EP2817155B1 - Procede avec alignement entre un element d'impression et un filigrane - Google Patents

Procede avec alignement entre un element d'impression et un filigrane Download PDF

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Publication number
EP2817155B1
EP2817155B1 EP13705397.1A EP13705397A EP2817155B1 EP 2817155 B1 EP2817155 B1 EP 2817155B1 EP 13705397 A EP13705397 A EP 13705397A EP 2817155 B1 EP2817155 B1 EP 2817155B1
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EP
European Patent Office
Prior art keywords
substrate
watermark
radiation
printed element
opacity
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.)
Not-in-force
Application number
EP13705397.1A
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German (de)
English (en)
Other versions
EP2817155A1 (fr
Inventor
Peter SCHIFFMAN
Harald Reiner
Angelika KECK-ANGERER
Jana Kisselova
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and Devrient GmbH
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Filing date
Publication date
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Publication of EP2817155A1 publication Critical patent/EP2817155A1/fr
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Publication of EP2817155B1 publication Critical patent/EP2817155B1/fr
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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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/41—Marking using electromagnetic radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/10—Watermarks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • 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
    • B42D25/333—Watermarks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/008—Sequential or multiple printing, e.g. on previously printed background; Mirror printing; Recto-verso printing; using a combination of different printing techniques; Printing of patterns visible in reflection and by transparency; by superposing printed artifacts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B42D2033/10—
    • B42D2033/16—
    • B42D2033/20—
    • B42D2035/20—
    • 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
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light

Definitions

  • the invention relates to a method for producing a security element, wherein a substrate is provided which has a front and a back, at least for certain radiation is translucent and has a watermark, which modulates the opacity of the substrate, and applied to the front of a printing element becomes.
  • watermarks are known. They are usually introduced in the production of the substrate from which the security element is made, usually a paper. Watermarks are easily recognizable when the security element is viewed through transmitted light, since they modify the opacity of the substrate. As a rule, in the production of the paper, the thickness of the substrate is varied, so that a reduction in thickness leads to an opacity reduction.
  • watermark colors which also locally modify the opacity of the substrate.
  • watermarks are usually formed in the substrate in the production of the starting material for the security element, for example in the production of a banknote paper, it is fundamentally difficult in later printing to arrange printed elements in an exact position relative to the watermark, that is to pass. This problem arises regardless of the specific design of the printing element, not only when printing with different inks, but also during coating or application with printing elements, when applying transfer films or laminating or when applying a window suture.
  • paper sheets Due to variations in the cutting process of a paper substrate, paper sheets usually have variations in the position of the watermark, which are in the millimeter range. In a printing process, additional register variations are added due to variations in placement positions, transfer variations in printing presses, paper moisture swings and a swaging effect of the paper in stitching.
  • a method for producing a security element is known from EP 2 199 095 known.
  • the invention is therefore an object of the invention to provide a method by which a printing element can be structured in the register to a watermark without previously determined the location of the watermark precisely and the printing system must be adapted to the position of the watermark.
  • the invention is based on the recognition that the energy of radiation is attenuated by the substrate.
  • the more opaque the substrate the stronger the weakening. Therefore, advantage is taken of the property of the watermark to modulate the opacity of the substrate.
  • the watermark is used as a mask for a modification of the printing element by using a printing element that is modifiable by certain radiation for which the substrate is translucent, and that certain radiation from the back of the substrate to the front side on which the printing element Watermark is applied overlapping, is irradiated. This is done, masked by the watermark, a modification of the printing element, which automatically lies in the perfect register to the watermark.
  • a modification of the pressure element is in particular an ablation in question when a pressure element is used, which is ablatierbar.
  • a pressure element which is ablatierbar.
  • any suitable modification of a printing element can be used.
  • This modification can be done directly, ie by direct action of the particular radiation on the printing element, or indirectly.
  • the particular radiation modifies an element which in turn is used to modify the pressure element, that at the front is perceptible.
  • a layer can be modified which influences the adhesion of the pressure element on the front side.
  • the printing element is then removed in the areas in which the layer has been modified (or not modified in the inverse case).
  • wash color is similar to the principle of the so-called wash color.
  • a further possibility for indirect modification is the modification of a developer layer which, in interaction with a developer or fixing medium, modifies the printing element at those points at which the developer layer has been suitably exposed.
  • Indirect influencing of the printing element is also possible in a two-stage process if the printing element has an adhesive layer which is applied to the front side and exposed from the rear side with the participation of the watermark as a mask.
  • a color layer of the printing element can then be applied, which adheres only to those places where the exposure took place.
  • the exposed adhesive layer can also be acted upon here in an intermediate step so that it remains only in those areas in which a suitable exposure took place (positive effect) or remains in those areas in which no suitable exposure took place (negative effect).
  • pressure element is understood to mean an element applied to a substrate, which optionally, after further processing, realizes a visually or mechanically evaluable element.
  • printing elements based on printing inks. As far as this description speaks of a printing ink, this is to be understood by way of example for a printing element.
  • printing element or “printing ink” and the application of this printing element is mentioned on the front over the watermark, it is also included that applied by a printing element layer system, only a part of the layer system and is exposed to the specific radiation; the other part is then applied after these steps and interacts with the exposed portion of the layer system to create a printed image in the watermark to the watermark.
  • a multilayer system is z. B. to the effect that the pressure element cooperates with an additional layer whose visual effect depends on the prior modification of the printing element.
  • optically variable layers that they are particularly clearly recognizable on a dark or black background in incident light.
  • An embodiment of the invention therefore provides that the printing element is provided by the specific radiation with a contrast structure.
  • On the thus modified in the Passer to the watermark printing element is then applied surface, ie without Passeran petitionen an optically variable layer, the visual effect due to the precise registration of acting as a background pressure element then automatically in the register to the watermark, although the optically variable layer itself without Passeran petitionen was applied.
  • An example of such an optically variable layer is a liquid crystal layer.
  • EP 0435029 or WO 97/19818 discloses examples of optically variable layers using liquid crystals. The disclosure of these publications is fully incorporated herein with respect to the optically variable layers described therein.
  • pressure element is therefore also understood to mean a multilayer system, wherein a part of the layer system is applied to the front surface before the exposure and then illuminated with the specific irradiation. Another part of the layer system is then applied only after the exposure.
  • watermarks are common, which modulates the opacity of the substrate by varying a thickness of the substrate at a constant density of the substrate, since such watermarks are usually very difficult to emulate.
  • These watermarks are well suited for the printing method according to the invention, which then supplements the appearance of the watermark by further image information, which lies in the register to the watermark. This makes it possible, for example, to add color information provided by the watermark.
  • the image information of the watermark which appears per se only in transmitted light, by means of the invention produced in Passer print image in incident light observation can be seen.
  • a watermark that modulates the opacity of a substrate can also be generated by a so-called watermark color, rather than by varying the thickness of the substrate.
  • the watermark color causes a reduction of the scattering of light in the substrate core. Basically, scattering is due to a large number of interfaces of fibers, fillers, glue, etc. to the surrounding air. These ambient airborne interfaces are significantly reduced by suitable binder components in the watermark ink, thus decreasing opacity in these areas.
  • a binder component is, for example, glycerol, which penetrates into the substrate and remains in the pores of the substrate.
  • Watermarks generated by watermark color are also referred to as "spurious" watermarks
  • Watermarks produced by varying the thickness of the substrate while maintaining the density of the substrate are also referred to as "true” watermarks.
  • the watermark is caused by a coloration which modulates the opacity of the substrate.
  • a watermark can binarise the opacity of a substrate, i. H. it produces a structure which can be seen in the transparency in that the substrate is less opaque or more translucent at individual points.
  • watermarks in the sense of gray scale modulation, which modulate the opacity or the translucency between two maximum values. In the transmitted light view, one then recognizes a grayscale image. Both types of watermarks are equally suitable for the present printing process. In the case of a watermark which is designed in the manner of a gray-scale image, it is, of course, particularly advantageous to use an ink whose modifiability goes beyond a simple threshold modification, the modification of which thus knows more than two states. The multi-level modulation by the watermark is then converted into a corresponding multi-stage modification of the printing element.
  • a particularly finely graded opacity modulation can be achieved by combining a paper thickness modulating "true” watermark with a watermark color generated "spurious" watermark.
  • Printing elements usually consist of binders, auxiliaries, driers or drying accelerators and coloring constituents, such as dyes or pigments.
  • coloring constituents such as dyes or pigments.
  • the particular radiation In order to avoid influences of the particular radiation on other components of the substrate or on the substrate applied coatings as possible, it is preferable to irradiate the particular radiation as narrow as possible in the range of an absorption band of the printing element. This is particularly easy to realize with laser radiation.
  • a pressure element per se has no component making it suitable for ablation, it is preferable to add a certain amount of additive, for example soot, which absorbs the particular radiation to the pressure element for ablation.
  • a certain amount of additive for example soot, which absorbs the particular radiation to the pressure element for ablation.
  • soot absorbs the particular radiation to the pressure element for ablation.
  • the use of an admixture makes it possible, in particular, to select the specific radiation such that it lies in the non-visible spectral range, for example IR radiation, if the admixture increases the absorption coefficient of the pressure element in the corresponding spectral range.
  • the printing ink comprises one or more of the following substances: an optically variable color, a magnetically orientable color, a metallic color, a color which is effective in the non-visible spectral range.
  • the principle according to the invention provides that the printing element and certain radiation are coordinated so that the specific radiation is able to modify the printing element, wherein the watermark which modulates the opacity of the substrate is used as a mask.
  • the term "certain radiation” used in this description therefore expresses that a pressure element is used which is modifiable by means of this radiation.
  • the modification for example in the form of an ablation, is achieved when the particular radiation at the front has a suitable intensity.
  • the opacity modulation caused by the watermark reduces the intensity of the radiation on the front surface on which the printing element is located.
  • the radiation intensity on the back side is therefore adjusted so that the opacity modulation, which is caused by the watermark, leads to a radiation modulation on the front side, which modulates the modification effect on the printing element.
  • the radiation intensity at the backside is chosen so that at the places where the watermark causes the lowest opacity in the substrate, a modification of the printing element occurs at the places where the watermark causes the highest opacity of the substrate, however, no or only a very small modification is achieved. Then the watermark serves as a mask during the irradiation of the substrate with the specific radiation. Since the modification of the printing element usually requires a relatively high radiation intensity, the use of a beam is advantageous, which is rastered over the back of the substrate.
  • the beam may be in the form of a laser beam, for example. It is then not only easy to provide the required radiation intensity, also the intensity adjustment can be done easily, since it is less effort to adjust a beam in its intensity, as to effect a homogeneous intensity adjustment of a fanned light beam.
  • the use of a rasterized beam further has the advantage that the intensity of the particular radiation can be varied in addition to the use of the watermark as a mask to effect additional structuring of the modification of the printing element. This additional modification is of course not in the register for the watermark.
  • the introduction of the modifying radiation, in particular of laser radiation, on the entrance side of the laser radiation ie before the masking effect by the watermark used to effect a visible modification of the substrate, optionally after previous application of a radiation-sensitive layer.
  • a pulsed laser radiation can be used, which already on the entrance side, the substrate, such as paper, modified, for. B. by a blackening or foaming of the substrate.
  • This effect is then clearly visible in transmission.
  • there is advantageously a combination of the watermark, the printing element modified in the register to the watermark, and a visual modification of the surface of the substrate on the entry side of the modifying radiation is advantageously a combination of the watermark, the printing element modified in the register to the watermark, and a visual modification of the surface of the substrate on the entry side of the modifying radiation.
  • this modification on the entrance side of the radiation depends solely on the application of the radiation. This makes it possible, for example, to create a window in which the watermark and the printing element modified in the register are visible.
  • the pressure element to be modulated can contain substances which can be ablated by radiation as well as substances which can be developed by radiation (for example thermochromic substances which preferably have a non-reversible change in color or opacity) and, in addition, substances which can not be ablated or developed by radiation.
  • the last-mentioned substances remain undetached on the substrate or are only partially removed.
  • the pressure element may contain a substance mixture in which the individual components are modified in stages as a function of the impinging energy. For example, a first component at very low opacity and a second component is already ablated at medium opacity.
  • the printing ink contains one EP 1826 728 A2 known laser markable feature substance with core-shell particles, wherein one of the materials of core and shell radiation one of the marking lasers absorbs and the other of the core and shell materials does not absorb the radiation of the marking laser.
  • the core-shell particle contains one EP 1826 730 A2 known UV-excitable organic luminescent substance, wherein the organic luminescent substance forms the core, which is coated with a shell, which increases the chemical and / or physical resistance of the luminescent substance.
  • the printing ink contains one EP 1826 246 A2 known modified iron blue pigment, which is coated with an alkali and / or acid-resistant shell.
  • ink used here stands out for the printing effect achieved by the watermark-masked and radiation-based modification.
  • the printing ink itself can also comprise structures which go beyond conventional color systems, for example a film coating or a metallization.
  • Items to be protected within the scope of this description may include, for example, security papers, identity and value documents (such as banknotes, chip cards, passports, cards, identification cards, identity cards, stocks, bonds, certificates, vouchers, checks, tickets, credit cards, health cards ,. ..) as well as product security elements, such as Labels, seals, packaging, be.
  • identity and value documents such as banknotes, chip cards, passports, cards, identification cards, identity cards, stocks, bonds, certificates, vouchers, checks, tickets, credit cards, health cards ,. ..
  • product security elements such as Labels, seals, packaging, be.
  • security paper is understood here in particular as the precursor to a document of value (eg a card) which, in addition to the printing produced according to the invention, also contains further authenticity features (such as, for example, luminescent substances provided in the volume). can have.
  • value documents here on the one hand from security papers produced documents, eg. B. banknotes understood.
  • value documents can also be other documents and articles which are processed with the printing method according to the invention, so that the value documents have non-copyable authenticity features, whereby an authenticity check is possible and at the same time unwanted copies are prevented.
  • the substrate is particularly preferably made of paper made of cotton fibers, as used for example for banknotes.
  • the substrate may also be made of paper of other natural fibers, also preferably of synthetic fibers, i. a mixture of natural and synthetic fibers.
  • the substrate consists of a combination of at least two superimposed and interconnected different substrates, a so-called hybrid. It may, for example, be a combination of plastic film paper or even a three-layer composite, such as plastic film-paper plastic film, i. a paper substrate is covered on either side by a plastic film, or paper plastic film paper, i. a substrate made of a plastic film is covered on each of its two sides by a paper substrate.
  • the substrate consists of an at least partially transparent plastic film.
  • the watermark is generated in this case by a color which is applied to one side of the substrate and whose hue is at least similar to the hue of the substrate.
  • a watermark is for example off DE 10 2009 056 462 A1 known.
  • the reciprocal property of translucency is opacity. As far as there is talk here that a watermark modulates the opacity, it can equally be said that it inversely modulates the translucency.
  • Fig. 1a shows in a sectional view of a security element 1, wherein for simplicity, only a substrate 2 is drawn.
  • the substrate 2 has a front side 3 (which is arranged below in the figures without further restriction) and a back side 4.
  • a watermark 5 is incorporated, which modulates the thickness of the substrate 2 and thus its opacity.
  • This opacity modulation is in 1b shows which shows a plan view of the front side 3 of the substrate 2 schematically.
  • regions 7 where the thickness is reduced by an average amount
  • the substrate 2 has a medium opacity.
  • the substrate 2 has a low opacity or a high translucency.
  • FIG. 2 shows the substrate 2 with ink 9 applied on the front side 3.
  • the printing ink 9 is (still) not further structured, However, at least partially covers the area in which the watermark 5 is present in the substrate 2.
  • a laser beam 10 is now passed over the substrate. It passes through the substrate 2.
  • the wavelength of the laser beam is such that the ink 9 absorbs the radiation.
  • the laser beam 10 is attenuated depending on the opacity of the substrate 2, which is modulated by the watermark 5.
  • the laser beam 10 is greatly attenuated.
  • the laser beam is least attenuated.
  • Fig. 2 This is schematically illustrated by the thickness of the laser beam 10. In fact, of course, only the intensity of the laser beam 10, but not its radiation cross section when passing through the substrate 2 is attenuated.
  • the intensity of the laser beam 10 is adjusted so as to give a modulation of the ablation effect that the laser beam 10 has on the printing ink 9 applied to the front side 3: in the area 8 with low opacity, the printing ink 9 is ablated a maximum, in areas 7 with medium Opacity, the ink is ablated to a lesser degree, and in areas 6 with maximum opacity, the least or possibly even no ablation occurs.
  • the described embodiment can be modified such that, instead of a watermark which modulates the opacity by a thickness variation of the substrate, a so-called “fake” or “printed” Watermark occurs, that is, a watermark that has been generated on the substrate 2 by a so-called watermark color.
  • the Fig. 3a and 3b schematically show the provision of such a printed watermark.
  • a watermark ink 11 is printed on the back 4 of the substrate 2.
  • the watermark color 11 penetrates according to Fig. 3b into the substrate 2 and causes after drying or other suitable processing, a translucency 12 in the substrate 2 at the points where the watermark ink 11 was printed.
  • the substrate 2 with the printed watermark 12 with the laser beam 10 results in the effect that the laser beam 10 is attenuated less in intensity at positions 10a at which the watermark increases the translucency of the substrate 2 at positions 10b where the watermark does not have this effect.
  • an ablation of the printing ink 9 in the exact register to the watermark is obtained, without the setting of the printing ink 9 having set this register.
  • FIGS. 5a to 5c relate to a third embodiment in which additionally on the front side 3, a non-modifiable by the laser radiation 10 coating 13 has been applied, which is transparent to the laser radiation 10 and thus does not attenuate this.
  • Fig. 5a shows a sectional view similar to the Fig. 2 , wherein now in some areas, the non-modifiable by the laser radiation coating 13 is applied.
  • Fig. 5b shows a plan view of the back 4 with the coating 13th
  • Fig. 5c shows a top view of the front side 3 after irradiation with the laser radiation 10. Due to the different in the watermark opacity of the substrate 2, the ink 9 is influenced to varying degrees by the laser radiation 10, so that the different areas 14,15 and 16 result , In the region 16, the ink 9 is almost unaffected, since the energy of the laser beam is greatly attenuated due to the opacity of the substrate 2. In area 14, ink 9 is modified, eg ablated, due to the average opacity of the substrate 2 due to the average opacity of substrate 2 due to the medium opacity of substrate 2. The laser beam had a strong effect on the printing ink 9 in the region 15, because there substrate 2 had a low opacity and weakened the laser beam only slightly.
  • the described embodiment can also be realized with a watermark that was generated by a watermark color and not by a thickness modulation.
  • a watermark ink is available, for example, from Sun Chemical under the designation 669440 Vernes UVSP (art.No .: JV 40000009).
  • the approaches described here can also be carried out on both sides of a substrate, wherein the ink 9 is then alternately applied to the front and back of the substrate, so that it does not overlap.
  • two different printing inks can be used, which can be modified by radiation of different spectral ranges are. This makes it possible to work with different intensity profiles for these two radiations or to print on the front and back the same area with radiation-modified inks in the register to the watermark.
  • a first ink is applied to the front and a second ink on the back. Subsequently, these inks are exposed and modified by laser radiation from the back (for the ink on the front) or the back (for the ink on the front).
  • a black, soot-based offset color was printed over the area of a watermark.
  • the paint was dried for several days and then ablated by an ND vanadate laser from the back of the color on the front. In areas of low paper thickness, ie maximum translucent watermark, 80% to 95% of the color was thereby removed. In areas of maximum paper thickness, ie minimal Translucency of the watermark was ablated only 10% to 30% of the color.
  • the area of a watermark on the front side was overprinted by means of an OVI screen printing ink WP from the manufacturer SICPA.
  • the paint dried out for several days. Subsequently, the color on the front side was ablated by means of a Nd: Yag laser from the rear side. In areas of low paper thickness, 80% to 95% of the paint was removed. In areas of maximum paper thickness, 10% to 30% of the paint was ablated.
  • the area of a watermark on the front side was overprinted by means of a magnetic OVMI screen printing ink of the manufacturer SICPA.
  • the paint dried out for several days.
  • the color on the front side was ablated by means of a Nd: Yag laser from the rear side. In areas of low paper thickness, 80% to 95% of the color except a yellow colorant was removed. In areas of maximum paper thickness, 10% to 30% of the paint was ablated.
  • the particular radiation is to be chosen so that no absorption of the radiation occurs in the substrate, which would lead to a change in the substrate.
  • Both continuous wave lasers and pulsed lasers are possible for this purpose.
  • An example of a suitable CW laser is the model Innoslab, IS8I-E manufactured by EdgeWave GmbH, which is a Nd: YVO 4 -based laser at a wavelength of 1064 nm. He poses in the CW operation provides 100 watts of power. At a scan speed of 2.5 m / s to 5 m / s, the ablation of a soot-based color can be performed.
  • IR-modifiable color is used as the printing ink, there is the advantage that the printed image and the verification of the register can be machine-based by means of infrared measurement. This color may be visually visible or not visible.
  • the printing method according to the invention is also applicable to a watermark which is provided in connection with a so-called window thread in a substrate of a security element.
  • Fig. 6a shows a plan view in transmitted light on a front side 3 of a substrate 2, which has a window thread 17.
  • a sequence of strip-shaped regions 18 and 19 are provided, which form the watermark: in the regions 18, the thickness of the substrate is unchanged, so that the watermark has a high opacity, and in the regions 19, the thickness of the substrate diminished, so that the watermark has a low opacity (in the embodiment of the FIGS. 6 to 8 is in contrast to the embodiments of the FIGS. 1 to 5 the watermark on the front side 3 of the substrate).
  • Transmitted light is for the purposes of this invention, when an illumination of the substrate takes place from the side opposite to the viewer, ie the Illumination through the substrate takes place.
  • Incident light is in the sense of this invention, when a lighting of the substrate from the side of the viewer is made.
  • ink 9 is now applied to the front side 3.
  • FIGS. 6c and 6d show a section through the substrate 2 of Fig. 6a , where the Fig. 6c shows a section that lies in an area 18, the Fig. 6d a section in an area 19.
  • the thread 17 is below the surface of the front side 3, which is why one of the non-visible portions 21 is here.
  • area 19 is according to Fig. 6d the window thread 17 on the surface of the front side 3, so that a visible portion 21 is formed.
  • Fig. 7 shows the top view of the front 3 after the irradiation of the laser radiation from the back 4 from.
  • the ink 9 is not ablated, there is an area 16 as in Fig. 5c in front.
  • the printing ink 9 is ablated, there is an area 14 in the sense of Fig. 2 in front.
  • Fig. 8 shows a modification in which the laser radiation no ablation, but an inverse modification, for. B. by the development of thermochromic effect pigments causes.
  • the areas 14 and 16 are exactly reversed here.
  • the printing ink 9 is applied to the front or back of the substrate.
  • the decisive factor is that the substrate 2 from the side with the radiation is irradiated, which is opposite to the side on which the ink 9 is arranged.
  • the ink can be provided on the back and the radiation can be coupled from the front.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Toxicology (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Printing Methods (AREA)
  • Credit Cards Or The Like (AREA)

Claims (11)

  1. Procédé de fabrication d'un élément de sécurité (1), cependant que
    - un substrat (2) est mis à disposition , lequel a une face avant et une face arrière (3, 4), est translucide au moins à un rayonnement donné (10) et comporte un filigrane (5) qui module l'opacité du substrat (2),
    - sur la face avant (3), un élément d'impression (9) est appliqué,
    - sur la face avant (3), l'élément d'impression (9) recouvre au moins partiellement le filigrane (5),
    - l'élément d'impression (9) est modifiable au moyen du rayonnement donné (10), et
    - le substrat (2) est traversé depuis la face arrière (4) par le rayonnement donné (10), le filigrane (5) étant, en rapport avec la modification de l'élément d'impression (9), utilisé comme masque, et l'élément d'impression (9) étant modifié dans l'alignement par rapport au filigrane (5),
    caractérisé en ce que
    - le rayonnement donné (10) soumet l'élément d'impression (9) à une ablation pour la modification, et/ou
    - l'élément d'impression (9) est modifié de telle façon au moyen du rayonnement donné (10) qu'il obtient une structure en clair/foncé contrastée, et en ce qu'exclusivement une couche supplémentaire est appliquée, dont l'aspect visuel dépend de la clarté de l'élément d'impression (9) modifié constituant le fond de la couche supplémentaire.
  2. Procédé selon la revendication 1, caractérisé en ce que le filigrane (5) du substrat (2) mis à disposition module l'opacité du substrat (2) par modulation d'une épaisseur du substrat (2).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le filigrane (5) du substrat (2) mis à disposition présente une teinte qui module l'opacité du substrat (2).
  4. Procédé selon une des revendications ci-dessus, caractérisé en ce que, pour l'ablation, l'élément d'impression (9) est pourvu d'un additif absorbant le rayonnement donné (10), par exemple de la suie.
  5. Procédé selon une des revendications ci-dessus, caractérisé en ce que l'élément d'impression est une encre d'impression (9) et comporte en particulier une ou plusieurs des substances suivantes: une encre optiquement variable, une encre optiquement variable magnétiquement orientable, une encre métallique, une encre agissant dans le domaine spectral non visible.
  6. Procédé selon une des revendications de 1 à 4, caractérisé en ce que l'élément d'impression comprend un revêtement, un film de transfert, un film laminé et/ou un fil à fenêtre.
  7. Procédé selon une des revendications ci-dessus, caractérisé en ce que l'élément d'impression (9) comporte en outre des substances qui ne sont ni modifiables, ni aptes à l'ablation au moyen du rayonnement donné (10), et absorbent le rayonnement dans une plage de longueurs d'ondes visible de l'infrarouge et/ou de l'ultraviolet.
  8. Procédé selon une des revendications ci-dessus, caractérisé en ce que le rayonnement donné est appliqué d'une manière consistant en ce qu'un faisceau de rayons, en particulier un faisceau laser (10), est guidé sur la face arrière (4).
  9. Procédé selon la revendication 8, caractérisé en ce que, en plus de l'utilisation du filigrane (5) en tant que masque, l'on fait, pendant le marquage, aussi varier une intensité du rayonnement donné (10), afin d'engendrer une structuration supplémentaire de la modification de l'élément d'impression (9).
  10. Procédé selon une des revendications ci-dessus, caractérisé en ce que, sur la face arrière (4), un marquage supplémentaire est appliqué, lequel atténue ou absorbe le rayonnement donné (10).
  11. Procédé selon une des revendications ci-dessus, caractérisé en ce que, en tant que couche supplémentaire, c'est une couche optiquement variable, en particulier une couche de cristaux liquides, qui est appliquée, laquelle offre une autre impression de couleur devant un fond foncé que devant un fond clair.
EP13705397.1A 2012-02-21 2013-02-20 Procede avec alignement entre un element d'impression et un filigrane Not-in-force EP2817155B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012003601A DE102012003601A1 (de) 2012-02-21 2012-02-21 Druckverfahren mit Passer zwischen Druck und Wasserzeichen
PCT/EP2013/000489 WO2013124059A1 (fr) 2012-02-21 2013-02-20 Procédé avec alignement entre un élément d'impression et un filigrane

Publications (2)

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EP2817155A1 EP2817155A1 (fr) 2014-12-31
EP2817155B1 true EP2817155B1 (fr) 2016-06-22

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EP13705397.1A Not-in-force EP2817155B1 (fr) 2012-02-21 2013-02-20 Procede avec alignement entre un element d'impression et un filigrane

Country Status (6)

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EP (1) EP2817155B1 (fr)
CA (1) CA2862057A1 (fr)
DE (1) DE102012003601A1 (fr)
ES (1) ES2585279T3 (fr)
PL (1) PL2817155T3 (fr)
WO (1) WO2013124059A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP3279004A1 (fr) 2016-08-04 2018-02-07 Giesecke+Devrient Currency Technology GmbH Élément de sécurité, procédé de fabrication d'un élément de sécurité ainsi que document de valeur pourvu d'un tel élément de sécurité

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Publication number Priority date Publication date Assignee Title
DE102013019943A1 (de) * 2013-11-27 2015-05-28 Giesecke & Devrient Gmbh Sicherheitselement mit magnetisch ausrichtbaren Magnetpigmenten und Verfahren zu dessen Herstellung
DE102014010574A1 (de) 2014-07-16 2016-01-21 Giesecke & Devrient Gmbh Wertdokument mit Auf-/Durchsichtseffekt
GB2531582B (en) 2014-10-23 2016-09-07 De La Rue Int Ltd Improvements in security papers and documents
DE102015005083A1 (de) * 2015-04-21 2016-10-27 Giesecke & Devrient Gmbh Verfahren zum Herstellen eines Sicherheitselementes mit Passer zwischen Druckelement und Wasserzeichen
DE102015014036A1 (de) * 2015-10-30 2017-05-04 Giesecke & Devrient Gmbh Sicherheitselement
DE102016002120A1 (de) * 2016-02-24 2017-08-24 Giesecke & Devrient Gmbh Sicherheitsmerkmal und Verfahren zu dessen Herstellung
DE102016009231A1 (de) 2016-07-28 2018-02-01 Giesecke+Devrient Currency Technology Gmbh Verfahren zum Herstellen eines Sicherheitselementes
DE102016009440A1 (de) 2016-08-03 2018-02-08 Giesecke+Devrient Currency Technology Gmbh Verfahren zum Herstellen eines Sicherheitselementes
DE102016015378A1 (de) 2016-12-22 2018-06-28 Giesecke+Devrient Currency Technology Gmbh Verfahren zur Herstellung eines Wertdokuments

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DE3942663A1 (de) 1989-12-22 1991-06-27 Gao Ges Automation Org Datentraeger mit einem fluessigkristall-sicherheitselement
DE19544130A1 (de) 1995-11-27 1997-05-28 Giesecke & Devrient Gmbh Datenträger mit optisch variabler Farbe
DE102006008244A1 (de) 2006-02-22 2007-09-06 Giesecke & Devrient Gmbh Druckfarbe für den Sicherheitsdruck
DE102006008245A1 (de) 2006-02-22 2007-08-30 Giesecke & Devrient Gmbh Sicherheitsmerkmal für Wertdokumente
DE102006008247A1 (de) 2006-02-22 2007-08-23 Giesecke & Devrient Gmbh Lasermarkierbares Sicherheitselement
DE102008063471A1 (de) * 2008-12-17 2010-07-01 Giesecke & Devrient Gmbh Sicherheitselement mit Wasserzeichen
DE102009056462A1 (de) 2009-12-01 2011-06-09 Giesecke & Devrient Gmbh Durchsichts-Sicherheitsmerkmal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3279004A1 (fr) 2016-08-04 2018-02-07 Giesecke+Devrient Currency Technology GmbH Élément de sécurité, procédé de fabrication d'un élément de sécurité ainsi que document de valeur pourvu d'un tel élément de sécurité
DE102016009512A1 (de) 2016-08-04 2018-02-08 Giesecke+Devrient Currency Technology Gmbh Sicherheitselement, Verfahren zum Herstellen eines Sicherheitselements sowie Wertdokument mit einem solchen Sicherheitselement

Also Published As

Publication number Publication date
ES2585279T3 (es) 2016-10-04
WO2013124059A1 (fr) 2013-08-29
PL2817155T3 (pl) 2016-12-30
EP2817155A1 (fr) 2014-12-31
CA2862057A1 (fr) 2013-08-29
DE102012003601A1 (de) 2013-08-22

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