EP2542421B1 - Élément de sécurité avec pigments magnétiques alignés - Google Patents

Élément de sécurité avec pigments magnétiques alignés Download PDF

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Publication number
EP2542421B1
EP2542421B1 EP11706491.5A EP11706491A EP2542421B1 EP 2542421 B1 EP2542421 B1 EP 2542421B1 EP 11706491 A EP11706491 A EP 11706491A EP 2542421 B1 EP2542421 B1 EP 2542421B1
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EP
European Patent Office
Prior art keywords
pigments
motif
magnetic pigments
security element
ink layer
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.)
Active
Application number
EP11706491.5A
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German (de)
English (en)
Other versions
EP2542421A1 (fr
Inventor
Georg Depta
Christoph Mengel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient Currency Technology GmbH
Original Assignee
Giesecke and Devrient Currency Technology GmbH
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Filing date
Publication date
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Priority to PL11706491T priority Critical patent/PL2542421T3/pl
Publication of EP2542421A1 publication Critical patent/EP2542421A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/20—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by magnetic fields
    • B05D3/207—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by magnetic fields post-treatment by magnetic fields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B05D5/061—Special surface effect
    • 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
    • B42D25/36—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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/41—Marking using electromagnetic radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • B42D2033/16—
    • B42D2033/18—
    • B42D2035/20—

Definitions

  • the invention relates to a security element for security papers, documents of value and other data carriers, with a color layer with magnetically oriented magnetic pigments forming a motif in the form of patterns, characters or a coding, which shows a dynamic movement effect when tilting the security element.
  • the invention further relates to a method for producing such a security element, a security paper and a data carrier with such a security element.
  • Data carriers such as valuables or identity documents, but also other valuables, such as branded goods, are often provided with security elements for the purpose of security, which permit verification of the authenticity of the data carrier and at the same time serve as protection against unauthorized reproduction.
  • the security elements can be embodied, for example, in the form of a security thread embedded in a banknote, a covering film for a banknote with a hole, an applied security strip, a self-supporting transfer element or else in the form of a feature area printed directly on a value document.
  • Magnetically alignable effect pigments which are magnetically aligned in the form of a motif to be displayed, for example in the publication, have also been used for this purpose for some time WO 2009/033601 A1 described.
  • An optically variable security element with a color layer contains visual impression and second, by an external magnetic field reversibly alignable effect pigments is from the document WO 2009/074284 A2 , which discloses the preamble of claim 1, known.
  • the color layer may also contain third magnetically aligned and fixed in their orientation effect pigments.
  • the present invention seeks to provide a security element of the type mentioned, which is a high counterfeit security with good recognizability and easy verifiability.
  • the first dynamic motif of the magnetically aligned magnetic pigments is combined with a second, static motif generated by the action of laser radiation in the form of patterns, characters or a coding whose fixed outline, when viewed, forms a fixed reference point for the magnet dynamic motive forms.
  • the attention and recognition value of the security element is significantly increased.
  • the static motif provides a fixed reference point for the motion effects of the dynamic subject, thereby making it easier for a viewer to see and visually more conspicuous.
  • the combination of static and dynamic motif is easy to remember and their presence or absence can be easily determined even without tools, so that the relevant security features can be easily and reliably detected and verified by the viewer.
  • the creation of the static motif by means of laser exposure also allows special pass effects and To provide color matching features that can not be practically produced by other methods. Specific examples of such effects and features are given and explained below.
  • the magnetic pigments are non-spherical, in particular platelet-shaped.
  • the magnetic pigments can be colored and / or optically variable and, in the latter case, in particular contain color-shifting thin-film elements with an interference layer structure.
  • the magnetic pigments can be formed, for example, on the basis of high-purity iron powder and, in particular, be prepared from reducing-treated carbonyl iron powder.
  • Advantageous platelet-shaped iron pigments can in particular the document EP 1 251 152 B1 are taken from the disclosure of the preparation and properties of such pigments in the present description.
  • the magnetic pigments may also be, for example, wet-chemically produced multilayer pigments or magnetic interference pigments, as described in US Pat EP 1 366 380 A2 are also included in the present description, the disclosure of the preparation and properties of such pigments.
  • the magnetic pigments are present as a mixture of different, preferably platelet-shaped, magnetic pigments.
  • the ratio of the largest to the smallest diameter of platelet-shaped magnetic pigments is advantageously more than 5: 1, preferably more than 10: 1. This ratio is particularly preferably between 40: 1 and 400: 1.
  • the largest diameter of the platelet-shaped magnetic pigments is advantageous more than 2 microns, preferably more than 5 microns, more preferably more than 10 microns and most preferably more than 15 microns.
  • Platelet-shaped magnetic pigments, in particular in the preferred size range and in the preferred diameter-to-thickness range, can be oriented as desired by an external magnetic field relative to the layer plane of the color layer. With high diameter-to-thickness ratios, high contrasts between translucent and opaque layer areas can be set.
  • the aligned platelet-shaped magnetic pigments form an effective, three-dimensional appearance for the human eye, which in the context of this description is also referred to as a 3D effect or 3D impression of the motif.
  • the three-dimensional appearance is associated with a dynamic movement effect, in which the position of the generated motif seems to move when tilting the security element or when changing the viewing or lighting direction.
  • the preferably platelet-shaped magnetic pigments are aligned in the form of a centrosymmetric marking, which advantageously contains in its interior a substantially uniformly aligned region with a diameter of 5 mm or more.
  • the platelet-shaped magnetic pigments are aligned substantially perpendicular to the surface of the ink layer inside the centrosymmetric marking, and are aligned outside the marking with a sharp transition substantially parallel to the surface of the ink layer.
  • the magnetic pigments are aligned by exactly one spherical magnet in the form of the first motif.
  • the magnetic pigments are aligned by a plurality of spaced-apart spherical magnets in the form of the first motif.
  • the plurality of ball magnets can be in direct contact with each other during the alignment step or separated from each other by spacers.
  • the ball magnets can be arranged with such a large distance that their magnetic fields do not influence each other practically.
  • simultaneously ball magnets of different diameters can be used.
  • Another way to specifically control the orientation of the magnetic pigments is to adjust the distance of the ball magnet or the ball magnets to the color layer of the security element suitable. The smaller this distance, the greater the selectivity from oriented to non-oriented areas. The most pronounced 3D effect, on the other hand, is achieved at slightly greater distances.
  • aligning a plurality of spherical magnets can be arranged at different distances to the ink layer and thus create motifs with different degrees of expression of the 3D effect and different selectivity.
  • the preferably platelet-shaped magnetic pigments are aligned in the form of a marking having two regions in which the magnetic pigments are aligned substantially parallel to two planes pointing in different directions, preferably with a sharp transition between the regions.
  • the orientation of the preferably platelet-shaped magnetic pigments is in the form of a marking which contains a region in which the magnetic pigments are aligned in an arc relative to the surface of the ink layer.
  • the second, static motif is arranged completely within the color layer with the aligned magnetic pigments.
  • the second static motif in the register is partly arranged inside and partly outside the color layer with the oriented magnetic pigments.
  • the continuation of the second motif outside the color layer with perfect registration "sews" the ink layer, as it were, with the surrounding substrate, thereby creating a particularly difficult to reproduce design with high security against counterfeiting.
  • the second static motif may also extend over a recess in the color layer, which likewise represents an area outside the color layer.
  • the optical properties in particular the color or the optical variability of the magnetic pigments, are altered in the region of the second, static motif, the alignment of the magnetic pigments, however, being preserved.
  • Such a change in the optical properties will hereinafter be referred to as "orientation-preserving modification" of the magnetic pigments.
  • the orientation-preserving modification in particular leaves the dynamic light-dark effects of the first dynamic motif unchanged, so that the impression of a fixed level is created above the first motif through which the first motif shines through.
  • the orientation of the magnetic pigments in the area of the second, static motif is destroyed or the magnetic pigments are removed from the color layer in the area of the second, static motif.
  • the second, static motif then shows no movement effect when viewed.
  • one or more components of the mixture may be altered.
  • the orientation of one or more components of this mixture may be destroyed in the region of the second, static motif, or one or more components of the mixture are removed from the color layer in the region of the second, static motif.
  • the second motif may also contain two partial regions which were generated with different laser parameters, wherein the magnetic pigments were modified to preserve orientation in one partial region and were destroyed or removed in the other partial region. Since the sections are created with the same laser beam in the same operation, they are in perfect register with each other.
  • the ink layer is preferably formed by a screen printing layer.
  • the color layer with the magnetic pigments is expediently formed on the basis of a UV-curing color system, pure UV systems, UV / water-based systems or even UV / solvent-based systems being considered.
  • the color layer may also contain dyes, luminescent substances or further pigments, in particular colored pigments, luminescent or optically variable pigments, for example pigments prepared on the basis of liquid-crystalline polymers or iridescent pearlescent pigments, as described, for example, by Merck KGaA under the name Iriodin (R) are sold.
  • dyes, luminescent substances or further pigments in particular colored pigments, luminescent or optically variable pigments, for example pigments prepared on the basis of liquid-crystalline polymers or iridescent pearlescent pigments, as described, for example, by Merck KGaA under the name Iriodin (R) are sold.
  • the color layer can also be arranged on a background layer which is colored or optically variable.
  • the background layer may have a colored or optically variable further identification. Such further identification can also interact visually with the first and / or second motif.
  • the security element according to the invention can be further equipped with one or more protective layers for use as a security element for security papers, value documents and other data carriers, eg. with a transparent protective varnish.
  • a color layer based on a UV-curing color system is used, and the aligned magnetic pigments are fixed by UV curing of the color layer.
  • the ink layer is preferably printed by screen printing, even if in principle other printing processes, such as flexographic printing or intaglio printing come into question.
  • the laser application for generating the second motif with a pulsed infrared laser in the wavelength range from 0.8 ⁇ m to 3 ⁇ m, for example an Nd: YAG laser.
  • the laser application is preferably carried out with short pulse durations of 20 ns or less, particularly preferably 12 ns or less.
  • the invention also includes a data carrier with a security element of the type described, wherein the security element can be arranged both in an opaque region of the data carrier and in or over a transparent window region or a through opening of the data carrier.
  • the data carrier can be a value document, such as a banknote, in particular a paper banknote, a polymer banknote or a foil-paper composite banknote, or an identity card, such as a credit card, a bankcard, a cashcard, an authorization card, a banknote Identity card or a pass personalization page.
  • the first and / or second motif for example, represent a numbering, in particular as a replacement or supplement to a Buchdruckzifferung, about on banknotes.
  • the first and / or second motif may also consist of numbers and letters derived from a digit, for example, numerals or letters calculated from standard-numbered cryptographic methods, or from a repetition of parts of a standard-numbering.
  • the first and / or second motif may further consist of a value number, for example the denomination of a banknote, as in Fig. 7 may display a logo, such as a central bank publisher logo or anniversary commemorative event, may represent a date and / or time, or derived information such as a batch code, may represent a graphical element such as in Fig. 2 or may represent a code such as a bar code, matrix code, or a multi-color code.
  • either the magnetic pigment or, in the case of a mixture of different magnetic pigments, a particular magnetic pigment or the color layer can be blackened by the laser application or the substrate or a background layer below the color layer.
  • blending effects are possible, for example, a silver marking of the color layer and a blackening of the underlying substrate. The blackening may appear, depending on the thermal behavior of the substrate, as a finer or thicker mark than the marking of the color layer.
  • one or more substrate layers may also be provided above the color layer.
  • the layers above the color layer may be laser-markable, whereby here also different line widths can result.
  • These cover layers can also be patterned to produce additional tilting effects, for example by a grid of cylindrical lenses.
  • one or more substrate layers are present below the ink layer, they can be blackened and / or tactilely marked in particular.
  • Substantially opaque printed layers can also be arranged above the color layer. These can, when they react with the laser radiation, be blackened or removed by the laser marking, for example to produce matt-gloss effects. At the same time the color layer can be marked orientation preserving. If the overpressure is transparent to the laser radiation, it can serve as a protective layer.
  • color impression and laser marks disappear when viewed in review.
  • the laser marking can also remove the color, so that at the marked points the transparency is improved.
  • security elements can be used in transparent substrates or in transparent window areas of a data carrier.
  • a transparent area may also represent only a partial area within a more complex structure, and / or may be combined with blackening of color layers or substrate layers.
  • FIG. 1 shows a schematic representation of a banknote 10, with an in Fig. 2 security element 12 shown in more detail is provided with a combined static and dynamic motive.
  • the security element 12 has a color layer 20 with magnetically oriented, platelet-shaped magnetic pigments, which is aligned by a spherical magnet in the form of a sharply demarcated circular marking 22.
  • the circular marker 22 shows a dynamic motion effect, in which the position of the marker 22 on the security element 12 seems to move when the security element is tilted or when the viewing or illumination direction changes, thus forming a dynamic motif.
  • the dynamic motif 22 is combined with a laser-generated, static motif 28 in the form of two eighth notes, which shows no movement effect, but forms a fixed reference point for the dynamic motif 22 when viewed.
  • the viewer can also easily check the security element 12 for authenticity, since the combination of static and dynamic motif is easy to memorize and its presence can be determined without any aids.
  • the generation of the static motif by means of laser radiation can produce special effects in the combination marking which can not or only with difficulty be achieved in other ways.
  • FIG. 4 shows a cross section through the security element of Fig. 2 along the line IV-IV
  • FIG. 3 schematically shows the alignment of the still movable magnetic pigments 44 in the field of a spherical magnet 30th
  • the magnetic pigments 44 may be, for example, platelet-shaped iron pigments which are produced from reducing-treated carbonyl iron powder and which can be produced with a high ratio of platelet diameter to platelet thickness. Also suitable are wet-chemically prepared pigments with a support of mica, SiO 2 or mica and an outer shell of iron oxide (Fe 3 O 4 ), which gives the magnetic pigments their magnetic properties. Such pigments are offered for example by Merck KGaA under the name Colorona Blackstar (R). By changing the iron oxide layer thickness, different shades can be achieved (eg green, blue, red).
  • a gold-colored magnetically orientable magnetic pigment may comprise Al 2 O 3 coated with Fe 3 O 4 and MgO.
  • a color layer 20 based on a UV-curing color system is applied, which contains the desired magnetically alignable, platelet-shaped magnetic pigments 44.
  • the printing of the ink layer 20 is preferably carried out by screen printing.
  • the substrate 40 is brought with the still moving in the ink layer 20 magnetic pigments 44 at a small distance over a spherical magnet 30 ( Fig. 3 ).
  • the spherically extending magnetic field lines 32 of the spherical magnet align the magnetic pigments 44 in a defined region 42 essentially perpendicular to the substrate surface, while the preferred orientation the magnetic pigment 44 extends outside the region 42 substantially parallel to the substrate surface.
  • the thus aligned magnetic pigments 44 are permanently fixed in their orientation by curing the UV varnish, as in the cross section of FIG Fig. 4 shown.
  • a centrosymmetric, circular marking 22 is formed, which in its interior has a substantially uniformly aligned region 24 (FIG. Fig. 2 ), in which the magnetic pigments are perpendicular to the substrate surface.
  • the inner region 24 merges into the surrounding region 21 of the marking, in which the magnetic pigments of the color layer 20 are aligned essentially parallel to their surface.
  • the color layer 20 is exposed to laser radiation, preferably laser radiation of a pulsed infrared laser with short pulse durations of about 20 ns or less, preferably about 12 ns or less.
  • the laser beam is typically passed over the color layer 20 with a width of a few tenths of a millimeter and a marking speed of a few m / s in the form of the desired static motif 28.
  • the laser radiation destroys the orientation of the magnetic pigments in the applied areas or the magnetic pigments 44 are even completely removed from the ink layer 20 in the applied areas 28.
  • the latter is in Fig. 5 shown, which is a cross section through the security element of Fig. 2 along the line VV shows.
  • the regions 28 without magnetic pigments therefore no longer take part in the dynamic movement effect of the motif 22, but appear stationary and static.
  • the visual impression of the color layer 20 is changed in the applied areas 28 against the unimpacted areas of the ink layer, the type of visual change in particular by the design of the ink layer, by the choice of magnetic pigments, by the laser parameters in the application, by a optionally arranged below the color layer 20 background layer or a layer disposed over the color layer 20 cover layer can be adjusted in wide ranges as desired.
  • the color layer 20 may contain color pigments which are not influenced by the laser radiation and whose color impression after exposure determines the visual impression of the regions 28.
  • the color layer 20 can also be transparent or translucent after removal of the magnetic pigments and release the view of a background layer in the areas 28.
  • a background layer can be monochrome or even contain a marking, so that the applied areas 28 at different points of the security element 12 show a different visual impression.
  • the alignment of the magnetic pigments is obtained by the laser radiation, however, the optical properties, in particular the color or the optical variability of the magnetic pigments are changed.
  • FIG. 6 shows in cross-section a representation as in Fig. 5 for an embodiment in which the color layer 20 contains optically variable, magnetic interference layer pigments 52. Due to the laser radiation in the acted areas 50 only one or several layers of the interference layer pigments 52 are removed or destroyed, so that they lose their optically variable properties there and appear as modified pigments 54, for example with a silver-gray color impression.
  • a mixing region is formed in the security element, in which the modified pigments 54 on the one hand have a three-dimensional appearance due to their orientation.
  • static information is introduced into the color layer 20, which serves as a fixed reference point for the dynamic motif 22.
  • the dynamic light-dark effects of the modified magnetic pigments 54 remain unchanged, so that the impression of a fixed plane over the dynamic motif 22 is created, through which the dynamic motif 22, as it were, shines through.
  • the orientation-preserving modification of the optical properties of the magnetic pigments 52 can be used as an additional security feature, since the unchanged orientation of the modified pigments 54 can still be viewed and detected visually as well as with suitable auxiliaries by obtaining the light-dark effects.
  • FIG. 7 shows a security element 60 with a color layer 20 containing a color mixture of magnetically oriented, optically variable, platelet-shaped magnetic pigments and yellow-green color pigments.
  • a security element 60 with a color layer 20 containing a color mixture of magnetically oriented, optically variable, platelet-shaped magnetic pigments and yellow-green color pigments.
  • a circular motive 22 with dynamic movement effect.
  • the color mixture may also contain optically variable pigments, in particular interference pigments or liquid crystal pigments.
  • the color mixture may consist of a mixture of different magnetically oriented platelet-shaped magnetic pigments.
  • the dynamic motif 22 is combined with two laser-generated static motifs 62, 64, which form stationary reference points for the dynamic motif 22.
  • the first static motif 62 forms by its outline the denomination "50" of the banknote 10 and is formed by an area in which the optical properties of the magnetic pigments have been modified to preserve orientation.
  • the numerals of the denomination "50" appear with their stationary outline, for example silvery in front of the color-shifting, yellow-green-primed background of the optically variable magnetic pigments and the yellow-green color pigments of the color layer 20.
  • the second, linear, static motif 64 extends beyond the boundary of the color layer 20 into the adjoining banknote substrate 70.
  • the magnetic pigments are completely removed from the color layer 20 by the laser application , as in Fig. 5 shown. Of the color mixture then remain only the yellow-green color pigments.
  • the partial regions 66 therefore do not participate in the dynamic movement effect of the motif 22, but rather form a static image information within the color layer 20.
  • a colored and tactile detectable marking is produced in the banknote substrate 70 by the action of the laser radiation. Since the portions 66, 68 are formed inside and outside the ink layer 20 by a continuous guidance of the same laser beam, they are in perfect register with each other.
  • the security element 60 is practically "sewn" by the static motif 64 extending beyond the edge of the color layer 20 with the surrounding banknote substrate 70.
  • Such a continuous motif between a screen-printing ink layer 20 and the surrounding substrate with color edge at the edge of the element can be achieved with perfect registration only by the laser application according to the invention.
  • Another safety effect is formed in the described embodiment by the yellow-green color of the arranged within the ink layer portion 66, which results from the removal of the magnetic pigments and the stagnation of the yellow-green color pigments.
  • the color of the partial region 66 therefore corresponds to the color base of the surrounding, color-shifting layer 20.
  • Such a correspondence is very difficult to reproduce in terms of printing technology, in particular not together with the perfect registration of the continued partial regions 66, 68.

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Claims (15)

  1. Élément de sécurité (12) pour papiers de sécurité, documents de valeur et autres supports de données, avec au moins une couche colorée (20) avec des pigments magnétiques (44) orientés magnétiquement et fixés dans leur orientation, lesquels forment un premier motif (22) sous forme d'un dessin, symbole ou d'un codage lequel, lors du basculement de l'élément de sécurité, montre un effet de mouvement dynamique, dans lequel le premier motif dynamique (22) est combiné avec un deuxième motif statique (28) généré dans la couche colorée par l'effet d'un rayonnement laser sous la forme de dessins, symboles ou d'un codage, dont le contour fixe forme, lors de l'observation, un point de référence fixe pour le motif dynamique,
    caractérisé en ce que,
    dans la zone du deuxième motif statique (28), l'orientation des pigments magnétiques (44) est détruite ou que dans la zone du deuxième motif statique (28), les pigments magnétiques (44) sont éliminés de la couche colorée (20), dans lequel les pigments magnétiques orientés (44) forment une apparence semblant tridimensionnelle.
  2. Élément de sécurité selon la revendication 1, caractérisé en ce que les pigments magnétiques ne sont pas réalisés de manière sphérique, en particulier en forme de plaquettes.
  3. Élément de sécurité selon la revendication 1 ou 2, caractérisé en ce que les pigments magnétiques sont colorés et/ou variables optiquement, en particulier contiennent des éléments à couche mince à changement de couleur avec une structure de couche d'interférence.
  4. Élément de sécurité selon l'une au moins des revendications 1 à 3, caractérisé en ce que les pigments magnétiques sont formés à base de poudre de fer de grande pureté.
  5. Élément de sécurité selon l'une au moins des revendications 1 à 4, caractérisé en ce que les pigments magnétiques sont orientés en forme de marquage centrosymétrique qui contient de préférence dans son intérieur une zone orientée sensiblement de façon homogène avec un diamètre de 5 mm ou plus, et/ou en ce que les pigments magnétiques sont orientés, par un aimant sphérique ou par plusieurs aimants sphériques espacés, en forme du premier motif.
  6. Élément de sécurité selon l'une au moins des revendications 1 à 5, caractérisé en ce que le deuxième motif statique est entièrement disposé à l'intérieur de la couche colorée avec les pigments magnétiques orientés, ou bien que le deuxième motif statique est disposé en repérage, en partie à l'intérieur et en partie à l'extérieur de la couche colorée avec les pigments magnétiques orientés.
  7. Élément de sécurité selon l'une au moins des revendications 1 à 6, caractérisé en ce que la couche colorée est formée par une couche de sérigraphie et/ou que la couche colorée avec les pigments magnétiques est formée sur la base d'un système d'encres durcissant aux UV.
  8. Élément de sécurité selon l'une au moins des revendications 1 à 7, caractérisé en ce que la couche colorée contient, mis à part les pigments magnétiques orientés magnétiquement, des substances colorées, des substances luminescentes ou d'autres pigments, en particulier des pigments colorés et/ou des pigments luminescents et/ou des pigments variables optiquement.
  9. Élément de sécurité selon l'une au moins des revendications 1 à 8, caractérisé en ce que la couche colorée est disposée sur une sous-couche, laquelle est colorée ou variable optiquement, en particulier en ce que la sous-couche présente un autre marquage coloré ou variable optiquement.
  10. Procédé pour la fabrication d'un élément de sécurité (12) pour sécuriser des papiers de sécurité, documents de valeur et autres supports de données, dans lequel
    - on applique sur un substrat au moins une couche colorée (20) avec des pigments magnétiques orientables magnétiquement,
    - les pigments magnétiques (44) sont orientés magnétiquement en forme de desseins, symboles ou d'un codage et sont fixés dans leur orientation, moyennant quoi un premier motif (22) avec un effet de mouvement dynamique et une apparence semblant tridimensionnelle est généré, et
    - par soumission à un rayonnement laser, un deuxième motif statique (28) en forme de dessins, symboles ou d'un codage est généré dans la couche colorée, dont le contour fixe lors de l'observation forme un point de référence fixe pour le premier motif, dans lequel, dans la zone du deuxième motif statique (28), l'orientation des pigments magnétiques (44) est détruite ou les pigments magnétiques (44) sont éliminés de la couche colorée (20) dans la zone du deuxième motif statique (28).
  11. Procédé selon la revendication 10, caractérisé en ce qu'une couche colorée à base d'un système d'encres durcissant aux UV est utilisée et les pigments magnétiques orientés sont fixés par durcissement aux UV de la couche colorée.
  12. Procédé selon la revendication 10 ou 11, caractérisé en ce que la couche colorée est imprimée par sérigraphie.
  13. Procédé selon l'une au moins des revendications 10 à 12, caractérisé en ce que la soumission au rayonnement laser est réalisée avec un laser infrarouge pulsé dans la plage de longueurs d'ondes de 0,8 µm à 3 µm, de préférence avec de brèves durées d'impulsion de 20 ns ou moins, de manière particulièrement préférée avec de brèves durées d'impulsion de 12 ns ou moins.
  14. Support de données avec un élément de sécurité (12) selon l'une au moins des revendications 1 à 9.
  15. Support de données selon la revendication 14, caractérisé en ce que l'élément de sécurité est disposé dans ou par-dessus une zone de fenêtre transparente ou une ouverture traversante du support de données.
EP11706491.5A 2010-03-03 2011-03-02 Élément de sécurité avec pigments magnétiques alignés Active EP2542421B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11706491T PL2542421T3 (pl) 2010-03-03 2011-03-02 Element bezpieczeństwa z ustawionymi pigmentami magnetycznymi

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010009977A DE102010009977A1 (de) 2010-03-03 2010-03-03 Sicherheitselement mit ausgerichteten Magnetpigmenten
PCT/EP2011/001031 WO2011107271A1 (fr) 2010-03-03 2011-03-02 Élément de sécurité avec pigments magnétiques alignés

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EP2542421A1 EP2542421A1 (fr) 2013-01-09
EP2542421B1 true EP2542421B1 (fr) 2019-05-08

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Country Status (7)

Country Link
EP (1) EP2542421B1 (fr)
AU (1) AU2011223202A1 (fr)
BR (1) BR112012021113A2 (fr)
CA (1) CA2791199A1 (fr)
DE (1) DE102010009977A1 (fr)
PL (1) PL2542421T3 (fr)
WO (1) WO2011107271A1 (fr)

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WO2021259527A1 (fr) 2020-06-23 2021-12-30 Sicpa Holding Sa Procédés de production de couches à effet optique comprenant des particules pigmentaires magnétiques ou magnétisables
WO2022207692A1 (fr) 2021-03-31 2022-10-06 Sicpa Holding Sa Procédés de production de couches à effet optique comprenant des particules pigmentaires magnétiques ou magnétisables et présentant un ou plusieurs indices
WO2023161464A1 (fr) 2022-02-28 2023-08-31 Sicpa Holding Sa Procédés de production de couches à effet optique comprenant des particules pigmentaires magnétiques ou magnétisables et présentant un ou plusieurs indices
WO2024028408A1 (fr) 2022-08-05 2024-02-08 Sicpa Holding Sa Procédés de production de couches à effet optique comprenant des particules de pigment magnétiques ou magnétisables et présentant un ou plusieurs indices

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DE102011120848B3 (de) * 2011-12-09 2013-05-23 Giesecke & Devrient Gmbh Sicherheitselement für Wertgegenstände, Verfahren zur Herstellung eines Sicherheitselements für Wertgegenstände und tragbarer Datenträger mit einem Sicherheitselement.
DE102012006623A1 (de) 2012-03-30 2013-10-02 Giesecke & Devrient Gmbh Verfahren zum Herstellen eines Datenträgers und daraus erhältlicher Datenträger
MA39097B1 (fr) * 2013-12-13 2018-08-31 Sicpa Holding Sa Procédé de production de couches à effets optiques
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DE102014007976A1 (de) 2014-06-04 2015-12-31 Friedrich Kisters Sicherheitsvorrichtung und Authentifizierungsverfahren mit dynamischen Sicherheitsmerkmalen
US10357991B2 (en) 2016-12-19 2019-07-23 Viavi Solutions Inc. Security ink based security feature
DE102018000385A1 (de) * 2018-01-18 2019-07-18 Giesecke+Devrient Currency Technology Gmbh Einstellungsmagnet für die Herstellung von Sicherheitselementen mit magnetisch orientierten Effektpigmenten und Herstellverfahren für solche Einstellmagnete
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Publication number Priority date Publication date Assignee Title
WO2021259527A1 (fr) 2020-06-23 2021-12-30 Sicpa Holding Sa Procédés de production de couches à effet optique comprenant des particules pigmentaires magnétiques ou magnétisables
WO2022207692A1 (fr) 2021-03-31 2022-10-06 Sicpa Holding Sa Procédés de production de couches à effet optique comprenant des particules pigmentaires magnétiques ou magnétisables et présentant un ou plusieurs indices
WO2023161464A1 (fr) 2022-02-28 2023-08-31 Sicpa Holding Sa Procédés de production de couches à effet optique comprenant des particules pigmentaires magnétiques ou magnétisables et présentant un ou plusieurs indices
WO2024028408A1 (fr) 2022-08-05 2024-02-08 Sicpa Holding Sa Procédés de production de couches à effet optique comprenant des particules de pigment magnétiques ou magnétisables et présentant un ou plusieurs indices

Also Published As

Publication number Publication date
AU2011223202A1 (en) 2012-10-25
BR112012021113A2 (pt) 2019-09-24
EP2542421A1 (fr) 2013-01-09
PL2542421T3 (pl) 2019-11-29
CA2791199A1 (fr) 2011-09-09
DE102010009977A1 (de) 2011-09-08
WO2011107271A1 (fr) 2011-09-09

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