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
  • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
  • B42D25/373—Metallic materials
• • 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
• • 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
  • B42D25/369—Magnetised or magnetisable materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—Identification or security features, e.g. for preventing forgery
  • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
  • B42D25/378—Special inks
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—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

Definitions

• the invention relates to a security element for a document of value, for example for packaging, tax stamps, a bank note or a passport, the security element having a substrate with a front and a back, with an observer viewing the substrate of the security element in a plan view from the front.
• 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 intrinsically has a dark or black hue.
• a second printing ink is arranged in the viewing direction between the viewer and the first printing ink, which is translucent or preferably transparent in the infrared wavelength range of electromagnetic radiation and is translucent or preferably transparent in the visible wavelength range of electromagnetic radiation and has a white hue per se.
• the first and the second printing ink are arranged one above the other in at least one overlapping area, so that a silver hue results for the viewer in the at least one overlapping area in the visible wavelength range of electromagnetic radiation.
• Such a security element is off DE 10 2020 000 790 known.
• a security feature of the lowest security level (level 1) is immediately visible to an observer with the human eye, to be recognized by the ear or by touch. This is, for example, a security feature with optically variable properties, diffractive structures or holograms, tactile printing elements in the paper substrate of a banknote, or the special acoustic properties of a paper substrate of a banknote.
• a security feature of the higher and highest security level (Level 2 and Level 3) can only be recognized or read using special methods, for example by means of electromagnetic radiation in the infrared (IR), ultraviolet (UV) or terahertz wavelength range. In particular, it is not directly recognizable for an observer with the human eye, acoustically with the ear or haptically by feeling, but only by means of special machines. It is therefore also referred to as a machine-readable security feature.
• a security feature of the highest security level is, for example, a powder made of certain rare earths that is applied to or incorporated into a substrate and is known, for example, under the brand names M-Feature ® or Anti Piracy Technology (APT) ® . It can only be detected using special machines that have sensors for electromagnetic radiation in the infrared wavelength range and that are only available to central banks.
• the invention is based on the object of further developing a generic security element in such a way that protection against forgery is further increased.
• a security feature that is machine-readable is introduced into the first and/or second printing ink and/or between the first and second printing ink.
• Such a security feature is also referred to as a machine-readable security feature.
• a DE 10 2020 000 790 known IR-transparent silver ink has a machine-readable security feature in one or both printing inks and/or a security feature is introduced between the first and second printing ink.
• a particular advantage of the invention is the machine-readability or readability of Level 3 security features in the silver color, for example using a hand-held scanner, such as that shown in FIG WO 2020/182334 A1 is known. This increases the protection against counterfeiting of, for example, tax stamps, packaging, etc. to a considerable extent.
• a machine-readable security feature for example of the highest security level (level 3)
• level 3 the highest security level
• a machine-readable security feature particularly preferably has machine-readable feature substances that are introduced or mixed into the first and/or second printing ink.
• Machine-readable feature substances are preferably IR-absorbing, IR-transparent, magnetic, electrically conductive and/or luminescent, in particular phosphorescent, feature substances are used.
• the security feature which is machine-readable, can be recognized by means of special machines that have sensors for electromagnetic radiation in the infrared wavelength range.
• Machine-readable feature substances are particularly preferably transparent in the visible spectral range, such as transparent IR absorbers, transparent organic conductive substances or transparent magnetic materials. These feature substances can be used in the first and/or second printing ink through which the viewer has to look. They can be used to impart machine-readable properties to the security element without impairing or changing the visual appearance. Colored, machine-readable feature substances can also be used and thereby contribute in a targeted manner to the overall color effect of the security element.
• Suitable machine-readable IR substances are given in the publication WO 2007/060133 A1 specified.
• iron (II) and copper (II) compounds with an Fe 2+ ion or a Cu 2+ ion in a suitable chemical environment are suitable, a suitable chemical environment being, for example, a phosphate ion or a polyphosphate ion or, more generally , is a phosphorus and oxygen containing group.
• These IR substances which absorb broadband in the NIR range (700 nm to 1100 nm), are transparent in the visible range (400 nm to 700 nm) of the electromagnetic spectrum, with at most a slightly yellowish or bluish tint.
• Particularly suitable machine-readable IR substances are the pigments sold by SICPA (SICPA SA, Ave de Florian 41, 1008 Prilly, Switzerland) and the printing inks sold under the trade name SICPATALK, such as SICPATALK® CBA and SICPATALK® NFB.
• SICPATALK® CBA exhibits broadband absorption above 1100 nm
• SICPATALK ® NFB exhibits broadband absorption centered between 950 nm and 980 nm.
• a machine-readable feature substance can also be formed by a security feature of the highest security level in the form of certain rare earths, which are introduced or mixed into the first and/or second printing ink, for example, as a powder and whose presence can be detected with special sensors.
• Another suitable machine-readable security feature consists of a metallic layer with longitudinal slots that are transparent to THz radiation.
• the longitudinal slits can be arranged (quasi-)periodically with a period of 8 ⁇ m to 200 ⁇ m, preferably 10 ⁇ m to 100 ⁇ m, and have a width that is less than 1/5, preferably less than 1/10 of the period.
• This metallic layer with longitudinal slits, which are transparent to THz radiation, is particularly preferably arranged between the first and second printing ink.
• the machine-readable security element contains an authenticity feature with two or more different machine-readable feature substances, in particular an authenticity feature with two or more IR-absorbing feature substances that absorb in different IR wavelength ranges, an authenticity feature with two or more magnetic feature substances with different magnetic properties, in particular different coercivity, or an authenticity feature with two or more luminescent feature substances which luminesce with different emission spectrums or can be excited at different wavelengths.
• an authenticity feature with two or more different machine-readable feature substances in particular an authenticity feature with two or more IR-absorbing feature substances that absorb in different IR wavelength ranges
• an authenticity feature with two or more magnetic feature substances with different magnetic properties, in particular different coercivity or an authenticity feature with two or more luminescent feature substances which luminesce with different emission spectrums or can be excited at different wavelengths.
• the use of several different feature substances increases both the code density and the security of the element against forgery.
• the two or more different feature substances are advantageously provided in the first and/or second printing color next to one another, one above the other, adjoining one another or overlapping in different partial areas.
• machine-readable feature substances of different types, for example an IR-absorbing feature substance and a magnetic feature substance, can also be combined.
• At least one machine-readable feature substance is expediently present in a printing ink, in particular a pigment printing ink.
• at least one machine-readable feature substance is expediently present in a vapor-deposited layer.
• a magnetic metal can be evaporated as a reflection-enhancing coating or as part of such a coating to form a machine-readable authenticating feature.
• first or second printing ink "per se” has a dark or black or white hue means, within the meaning of this invention, that the respective printing ink taken by itself, i.e. without interaction with another printing ink, has this hue having. So it would only be the first or second printing color placed on the substrate, the first or second ink would have that hue.
• two printing inks that are transparent to IR radiation are combined with one another, with the first printing ink being opaque and the second printing ink being translucent in the visible wavelength range, and the second printing ink with the white hue being applied over the dark or black first printing ink in the viewing direction.
• the combination of the two printing colors results in a silver color tone for the observer in the overlapping area.
• the first printing color can be arranged on the front side of the substrate of the security element and the second color can be arranged over the first printing color.
• both printing colors 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 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 translucent at least in partial areas of the visible and infrared wavelength range of electromagnetic radiation preferably transparent, wherein the first ink is arranged on the back of the substrate of the security element and the second color is arranged between the first color and the substrate of the security element.
• the first and the second printing ink can be seen and recognized from the front side of the substrate through the translucent or preferably transparent substrate.
• the first printing ink is particularly preferably applied to the substrate of the security element with an application quantity of approximately 1 g/m 2 to approximately 3 g/m 2 and the second printing ink with an application quantity of approximately 2 g/m 2 to approximately 8 g/m 2 .
• the rule here is that the greater the application quantity and thus the layer thickness of the second printing color selected, the lighter the security element appears in the visible wavelength range. Conversely, the lower the application quantity and thus the layer thickness of the second printing color selected, the darker the security element appears in the visible wavelength range. With an application quantity of the second printing color of approximately 2 g/m 2 , the security element thus appears darker than with an application quantity of the second printing color of approximately 8 g/m 2 .
• the first printing ink is, for example, the printing ink EP-92988 (SCHV 026) IR-Black from the Swiss company ROTOFLEX. It has the following properties: good hiding power with a sufficiently high layer thickness 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 front and reverse printing, suitable for external printing together with a waterproof protective varnish, low residual solvents, main binders are cellulose nitrate and polyurethane, contains no chlorinated binders such as PVC or PVdC.
• VIS visible range
• main binders are cellulose nitrate and polyurethane, contains no chlorinated binders such as PVC or PVdC.
• Electromagnetic in the visible wavelength range Radiation this ink appears dark to black when viewed from above, ie when illuminated from the front and viewed from the front, and dark green when viewed through, ie when illuminated from the back and viewed from the front, and black when applied in large quantities.
• the second printing ink is, for example, the printing ink EP-92088 (SLV 054) IR lacquer from the Swiss company ROTOFLEX. It has the following properties: Silver gloss effect with a high layer thickness due 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 reverse printing, suitable for external printing together with a waterproof protective varnish, low residual solvents, main binders are cellulose nitrate and polyurethane, does not contain any chlorinated binders such as PVC or PVdC. In the visible wavelength range of electromagnetic radiation, this printing ink appears white or white-silver shimmering 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 seen 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 code. 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 are possible, which are covered by one or both printing inks and are only recognizable under IR observation.
• first and/or second printing ink can also be designed in the form of a text, character, pattern or code 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 of polyethylene terephthalate (PET), for example.
• 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 value document can have a substrate and the substrate of the security element is the substrate of the value document.
• the security element does not have its own substrate, but the first printing ink is printed onto 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 using 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 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 test devices (such as an IR camera), since when illuminated with electromagnetic radiation in the infrared wavelength range, the first and second printing ink 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 lying behind it to shine through in the viewing direction.
• Level 2 features e.g. UV short- and long-wave fluorescence, IR transparency and visibility, anti-Stokes
• the security element according to the invention can also have further printing features, such as fluorescence (over the entire surface, in the form of stripes, monochromatic, multicolored).
• the combination of the first and/or second printing ink with metallization (Al, Cr, Cu, Ni, etc.) or with pigmented metallic printing inks or with magnetic printing inks is also possible.
• first and second printing inks used according to the invention which have poor resistance to solvents, acids, alkalis and/or bleaches, for example, can increase security against tampering as a supplement to chemical security of the substrate or paper.
• the texts, patterns, signs, codes or other elements applied to the substrate can also consist of an IR-translucent or - transparent and IR-absorbing printing ink, which, arranged next to each other, produces a different pattern when illuminated with electromagnetic radiation in the infrared wavelength range.
• the IR translucent or transparent inks can also have fluorescent properties.
• the printing inks are visible when illuminated with visible electromagnetic radiation, are invisible when illuminated with electromagnetic radiation in the infrared wavelength range and fluoresce when illuminated with electromagnetic radiation in the ultraviolet wavelength range.
• the IR-translucent or transparent printing inks can also have a different hue under UV light, so that a pattern can be seen when illuminated with visible electromagnetic radiation, for example a star which, when illuminated with UV light, has a pattern of two or more fluorescent colors can be recognized.
• the second printing ink can also be additionally colored with other dyes, so that an overall golden hue is obtained, for example by adding a yellow dye.
• 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 to pass through to the other side of the object and enters out there again. The greater the percentage of the electromagnetic radiation of a wavelength range that passes through, based on 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 the object allows the impinging electromagnetic radiation of a wavelength range to pass through almost unattenuated, the object is referred to as being transparent for this wavelength range.
• an object that allows less than 10% and preferably about 0% of the impinging 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 impinging electromagnetic radiation of a wavelength range, is classified as opaque or referred to as not transparent to electromagnetic radiation in this wavelength range.
• the substrate particularly preferably consists of paper, paperboard or cardboard made from cellulose fibers or a mixture of cellulose fibers and cotton fibers.
• Cardboard usually has a weight (grammage) of 150 g/m 2 to 300 g/m 2 .
• the substrate can particularly preferably consist of paper made of cotton fibers, such as is used for banknotes, or of other natural fibers or of synthetic fibers or a mixture of natural and synthetic fibers, or of at least one plastic film.
• the substrate preferably consists of a combination of at least two different substrates arranged one above the other and connected to one another, a so-called hybrid.
• the substrate consists, for example, of a combination of plastic film-paper-plastic film, ie a substrate made of paper is covered on each of its two sides by a plastic film, or of a combination of paper-plastic film-paper, ie a substrate made of a plastic film is covered on each of its covered with paper on both sides.
• Information on the weight of the substrate used is given, for example, in the document DE 102 43 653 A9 given, whose statements in this regard are fully included in this application.
• the font DE 102 43 653 A9 states in particular that the paper layer usually has a weight of from 50 g/m 2 to 100 g/m 2 , preferably from 80 g/m 2 to 90 g/m 2 . Depending on the application, any other suitable weight can of course be used.
• Documents of value for which such a substrate or security paper can be used are, in particular, banknotes, stocks, bonds, certificates, vouchers, cheques, high-quality admission tickets, but also other papers at risk of forgery, such as passports and other identification documents, and cards, such as credit or debit cards whose card body has at least one layer of security paper, and also product security elements such as labels, seals, packaging, folding boxes, package inserts and the like.
• the simplified term document of value includes all of the above materials, documents and product security means.
• front or “back” of the substrate or document of value are relative terms that can also be referred to as “the one” and “the opposite” side and that form the majority of the total surface area of the substrate or document of value. These terms expressly do not include the side surfaces of a substrate or document of value, which are negligibly small given a substrate or document of value that is only about one millimeter in the case of card bodies or only fractions of a millimeter in the case of banknotes, and are usually not provided with security elements or coatings become or can become. In particular, no see-through effects can be achieved with the side surfaces.

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Citations (6)

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• 2021
  • 2021-02-19 DE DE102021000892.8A patent/DE102021000892A1/de not_active Withdrawn
• 2022
  • 2022-02-17 EP EP22020063.8A patent/EP4067108A1/fr active Pending

Patent Citations (6)

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