekt von Kopier¬ geräten nicht reproduzierbar ist.Various efforts have recently been made to label data carriers and to protect them from falsification or counterfeiting. In particular, the increasing quality of photocopy machines has resulted in more and more optically variable elements being applied to security documents, the optically variable effect of which cannot be reproduced by copying machines.
So ist aus der EP 0 317 514 AI bekannt, auf ein Dokument eine Schicht mit irisierenden Stoffen aufzutragen, die bei unterschiedlichen Betrachtungs¬ winkeln einen unterschiedlichen Farbeindruck vermittelt. Insbesondere wird hierbei vorgeschlagen, die irisierende Substanz flächig auf eine darunterlie¬ gende, schwarze, vollflächige Schicht aufzutragen. Der so erzeugten schil- lernden Fläche kann in einem weiteren Arbeitsschritt durch Überdrucken dieser Fläche eine Information überlagert werden.It is known from EP 0 317 514 A1 to apply a layer with iridescent substances to a document, which gives a different color impression at different viewing angles. In particular, it is proposed here to apply the iridescent substance over a large area to an underlying black, full-area layer. Information can be superimposed on the shimmering surface created in this way in a further work step by overprinting this surface.
Aus der EP 0435 029 A3 ist darüber hinaus auch bereits die Verwendung von flüssigkristallinen Polymeren als optisch variable Elemente bekannt, bei denen sich ein Farbkippeffekt mit der Änderung des Betrachtungs- oder Be¬ leuchtungswinkels einstellt. Dieser Effekt beruht im wesentlichen auf der helikalen Struktur der flüssigkristallinen Phase, die in Polymeren durch Ver¬ netzen fixiert und darüber hinaus über äußere Bedingungen, wie z. B. die mechanische Vorbehandlung, eingestellt werden kann. Damit kann auch der Farbton des Farbwechsels gezielt eingestellt werden.EP 0435 029 A3 also discloses the use of liquid-crystalline polymers as optically variable elements, in which a color shift effect occurs when the viewing or illumination angle changes. This effect is based essentially on the helical structure of the liquid-crystalline phase, which is fixed in polymers by crosslinking and, moreover, via external conditions, such as, for. B. the mechanical pretreatment, can be adjusted. This means that the color of the color change can also be specifically adjusted.
Die Aufgabe der Erfindung besteht darin, einen Datenträger sowie ein Ver- fahren zu seiner Herstellung vorzuschlagen, der einen neuen optischen Ef¬ fekt und somit einen erhöhten Fälschungsschutz aufweist.The object of the invention is to propose a data carrier and a method for its production which have a new optical effect and thus an increased protection against counterfeiting.
Diese Aufgabe wird durch die Merkmale der kennzeichnenden Teile der un¬ abhängigen Ansprüche gelöst.This object is achieved by the features of the characterizing parts of the independent claims.
Weiterbildungen sind in den untergeordneten Ansprüchen genannt.Developments are mentioned in the subordinate claims.
Die Erfindung beruht auf dem Grundgedanken, daß das Dokument zunächst mit einer zum Datenträger kontrastierenden Information, wie z. B. einem fein strukturierten Aufdruck versehen wird. Anschließend wird diese Infor¬ mation mit einem optisch variablen Effekt versehen, wobei zumindest über einen Teilbereich der Information eine lichtdurchlässige, einen optisch va¬ riablen Effekt aufweisende Schicht aufgebracht wird. Insbesondere können dabei lichtdurchlässige optisch variable Schichten verwendet werden, die optisch variable Pigmente mit keiner oder nur einer geringen eigenen Kör¬ perfarbe aufweisen. Darüber hinaus sind auch andere lichtdurchlässige op¬ tisch variable Schichten verwendbar, wie z. B. Interferenzschichtaufbauten oder optisch variable Folien wie flüssigkristaliine Silikonpolymerfolien.The invention is based on the basic idea that the document first with information contrasting to the data carrier, such as. B. is provided with a finely structured print. This information is then provided with an optically variable effect, a translucent layer having an optically variable effect being applied at least over a portion of the information. In particular, translucent, optically variable layers can be used which have optically variable pigments with no or only a small body color. In addition, other translucent optically variable layers can be used, such as. B. interference layer structures or optically variable films such as liquid crystalline silicone polymer films.
Die einen optisch variablen Effekt aufweisende Schicht kann im Rahmen der Erfindung durch Beschichtung, Transferdruck, anderweitiges Auftragen, Aufbringen einer Folie oder Aufdrucken aufgebracht werden. Exemplarisch wird die Erfindung zwar am Beispiel des Aufdruckens beschrieben, jedoch können analog auch die oben genannten anderen Techniken zum Aufbrin¬ gen der optisch variablen Schicht eingesetzt werden.The layer having an optically variable effect can be applied in the context of the invention by coating, transfer printing, other application, application of a film or printing. By way of example, the invention is described using the example of printing, however the other techniques mentioned above can also be used analogously to apply the optically variable layer.
Werden mit herkömmlichen Farbpigmenten strukturierte Druckbilder auf einen Datenträger aufgedruckt, besteht mit dem erfindungsgemäßen Verfah¬ ren die Möglichkeit, diese Information mit einem optisch variablen Effekt zu versehen. Hierzu wird die Information zumindest in Teilbereichen flächig mit einer lichtdurchlässigen, optisch variablen Schicht versehen, welche z.B. ein optisch variables Pigment ohne oder mit nur geringer eigener Körperfar- be aufweist. Das Fehlen der eigenen Körperfarbe bei den optisch variablen Pigmenten läßt diese Pigmente besonders an jenen Stellen deutlich zur Wir¬ kung kommen, an denen die erste Druckfarbe auf dem Datenträger als struk¬ turierter Untergrund liegt. Im Gegensatz hierzu ist der optisch variable Ef¬ fekt an den Stellen nicht oder nur kaum sichtbar, an denen kein Untergrund- druck vorhanden ist. Bei der Verwendung der obengenannten optisch va¬ riablen Pigmente in Druckfarben ist die Breite bzw. die Feinheit der herstell¬ baren Strukturen beschränkt und liegt erheblich über den mit gängigen Pig¬ menten erzielbaren Linienstärken, da die optisch variablen Pigmente im Vergleich zu den herkömmlichen Pigmenten wesentlich größer sind und somit eine Information als hochauflösende Struktur durch das unmittelbare Aufdrucken der Pigmente nicht herstellbar ist. Darüber hinaus sind die op¬ tisch variablen Pigmente wegen ihrer Größe im Siebdruck ab einer bestimm¬ ten Maschenweite des Siebes nicht mehr verdruckbar, so daß die Erzeugung einer hochauflösenden Struktur mit Hilfe dieser Technik ohnehin ausschei- det. Es ist daher als besonderer Vorteil des erfindungsgemäßen Verfahrens anzusehen, daß mit dieser Technik nun auch hochauflösende Strukturen mit einem optisch variablen Effekt versehen werden können, wenn die hochauflösenden Strukturen mit der ersten Druckfarbe aufgedruckt und an- schließend mit der das optisch variable Pigment enthaltenden Druckfarbe belegt werden.If structured printing images are printed onto a data carrier using conventional color pigments, the method according to the invention makes it possible to provide this information with an optically variable effect. For this purpose, the information is at least partially provided with a translucent, optically variable layer, which has, for example, an optically variable pigment without or with only a small body color. The lack of their own body color in the optically variable pigments makes these pigments particularly effective in those places where the first printing ink is on the data carrier as a structured background. In contrast to this, the optically variable effect is not or only barely visible at those places where there is no background pressure. When the above-mentioned optically variable pigments are used in printing inks, the width or fineness of the structures which can be produced is limited and is considerably higher than the line thicknesses which can be achieved with conventional pigments, since the optically variable pigments are essential in comparison with the conventional pigments are larger and therefore information as a high-resolution structure cannot be produced by directly printing on the pigments. In addition, because of their size in screen printing, the optically variable pigments can no longer be printed from a certain mesh size of the screen, so that the generation of a high-resolution structure using this technique is impossible. It is therefore to be regarded as a particular advantage of the method according to the invention that high-resolution structures can now also be provided with an optically variable effect using this technology if the high-resolution structures are printed on and applied with the first printing ink. finally with the printing ink containing the optically variable pigment.
Mit der Erfindung kann demnach der Vorteil erzielt werden, daß das Do- kument mit einer hochauflösenden Feinstruktur versehen wird, die zudem einen bislang nicht gekannten optisch variablen Effekt für den Betrachter aufweist. Die erfindungsgemäße Vorgehensweise bietet den weiteren Vor¬ teil, daß die Bildung der Feinstruktur und die Bildung des optisch variablen Effektes voneinander entkoppelt sind, so daß für den jeweils gewünschten Effekt die auf den Anwendungsfall hin optimierten Pigmente verwendet werden können.The advantage of the invention is therefore that the document is provided with a high-resolution fine structure, which moreover has a previously unknown optically variable effect for the viewer. The procedure according to the invention offers the further advantage that the formation of the fine structure and the formation of the optically variable effect are decoupled from one another, so that the pigments optimized for the particular application can be used for the desired effect.
Weitere Vorteile und Weiterbildungen ergeben sich aus den untergeordne¬ ten Ansprüchen sowie den nachfolgenden Figuren, bei deren Darstellung zugunsten der Anschaulichkeit auf eine maßstabsgetreue Wiedergabe ver¬ zichtet wurde.Further advantages and further developments result from the subordinate claims and the following figures, the representation of which has been dispensed with in scale for the sake of clarity.
Es zeigen im einzelnen:The individual shows:
Fig. 1 einen erfindungsgmäßen Datenträger,1 shows a data carrier according to the invention,
Fig. 2 ein erfindungsgemäßes optisch variables Sicherheitselement,2 an optically variable security element according to the invention,
Fig. 3 eine weitere Ausführungsform des erfindungsgemäßen optisch variablen Sicherheitselementes,3 shows a further embodiment of the optically variable security element according to the invention,
Fig. 4 eine Ausführungsform des erfindungsgemäßen optisch variablen Sicherheitselementes, 0 -4 shows an embodiment of the optically variable security element according to the invention, 0 -
Fig. 5 eine Ausführungsform des erfind ungs gemäßen optisch variablen Sicherheitselementes,5 shows an embodiment of the optically variable security element according to the invention,
Fig. 6 eine Ausführungsform des erfindungsgemäßen optisch variablen Sicherheitselementes,6 shows an embodiment of the optically variable security element according to the invention,
Fig. 7 eine Ausführungsform des erfindungsgemäßen optisch variablen Sicherheitselementes,7 shows an embodiment of the optically variable security element according to the invention,
Fig. 8 ein erfindungsgemäßes optisch variables Sicherheitselement in Durchsicht,8 shows an optically variable security element according to the invention in a view,
Fig. 9 eine Ausführungsform des erfindungsgemäßen optisch variablen Sicherheitselementes.9 shows an embodiment of the optically variable security element according to the invention.
Fig. 1 zeigt einen erfindungsgemäßen Datenträger 1, im vorliegenden Fall eine Banknote, mit einem darauf aufgebrachten Sicherheitselement 2. Dieses Sicherheitselement 2 wird an einer geeigneten Stelle auf dem Datenträger positioniert, so daß dessen optische Wirkung einerseits zur leichten Prüfbar- keit des Datenträgers und andererseits zur Verhinderung von Fälschungs¬ versuchen und hier insbesondere mit Farbkopiergeräten führt.1 shows a data carrier 1 according to the invention, in the present case a bank note, with a security element 2 attached to it. This security element 2 is positioned at a suitable location on the data carrier, so that its optical effect on the one hand makes it easy to check the data carrier and on the other hand to prevent counterfeiting and leads here in particular with color copiers.
In Fig. 2 ist eine Ausschnittsvergrößerung des erfindungsgemäßen Datenträ¬ gers 1 im Bereich des optisch variablen Elementes zu sehen. Das optisch va- riable Element 2 besteht aus einem Aufdruck von Linien 3 in einer zum Da¬ tenträger kontrastierenden Farbe. Dabei kann es sich beispielsweise um ein feines, hochauflösendes Linienmuster handeln. Über diese Linien 3 wird in einem Bereich 4 die Substanz mit den optisch variablen Pigmenten auf¬ gebracht. Dabei eignen sich insbesondere Druckfarben, die optisch variable Pigmente enthalten und flächig aufgedruckt werden. Außerhalb der Druck- linien 3 sind die optisch variablen Pigmente im Bereich 4 wegen des Fehlens der eigenen Körperfarbe nicht oder nur äußerst schwach erkennbar. Auf den Linien 3 hingegen kommt die Wirkung der optisch variablen Pigmente voll zur Geltung, so daß dem hochauflösenden Druckmuster ein optisch va¬ riabler Effekt überlagert wird, der ausschließlich in den Bereichen des Druckmusters deutlich zu erkennen ist. Für die Auswahl der Farben, mit denen die Linien 3 auf den Datenträger aufgedruckt wird, besteht lediglich die Einschränkung, daß diese Farben zur Erzeugung der Struktur geeignet sein müssen, was wesentlich von der gewünschten Linienfeinheit abhängt. Hinsichtlich der Farbgebung können die Linien 3 der Struktur den jeweiligen Erfordernissen angepaßt werden. Es hat sich jedoch gezeigt, daß insbesonde¬ re dunkle Farben den darüberliegenden flächigen Aufdruck 4 der optisch variablen Pigmente besonders gut zur Geltung kommen lassen. Darüber hinaus kann die hochauflösende Struktur 3 in der Farbe und/ oder in den jeweiligen Farbtönen variieren. Dies führt zu einer jeweils unterschiedlichen Wirkung der darüberliegenden optisch variablen Pigmente im Bereich 4. Auf diese Weise lassen sich Effekte erzeugen, wie beispielsweise eine bestimmte Farbtönung, wie sie etwa bei einem Halbtonbild vorliegt, und in die dar- überliegende Schicht, die optisch variable Pigmente enthält, übertragen.2 shows an enlarged detail of the data carrier 1 according to the invention in the region of the optically variable element. The optically variable element 2 consists of an imprint of lines 3 in a color that contrasts with the data carrier. For example, this can be a fine, high-resolution line pattern. The substance with the optically variable pigments is applied in an area 4 via these lines 3. Inks that are optically variable are particularly suitable Contain pigments and be printed on the surface. Outside the printing lines 3, the optically variable pigments in the area 4 cannot be recognized, or can only be recognized with extreme weakness, because of the lack of one's own body color. On the other hand, the effect of the optically variable pigments comes into its own on lines 3, so that an optically variable effect is superimposed on the high-resolution print pattern, which effect can only be clearly seen in the areas of the print pattern. For the selection of the colors with which the lines 3 are printed on the data carrier, there is only the restriction that these colors must be suitable for producing the structure, which essentially depends on the desired line fineness. With regard to the coloring, the lines 3 of the structure can be adapted to the respective requirements. However, it has been shown that dark colors in particular allow the overlying flat print 4 of the optically variable pigments to be particularly effective. In addition, the high-resolution structure 3 can vary in color and / or in the respective color tones. This leads to a different effect of the overlying optically variable pigments in area 4. In this way, effects can be generated, such as a specific color tint, such as is present in a halftone image, and in the overlying layer, the optically variable pigments contains, transferred.
In derartig gelagerten Fällen ist es günstig, die Linien 3, wie in Fig. 3 gezeigt, in ihrer Gesamtheit mit einer Druckfarbe zu Überdrucken, die optisch varia¬ ble Pigmente enthält. Dadurch wird es möglich, den Gesamtinforma- tionsgehalt des durch die Strukturierung des ersten Aufdrucks erzeugten Bildes, Logos, Zeichens oder ähnlichem auf die optische Wirksamkeit der darüberliegenden optisch variablen Pigmente zu übertragen. Bei entspre¬ chender Ausgestaltung der Struktur der ersten Druckfarbe, z. B. als Halb¬ tonbild, ist es somit möglich, die Grauwertbildinformation des Halbton- bildes durch den flächigen Überdruck mit Farbpigmenten ohne oder nur mit geringer eigener Körperfarbe in eine Bildinformation unterschiedlich irisie¬ render Bildwerte umzuwandeln. Die irisierende Wirkung der aufgedruckten optisch variablen Pigmente ist durch den jeweils darunterliegenden Farb- und/ oder Intensitätswert der hochauflösenden Struktur bestimmt.In such cases, it is expedient to overprint the lines 3 in their entirety, as shown in FIG. 3, with a printing ink which contains optically variable pigments. This makes it possible to transfer the total information content of the image, logo, sign or the like generated by the structuring of the first imprint to the optical effectiveness of the optically variable pigments above it. If the structure of the first printing ink, eg. B. as a halftone image, it is thus possible to display the gray value image information of the halftone to convert the image through the two-dimensional overprinting with color pigments without or only with a small amount of body color into image information of different iridescent image values. The iridescent effect of the optically variable pigments printed on is determined by the color and / or intensity value of the high-resolution structure underneath.
Ein zusätzlicher Fälschungsschutz ergibt sich, wenn der erste Aufdruck 3 eine hochauflösende Struktur darstellt. Wie der Fig. 4 zu entnehmen ist, kann der erfindungsgemäße Datenträger 1 auch so ausgestaltet sein, daß ei- ne auf dem Datenträger ohnehin vorhandene hochauflösende Linienstruktur zur Erzeugung des optisch variablen Elementes genutzt wird. Dabei können hochauflösende Drucklinien 5, die beispielsweise als Guillochen oder hoch¬ auflösende Linien eines Bildmotives ausgeführt sind, wenigstens in einem Teilbereich mit den optisch variablen Farbpigmenten überdruckt werden. Die durch den Überdruck dargestellte Fläche 4 kann als geometrische Form oder auch als Zeichen ausgeführt sein, so daß die Untergrunddrucklinien 5 im Bereich des Überdruckes 4 einen optisch variablen Aufdruck mit Kippef¬ fekt erzeugen.Additional protection against counterfeiting is obtained if the first imprint 3 represents a high-resolution structure. As can be seen from FIG. 4, the data carrier 1 according to the invention can also be designed in such a way that a high-resolution line structure that is present on the data carrier is used to generate the optically variable element. High-resolution print lines 5, which are designed, for example, as guilloches or high-resolution lines of an image motif, can be overprinted with the optically variable color pigments at least in a partial area. The area 4 represented by the overprint can be designed as a geometric shape or as a character, so that the background pressure lines 5 in the area of the overprint 4 produce an optically variable overprint with a tilting effect.
In Fig. 5 ist ein Datenträger 1 dargestellt, der ein optisch variables Sicherheit¬ selement 2 aufweist. Die wiederum aufgedruckte, gegebenenfalls hochauflö¬ sende Struktur 3 wird im Bereich 4 durch eine flächig aufgebrachte Druck¬ farbe mit optisch variablen Pigmenten bedeckt. Innerhalb des Bereiches 4 ist eine weitere Information 6 eingebracht, die im vorliegenden Fall durch den Buchstaben "A" repräsentiert wird. Diese Information kann in der Fläche 4 beispielsweise durch Prägen oder Aufdrucken erzeugt werden. Beim Prägen kommen sowohl die gängigen Stahltiefdruckverfahren mit und ohne Farbe in Betracht. Beim Aufdrucken der Information besteht die Möglichkeit, die Information klar vor einem schillernden Hintergrund dadurch herzu-stellen, daß die Druckfarbe so ausgewählt wird, daß sie den optisch variablen Un¬ tergrund vollständig abdeckt. Die Druckfarbe des Aufdrucks 6 kann aber auch aus der Gruppe der transparenten oder transluzenten Farben ausge¬ wählt werden, so daß der optisch variable Hintergrund 4 auch im Bereich der Information 6 erhalten bleibt, jedoch im Vergleich zu seiner unmittel¬ baren Umgebung modifiziert ist.5 shows a data carrier 1 which has an optically variable security element 2. The again printed, possibly high-resolution structure 3 is covered in the area 4 by optically variable pigments by a printing ink applied over a large area. A further piece of information 6 is introduced within the area 4, which in the present case is represented by the letter “A”. This information can be generated in the surface 4, for example by embossing or printing. When embossing, both the conventional gravure printing processes with and without color come into consideration. When printing the information, it is possible to make the information clear against a dazzling background by that the printing ink is selected so that it completely covers the optically variable background. The printing color of the print 6 can, however, also be selected from the group of transparent or translucent colors, so that the optically variable background 4 is retained in the area of the information 6, but is modified in comparison with its immediate surroundings.
In Fig. 6 ist ein weiteres Beispiel für den erfindungsgemäßen Datenträger 1 gezeigt, auf den ein optisch variables Element 2 aufgebracht ist. Dabei wer- den die wiederum vorhandenen Linien 3 der ersten Druckfarbe, die ein- oder mehrfarbig aufgedruckt sein können, von mehreren Einzelbereichen 7, 8, 9 und 10 abgedeckt. Die Einzelbereiche 7 bis 10 werden durch den Auf¬ druck einer ein optisch variables Pigment enthaltenden Farbe erzeugt, wobei die Pigmente wiederum in den Bereichen zu erkennen sind, in denen unter ihnen die beispielsweise hochauflösende Struktur 3 verläuft. Die einzelnen Bereiche 7 bis 10 können bei dieser Ausführungsform unterschiedliche op¬ tisch variable Pigmente enthalten und somit einen jeweils unterschiedlichen Eindruck beim Betrachter erzeugen. Auf diese Weise ist es möglich, daß die optisch variablen Bereiche 7 bis 10 an sich schon einen Informationsgehalt tragen, der im einfachsten Fall in einer bestimmten Farbfolge besteht. Dieser Informationsgehalt wird dann durch die jeweils unter den optisch variablen Farben liegende Struktur des ersten Aufdrucks beeinflußt bzw. erst sichtbar gemacht.6 shows a further example of the data carrier 1 according to the invention, on which an optically variable element 2 is applied. The again existing lines 3 of the first printing ink, which can be printed in one or more colors, are covered by several individual areas 7, 8, 9 and 10. The individual areas 7 to 10 are produced by printing on a color containing an optically variable pigment, the pigments in turn being recognizable in the areas in which the high-resolution structure 3 runs beneath them. In this embodiment, the individual areas 7 to 10 can contain different optically variable pigments and thus each produce a different impression on the viewer. In this way it is possible that the optically variable areas 7 to 10 already carry an information content which, in the simplest case, consists of a specific color sequence. This information content is then influenced or only made visible by the structure of the first print, which is under the optically variable colors.
Das erfindungsgemäße optisch variable Element kann, wie in Fig. 7 gezeigt, auch mit der Rückseite des Dokumentes kombiniert werden, so daß in der Durchsicht eine sich komplettierende Information erscheint. Hierzu wird auf einen Datenträger 1 das optisch variable Element 2 aufgebracht, wobei auf dem Datenträger wiederum zunächst ein strukturierter Aufdruck in einer ersten, an sich beliebigen Druckfarbe aufgebracht wird. Diese wird im Be¬ reich 4, der im vorliegenden Fall als Buchstabe "C" ausgeführt ist, flächig mit der optisch variablen Farbe bedruckt. Innerhalb dieses Bereiches 4 sind Ele¬ mente 11, 12, 13 durch Prägen oder Drucken so eingebracht, daß sie im Auf- licht erkennbar sind. Die Rückseite des Dokumentes ist im Bereich des op¬ tisch variablen Elementes 2 passergenau so bedruckt oder geprägt, daß im Durchlicht darüber hinaus zwei Elemente 14 und 15 erkennbar sind, die bei Betrachtung des Dokumentes im Durchlicht zusammen mit den Elementen 11, 12 und 13 eine sich ergänzende Gesamtinformation ergeben.As shown in FIG. 7, the optically variable element according to the invention can also be combined with the back of the document, so that a complete information appears in the review. For this purpose, the optically variable element 2 is applied to a data carrier 1, with a structured imprint in one first being in turn on the data carrier first, any desired printing ink is applied. This is printed in area 4, which in the present case is letter C, with the optically variable color. Within this area 4, elements 11, 12, 13 are introduced by embossing or printing in such a way that they can be seen in the reflected light. The back of the document is printed or embossed in the area of the optically variable element 2 so that two elements 14 and 15 can be seen in transmitted light, which together with elements 11, 12 and 13 when viewed in transmitted light there is additional overall information.
Die besondere Eigenschaft der betrachtungswinkelabhängigen, optisch va¬ riablen Farbüberdrucke kann auch in Kombination mit weiteren Sicherheits¬ elementen vorteilhaft genutzt werden. Beispielsweise kann das erfindungs¬ gemäße Sicherheitselement mit einem an sich aus der CA 1 019 012 bekann- ten Kombination einer Prägestruktur mit einem aufgeprägten Linienmuster zu einem Gesamtelement verbunden werden, welches völlig neue Eigen¬ schaften aufweist.The special property of the viewing angle-dependent, optically variable color overprints can also be used advantageously in combination with other security elements. For example, the security element according to the invention can be combined with a combination of an embossed structure known per se from CA 1 019 012 with an embossed line pattern to form an overall element which has completely new properties.
In Fig. 8 ist hierzu ein bevorzugtes Ausführungsbeispiel gezeigt. Das auf den Datenträger 1 aufgebrachte optisch variable Element 2 besteht dabei aus mehreren Komponenten. Zunächst werden Linien 16 einer ersten hochauflö¬ senden Struktur aufgedruckt. Im Bereich dieser aufgedruckten Struktur werden anschließend andere Linien 17, einer zweiten hochauflösenden Struktur aufgedruckt, die sich von der ersten in ihrer Farbe, Form oder der Richtung der aufgedruckten Linien unterscheiden. Die zweite aufgebrachte hochauflösende Struktur 17, bildet dabei einen ersten Teil einer in das op¬ tisch variable Element eingebrachten Information, im folgenden Fall den un¬ teren Teil der Zahl "10". Ein weiterer Flächenbereich des optisch variablen Elementes wird nun durch die an sich aus der CA 1 019 012 bekannten Kombination einer Prägung und eines Linienmusters gebildet, wobei Linien aufgedruckt werden, die wegen einer zusätzlich aufgebrachten Prägung bei Betrachtung unter verschiedenen Betrachtungswinkeln im Bereich 18 unter¬ schiedlich erkennbar sind. Der nicht geprägte Bereich 19 wird ganzflächig mit einer Substanz, insbesondere einer Druckfarbe, bedeckt, die wiederum ein optisch variables Pigment ohne oder mit nur schwacher eigener Körper¬ farbe aufweist. Die Linien 16 und 17 des optisch variablen Elementes weisen somit einen betrachtungswinkelabhängigen Farbeindruck auf. Der Teil 18 des optisch variablen Elementes enthält die zum Aufdruck 17 ergänzende Teilinformation, die passergenau aufgebracht wird und wegen der Prägung und des Linienmusters lediglich unter bestimmten Betrachtungswinkeln eindeutig sichtbar ist. Somit ist die Teilinformation 17 unter allen Betrach¬ tungswinkeln sichtbar, jedoch wird abhängig vom Betrachtungswinkel je¬ weils ein anderer Farbeffekt erzeugt. Der Teil 18 des optisch variablen Si- cherheitselementes enthält die ergänzende Teilinformation, die allerdings nur beim Kippen des Datenträgers eindeutig sichtbar wird.A preferred exemplary embodiment is shown in FIG. 8. The optically variable element 2 applied to the data carrier 1 consists of several components. First lines 16 of a first high-resolution structure are printed. In the area of this printed structure, other lines 17, a second high-resolution structure, are then printed, which differ from the first one in their color, shape or the direction of the printed lines. The second applied high-resolution structure 17 forms a first part of information introduced into the optically variable element, in the following case the lower part of the number "10". Another surface area of the optically variable element is now known from those known per se from CA 1 019 012 A combination of an embossing and a line pattern is formed, with lines being printed which can be recognized differently in the area 18 due to an additional embossing when viewed at different viewing angles. The non-embossed area 19 is covered over the entire area with a substance, in particular a printing ink, which in turn has an optically variable pigment without or with only weak own body color. Lines 16 and 17 of the optically variable element thus have a viewing angle-dependent color impression. The part 18 of the optically variable element contains the partial information which is complementary to the imprint 17 and which is applied in register-correct manner and, because of the embossing and the line pattern, is only clearly visible under certain viewing angles. The partial information 17 is thus visible from all viewing angles, but a different color effect is generated depending on the viewing angle. Part 18 of the optically variable security element contains the supplementary partial information, which, however, is only clearly visible when the data carrier is tilted.
In Fig. 9 ist ein weiteres Beispiel eines erfindungsgemäßen Datenträgers ge¬ zeigt. Dabei wird auf einen Datenträger 1 zunächst im Stahltiefdruckverfah- ren ein hoch aufgelöstes, aus feinen Linien 20 bestehendes Portrait aufge¬ druckt. Zur Erzeugung des erfindungsgemäßen Effektes wird diesem Stahl- tiefdruckportrait das identische Bild in gröberer Auflösung, d.h. beispiels¬ weise in breiteren Linien 21, ganz oder teilweise überlagert, wobei für das zweite Bild optisch variable Farben verwendet werden, so daß dem hochaufgelöstem Stahlstich auf diese Weise ein optisch variabler Effekt zu¬ geordnet wird. Neben den flächigen Überdrucken des hochaufgelösten Stahlstiches mit optisch variablen Farben besteht durch die zuletzt beschrie¬ bene Technik die Möglichkeit, bei Verwendung von weniger optisch varia- blen Farben dem Stahlstichportrait dennoch einen optisch variablen Ein¬ druck zuzuordnen.9 shows a further example of a data carrier according to the invention. In this case, a high-resolution portrait consisting of fine lines 20 is first printed on a data carrier 1 using the steel gravure printing method. To produce the effect according to the invention, the identical image in coarser resolution, ie for example in wider lines 21, is completely or partially superimposed on this steel intaglio portrait, optically variable colors being used for the second image, so that the high-resolution steel engraving in this way an optically variable effect is assigned. In addition to the surface overprinting of the high-resolution steel engraving with optically variable colors, the technology described last offers the possibility of using less optically variable To assign all colors to the steel engraving portrait an optically variable impression.
Die vorangegangenen Beispiele zeigen, daß die auf dem Grundgedanken der Erfindung beruhenden Ausführungsformen zu einer Vielzahl von konkreten Ausgestaltungsmöglichkeiten führen. Diese wiederum können auch unter¬ einander oder mit anderen bereits bekannten optischen Sicherheitselementen für Datenträger kombiniert werden. Zur Erzeugung des ersten strukturierten Aufdrucks kann eine geeignete Druckfarbe aufgebracht werden. Es besteht darüber hinaus auch die Möglichkeit, eine Struktur dadurch zu erzeugen, daß aus einem flächigen Aufdruck bestimmte Teilbereiche wieder entfernt werden. Hierbei stehen zum einen Ätztechniken zur Verfügung, jedoch kön¬ nen auch andere Verfahren, wie beispielsweise das Laserablationsverfahren, genutzt werden. Auch das Erzeugen der Struktur mit Hilfe eines Lasers kann in diesem Zusammenhang als Aufdrucken angesehen werden. Bei allen vor¬ angegangenen Ausführungsbeispielen kann der Aufdruck hochauflösend, ein- oder mehrfarbig und jeweils mit unterschiedlichen Farbtönen ausge¬ führt sein. In besonders vorteilhaften Ausführungsformen wird die Struktur als Linienmuster, Punktmuster, Halbtonbild oder ähnliches erzeugt.The preceding examples show that the embodiments based on the basic idea of the invention lead to a large number of specific design options. These in turn can also be combined with one another or with other already known optical security elements for data carriers. A suitable printing ink can be applied to produce the first structured imprint. There is also the possibility of creating a structure by removing certain partial areas from a flat imprint. On the one hand, etching techniques are available, but other methods, such as the laser ablation method, can also be used. The generation of the structure with the aid of a laser can also be regarded as printing in this context. In all of the above exemplary embodiments, the print can be high-resolution, single-color or multi-color and each with different color tones. In particularly advantageous embodiments, the structure is generated as a line pattern, dot pattern, halftone image or the like.
Bei den oben angeführten Ausführungsbeispielen hat sich weiterhin gezeigt, daß die Brillanz des optisch variablen Effektes dadurch weiter erhöht wer¬ den kann, daß vor oder nach dem Aufbringen der optisch variablen Farben der Untergrund geglättet wird.In the case of the exemplary embodiments mentioned above, it has also been shown that the brilliance of the optically variable effect can be increased further by smoothing the background before or after the application of the optically variable colors.
Die hochauflösende Feinstruktur kann auch als sogenannte „Negativ¬ struktur" aufgebracht werden, bei der aus einem ansonsten vollflächigen Aufdruck eine feine Linienstruktur durch Aussparung erzeugt wird, wobei neben den geraden Linien auch andere, wie beispielsweise Guillochen oder Mikrodruckbilder alphanumerischer Zeichen, erzeugt werden können, die anschließend flächig mit den optisch variablen Farben überdruckt werden. Beim Überdrucken der feinen Linienstruktur können optisch variable Farben verwendet werden, die eines, mehrere und/ oder auch verschiedene optisch variable Pigmente, wie beispielsweise flüssigkristaliine Silikonpolymere oder irisierende Pigmente enthalten. Selbstverständlich ist es daneben auch mög¬ lich, die Farbe, die die optisch variablen Pigmente enthält, und/ oder die Farbe des Feinstrukturuntergrundes mit lumineszierenden, magnetischen, leitfähigen oder anderen Merkmalspigmenten zu versehen.The high-resolution fine structure can also be applied as a so-called “negative structure”, in which a fine line structure is produced by means of a cut-out from an otherwise full-surface print, in addition to the straight lines also others such as guilloches or Microprint images of alphanumeric characters can be generated, which are then overprinted with the optically variable colors. When overprinting the fine line structure, optically variable colors can be used, which contain one, several and / or also different optically variable pigments, such as liquid crystalline silicone polymers or iridescent pigments. In addition, it is of course also possible to provide the color which contains the optically variable pigments and / or the color of the fine structure substrate with luminescent, magnetic, conductive or other feature pigments.
Zur Erzielung besonderer Effekte kann die Farbe, mit der die Struktur er¬ zeugt wird, auch auf die darauf aufgebrachte Farbe der optisch variablen Pigmente abgestimmt werden, so daß bei bestimmten Betrachtungswinkeln die Farbe des optisch variablen Elementes und die Farbe des Untergrundes gleich sind. Die optisch variable Substanz oder Farbe, die in einem Bereich der Struktur überlappend aufgebracht wird, enthält optisch variable Pig¬ mente, die keine oder nur eine geringe eigene Körperfarbe aufweisen, wie insbesondere Interferenzschichtpigmente oder auf der Basis von flüssigkri¬ stallinen Polymeren hergestellte Pigmente. Sie können auf die jeweiligen durch die erste Druckfarbe erzeugten Strukturen so aufgedruckt werden, daß sie diese vollflächig bedecken, sie sogar überlappen oder jeweils nur ei¬ nen Teil der Struktur in bestimmten Formen, Zeichen oder Mustern ab¬ decken.To achieve special effects, the color with which the structure is produced can also be matched to the color of the optically variable pigments applied to it, so that at certain viewing angles the color of the optically variable element and the color of the background are the same. The optically variable substance or color, which is applied overlapping in a region of the structure, contains optically variable pigments which have little or no body color of their own, such as in particular interference layer pigments or pigments produced on the basis of liquid-crystalline polymers. They can be printed on the respective structures produced by the first printing ink in such a way that they cover the entire surface, even overlap them or only cover a part of the structure in certain shapes, characters or patterns.
Darüber hinaus ist das erfindungsgemäße Verfahren nicht darauf be¬ schränkt, daß das optisch variable Element unmittelbar auf dem Datenträger erzeugt wird. Vielmehr ist es auch möglich, das optisch variable Element auf einem separaten Träger herzustellen und das Element anschließend mit Hilfe eines der bekannten Transferverfahren auf den Datenträger zu übertragen. Das optisch variable Element kann dabei auch als bedruckte, insbesondere mit einem feinen Liniendruck versehene, optisch variable Folie verwirklicht sein. In addition, the method according to the invention is not restricted to the fact that the optically variable element is generated directly on the data carrier. Rather, it is also possible to produce the optically variable element on a separate carrier and then to transfer the element to the data carrier using one of the known transfer methods. The optically variable element can also be implemented as a printed, optically variable film, in particular provided with a fine line print.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Datenträger, insbesondere Wertpapier, Ausweiskarte oder dergleichen, der mit einem optisch variablen Sicherheitselement versehen ist, dadurch gekennzeichnet, daß das Sicherheitselement wenigstens eine Information und eine optisch variable Schicht aufweist, wobei die Information in einer zum Datenträger kontrastierenden Farbe dargestellt ist, und die optisch va¬ riable Schicht lichtdurchlässig ist und zumindest in Teilbereichen über der Information angeordnet ist.1. Data carrier, in particular security, ID card or the like, which is provided with an optically variable security element, characterized in that the security element has at least one piece of information and an optically variable layer, the information being shown in a color contrasting with the data carrier, and the optically variable layer is translucent and is arranged at least in partial areas above the information.
2. Datenträger nach Anspruch 1, dadurch gekennzeichnet, daß die Infor¬ mation eine hochauflösende Struktur aufweist.2. Data carrier according to claim 1, characterized in that the information has a high-resolution structure.
3. Datenträger nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Information eine oder mehrere Aussparungen aufweist.3. Data carrier according to claim 1 or 2, characterized in that the information has one or more recesses.
4. Datenträger nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Information eine einheitliche Farbe und einen einheitlichen Farbton aufweist.4. Data carrier according to one of claims 1 to 3, characterized in that the information has a uniform color and a uniform color.
5. Datentiäger nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Information unterschiedliche Farben und/ oder Farbtöne aufweist.5. Data carrier according to one of claims 1 to 4, characterized in that the information has different colors and / or shades.
6. Datentiäger nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Information dunkel, insbesondere schwarz, ist.6. Data carrier according to one of claims 1 to 5, characterized in that the information is dark, in particular black.
7. Datenträger nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die optisch variable Schicht optisch variable Pigmente, Interferenz- schichtpigmente oder auf der Basis von flüssigkristallinen Polymeren herge¬ stellte Pigmente aufweist.7. Data carrier according to one of claims 1 to 6, characterized in that the optically variable layer of optically variable pigments, interference has layered pigments or pigments produced on the basis of liquid-crystalline polymers.
8. Datenträger nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, daß die Information ein Portrait, ein Bildmotiv, ein Logo, ein Zeichen oder ein Text ist.8. Data carrier according to one of claims 2 to 7, characterized in that the information is a portrait, an image motif, a logo, a character or a text.
9. Datenträger nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die optisch variable Schicht flächig in einer geometrischen Form oder in Form eines Zeichens aufgebracht ist.9. Data carrier according to one of claims 1 to 8, characterized in that the optically variable layer is applied flat in a geometric shape or in the form of a character.
10. Datentiäger nach Anspruch 9, dadurch gekennzeichnet, daß die optisch variable Schicht mit einem Aufdruck überdruckt ist, der eine Information, insbesondere ein Zeichen, Bild oder Logo darstellt.10. Data carrier according to claim 9, characterized in that the optically variable layer is overprinted with an imprint which represents information, in particular a character, image or logo.
11. Datenträger nach Anspruch 9, dadurch gekennzeichnet, daß mehrere optisch variable Schichten, die jeweils ein anderes optisch variables Pigment enthalten können, unmittelbar auf der Information aufgebracht sind.11. Data carrier according to claim 9, characterized in that a plurality of optically variable layers, each of which can contain a different optically variable pigment, are applied directly to the information.
12. Datenträger nach einem der Ansprüche 1 bis 11, dadurch gekennzeich¬ net, daß das optisch variable Element mit einem Aufdruck auf der dem op¬ tisch variablen Element gegenüberliegenden Seite des Datenträgers so kom¬ biniert ist, daß in der Durchsicht im Bereich des optisch variablen Elementes eine Gesamtinformation erkennbar wird.12. Data carrier according to one of claims 1 to 11, characterized gekennzeich¬ net that the optically variable element with a print on the opposite of the optically variable element of the data carrier is combined in such a way that in the view in the area of the optically variable element, total information becomes recognizable.
13. Datenträger nach einem der Ansprüche 1 bis 12, dadurch gekennzeich¬ net, daß die Information und/ oder die optisch variable Schicht aufgedruckt ist. 13. Data carrier according to one of claims 1 to 12, characterized gekennzeich¬ net that the information and / or the optically variable layer is printed.
14. Verfahren zur Herstellung einesDatenträgers, insbesondere eines Wert¬ papiers, einer Ausweiskarte oder dergleichen, der mit einem optisch varia¬ blen Sicherheitselement versehen ist, dadurch gekennzeichnet, daß auf den Datenträger zunächst eine Information in einer zum Datenträger kontrastie- renden Farbe aufgebracht wird und dann eine lichtdurchlässige, optisch va¬ riable Schicht so auf den Datenträger aufgebracht wird, daß sie die Informa¬ tion zumindest teilweise überlappt.14. A method for producing a data carrier, in particular a security, an identification card or the like, which is provided with an optically variable security element, characterized in that information is first applied to the data carrier in a color that contrasts with the data carrier and then a translucent, optically variable layer is applied to the data carrier in such a way that it at least partially overlaps the information.
15. Verfahren zur Herstellung eines Datenträgers nach Anspruch 14, da- durch gekennzeichnet, daß die Information in Form einer hochauflösenden15. A method for producing a data carrier according to claim 14, characterized in that the information in the form of a high-resolution
Struktur aufgebracht wird.Structure is applied.
16. Verfahren zur Herstellung eines Datenträgers nach Anspruch 14 oder 15, dadurch gekennzeichnet, daß die Information durch teilweises Abtragen eines Aufdruckes oder Farbauftrages erzeugt wird.16. A method for producing a data carrier according to claim 14 or 15, characterized in that the information is generated by partially removing an imprint or color order.
17. Verfahren zur Herstellung eines Datenträgers gemäß Anspruch 16, da¬ durch gekennzeichnet, daß das Abtragen durch Ätzen, mit mechanischen Mitteln oder mit Hilfe eines Lasers erfolgt.17. A method for producing a data carrier according to claim 16, characterized in that the removal is carried out by etching, with mechanical means or with the aid of a laser.
18. Verfahren zur Herstellung eines Datenträgers, insbesondere eines Wert¬ papiers, einer Ausweiskarte oder dergleichen, der mit einem optisch varia¬ blen Sicherheitselement versehen ist, dadurch gekennzeichnet, daß auf ei¬ nem separaten Element zunächst eine Information in einer zum Datenträger kontrastierenden Farbe aufgebracht wird und dann die Information von ei¬ ner lichtdurchlässigen, optisch variablen Schicht wenigstens teilweise über¬ lappend belegt wird, wobei dieses separate Element mit Hilfe eines Trans¬ ferverfahrens auf den Datenträger übertragen wird. 18. A method for producing a data carrier, in particular a security, an identification card or the like, which is provided with an optically variable security element, characterized in that information is first applied to a separate element in a color contrasting with the data carrier and then the information is at least partially overlapped by a translucent, optically variable layer, this separate element being transferred to the data carrier with the aid of a transfer method.
19. Optisch variables Sicherheitselement, das eine optisch variable Schicht und wenigstens eine Information aufweist, dadurch gekennzeichnet, daß die Information in einer zum Datenträger kontrastierenden Farbe dargestellt ist und die optisch variable Schicht lichtdurchlässig ist und zumindest in Teilbereichen über der Information angeordnet ist.19. Optically variable security element, which has an optically variable layer and at least one piece of information, characterized in that the information is shown in a color contrasting with the data carrier and the optically variable layer is translucent and is arranged at least in partial areas above the information.
20. Optisch variables Sicherheitselement gemäß Anspruch 19, dadurch ge¬ kennzeichnet, daß das optisch variable Sicherheitselement auf einem Trans¬ ferband angeordnet ist. 20. Optically variable security element according to claim 19, characterized in that the optically variable security element is arranged on a transfer belt.
EP96939931A 1995-11-27 1996-11-26 Data carrier with optically variable colour Expired - Lifetime EP0863815B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19544130A DE19544130A1 (en) 1995-11-27 1995-11-27 Data carrier with optically variable color
DE19544130 1995-11-27
PCT/EP1996/005229 WO1997019818A1 (en) 1995-11-27 1996-11-26 Data carrier with optically variable colour

Publications (2)

Publication Number Publication Date
EP0863815A1 true EP0863815A1 (en) 1998-09-16
EP0863815B1 EP0863815B1 (en) 2000-06-07

Family

ID=7778500

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96939931A Expired - Lifetime EP0863815B1 (en) 1995-11-27 1996-11-26 Data carrier with optically variable colour

Country Status (11)

Country Link
US (1) US6183018B1 (en)
EP (1) EP0863815B1 (en)
AT (1) ATE193681T1 (en)
AU (1) AU2623397A (en)
DE (2) DE19544130A1 (en)
DK (1) DK0863815T3 (en)
ES (1) ES2146916T3 (en)
GR (1) GR3034285T3 (en)
PT (1) PT863815E (en)
RU (1) RU2176190C2 (en)
WO (1) WO1997019818A1 (en)

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Also Published As

Publication number Publication date
WO1997019818A1 (en) 1997-06-05
AU2623397A (en) 1997-06-19
RU2176190C2 (en) 2001-11-27
EP0863815B1 (en) 2000-06-07
DK0863815T3 (en) 2000-11-20
DE59605412D1 (en) 2000-07-13
PT863815E (en) 2000-11-30
DE19544130A1 (en) 1997-05-28
US6183018B1 (en) 2001-02-06
ATE193681T1 (en) 2000-06-15
ES2146916T3 (en) 2000-08-16
GR3034285T3 (en) 2000-12-29

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