EP3862190A1 - Security element with printing inks that become transparent when exposed to electromagnetic radiation in the infrared wavelength range - Google Patents
Security element with printing inks that become transparent when exposed to electromagnetic radiation in the infrared wavelength range Download PDFInfo
- Publication number
- EP3862190A1 EP3862190A1 EP21000030.3A EP21000030A EP3862190A1 EP 3862190 A1 EP3862190 A1 EP 3862190A1 EP 21000030 A EP21000030 A EP 21000030A EP 3862190 A1 EP3862190 A1 EP 3862190A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- security element
- substrate
- printing ink
- electromagnetic radiation
- wavelength range
- 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
Links
- 238000007639 printing Methods 0.000 title claims abstract description 127
- 239000000976 ink Substances 0.000 title claims abstract description 113
- 230000005670 electromagnetic radiation Effects 0.000 title claims abstract description 58
- 239000000758 substrate Substances 0.000 claims abstract description 69
- 229910052709 silver Inorganic materials 0.000 claims abstract description 11
- 239000004332 silver Substances 0.000 claims abstract description 11
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000005855 radiation Effects 0.000 claims description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 4
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 4
- 238000007646 gravure printing Methods 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 238000007641 inkjet printing Methods 0.000 claims description 2
- 238000007645 offset printing Methods 0.000 claims description 2
- 239000002985 plastic film Substances 0.000 claims description 2
- 229920006255 plastic film Polymers 0.000 claims description 2
- -1 polyethylene terephthalate Polymers 0.000 claims description 2
- 238000007650 screen-printing Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000001465 metallisation Methods 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 239000000020 Nitrocellulose Substances 0.000 description 2
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
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- 239000003086 colorant Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
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- 229920002799 BoPET Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
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- 239000000975 dye Substances 0.000 description 1
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- 239000004922 lacquer Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- AJDUTMFFZHIJEM-UHFFFAOYSA-N n-(9,10-dioxoanthracen-1-yl)-4-[4-[[4-[4-[(9,10-dioxoanthracen-1-yl)carbamoyl]phenyl]phenyl]diazenyl]phenyl]benzamide Chemical compound O=C1C2=CC=CC=C2C(=O)C2=C1C=CC=C2NC(=O)C(C=C1)=CC=C1C(C=C1)=CC=C1N=NC(C=C1)=CC=C1C(C=C1)=CC=C1C(=O)NC1=CC=CC2=C1C(=O)C1=CC=CC=C1C2=O AJDUTMFFZHIJEM-UHFFFAOYSA-N 0.000 description 1
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Images
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
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/378—Special inks
- B42D25/382—Special inks absorbing or reflecting infrared light
-
- 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
Definitions
- the invention relates to a security element for a document of value, for example for a bank note or a passport, the security element having a substrate with a front side and a rear side, with a viewer viewing the substrate of the security element from the front side, that is, in plan view.
- Security threads for passport papers are produced in the prior art as so-called country code threads with a flag and a negative or positive text in gravure printing, UV offset or digital printing on a plastic substrate.
- these security threads can be equipped with fluorescence. The same printing color with the same properties is used for the text (negative or positive text).
- security films are known which are applied to the surface of the substrate of a bank note.
- security films extend from the upper edge to the lower edge of the banknotes and cover a hole in the banknotes.
- nominations of € 50 and more have a security film in the form of a single element, a so-called film patch.
- Out DE 102008049595 A1 is a printing ink with at least one boride that absorbs electromagnetic radiation in the infrared wavelength range known that absorbs radiation in the wavelength range from 800 nm to 2500 nm. This IR absorbing printing ink appears invisible to the naked eye under daylight and is visible under IR light.
- security threads with optical properties such as, for example, holograms or liquid crystal colors, metallizations with or without color-shifting effects and / or cambering-tilting effects, as well as security threads with magnetic properties.
- the invention is therefore based on the object of developing a generic security element in such a way that the disadvantages of the prior art are eliminated and the protection against counterfeiting is further increased.
- a first printing ink is arranged on the substrate of the security element, which is translucent or preferably transparent in the infrared wavelength range of electromagnetic radiation and is opaque in the visible wavelength range of electromagnetic radiation and has a dark or black shade per se.
- a second printing ink is arranged, which is also translucent or preferably transparent in the infrared wavelength range of electromagnetic radiation and is translucent in the visible wavelength range of electromagnetic radiation and has a white or whitish-silver hue.
- the first and second printing inks are in at least one Overlap area arranged one above the other, so that overall a silver hue results for the viewer in the at least one overlap area in the visible wavelength range of electromagnetic radiation.
- the first printing ink is thus located in the overlapping area behind the second printing ink in the viewing direction and results from the interaction of the two printing inks for the viewer in the visible wavelength range of electromagnetic radiation or visually an overall silver hue in the overlapping area.
- the formulation that the first or second printing ink "per se” has a dark or black or white color tone means, within the meaning of this invention, that the respective printing ink taken by itself, that is, without interaction with another printing ink, this color tone having. If only the first or second printing ink were arranged on the substrate, the first or second printing ink would have this color tone.
- two printing inks transparent to IR radiation are combined with one another, the first printing ink being opaque and the second printing ink translucent in the visually visible wavelength range, and the second printing ink with the white shade being applied over the dark or black first printing ink in the viewing direction.
- the combination of the two printing inks gives the viewer an overall silver hue in the overlapping area.
- the first printing ink can be arranged on the front side of the substrate of the security element and the second color can be arranged above the first printing ink.
- both printing inks are arranged on the front side of the substrate of the security element.
- the substrate of the security element is translucent or preferably transparent at least in partial areas of the visible and infrared wavelength range of electromagnetic radiation, the first printing ink being arranged on the back of the substrate of the security element and the second color being arranged on the front side of the substrate of the security element is.
- the first printing ink is visible and recognizable from the front side of the substrate through the translucent or preferably transparent substrate.
- the substrate of the security element is translucent or preferably transparent, at least in partial areas of the visible and infrared wavelength range of electromagnetic radiation, the first printing ink being arranged on the back of the substrate of the security element and the second color between the first color and the substrate of the security element is arranged.
- the first and the second printing inks are visible and recognizable from the front side of the substrate through the translucent or preferably transparent substrate.
- the first printing ink is particularly preferably applied with an application rate of approximately 1 g / m 2 to approximately 3 g / m 2 and the second printing ink with an application rate of approximately 2 g / m 2 to approximately 8 g / m 2 .
- the rule here is that the greater the amount applied and thus the layer thickness of the second printing ink that is selected, the brighter the security element appears in the visually visible wavelength range. Conversely, the lower the amount applied and thus the layer thickness of the second printing ink that is selected, the darker the security element appears in the visually visible wavelength range. With an order quantity of the second printing color of about 2 g / m 2 , the security element thus appears darker than with an application quantity of the second printing ink of about 8 g / m 2 .
- the first printing ink is, for example, the printing ink EP-92988 IR black from the Swiss company ROTOFLEX. It has the following properties: good hiding power with a sufficiently thick layer in the visible range (VIS), transparent in the IR range for wavelengths from 800 nm to 1000 nm, very good adhesion and good lamination adhesion, suitable for frontal and reverse printing, suitable for external printing Together with a waterproof protective varnish, low residual solvents, the main binders are cellulose nitrate and polyurethane, does not contain any chlorine-containing binders such as PVC or PVdC.
- VIS visible range
- the main binders are cellulose nitrate and polyurethane, does not contain any chlorine-containing binders such as PVC or PVdC.
- this printing ink appears in top view, ie when illuminated from the front and viewed from the front, inherently dark to black and in transparency, ie when illuminated from the rear and viewed from the front, dark green in itself and with a larger order quantity black.
- the second printing color is, for example, the printing ink EP-92088 IR lacquer from the Swiss company ROTOFLEX. It has the following properties: Silver gloss effect with a high layer thickness thanks to special pigments, permeable in the IR range for wavelengths from 800 nm to 1000 nm, very good adhesion and good lamination adhesion, suitable for front and back printing, suitable for external printing together with a waterproof protective varnish, low residual solvents, the main binders are cellulose nitrate and polyurethane, does not contain any chlorine-containing binders such as PVC or PVdC. In the visible wavelength range of electromagnetic radiation, this printing ink appears white or shimmering white-silver when viewed from above and when viewed through.
- both printing inks are translucent or preferably transparent, so that the elements arranged between or behind the two printing inks can be recognized when illuminated with IR radiation.
- the substrate and the elements are not visible to a viewer and are therefore hidden.
- the elements can be designed, for example, in the form of a text, character, pattern or coding. These elements r can also represent information for IR sensors, which are common, for example, in bank note processing machines.
- a combination of printed elements with printed machine-readable elements, such as magnetic properties, is possible, which are covered by one or both printing inks and only become recognizable under IR observation.
- first and / or second printing color can also be designed in the form of a text, character, pattern or coding and, when illuminated with visible radiation, represent information for the viewer.
- the first and second printing inks are translucent or preferably transparent in the wavelength range of electromagnetic radiation from 800 nm to 1000 nm.
- the substrate of the security element is a plastic film and consists, for example, of polyethylene terephthalate (PET).
- PET polyethylene terephthalate
- the security element is then subsequently applied to the surface of a document of value or at least partially introduced into the substrate of the document of value.
- the document of value can have a substrate and is the substrate of the security element the substrate of the document of value.
- the security element does not have a substrate of its own, but rather the first and / or second printing ink is applied to the substrate of the document of value.
- the first and / or second printing ink is particularly preferably a solvent-based, water-based or UV-curable printing ink or toner which is printed onto the substrate of the security element by gravure printing, digital printing, UV offset printing, screen printing, inkjet printing or flexographic printing.
- a particular advantage of the invention is an additional detection of the authenticity of a document of value, for example a passport paper, by illuminating the printing inks with electromagnetic radiation in the infrared wavelength range.
- These are hidden security features, so-called level 2 features or "hidden features”.
- the authenticity of the security element can thus be checked by means of IR sensors or IR testing devices (such as an IR camera), since when illuminated with electromagnetic radiation in the infrared wavelength range the first and second printing inks are translucent or transparent and the IR-absorbing elements behind them shine through to let.
- the first printing ink is sufficiently opaque and does not allow IR-absorbing elements behind it to shine through in the direction of view.
- the security element according to the invention can also have further printing features, such as fluorescence (full-surface, strip-shaped, single-colored, multi-colored). It is also possible to combine several layers of the first and / or second printing ink and a metallization (Al, Cr, Cu, Ni etc.) or of pigmented metallic printing inks or of magnetic printing inks.
- a metallization Al, Cr, Cu, Ni etc.
- first and second printing inks used according to the invention which have, for example, poor resistance to solvents, acids, alkalis and / or bleaches, increase the security against manipulation as a supplement to the chemical protection of the substrate or paper.
- the texts, patterns, characters, codes or other elements applied to the substrate can also consist of an IR-translucent or IR-transparent and IR-absorbing printing ink, which, when arranged next to one another, result in a different pattern when illuminated with electromagnetic radiation in the infrared wavelength range.
- the IR-translucent or transparent printing inks can also have fluorescent properties. When illuminated with visible electromagnetic radiation, the printing inks are visible, while when illuminated with electromagnetic radiation in the infrared wavelength range they cannot be recognized and fluoresce when illuminated with electromagnetic radiation in the ultraviolet wavelength range.
- the IR-translucent or -transparent printing inks can also have a different color shade under UV light, so that when illuminated with visible electromagnetic radiation a pattern can be recognized, for example a star, which when illuminated with UV light a pattern of two or more fluorescent ones Colors becomes recognizable.
- the second printing ink can also be colored with other dyes, so that an overall golden hue is obtained, for example, by adding a yellow dye.
- Documents of value for which a security element according to the invention can be used are, in particular, banknotes, stocks, bonds, certificates, vouchers, checks, high-quality entry tickets, but also other papers at risk of forgery, such as passports and other identification documents, as well as cards such as credit or debit cards, and also product security elements such as labels, seals, packaging, folding boxes, package inserts and the like.
- the simplified designation of value document includes all of the above materials, documents and product security means.
- Information in the sense of this invention is a pattern designed and visually perceptible or machine-readable representation. This can, for example, form an alphanumeric string of digits and / or letters, a graphic image, an image, a text or other characters, for example in the form of a code.
- the information particularly preferably consists of positive and / or negative motifs. In the case of a positive motif, a motif element itself is applied to the substrate, whereas in the case of a negative motif, the area surrounding the motif element is applied to the substrate.
- a positive motif is, for example, a letter printed in dark color on the light-colored substrate.
- a negative motif is, for example, an area which is applied to the light-colored substrate in a dark color and which has an unprinted area in the form of a letter within the area.
- translucency means that an object, such as the substrate or the printing inks, allows a certain proportion of incident electromagnetic radiation of the respective wavelength to pass through. If electromagnetic radiation of a wavelength range hits one side of the object, a certain proportion of this electromagnetic radiation is allowed through to the other side of the object and exits there again. The greater the percentage of the passing electromagnetic radiation of a wavelength range in relation to the incident electromagnetic radiation of this wavelength range, the more translucent the object is for this wavelength range.
- the object is referred to as transparent for this wavelength range.
- an object that allows less than 10% and preferably about 0% of the incident electromagnetic radiation to pass through ie in which the proportion of the electromagnetic radiation passing through is low or close to or equal to zero in relation to the incident electromagnetic radiation of a wavelength range, is considered to be opaque or designated as not permeable to electromagnetic radiation of this wavelength range.
- front side or back side of the substrate or value document are relative terms which can also be referred to as “one” and “the opposite” side and which form the majority of the total surface of the substrate or value document.
- Fig. 1 shows a schematic side view of a security element according to the invention in accordance with a first exemplary embodiment.
- a first printing ink D1 is printed on the front side VS, which is transparent in the infrared wavelength range of electromagnetic radiation and is opaque in the visible wavelength range of electromagnetic radiation dark or black in color.
- a second printing ink D2 is printed on the first printing ink D1, which is transparent in the infrared wavelength range of electromagnetic radiation and is translucent in the visible wavelength range of electromagnetic radiation and has a white or whitish-silver hue.
- both printing inks D1 and D2 are transparent and an IR sensor detects the front side VS of the substrate 1.
- Fig. 2 shows a schematic side view of a security element according to the invention in accordance with a second exemplary embodiment, in which compared to the first exemplary embodiment from FIG Fig. 1 the printing ink D1 is not printed over the entire surface, but rather only in certain areas on the substrate 1.
- the security element appears silver-colored to the viewer B when illuminated with visible light.
- the security element appears for the viewer B in the white or whitish-silver color of the printing ink D2 when illuminated with visible light.
- the viewer B recognizes the dark or black hue of the printing ink D1 when illuminated with visible light.
- Fig. 3 shows a schematic side view of a security element according to the invention in accordance with a third exemplary embodiment, in which compared with the first exemplary embodiment from FIG Fig. 1 between the printing ink D1 and the substrate 1, a printing ink 2 is printed in areas which is opaque in the infrared wavelength range of electromagnetic radiation.
- both printing inks D1 and D2 are transparent and an IR sensor detects the areas with printing ink 2 and between these areas the front side VS of substrate 1.
- printing ink D1 is opaque and a viewer B does not see the printing ink 2.
- a metallization can be located between the printing ink 2 and the substrate 1 or on the back of the substrate 1.
- a further printing ink or a metallization can be applied in areas on the front side of the printing ink D2, which is opaque in the visual and infrared wavelength range of electromagnetic radiation and is preferably arranged in the lateral direction between the areas of the printing ink 2.
- a viewer thus sees when there is lighting with electromagnetic radiation in the visible wavelength range, these areas of further printing ink or metallization.
- an IR sensor detects the areas with the printing ink 2 and the areas of the further printing ink or metallization arranged between them, so that the areas of the printing ink 2 and the further printing ink or metallization add to another piece of information.
- Fig. 4 shows a schematic side view of a security element according to the invention in accordance with a fourth exemplary embodiment, in which compared with the first exemplary embodiment from FIG Fig. 1 on the printing ink D2 further areas D2.2 are printed with the same printing ink as the printing ink D2. At the points where the areas D2.2 and the layer with the printing ink D2 overlap, there is a greater layer thickness for the printing ink D2 for the viewer B, so that these areas appear brighter when illuminated with electromagnetic radiation in the visible wavelength range, than the areas in between.
- the printing ink D2 can also be applied to the substrate 1 with a greater thickness at the points D2.2.
- FIG. 5 shows a schematic side view of a security element according to the invention in accordance with a fifth exemplary embodiment, in which, compared with the first exemplary embodiment, FIG Fig. 1 the printing ink D1 is arranged on the rear side of the substrate 10.
- the printing ink D2 is arranged on the front side of the substrate 10.
- the substrate 10 is translucent or preferably transparent at least in partial areas of the visible and infrared wavelength range of electromagnetic radiation. This exemplary embodiment thus shows an example of the subject matter of claim 3.
- Fig. 6 shows a schematic side view of a security element according to the invention in accordance with a sixth exemplary embodiment, in which compared with the first exemplary embodiment from FIG Fig. 1 the printing ink D2 is arranged on the rear side of the substrate 10.
- the printing ink D1 is arranged on the side of the printing ink D2 which is opposite the viewer B or the substrate 10.
- the substrate 10 is translucent or preferably transparent at least in partial areas of the visible and infrared wavelength range of electromagnetic radiation. This exemplary embodiment thus shows an example of the subject matter of claim 4.
Abstract
Auf dem Substrat eines Sicherheitselements ist eine erste Druckfarbe (D1) angeordnet, die im infraroten Wellenlängenbereich elektromagnetischer Strahlung transluzent oder bevorzugt transparent ist und im sichtbaren Wellenlängenbereich elektromagnetischer Strahlung opak ist und an sich einen dunklen oder schwarzen Farbton aufweist. In Blickrichtung zwischen dem Betrachter und der ersten Druckfarbe ist eine zweite Druckfarbe (D2) angeordnet, die im infraroten Wellenlängenbereich elektromagnetischer Strahlung ebenfalls transluzent oder bevorzugt transparent ist und im sichtbaren Wellenlängenbereich elektromagnetischer Strahlung transluzent ist und an sich einen weißen oder weißlich-silbernen Farbton aufweist. Für den Betrachter sind die erste und die zweite Druckfarbe in mindestens einem Überlappungsbereich übereinander angeordnet, so dass sich für den Betrachter in dem mindestens einen Überlappungsbereich im sichtbaren Wellenlängenbereich elektromagnetischer Strahlung insgesamt ein silberner Farbton ergibt.Das Substrat hat eine Vorderseite und eine Rückseite. Der Betrachter betrachtet das Substrat in Draufsicht von der Vorderseite.A first printing ink (D1) is arranged on the substrate of a security element, which is translucent or preferably transparent in the infrared wavelength range of electromagnetic radiation and is opaque in the visible wavelength range of electromagnetic radiation and has a dark or black hue. In the viewing direction between the viewer and the first printing ink, a second printing ink (D2) is arranged, which is also translucent or preferably transparent in the infrared wavelength range of electromagnetic radiation and is translucent in the visible wavelength range of electromagnetic radiation and has a white or whitish-silver hue. For the viewer, the first and the second printing inks are arranged one above the other in at least one overlap area, so that for the viewer there is an overall silver hue in the at least one overlap area in the visible wavelength range of electromagnetic radiation. The substrate has a front side and a rear side. The viewer views the substrate in a plan view from the front.
Description
Die Erfindung betrifft ein Sicherheitselement für ein Wertdokument, beispielsweise für eine Banknote oder einen Pass, wobei das Sicherheitselement ein Substrat mit einer Vorderseite und einer Rückseite aufweist, wobei ein Betrachter das Substrat des Sicherheitselements von der Vorderseite, also in Draufsicht betrachtet.The invention relates to a security element for a document of value, for example for a bank note or a passport, the security element having a substrate with a front side and a rear side, with a viewer viewing the substrate of the security element from the front side, that is, in plan view.
Gattungsgemäße Sicherheitselemente, wie beispielsweise Sicherheitsfäden für Passpapiere, werden im Stand der Technik als sogenannte Country-Code-Fäden mit einer Flagge und einem Negativ- oder Positivtext im Tiefdruck, UV-Offset oder Digitaldruck auf einem Kunststoffsubstrat hergestellt. Zusätzlich können diese Sicherheitsfäden mit einer Fluoreszenz ausgestattet sein. Für den Text (Negativ- oder Positivtext) wird jeweils die gleiche Druckfarbe mit den gleichen Eigenschaften verwendet.Generic security elements, such as security threads for passport papers, are produced in the prior art as so-called country code threads with a flag and a negative or positive text in gravure printing, UV offset or digital printing on a plastic substrate. In addition, these security threads can be equipped with fluorescence. The same printing color with the same properties is used for the text (negative or positive text).
Als weitere gattungsgemäße Sicherheitselemente sind beispielsweise Sicherheitsfolien bekannt, die auf die Oberfläche des Substrats einer Banknote aufgebracht werden. Bei den Eurobanknoten der zweiten Generation reichen derartige Sicherheitsfolien vom oberen Rand bis zum unteren Rand der Banknoten und überdecken ein Loch in den Banknoten. Bei den Eurobanknoten der ersten Generation befindet sich bei den Nominationen von 50 € und mehr eine Sicherheitsfolie in Form eines Einzelelements, ein sogenannter Folien-Patch.As further generic security elements, for example security films are known which are applied to the surface of the substrate of a bank note. In the case of the second-generation euro banknotes, such security films extend from the upper edge to the lower edge of the banknotes and cover a hole in the banknotes. In the case of the first generation euro banknotes, nominations of € 50 and more have a security film in the form of a single element, a so-called film patch.
Aus
Weitere gattungsgemäße Sicherheitselemente sind beispielweise Sicherheitsfäden mit optischen Eigenschaften, wie zum Beispiel Hologramme oder Flüssigkristallfarben, Metallisierungen mit oder ohne Farbkippeffekten und/oder Wölbkippeffekten, sowie Sicherheitsfäden mit magnetischen Eigenschaften.Further generic security elements are, for example, security threads with optical properties, such as, for example, holograms or liquid crystal colors, metallizations with or without color-shifting effects and / or cambering-tilting effects, as well as security threads with magnetic properties.
Der Erfindung liegt deshalb die Aufgabe zugrunde, ein gattungsgemäßes Sicherheitselement derart weiterzubilden, dass die Nachteile des Standes der Technik behoben werden und der Schutz gegenüber Fälschungen weiter erhöht wird.The invention is therefore based on the object of developing a generic security element in such a way that the disadvantages of the prior art are eliminated and the protection against counterfeiting is further increased.
Diese Aufgabe wird durch die Merkmale des unabhängigen Anspruchs gelöst. Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche.This object is achieved by the features of the independent claim. Developments of the invention are the subject of the dependent claims.
Erfindungsgemäß ist auf dem Substrat des Sicherheitselements eine erste Druckfarbe angeordnet, die im infraroten Wellenlängenbereich elektromagnetischer Strahlung transluzent oder bevorzugt transparent ist und im sichtbaren Wellenlängenbereich elektromagnetischer Strahlung opak ist und an sich einen dunklen oder schwarzen Farbton aufweist. In Blickrichtung zwischen dem Betrachter und der ersten Druckfarbe ist eine zweite Druckfarbe angeordnet, die im infraroten Wellenlängenbereich elektromagnetischer Strahlung ebenfalls transluzent oder bevorzugt transparent ist und im sichtbaren Wellenlängenbereich elektromagnetischer Strahlung transluzent ist und an sich einen weißen oder weißlich-silbernen Farbton aufweist. Für den Betrachter sind die erste und die zweite Druckfarbe in mindestens einem Überlappungsbereich übereinander angeordnet, so dass sich für den Betrachter in dem mindestens einen Überlappungsbereich im sichtbaren Wellenlängenbereich elektromagnetischer Strahlung insgesamt ein silberner Farbton ergibt. Die erste Druckfarbe befindet sich somit im Überlappungsbereich in Blickrichtung hinter der zweiten Druckfarbe und ergibt sich durch das Zusammenwirken beider Druckfarben für den Betrachter im sichtbaren Wellenlängenbereich elektromagnetischer Strahlung bzw. visuell ein insgesamt silberner Farbton im Überlappungsbereich.According to the invention, a first printing ink is arranged on the substrate of the security element, which is translucent or preferably transparent in the infrared wavelength range of electromagnetic radiation and is opaque in the visible wavelength range of electromagnetic radiation and has a dark or black shade per se. In the viewing direction between the viewer and the first printing ink, a second printing ink is arranged, which is also translucent or preferably transparent in the infrared wavelength range of electromagnetic radiation and is translucent in the visible wavelength range of electromagnetic radiation and has a white or whitish-silver hue. To the viewer, the first and second printing inks are in at least one Overlap area arranged one above the other, so that overall a silver hue results for the viewer in the at least one overlap area in the visible wavelength range of electromagnetic radiation. The first printing ink is thus located in the overlapping area behind the second printing ink in the viewing direction and results from the interaction of the two printing inks for the viewer in the visible wavelength range of electromagnetic radiation or visually an overall silver hue in the overlapping area.
Die Formulierung, dass die erste bzw. zweite Druckfarbe "an sich" einen dunklen oder schwarzen bzw. weißen Farbton aufweist, bedeutet hierbei, im Sinne dieser Erfindung dass die jeweilige Druckfarbe für sich genommen, also ohne eine Zusammenwirkung mit einer anderen Druckfarbe, diesen Farbton aufweist. Wäre also ausschließlich die erste oder zweite Druckfarbe auf dem Substrat angeordnet, würde die erste oder zweite Druckfarbe diesen Farbton aufweisen.The formulation that the first or second printing ink "per se" has a dark or black or white color tone means, within the meaning of this invention, that the respective printing ink taken by itself, that is, without interaction with another printing ink, this color tone having. If only the first or second printing ink were arranged on the substrate, the first or second printing ink would have this color tone.
Erfindungsgemäß werden also zwei für IR-Strahlung transparente Druckfarben miteinander kombiniert, wobei im visuell sichtbaren Wellenlängenbereich die erste Druckfarbe opak und die zweite Druckfarbe transluzent ist und wobei die zweite Druckfarbe mit dem weißen Farbton in Blickrichtung über die dunkle oder schwarze erste Druckfarbe aufgebracht ist. Durch die Kombination der beiden Druckfarben ergibt sich für den Betrachter im Überlappungsbereich insgesamt ein silberner Farbton.According to the invention, two printing inks transparent to IR radiation are combined with one another, the first printing ink being opaque and the second printing ink translucent in the visually visible wavelength range, and the second printing ink with the white shade being applied over the dark or black first printing ink in the viewing direction. The combination of the two printing inks gives the viewer an overall silver hue in the overlapping area.
Gemäß einer ersten Ausführungsform kann die erste Druckfarbe auf der Vorderseite des Substrats des Sicherheitselements angeordnet sein und die zweite Farbe über der ersten Druckfarbe angeordnet sein. Hierbei sind beide Druckfarben auf der Vorderseite des Substrats des Sicherheitselements angeordnet.According to a first embodiment, the first printing ink can be arranged on the front side of the substrate of the security element and the second color can be arranged above the first printing ink. Here, both printing inks are arranged on the front side of the substrate of the security element.
Gemäß einer alternativen Ausführungsform ist das Substrat des Sicherheitselements mindestens in Teilbereichen des sichtbaren und des infraroten Wellenlängenbereichs elektromagnetischer Strahlung transluzent oder bevorzugt transparent, wobei die erste Druckfarbe auf der Rückseite des Substrats des Sicherheitselements angeordnet ist und die zweite Farbe auf der Vorderseite des Substrats des Sicherheitselements angeordnet ist. Die erste Druckfarbe ist hierbei von der Vorderseite des Substrats durch das transluzente oder bevorzugt transparente Substrat hindurch sichtbar und erkennbar.According to an alternative embodiment, the substrate of the security element is translucent or preferably transparent at least in partial areas of the visible and infrared wavelength range of electromagnetic radiation, the first printing ink being arranged on the back of the substrate of the security element and the second color being arranged on the front side of the substrate of the security element is. The first printing ink is visible and recognizable from the front side of the substrate through the translucent or preferably transparent substrate.
Gemäß einer weiteren alternativen Ausführungsform ist das Substrat des Sicherheitselements mindestens in Teilbereichen des sichtbaren und des infraroten Wellenlängenbereichs elektromagnetischer Strahlung transluzent oder bevorzugt transparent, wobei die erste Druckfarbe auf der Rückseite des Substrats des Sicherheitselements angeordnet ist und die zweite Farbe zwischen der ersten Farbe und dem Substrat des Sicherheitselements angeordnet ist. Die erste und die zweite Druckfarbe ist hierbei von der Vorderseite des Substrats durch das transluzente oder bevorzugt transparente Substrat hindurch sichtbar und erkennbar.According to a further alternative embodiment, the substrate of the security element is translucent or preferably transparent, at least in partial areas of the visible and infrared wavelength range of electromagnetic radiation, the first printing ink being arranged on the back of the substrate of the security element and the second color between the first color and the substrate of the security element is arranged. The first and the second printing inks are visible and recognizable from the front side of the substrate through the translucent or preferably transparent substrate.
Besonders bevorzugt ist die erste Druckfarbe mit einer Auftragsmenge von etwa 1 g/m2 bis etwa 3 g/m2 aufgebracht und die zweite Druckfarbe mit einer Auftragsmenge von etwa 2 g/m2 bis etwa 8 g/m2. Hierbei gilt, dass je größer die Auftragsmenge und damit die Schichtdicke der zweiten Druckfarbe gewählt wird, desto heller erscheint das Sicherheitselement im visuell sichtbaren Wellenlängenbereich. Umgekehrt gilt, dass je geringer die Auftragsmenge und damit die Schichtdicke der zweiten Druckfarbe gewählt wird, umso dunkler erscheint das Sicherheitselement im visuell sichtbaren Wellenlängenbereich. Bei einer Auftragsmenge der zweiten Druckfarbe von etwa 2 g/m2 erscheint das Sicherheitselement somit dunkler als bei einer Auftragsmenge der zweiten Druckfarbe von etwa 8 g/m2.The first printing ink is particularly preferably applied with an application rate of approximately 1 g / m 2 to approximately 3 g / m 2 and the second printing ink with an application rate of approximately 2 g / m 2 to approximately 8 g / m 2 . The rule here is that the greater the amount applied and thus the layer thickness of the second printing ink that is selected, the brighter the security element appears in the visually visible wavelength range. Conversely, the lower the amount applied and thus the layer thickness of the second printing ink that is selected, the darker the security element appears in the visually visible wavelength range. With an order quantity of the second printing color of about 2 g / m 2 , the security element thus appears darker than with an application quantity of the second printing ink of about 8 g / m 2 .
Die erste Druckfarbe ist beispielsweise die Druckfarbe
Die zweite Druckfarbe ist beispielsweise die Druckfarbe
Im infraroten Wellenlängenbereich elektromagnetischer Strahlung sind beide Druckfarben transluzent oder bevorzugt transparent, so dass das zwischen oder hinter den beiden Druckfarben angeordnete Elemente, bei Beleuchtung mit IR-Strahlung erkennbar werden. Bei Beleuchtung mit sichtbarer Strahlung sind das Substrat und die Elemente hingegen für einen Betrachter nicht sichtbar und somit verborgen. Die Elemente können beispielsweise in Form eines Textes, Zeichens, Musters oder einer Codierung ausgestaltet sein. Diese Elemente r können auch eine Information für IR-Sensoren darstellen, die beispielweise bei Banknotenbearbeitungsmaschinen üblich sind. Zudem ist eine Kombination von gedruckten Elementen mit gedruckten maschinenlesbaren Elementen, wie zum Beispiel magnetische Eigenschaften, möglich, die von einer oder beiden Druckfarben überdeckt und erst unter IR-Betrachtung erkennbar werden.In the infrared wavelength range of electromagnetic radiation, both printing inks are translucent or preferably transparent, so that the elements arranged between or behind the two printing inks can be recognized when illuminated with IR radiation. When illuminated with visible radiation, on the other hand, the substrate and the elements are not visible to a viewer and are therefore hidden. The elements can be designed, for example, in the form of a text, character, pattern or coding. These elements r can also represent information for IR sensors, which are common, for example, in bank note processing machines. In addition, a combination of printed elements with printed machine-readable elements, such as magnetic properties, is possible, which are covered by one or both printing inks and only become recognizable under IR observation.
Selbstverständlich können auch die erste und/oder zweite Druckfarbe in Form eines Textes, Zeichens, Musters oder einer Codierung ausgestaltet sein und bei Beleuchtung mit sichtbarer Strahlung eine Information für den Betrachter darstellen.Of course, the first and / or second printing color can also be designed in the form of a text, character, pattern or coding and, when illuminated with visible radiation, represent information for the viewer.
Gemäß einer vorteilhaften Ausgestaltung sind die erste und zweite Druckfarbe im Wellenlängenbereich elektromagnetischer Strahlung von 800 nm bis 1000 nm transluzent oder bevorzugt transparent.According to an advantageous embodiment, the first and second printing inks are translucent or preferably transparent in the wavelength range of electromagnetic radiation from 800 nm to 1000 nm.
Gemäß einer weiteren vorteilhaften Ausgestaltung ist das Substrat des Sicherheitselements eine Kunststofffolie und besteht beispielsweise aus Polyethylenterephthalat (PET). Das Sicherheitselement wird dann nachträglich auf die Oberfläche eines Wertdokuments aufgebracht oder mindestens teilweise in das Substrat des Wertdokuments eingebracht. Alternativ kann das Wertdokument ein Substrat aufweisen und ist das Substrat des Sicherheitselements das Substrat des Wertdokuments. Hierbei weist das Sicherheitselement kein eigenes Substrat auf, sondern ist die erste und/oder zweite Druckfarbe auf das Substrat des Wertdokuments aufgebracht.According to a further advantageous embodiment, the substrate of the security element is a plastic film and consists, for example, of polyethylene terephthalate (PET). The security element is then subsequently applied to the surface of a document of value or at least partially introduced into the substrate of the document of value. Alternatively, the document of value can have a substrate and is the substrate of the security element the substrate of the document of value. In this case, the security element does not have a substrate of its own, but rather the first and / or second printing ink is applied to the substrate of the document of value.
Besonders bevorzugt ist die erste und/oder zweite Druckfarbe eine lösungsmittelbasierende, wasserbasierende oder UV-härtbare Druckfarbe bzw. Toner, die im Tiefdruck, Digitaldruck, UV-Offset-Druck, Siebdruck, Inkjet-Druck oder Flexodruck auf das Substrat des Sicherheitselements aufgedruckt ist.The first and / or second printing ink is particularly preferably a solvent-based, water-based or UV-curable printing ink or toner which is printed onto the substrate of the security element by gravure printing, digital printing, UV offset printing, screen printing, inkjet printing or flexographic printing.
Besonderer Vorteil der Erfindung ist eine zusätzliche Erkennung der Echtheit eines Wertdokuments, beispielsweise eines Passpapiers, durch Beleuchtung der Druckfarben mit elektromagnetischer Strahlung im infraroten Wellenlängenbereich. Es handelt sich dabei um verborgene Sicherheitsmerkmale, sogenannte Level 2 Merkmale oder "Hidden-Features". Mittels IR-Sensoren oder IR-Prüfgeräten (wie beispielsweise einer IR-Kamera) kann somit die Echtheit des Sicherheitselementes geprüft werden, da bei Beleuchtung mit elektromagnetischer Strahlung im infraroten Wellenlängenbereich die erste und zweite Druckfarbe durchscheinend oder durchsichtig sind und dahinterliegende IR-absorbierende Elemente durchscheinen lassen. Bei Beleuchtung mit sichtbarer elektromagnetischer Strahlung bzw. Licht mit einer Wellenlänge von etwa 380 nm bis etwa 750 nm ist die erste Druckfarbe ausreichend opak und lässt in Blickrichtung dahinterliegende IR-absorbierende Elemente nicht durchscheinen.A particular advantage of the invention is an additional detection of the authenticity of a document of value, for example a passport paper, by illuminating the printing inks with electromagnetic radiation in the infrared wavelength range. These are hidden security features, so-called
Durch die Kombination mehrerer Level 2 Merkmale (beispielsweise UV kurz- und langwellige Fluoreszenz, IR Transparenz und Sichtbarkeit, Anti-Stokes) kann die Fälschungssicherheit weiter erhöht werden. Das erfindungsgemäße Sicherheitselement kann dabei neben der ersten und zweiten Druckfarbe auch weitere Druckfeatures, wie beispielsweise Fluoreszenz (vollflächig, streifenförmig, einfarbig, mehrfarbig) aufweisen. Ebenso ist auch die Kombination mehrerer Schichten aus der ersten und/oder zweiten Druckfarbe und einer Metallisierung (Al, Cr, Cu, Ni etc.) oder aus pigmentierten metallischen Druckfarben oder aus magnetischen Druckfarben möglich.By combining
Zusätzlich kann durch die erfindungsgemäß verwendete ersten und zweiten Druckfarbe, die beispielsweise eine schlechte Beständigkeit gegen Lösungsmittel, Säuren, Laugen und/oder Bleichmittel aufweisen, die Manipulationssicherheit als Ergänzung zur chemischen Sicherung des Substrats bzw. Papiers erhöht werden.In addition, the first and second printing inks used according to the invention, which have, for example, poor resistance to solvents, acids, alkalis and / or bleaches, increase the security against manipulation as a supplement to the chemical protection of the substrate or paper.
Die auf das Substrat aufgetragenen Texte, Muster, Zeichen, Codierungen oder andere Elemente können ebenfalls aus einer IR-transluzenten oder - transparenten und IR-absorbierenden Druckfarbe bestehen, die nebeneinander angeordnet bei Beleuchtung mit elektromagnetischer Strahlung im infraroten Wellenlängenbereich wiederum ein anders Muster ergeben.The texts, patterns, characters, codes or other elements applied to the substrate can also consist of an IR-translucent or IR-transparent and IR-absorbing printing ink, which, when arranged next to one another, result in a different pattern when illuminated with electromagnetic radiation in the infrared wavelength range.
Die IR-transluzenten oder -transparenten Druckfarben können auch fluoreszierende Eigenschaften haben. Bei Beleuchtung mit sichtbarer elektromagnetischer Strahlung sind die Druckdruckfarben sichtbar, während sie bei Beleuchtung mit elektromagnetischer Strahlung im infraroten Wellenlängenbereich nicht erkennbar sind und bei Beleuchtung mit elektromagnetischer Strahlung im ultravioletten Wellenlängenbereich fluoreszieren. Die IR-transluzenten oder -transparenten Druckfarben können auch unter UV-Licht einen anderen Farbton besitzen, so dass bei Beleuchtung mit sichtbarer elektromagnetischer Strahlung ein Muster erkennbar ist, beispielsweise ein Stern, welches bei Beleuchtung mit UV-Licht ein Muster aus zwei oder mehreren fluoreszierenden Farben erkennbar wird.The IR-translucent or transparent printing inks can also have fluorescent properties. When illuminated with visible electromagnetic radiation, the printing inks are visible, while when illuminated with electromagnetic radiation in the infrared wavelength range they cannot be recognized and fluoresce when illuminated with electromagnetic radiation in the ultraviolet wavelength range. The IR-translucent or -transparent printing inks can also have a different color shade under UV light, so that when illuminated with visible electromagnetic radiation a pattern can be recognized, for example a star, which when illuminated with UV light a pattern of two or more fluorescent ones Colors becomes recognizable.
Gemäß einer weiteren Ausführungsform kann die zweite Druckfarbe auch zusätzlich mit anderen Farbstoffen eingefärbt werden, so dass man beispielweise durch Hinzufügen eines gelben Farbstoffs einen insgesamt goldenen Farbton erhält.According to a further embodiment, the second printing ink can also be colored with other dyes, so that an overall golden hue is obtained, for example, by adding a yellow dye.
Wertdokumente, für die ein erfindungsgemäßes Sicherheitselement verwendet werden kann, sind insbesondere Banknoten, Aktien, Anleihen, Urkunden, Gutscheine, Schecks, hochwertige Eintrittskarten, aber auch andere fälschungsgefährdete Papiere, wie Pässe und sonstige Ausweisdokumente, sowie Karten, wie beispielsweise Kredit- oder Debitkarten, und auch Produktsicherungselemente, wie Etiketten, Siegel, Verpackungen, Faltschachteln, Beipackzettel und dergleichen.Documents of value for which a security element according to the invention can be used are, in particular, banknotes, stocks, bonds, certificates, vouchers, checks, high-quality entry tickets, but also other papers at risk of forgery, such as passports and other identification documents, as well as cards such as credit or debit cards, and also product security elements such as labels, seals, packaging, folding boxes, package inserts and the like.
Die vereinfachte Benennung Wertdokument schließt alle oben genannten Materialien, Dokumente und Produktsicherungsmittel ein.The simplified designation of value document includes all of the above materials, documents and product security means.
Eine Information im Sinne dieser Erfindung ist eine musterförmig gestaltete und visuell wahrnehmbare oder maschinenlesbare Darstellung. Diese kann beispielsweise eine alphanumerische Zeichenfolge aus Ziffern und/oder Buchstaben, eine graphische Abbildung, ein Bild, einen Text oder sonstige Zeichen beispielweise in Form einer Codierung bilden. Besonders bevorzugt besteht die Information dabei aus positiven oder/und negativen Motiven. Bei einem positiven Motiv wird hierbei ein Motivelement selbst auf das Substrat aufgebracht, wohingegen bei einem negativen Motiv der das Motivelement umgebende Bereich auf das Substrat aufgebracht wird. Ein positives Motiv ist beispielsweise ein in dunkler Farbe auf das helle Substrat aufgedruckter Buchstabe. Ein negatives Motiv ist beispielsweise eine in dunkler Farbe auf das helle Substrat aufgebrachte Fläche, die innerhalb der Fläche einen unbedruckten Bereich in Form eines Buchstabens aufweist. Transluzenz bedeutet im Sinne dieser Erfindung, dass ein Objekt, wie das Substrat oder die Druckfarben, auftreffende elektromagnetische Strahlung der jeweiligen Wellenlänge in einem bestimmten Anteil hindurchtreten lässt. Trifft elektromagnetische Strahlung eines Wellenlängenbereichs auf eine Seite des Objekts auf, wird ein bestimmter Anteil dieser elektromagnetischen Strahlung bis zu der anderen Seite des Objekts hindurch gelassen und tritt dort wieder aus. Je größer der prozentuale Anteil der hindurchtretenden elektromagnetischen Strahlung eines Wellenlängenbereichs bezogen auf die auftreffende elektromagnetische Strahlung dieses Wellenlängenbereichs ist, desto transluzenter ist das Objekt für diesen Wellenlängenbereich. Liegt der prozentuale Anteil bei mindestens 90 %, d.h. lässt das Objekt die auftreffende elektromagnetische Strahlung eines Wellenlängenbereichs nahezu ungeschwächt hindurchtreten, wird das Objekt als transparent für diesen Wellenlängenbereich bezeichnet. Ein Objekt hingegen, das weniger als 10 % und bevorzugt etwa 0 % der auftreffenden elektromagnetische Strahlung hindurchtreten lässt, d.h. bei dem der Anteil der hindurchtretenden elektromagnetische Strahlung bezogen auf die auftreffende elektromagnetische Strahlung eines Wellenlängenbereichs gering oder nahe oder gleich Null ist, wird als opak oder als nicht durchlässig für elektromagnetische Strahlung dieses Wellenlängenbereichs bezeichnet.Information in the sense of this invention is a pattern designed and visually perceptible or machine-readable representation. This can, for example, form an alphanumeric string of digits and / or letters, a graphic image, an image, a text or other characters, for example in the form of a code. The information particularly preferably consists of positive and / or negative motifs. In the case of a positive motif, a motif element itself is applied to the substrate, whereas in the case of a negative motif, the area surrounding the motif element is applied to the substrate. A positive motif is, for example, a letter printed in dark color on the light-colored substrate. A negative motif is, for example, an area which is applied to the light-colored substrate in a dark color and which has an unprinted area in the form of a letter within the area. In the context of this invention, translucency means that an object, such as the substrate or the printing inks, allows a certain proportion of incident electromagnetic radiation of the respective wavelength to pass through. If electromagnetic radiation of a wavelength range hits one side of the object, a certain proportion of this electromagnetic radiation is allowed through to the other side of the object and exits there again. The greater the percentage of the passing electromagnetic radiation of a wavelength range in relation to the incident electromagnetic radiation of this wavelength range, the more translucent the object is for this wavelength range. If the percentage is at least 90%, ie if the object allows the incident electromagnetic radiation of a wavelength range to pass through virtually unattenuated, the object is referred to as transparent for this wavelength range. On the other hand, an object that allows less than 10% and preferably about 0% of the incident electromagnetic radiation to pass through, ie in which the proportion of the electromagnetic radiation passing through is low or close to or equal to zero in relation to the incident electromagnetic radiation of a wavelength range, is considered to be opaque or designated as not permeable to electromagnetic radiation of this wavelength range.
Die Begriffe "Vorderseite" oder "Rückseite" des Substrats oder Wertdokuments sind relative Begriffe, die auch als "die eine" und "die gegenüberliegende" Seite bezeichnet werden können und die den überwiegenden Anteil der Gesamtoberfläche des Substrats oder Wertdokuments bilden.The terms “front side” or “back side” of the substrate or value document are relative terms which can also be referred to as “one” and “the opposite” side and which form the majority of the total surface of the substrate or value document.
Es versteht sich, dass die vorstehend genannten und die nachfolgend noch zu erläuternden Merkmale nicht nur in den angegebenen Kombinationen, sondern auch in anderen Kombinationen einsetzbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen, soweit dies von dem Schutzumfang der Ansprüche erfasst ist.It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the specified combinations, but also in other combinations, without the frame to depart from the present invention insofar as it is encompassed by the scope of the claims.
Anhand der nachfolgenden Ausführungsbeispiele und der ergänzenden Figuren werden die Vorteile der Erfindung erläutert. Die Ausführungsbeispiele stellen bevorzugte Ausführungsformen dar, auf die jedoch die Erfindung in keinerlei Weise beschränkt sein soll. Des Weiteren sind die Darstellungen in den Figuren des besseren Verständnisses wegen stark schematisiert und spiegeln nicht die realen Gegebenheiten wider. Insbesondere entsprechen die in den Figuren gezeigten Proportionen nicht den in der Realität vorliegenden Verhältnissen und dienen ausschließlich zur Verbesserung der Anschaulichkeit. Des Weiteren sind die in den folgenden Ausführungsbeispielen beschriebenen Ausführungsformen der besseren Verständlichkeit wegen auf die wesentlichen Kerninformationen reduziert. Bei der praktischen Umsetzung können wesentlich komplexere Muster oder Bilder zur Anwendung kommen.The advantages of the invention are explained on the basis of the following exemplary embodiments and the supplementary figures. The exemplary embodiments represent preferred embodiments to which, however, the invention is in no way intended to be restricted. Furthermore, the representations in the figures are highly schematic for better understanding and do not reflect the real conditions. In particular, the proportions shown in the figures do not correspond to the conditions present in reality and serve exclusively to improve the clarity. Furthermore, the embodiments described in the following exemplary embodiments are reduced to the essential core information for the sake of better understanding. In the practical implementation, much more complex patterns or images can be used.
Im Einzelnen zeigen schematisch:
- Fig. 1
- in Seitenansicht ein erfindungsgemäßes Sicherheitselement gemäß einem ersten Ausführungsbeispiel,
- Fig. 2
- in Seitenansicht ein erfindungsgemäßes Sicherheitselement gemäß einem zweiten Ausführungsbeispiel,
- Fig. 3
- in Seitenansicht ein erfindungsgemäßes Sicherheitselement gemäß einem dritten Ausführungsbeispiel,
- Fig. 4
- in Seitenansicht ein erfindungsgemäßes Sicherheitselement gemäß einem vierten Ausführungsbeispiel,
- Fig. 5
- in Seitenansicht ein erfindungsgemäßes Sicherheitselement gemäß einem fünften Ausführungsbeispiel,
- Fig. 6
- in Seitenansicht ein erfindungsgemäßes Sicherheitselement gemäß einem sechsten Ausführungsbeispiel.
- Fig. 1
- a side view of a security element according to the invention in accordance with a first exemplary embodiment,
- Fig. 2
- a side view of a security element according to the invention in accordance with a second exemplary embodiment,
- Fig. 3
- a side view of a security element according to the invention in accordance with a third exemplary embodiment,
- Fig. 4
- a side view of a security element according to the invention in accordance with a fourth exemplary embodiment,
- Fig. 5
- a side view of a security element according to the invention in accordance with a fifth exemplary embodiment,
- Fig. 6
- a side view of a security element according to the invention in accordance with a sixth exemplary embodiment.
Zusätzlich oder alternativ kann auf der Vorderseite der Druckfarbe D2 bereichsweise eine weitere Druckfarbe oder eine Metallisierung aufgebracht sein, die im visuellen und im infraroten Wellenlängenbereich elektromagnetischer Strahlung opak ist, und bevorzugt in lateraler Richtung zwischen den Bereichen der Druckfarbe 2 angeordnet ist. Ein Betrachter sieht damit bei Beleuchtung mit elektromagnetischer Strahlung im sichtbaren Wellenlängenbereich diese Bereiche der weiteren Druckfarbe oder Metallisierung. Bei Beleuchtung mit elektromagnetischer Strahlung im infraroten Wellenlängenbereich erkennt ein IR-Sensor die Bereiche mit der Druckfarbe 2 und die dazwischen angeordneten Bereiche der weiteren Druckfarbe oder Metallisierung, so dass sich die Bereiche der Druckfarbe 2 und der weiteren Druckfarbe oder Metallisierung zu einer weiteren Information ergänzen.Additionally or alternatively, a further printing ink or a metallization can be applied in areas on the front side of the printing ink D2, which is opaque in the visual and infrared wavelength range of electromagnetic radiation and is preferably arranged in the lateral direction between the areas of the
Anstatt eines zusätzlichen Aufdrucks D2.2 kann die Druckfarbe D2 an den Stellen D2.2 auch mit einer größeren Dicke auf das Substrat 1 aufgebracht sein.Instead of an additional imprint D2.2, the printing ink D2 can also be applied to the
Claims (9)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102020000790.2A DE102020000790A1 (en) | 2020-02-06 | 2020-02-06 | Security element with printing inks that are transparent when illuminated with electromagnetic radiation in the infrared wavelength range |
Publications (2)
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EP3862190A1 true EP3862190A1 (en) | 2021-08-11 |
EP3862190B1 EP3862190B1 (en) | 2022-11-16 |
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EP21000030.3A Active EP3862190B1 (en) | 2020-02-06 | 2021-02-01 | Security element with printing inks that become transparent when exposed to electromagnetic radiation in the infrared wavelength range |
Country Status (3)
Country | Link |
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EP (1) | EP3862190B1 (en) |
CN (1) | CN113212028B (en) |
DE (1) | DE102020000790A1 (en) |
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DE102021000892A1 (en) | 2021-02-19 | 2022-08-25 | Giesecke+Devrient Currency Technology Gmbh | Security element with transparent inks under IR illumination and a machine-readable feature |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19907697A1 (en) * | 1999-02-23 | 2000-08-24 | Giesecke & Devrient Gmbh | Security element with optically variable material for documents of value additionally comprises at least one machine readable distinguishing material which does not impair the effect of the optically variable material |
DE102008049595A1 (en) | 2008-09-30 | 2010-04-01 | Merck Patent Gmbh | Infrared absorbing inks |
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AU2011100778B4 (en) * | 2011-06-29 | 2011-10-13 | Ccl Secure Pty Ltd | Improvements in security devices incorporating colour shifting inks |
EP2991834B1 (en) * | 2013-05-01 | 2017-10-25 | Sicpa Holding Sa | Security elements exhibiting a dynamic visual motion |
DE102017106721A1 (en) * | 2017-03-29 | 2018-10-04 | Leonhard Kurz Stiftung & Co. Kg | Method for producing a multilayer film and a multilayer film, and a security element and a security document |
-
2020
- 2020-02-06 DE DE102020000790.2A patent/DE102020000790A1/en not_active Withdrawn
-
2021
- 2021-02-01 EP EP21000030.3A patent/EP3862190B1/en active Active
- 2021-02-04 CN CN202110166395.2A patent/CN113212028B/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19907697A1 (en) * | 1999-02-23 | 2000-08-24 | Giesecke & Devrient Gmbh | Security element with optically variable material for documents of value additionally comprises at least one machine readable distinguishing material which does not impair the effect of the optically variable material |
DE102008049595A1 (en) | 2008-09-30 | 2010-04-01 | Merck Patent Gmbh | Infrared absorbing inks |
Also Published As
Publication number | Publication date |
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EP3862190B1 (en) | 2022-11-16 |
CN113212028A (en) | 2021-08-06 |
DE102020000790A1 (en) | 2021-08-12 |
CN113212028B (en) | 2022-11-15 |
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