EP3212429A1 - Security element having a color-tilting thin-layer element - Google Patents
Security element having a color-tilting thin-layer elementInfo
- Publication number
- EP3212429A1 EP3212429A1 EP15790459.0A EP15790459A EP3212429A1 EP 3212429 A1 EP3212429 A1 EP 3212429A1 EP 15790459 A EP15790459 A EP 15790459A EP 3212429 A1 EP3212429 A1 EP 3212429A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- recesses
- metallization
- layer
- security
- thin
- 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
- 238000001465 metallisation Methods 0.000 claims abstract description 65
- 239000010409 thin film Substances 0.000 claims description 45
- 239000004922 lacquer Substances 0.000 claims description 42
- 238000004049 embossing Methods 0.000 claims description 36
- 125000006850 spacer group Chemical group 0.000 claims description 18
- 238000005406 washing Methods 0.000 claims description 16
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- 239000006096 absorbing agent Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 8
- 230000001419 dependent effect Effects 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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
- B42D15/00—Printed matter of special format or style not otherwise provided for
Definitions
- the invention relates to a security element with a color-shifting thin-film element for securing valuables.
- the invention also relates to a method for producing such a security element and a data carrier with such a security element.
- Data carriers such as security documents or other valuables, such as branded articles, are often provided with security elements for the purpose of security, which permit verification of the authenticity of the data carriers and at the same time serve as protection against unauthorized reproduction.
- Security elements with viewing-angle-dependent effects play a special role in the authentication of authenticity since they can not be reproduced even with the most modern copying machines.
- the security elements are in this case equipped with optically variable elements, which give the viewer a different image impression under different viewing angles and, for example, show a different color or brightness impression and / or another graphic motif depending on the viewing angle.
- the color flip effect in such thin-film elements is based on viewing angle-dependent interference effects due to multiple reflections in the different sub-layers of the element.
- the path difference of the light reflected at the different layers depends on the one hand on the optical thickness of a dielectric spacer layer, which determines the distance between a semi-transparent absorber layer and a reflective layer, and on the other hand varies with the respective Viewing angle. Since the path difference is on the order of the wavelength of the visible light, the result is an angle-dependent color impression for the viewer due to the extinction and amplification of certain wavelengths.
- the object of the invention is to provide a security element of the type mentioned above with high security against forgery and an attractive visual appearance.
- Security element for securing valuables with a carrier, a metallization arranged above the carrier with first recesses in the form of patterns, characters or a coding, and a thin-film element arranged over the metallization, the second recesses in FIG Form of patterns, characters or a coding in which at least partially the metallization is visible.
- Security element according to paragraph 1 characterized in that the first and second recesses are complementary or related information.
- Security element according to paragraph 1 or 2 characterized in that the security element is transparent or translucent in the areas of the first recesses. 4.
- a security element according to at least one of paragraphs 1 to 3, characterized in that the metallization is formed by an opaque or a semi-transparent metal layer, preferably by an opaque or semi-transparent aluminum layer. 5.
- a security element according to at least one of paragraphs 1 to 4, characterized in that the thin-film element has a reflection layer arranged above the metallization, a dielectric spacer layer arranged above the reflection view and an absorber layer arranged above the dielectric spacer layer.
- a security element according to at least one of paragraphs 1 to 5, characterized in that the metallization and the reflection layer of the thin-film element of the same material, preferably of aluminum, are formed.
- a security element according to at least one of the paragraphs 1 to 6, characterized in that between the carrier and the metallization an embossing lacquer layer is arranged with an embossed relief structure, wherein the relief structure in particular a diffrak tive structure, such as a hologram, represents a holographic grating image or a hologram-like diffraction structure, an achromatic structure, such as a matt structure, a micromirror arrangement, a blade grating with a sawtooth-like groove profile or a Fresnel lens arrangement.
- a diffrak tive structure such as a hologram
- the embossing lacquer layer partially has an embossed relief structure
- the first recesses in the metallization are arranged in a region in which the embossing lacquer layer does not have an embossed relief structure (or optionally additionally a recess in the embossed relief structure);
- the second recesses are arranged in the color-shifting thin-film element in a region in which the embossing lacquer layer has an embossed relief structure.
- a security element according to at least one of paragraphs 1 to 8, characterized in that the security element, a security thread, a tear thread, a security tape, a security strip, a patch or label for application to a security paper, document of value or the like is.
- the full-surface application of the color-shifting thin-film element in particular the full-surface application of a dielectric spacer layer, followed by a full-surface application of an absorber layer, wherein optionally before the step of applying the entire surface of the dielectric the spacer layer, the full-surface application of a reflective layer can be performed;
- a security element for safeguarding valuables comprises a carrier and a metallization arranged above the carrier with first recesses in the form of patterns, characters or a code.
- a thin-film thin-film element is arranged, which has second recesses in the form of patterns, characters or a coding, in which at least partially the metallization is visible.
- the metallization does not have to be directly on the carrier, but there may be one or more intermediate layers between the carrier and the metallization, for example the embossing lacquer layer mentioned below.
- the surface-tilting thin-film element is preferably arranged directly, ie without intermediate layers, on the metallization.
- the first and second recesses are complementary or related information, so as to closely interlock the recessed areas.
- the security element is advantageously transparent or translucent.
- the metallization is preferably formed by an opaque or a semi-transparent metal layer, preferably by an opaque or a semi-transparent aluminum layer.
- an opaque or a semi-transparent metal layer preferably by an opaque or a semi-transparent aluminum layer.
- other metals such as silver, nickel, copper, iron, chromium, or gold come into consideration for the metallization.
- the thin-film element has a reflection layer arranged above the metallization, a dielectric spacer layer arranged above the reflection view, and an absorber layer arranged above the dielectric spacer layer.
- the metallization and the reflection layer of the thin-film element may be formed of different materials, but in an advantageous embodiment the metallization and the reflection layer of the thin-film element are formed from the same material, preferably aluminum.
- an embossing lacquer layer with an embossed relief structure is arranged between the carrier and the metallization.
- the relief structure may in particular be a diffractive structure, such as a hologram, a holographic lattice image or a holo-image.
- grarnmä Canale diffraction structure or also an achromatic structure, such as a matte structure, a micromirror arrangement, a blade grid with a sawtooth-like furrow profile or Fresnellinsen- arrangement.
- the security element is advantageously a security thread, a tear thread, a security tape, a security strip, a patch or a label for application to a security paper, document of value or the like.
- the invention also includes a method for producing a security element of the type described above, in which on a support, optionally via one or more intermediate layers, a metallization with first recesses in the form of patterns, characters or a coding is applied, and in which the metallization, a color-shifting thin-film element is applied with second recesses in the form of patterns, characters or a coding, so that in the second recesses at least partially the metallization is visible.
- a soluble washing ink in the form of the desired first recesses is printed to produce the first recesses.
- the wash ink is washed off after applying the metallization and the thin-film element together with these by a solvent.
- the invention also includes a data carrier with a security element of the type described above.
- the data carrier may be a value document, such as a banknote, in particular a paper banknote, a polymer banknote or a film composite banknote, a share, a bond, a document, a security document Voucher, a check, a high-quality ticket, but also to act as an identification card, such as a credit card, a bank card, a cash card, an authorization card, an identity card or pass personalization page.
- the security element is arranged at least in a partial area in or over a window area or a continuous opening of the data carrier.
- FIG. 1 is a schematic representation of a banknote with a security element according to the invention in the form of a security thread
- Fig. 2 is a plan view of a portion of the security thread of 3 shows a cross section through the security thread of Fig. 2 along the line III-III,
- FIG. 4 shows a cross section as in FIG. 3 for a security thread according to another exemplary embodiment of the invention, FIG.
- Fig. 5 shows another embodiment of an inventive
- FIG. 1 shows a schematic representation of a banknote 10, which is provided with a security element according to the invention in the form of a security thread 12.
- security threads and banknotes can be used with all types of security elements, such as labels on goods and packaging or in the security of documents, ID cards, passports, credit cards, health cards and the like.
- broad security strips or transfer elements can also be considered.
- FIGS. 2 and 3 show a plan view of a portion of the security thread 12
- Fig. 3 shows a section through the security thread 12 along the line III-III of Fig. 2 represents.
- the security thread 12 has a carrier 20 in the form of a transparent plastic film, for example a PET film.
- a metallization 22 in the form of an opaque Alurruniurn Mrs applied, which is provided with first recesses 24 in the form of the letter sequence "text", which is representative of any letter or string.
- a thin-film element 30 with a color-shift effect comprising a partially transparent absorber layer 32 of chromium, a dielectric S1O2 spacer layer 34, and a reflection layer 36 formed by an opaque aluminum layer.
- the aluminum reflection layer 36 is applied directly to the opaque aluminum layer of the metallization 22.
- the thin-film element 30 has second recesses 38 in the form of the number sequence "200", which represents the denomination of the banknote 10.
- the security thread 12 is transparent and exposes the underlying areas of the banknote 10. If the security thread 12 is applied with one or more of the recesses 24 over an opening or a window area 14 (FIG. 1) of the banknote, then a see-through area is created in the banknote 10.
- both the metallization 22 and the reflection layer 36 of the thin-film element 30 are each formed by an aluminum layer, but it is also possible to use different metals, in particular differently colored metals, for example copper for the metallization 22 and aluminum for the reflection layer 36.
- a print layer in the form of the desired first recesses 24 is printed on a transparent PET film 20, for example, first with a wash ink, and the film printed with wash ink is steam-coated over its full surface with an aluminum layer 22.
- a print layer in the form of the desired second recesses 38 is printed on the aluminum layer 22 again with a wash ink and the film again printed with wash ink is vaporized in this order with the aluminum reflective layer 36, the S1O2 spacer layer 34 and the chromium absorber layer 32 , Subsequently, in a demetallization step, the imprinted wash ink areas are washed off together with the respectively overlying layer areas, thereby producing the desired recesses 24, 38 in the metallization 22 and the thin-film element 30.
- FIG. 4 shows, as a further embodiment of the invention, a color-shift hologram in which the above-mentioned visual appearances are combined with an embossed hologram.
- the security thread 40 of FIG. 4 has the same basic structure as the security thread 12 of FIGS. 2 and 3 except for the embossed lacquer layer 42.
- the security thread 40 includes a carrier 20 in the form of a transparent plastic film with a UV lacquer layer 42, the was embossed and hardened after application with a relief 44 in the form of the desired hologram.
- the UV lacquer layer 42 is provided with a metallization 46 in the form of an opaque copper layer which has first recesses 24 in the form of patterns, characters or an encoding.
- a thin-film element 30 with a color-shift effect is arranged which, in particular, may be designed like the thin-film element of FIG.
- the thin-film element 30 is provided with second recesses 38 in the form of patterns, characters or an encoding.
- the security thread 12 When viewing the security thread 40, three different visual appearances can be seen.
- the security thread 12 In the first recesses 24 of the metallization 22, the security thread 12 is transparent and exposes the underlying areas of the banknote 10.
- the embossed into the lacquer layer 42 relief structure 44 forms, together with the metallization 46, a copper-colored hologram, which is visible in the second recesses 38 of the thin-film element 30.
- Recesses 24 generates the relief of the lacquer layer 42 because of the lack of contrast contrast no visible diffraction effects.
- FIG. 5 shows a further exemplary embodiment of the security thread according to the invention.
- the carrier 20 has an embossing lacquer layer 42, which is only partially provided with an embossed relief structure.
- On the embossing lacquer are a metallization 46, a dielectric spacer layer 34 and an absorber layer 32.
- An additional reflective layer may optionally be provided between the metallization 46 and the dielectric spacer layer 34.
- the metallization 46 has first recesses in the region of the embossing lacquer layer in which the embossing lacquer layer is not provided with an embossed relief structure (or additionally first recesses in the region of the embossing lacquer layer with an embossed relief structure).
- the layers forming the ink-jet thin-film element, ie the dielectric spacer layer 34 and the absorber layer 23, have second recesses in the region of the embossing lacquer layer in which the embossing lacquer layer is provided with an embossed relief structure. In the layer structure shown in FIG.
- a transparent region "A” (so-called “clear text region") formed by the first recesses is recognizable to the viewer.
- the observer recognizes a metallic, textured area "B”, eg a hologram area formed by the relief metallization,
- the observer recognizes two different color-shifting areas "C” and "D", one of them fbrowning region "C” is arranged in the region of the embossing lacquer layer in which the embossing lacquer has no relief structure, and the further farbkip- pende region "D” is disposed in the region of the embossing lacquer in which the embossing lacquer layer is provided with a relief structure
- the hologram area can vary depending on the use of a water-soluble wash color (see in the above summary of the invention in paragraph 13 step b)) for the first recess b) have a transparent recess
- the security element according to the invention can additionally be equipped with magnetic and / or fluorescent security features.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014016027 | 2014-10-29 | ||
DE102015003185.6A DE102015003185A1 (en) | 2014-10-29 | 2015-03-12 | Security element with color-shifting thin-film element |
PCT/EP2015/002142 WO2016066263A1 (en) | 2014-10-29 | 2015-10-28 | Security element having a color-tilting thin-layer element |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3212429A1 true EP3212429A1 (en) | 2017-09-06 |
EP3212429B1 EP3212429B1 (en) | 2020-04-29 |
Family
ID=55753801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15790459.0A Active EP3212429B1 (en) | 2014-10-29 | 2015-10-28 | Security element having a color-tilting thin-layer element |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3212429B1 (en) |
DE (1) | DE102015003185A1 (en) |
WO (1) | WO2016066263A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022033653A1 (en) * | 2020-08-14 | 2022-02-17 | Giesecke+Devrient Currency Technology Gmbh | Elongate security element and method for producing an elongate security element |
CN114905881B (en) * | 2021-02-10 | 2023-08-22 | 中钞特种防伪科技有限公司 | Security element, method for producing the same, and security product |
DE102022002765A1 (en) | 2022-07-29 | 2024-02-01 | Giesecke+Devrient Currency Technology Gmbh | Security element and value document equipped with the security element |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2470996C (en) * | 2001-12-21 | 2012-04-10 | Giesecke & Devrient Gmbh | Security element and methods for producing it |
DE10202035B4 (en) * | 2002-01-18 | 2018-10-18 | Giesecke+Devrient Currency Technology Gmbh | Security element with color shift effect and magnetic properties, article with such a security element and method for producing the security element and the article. |
DE10218897A1 (en) * | 2002-04-26 | 2003-11-06 | Giesecke & Devrient Gmbh | Security element and process for its manufacture |
DE102007061828A1 (en) * | 2007-12-20 | 2009-06-25 | Giesecke & Devrient Gmbh | Security element and method for its production |
WO2012143746A1 (en) * | 2011-04-21 | 2012-10-26 | ALTSHULER, Vladimir | Security label (versions), method of forming a security label and method of product authentication (versions) |
-
2015
- 2015-03-12 DE DE102015003185.6A patent/DE102015003185A1/en not_active Withdrawn
- 2015-10-28 EP EP15790459.0A patent/EP3212429B1/en active Active
- 2015-10-28 WO PCT/EP2015/002142 patent/WO2016066263A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
DE102015003185A1 (en) | 2016-05-04 |
WO2016066263A1 (en) | 2016-05-06 |
EP3212429B1 (en) | 2020-04-29 |
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