EP3862190A1 - Élément de sécurité présentant des encres d'impression transparentes lors de l'éclairage par rayonnement électromagnétique dans la plage de longueur d'onde infrarouge - Google Patents

Élément de sécurité présentant des encres d'impression transparentes lors de l'éclairage par rayonnement électromagnétique dans la plage de longueur d'onde infrarouge Download PDF

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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
Application number
EP21000030.3A
Other languages
German (de)
English (en)
Other versions
EP3862190B1 (fr
Inventor
Christian Schmitz
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 Currency Technology GmbH
Original Assignee
Giesecke and Devrient Currency Technology 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
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Publication of EP3862190A1 publication Critical patent/EP3862190A1/fr
Application granted granted Critical
Publication of EP3862190B1 publication Critical patent/EP3862190B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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.

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  • Printing Methods (AREA)
  • Credit Cards Or The Like (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
EP21000030.3A 2020-02-06 2021-02-01 Élément de sécurité présentant des encres d'impression transparentes lors de l'éclairage par rayonnement électromagnétique dans la plage de longueur d'onde infrarouge Active EP3862190B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020000790.2A DE102020000790A1 (de) 2020-02-06 2020-02-06 Sicherheitselement mit bei Beleuchtung mit elektromagnetischer Strahlung im infraroten Wellenlängenbereich transparenten Druckfarben

Publications (2)

Publication Number Publication Date
EP3862190A1 true EP3862190A1 (fr) 2021-08-11
EP3862190B1 EP3862190B1 (fr) 2022-11-16

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EP21000030.3A Active EP3862190B1 (fr) 2020-02-06 2021-02-01 Élément de sécurité présentant des encres d'impression transparentes lors de l'éclairage par rayonnement électromagnétique dans la plage de longueur d'onde infrarouge

Country Status (3)

Country Link
EP (1) EP3862190B1 (fr)
CN (1) CN113212028B (fr)
DE (1) DE102020000790A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025002713A1 (fr) * 2023-06-26 2025-01-02 Giesecke+Devrient Currency Technology Gmbh Élément de sécurité pour documents de valeur et autres documents

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021000892A1 (de) 2021-02-19 2022-08-25 Giesecke+Devrient Currency Technology Gmbh Sicherheitselement mit bei IR-Beleuchtung transparenten Druckfarben und einem maschinenlesbaren Merkmal
TWI851052B (zh) * 2023-03-01 2024-08-01 山水彩色印刷股份有限公司 冷燙半色調之紅外線隱藏式防偽印刷方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19907697A1 (de) * 1999-02-23 2000-08-24 Giesecke & Devrient Gmbh Wertdokument
DE102008049595A1 (de) 2008-09-30 2010-04-01 Merck Patent Gmbh Infrarotabsorbierende Druckfarben

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2011100778B4 (en) * 2011-06-29 2011-10-13 Ccl Secure Pty Ltd Improvements in security devices incorporating colour shifting inks
BR112015027570A2 (pt) * 2013-05-01 2017-09-19 Sicpa Holding Sa Elementos de segurança exibindo um movimento visual dinâmico
DE102017106721A1 (de) * 2017-03-29 2018-10-04 Leonhard Kurz Stiftung & Co. Kg Verfahren zum Herstellen einer Mehrschichtfolie und eine Mehrschichtfolie sowie ein Sicherheitselement und ein Sicherheitsdokument

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19907697A1 (de) * 1999-02-23 2000-08-24 Giesecke & Devrient Gmbh Wertdokument
DE102008049595A1 (de) 2008-09-30 2010-04-01 Merck Patent Gmbh Infrarotabsorbierende Druckfarben

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025002713A1 (fr) * 2023-06-26 2025-01-02 Giesecke+Devrient Currency Technology Gmbh Élément de sécurité pour documents de valeur et autres documents

Also Published As

Publication number Publication date
DE102020000790A1 (de) 2021-08-12
CN113212028B (zh) 2022-11-15
CN113212028A (zh) 2021-08-06
EP3862190B1 (fr) 2022-11-16

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