EP2318884B1 - Kinégramme binaire - Google Patents

Kinégramme binaire Download PDF

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Publication number
EP2318884B1
EP2318884B1 EP09778161A EP09778161A EP2318884B1 EP 2318884 B1 EP2318884 B1 EP 2318884B1 EP 09778161 A EP09778161 A EP 09778161A EP 09778161 A EP09778161 A EP 09778161A EP 2318884 B1 EP2318884 B1 EP 2318884B1
Authority
EP
European Patent Office
Prior art keywords
layer
color
effect
ink layer
effect 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
EP09778161A
Other languages
German (de)
English (en)
Other versions
EP2318884A1 (fr
Inventor
Klaus Habik
Christof Baldus
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Priority to PL09778161T priority Critical patent/PL2318884T3/pl
Publication of EP2318884A1 publication Critical patent/EP2318884A1/fr
Application granted granted Critical
Publication of EP2318884B1 publication Critical patent/EP2318884B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • 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
    • B41M3/148—Transitory images, i.e. images only visible from certain viewing angles
    • 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
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F1/00—Designs or pictures characterised by special or unusual light effects
    • B44F1/08—Designs or pictures characterised by special or unusual light effects characterised by colour effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F1/00—Designs or pictures characterised by special or unusual light effects
    • B44F1/08—Designs or pictures characterised by special or unusual light effects characterised by colour effects
    • B44F1/10—Changing, amusing, or secret pictures
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/08—Photoprinting; Processes and means for preventing photoprinting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/02—Letterpress printing, e.g. book printing
    • B41M1/04—Flexographic printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/06—Lithographic printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/14—Multicolour printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/14—Multicolour printing
    • B41M1/18—Printing one ink over another
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/14—Multicolour printing
    • B41M1/20—Multicolour printing by applying differently-coloured inks simultaneously to different parts of the printing surface
    • B42D2033/20—
    • B42D2035/14—
    • B42D2035/24—

Definitions

  • the application relates to a security element for a data carrier with an effect layer, a data carrier with such a security element and a production method for such a security element.
  • Data carriers such as documents of value or identity documents, in particular identity cards, credit cards or passports, or other valuables, such as branded articles, are provided with security elements for the purpose of security, which permit verification of the authenticity of the article and which at the same time serve as protection against unauthorized reproduction.
  • security elements often produce a highly visible visual impression, which is why such security elements are used in addition to their function as securing means sometimes even as decorative elements for such media or for their packaging.
  • a security element can be embedded in such data carriers, for example in a banknote or in a chip card, or designed as a self-supporting transfer element, for example as a patch or as a label, which is applied to a data carrier or other object to be secured after its production.
  • the security element can also be integrated into the data carrier during production.
  • Data carriers in the context of the present invention are in particular banknotes, stocks, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other papers forgery, such as passports or other identity documents, and also card-shaped data carriers, in particular credit and chip cards, as well as production assurance elements, such as Labels, seals, packaging and the like.
  • data carrier also encompasses non-executable precursors of such data carriers which, for example in the case of security paper, are present in virtually endless form and are processed further at a later time.
  • security elements can have optically variable elements which convey different visual impressions to the viewer from different viewing angles.
  • optical interference layers can be present either over the entire surface or in pigment form.
  • Such interference layers typically have a thin-film structure and, for example in the case of a multilayer thin-film structure, comprise a reflection layer, an absorber layer and one or more intervening dielectric spacers and are based, for example, on mica, on SiO 2 or on Al 2 O 2 .
  • Such interference layers are referred to as one or more layers according to the number of dielectric layers.
  • interference layer pigments for example, under the name Iriodin ® (single layer) or Colorcrypt ® (multi-layer) marketed by Merck KGaA.
  • Inks with multilayer interference coating pigments are also sold under the name OVI ® of SICPA.
  • cholesteric liquid crystals can also be used. These are for example as liquid-crystalline silicone polymers or as pigments in so-called STEP colors ("Shimmery Twin Effect Protection").
  • holograms which include metallic layers typically formed by vacuum deposition, or diffraction gratings, at different viewing angles, also exhibit a different visual impression to an observer.
  • the various optical impressions for a viewer include, for example, a so-called color shift effect, in which for the viewer different shades are recognizable under different viewing angles.
  • Different visual impressions can also arise because, under a certain viewing angle, the effect layer is completely transparent and thus invisible to a viewer, while it shows a hue at a different viewing angle (effect angle).
  • Such effect layers are often iridescent, that is they show a pearlescent, as it is known for example from shells or mica.
  • a color change-indicating pigments are referred to as goniochromatic pigments.
  • Single-layer interference layers printing inks with single-layer interference-layer pigments or liquid-crystalline pigments are frequently highly translucent at all viewing angles, so that the color impression perceivable by the viewer when viewing the effect layer under the effect angle is relatively weak.
  • Such effect layers with high light transmission are therefore preferably applied over dark or black backgrounds to improve the visibility of the color change.
  • multilayered interference layers and multilayered interference layer pigments exhibit low translucency and are sometimes completely opaque.
  • the overprinting of printed information with an optically variable layer is known.
  • the aim is to show the optically variable effect in a finely structured area, for example only within a narrow line, which can not be realized with the screen printing method typically used for optically variable colors because of its low spatial resolution.
  • finely structured regions such as guilloches
  • the colors of the printed information and the background are then chosen such that the optically variable effect of the entire surface overlying effect layer is perceived for a viewer, for example, only on the printed in intaglio fine-structured areas.
  • US 2005/240549 A1 discloses a security element comprising a backing and two layers wherein the hue of one layer forms a complementary contrast to the hue of the other layer and a method of making the security element.
  • optically variable colors commonly used for security elements are not readily available to a counterfeiter. However, at least for an inexperienced or inattentive viewer, similar color impressions can also be achieved via other substances, as occur, for example, in nail polish. Not only monochrome imprints can be left out optically variable colors, but also two- and multi-colored imprints emulate.
  • the object of the present invention is to provide a security element with improved testability for authenticity and with improved protection against counterfeiting. It is a further object of the invention to specify a data carrier and a production method for such a security element.
  • the security element according to the invention comprises a color layer and an effect layer.
  • the color layer has a hue that can be visually perceived and that does not change as the viewing angle is changed, for example by tilting the security element.
  • the effect layer is substantially transparent at a first angle, for example in plan view, and is scarcely, preferably not at all, perceived by the viewer at this angle if, as assumed for the following description, it lies in the direction of observation above the color layer.
  • a color impression results for the viewer in plan view, which is preferably determined exclusively by the hue of the underlying color layer.
  • essentially transparent means that the observer does not perceive the effect layer at all or hardly at all under a certain viewing angle due to its complete transparency or very high translucency.
  • the effect layer When viewed at a second angle, the so-called effect angle, and the effect layer gives the viewer a hue, with both color impressions are superimposed.
  • the effect layer imparts a hue which produces a complementary contrast to the hue of the color layer.
  • the hue of the color layer and the effect layer are complementary colors.
  • complementary colors depends on the color space. For example, it is required that spectral light sensitivities for photo-optic vision (daytime vision) add up to 1 at any point in the visible spectrum. In this definition, the additive mixture of complementary colors so white (see Lexicon of Optics, published by: Harry Paul, Spektrum Akademischer Verlag GmbH, Heidelberg, 2003, page 360). Contrary to such a strict mathematical definition, the present invention is based on the recognition that, when viewing a translucent, colored layer, which is arranged on an underlying, for example, opaque color layer, the color impression resulting for the viewer especially from the hue of the overlying translucent layer is dominated when they are essentially complementary shades.
  • the two shades may have slight deviations from the strict definition of complementary colors, which is expressed below by the term "complementary contrast".
  • an effect layer forms such a colored, light-transmissive layer. The viewer then perceives predominantly the hue of the effect layer under the effect angle. In this case, the hue of the underlying color layer largely, ideally completely, back and is correspondingly little or no longer perceived.
  • the security element has a binary tilting effect, since when viewed at a first angle, ideally only the hue of the color layer and, when viewed under the effect angle, ideally only the hue of the effect layer is visible.
  • the selection of colors according to the invention is also advantageous because under the effect angle, the reflection spectrum of the underlying color layer by the overlying effect layer with the at least approximately complementary hue in addition is hidden (absorbed) and mixes with the harmonic hue of the effect layer, so that the hue (motif) of the hidden or mixed color layer is no longer perceived by the human eye.
  • the subject's effect is recognized by the viewer and then dominates over the hue (motif) of the underlying color layer.
  • the majority of the optically variable layers known in the prior art are suitable as the effect layer.
  • single-layer interference layers, colors with single-layer interference pigments, for example Iriodin ® Colors of Merck, or multi-layer interference layer pigments, for example Colorcrypt ® Colors Merck and colors with cholesteric liquid crystal pigments are particularly preferred.
  • the available for example from Merck Iriodin pigments are usually pigments with a core of mica, which is an interference layer, in particular of titanium dichloride, iron chloride or a combination of titanium dichloride and iron chloride.
  • the layer thicknesses of the interference layer are chosen so that they are in the wavelength range of the desired color (1st order) or at a multiple of the desired wavelength (2nd, 3rd, 4th, etc. order).
  • pigments having an interference layer thickness in the range of the multiple of the desired wavelength often also referred to as “higher order pigments” are stronger in color than so-called “1st order pigments”.
  • the observer can perceive a single characteristic color only at a certain viewing angle.
  • Colorcrypt ® pigments are generally pigments having a core of silicon oxide having an interference layer, which comprises a plurality of layers, in particular intermediate layers.
  • the viewer thus perceives different colors under different viewing angles, but only under a relatively narrow wavelength range around a specific center wavelength.
  • the OVI ® pigments or OVI ® have -Farben SICPA to a viewing-angle dependent color-shift effect in a relatively wide wavelength range.
  • Iriodin ® pigments In order to achieve a sufficiently intense hue of the effect layer, a sufficient amount of eg Iriodin ® pigments must be applied.
  • the coated surface should ideally be equipped with a substantially closed Iriodin ® -Pigment für. This is achieved by applying on average an application amount of about 9 g / m 2 (dry) of Iriodin ® effect color, resulting in an approximately 30 ⁇ m thick pigment layer.
  • An additional increase in the intensity of the hue is achieved by a calendering of the substrate, because the flat pigments align themselves even better in a plane.
  • the underlying color layer is preferably an opaque layer, whereby the hue of the security element is independent of the substrate used.
  • a translucent, that is to say semitransparent, color layer can also be used.
  • the effect layer is preferably arranged on the color layer so that it directly adjoins the color layer.
  • the color layer and the effect layer are separate layers and not for example to form a substantially homogeneous layer which is a mixture of colors which according to the invention in each case build up the color layer and the effect layer.
  • the effect layer is spatially structured, that is applied in partial areas on the underlying color layer, so that it conveys information to the viewer.
  • a recess may be provided in the effect layer, which may be e.g. is advantageous for an effect layer formed from cholesteric liquid crystal pigments.
  • the effect layer when viewed under the effect angle, the effect layer only shows a hue complementary to the color layer in a first subregion.
  • the effect layer has, in addition to or instead of a recess, a second portion in which the effect layer under the angle of effect shows a second color, which is in harmony with the color tone of the color layer.
  • the angle of effect of the first and second subregions is identical or there exists at least one viewing angle, below which the first and the second subregions at the same time show the hues described above; this angle is then called the effect angle.
  • Color shades which are in harmony with one another are understood to mean shades which contain at least one identical primary color. in particular, contain a same primary color as a main component and are thus similar. Furthermore, colors in harmony with one another generally have comparable brightness and / or color saturation, which is often the case, in particular, for the color layer according to the invention.
  • the hue in the second portion of the effect layer is preferably in harmony with the hue of the underlying color layer, the hue of the second portion of the effect layer and the hue of the first portion of the effect layer also produce a complementary contrast when viewed under the angle of effect.
  • the second subregion of the effect layer when viewed under the effect angle, preferably exhibits a hue in harmony with the underlying color layer, the color impression that the viewer already receives through the underlying color layer is intensified in this subregion by the effect layer.
  • a highly translucent, optically variable ink layer preferably an iriodine ink layer
  • a semitransparent or optionally even opaque color layer preferably a high opacity Colorcrypt or OVI color layer
  • gloss lacquer in the second subregion of the effect layer instead of an optically variable ink layer.
  • both subsections of the effect layer ideally have an identical effect angle and an identical angular range in which the respective color impressions of the two subregions of the effect layer can be perceived.
  • the color layer also has at least two partial areas, which impart different color impressions to a viewer.
  • the shades of the different subregions of the color layer are advantageously in harmony with each other.
  • the reflection spectrum of the color layer is reinforced by the reflection spectrum of the effect layer in the second subregion of the effect layer whose hue is in harmony with the hues of the color layer.
  • the slightly different hues of the different subregions of the color layer within the second subregion of the effect layer are added to a further, preferably much more intense hue.
  • the second subregion of the effect layer when viewed under the effect angle, outshines the small difference in hue of the underlying different subregions of the ink layer, so that a viewer perceives the different subregions of the ink layer only barely, preferably not at all, differently.
  • the hue of the first portion of the effect layer outshines differences in the reflection spectra of the various portions of the underlying color layer.
  • the hue of the first portion of the effect layer generates a complementary Contrast with the several harmonizing shades of the different parts of the color layer.
  • the differently colored subregions of the color layer can be produced, for example, by applying color layers with different color tones or by applying a color in different rasters, that is, in different raster patterns.
  • a certain point density of the grid points is provided in a subarea, while in another subarea a different point density is provided or the color is applied over the entire surface, so that when rasterized for a viewer a color impression with a hue results, which is a mixed hue from the for the halftone dots used color and the background color, for example, the substrate is.
  • the mixed color depends on the area proportions, for example, the dot density and dot size of the applied color.
  • the harmonious, differently colored portions of the color layer can also be created by using only a single color.
  • the various subregions are stacked in such a way that both the effect layer and the color layer (apart from any rastering, if appropriate) are applied over the entire area.
  • the various subregions are applied to partial printing operations of a single printing operation, which ensures a low pass tolerance of the subregions.
  • the different sub-areas of effect layer and color layer can be seen for a viewer only on the basis of their different shades.
  • the perceptibility of the partial areas of the color layer for the viewer under the effect angle further reduced by the above-described overexposure through the subregions of the effect layer under effect angle consideration. If the different subareas of the color layer form information for the viewer, then by tilting the security element, this information can be hidden for the viewer under the effect angle.
  • the first and the second partial area of the effect layer form a second information different from the first information of the color layer.
  • the first information of the color layer for example, in plan view is well visible and hidden under the effect angle and replaced by the second information of the effect layer, results for the viewer when tilting the security element, a digital information exchange between the first and second information and preferably a complete transition from the first information to the second information.
  • both information are displayed with similar design means, for example, each of two colors are constructed, including both the effect layer and the ink layer needs to have only exactly two subregions each. It is furthermore advantageous if both information items are shown, for example, with similar line thicknesses, that is to say with subregions of similar spatial dimensions.
  • both the information of the effect layer and the information of the color layer each have a meaning content and, for example, instead of an abstract representation each show an easily recognizable for a viewer motive.
  • the two motifs are clearly different from each other and also have a significantly different meaning content.
  • one of the two motifs may show a stylized object, such as a crown, an animal, an animal's head, a plant, a known landmark, or the like, while the other motif may have, for example, a numerical value or individual letters, preferably a single one Letters shows.
  • the fast, easy perceptibility of such motifs it is also advantageous if they have no fine structure.
  • an interference structure around such motifs may be provided which further reduces the perceptibility of the respective other motif to be hidden. It is also advantageous if both motifs have an approximately equal spatial size.
  • Such a motif change supports the perceptibility of the digital information change when tilting the security element between the first angle and the effect angle, because the viewer "holds tight” to such easily recognizable and easily interpretable motifs and thus possibly remaining, unwanted color differences of the motif to be hidden mentally suppressed. This is because when tilting next to the color change also takes place for the viewer subjectively dominant change of image motif.
  • the binary information or motif change takes place with tilting by only a few angular degrees, for example, tilting by 1 °, 2 °, 5 °, 10 ° or 20 °.
  • tilting by 1 °, 2 °, 5 °, 10 ° or 20 °.
  • the easy perceptibility and verifiability of the motifs can be further promoted by the fact that they are additionally printed in the vicinity of the effect or color layer again, which allows a self-verification. In such a case, the viewer can thus easily check whether e.g. the effect layer under the effect angle additionally shows the motif printed near the security element.
  • the color layer and the effect layer are arranged congruently one above the other. This results in a clearly demarcated, easily perceptible area for a viewer on the data carrier, which is affected by the digital information exchange or image motif change.
  • effect and color layers have a high register accuracy with each other, as can be achieved in partial printing operations of a single printing operation.
  • the color layer and the overlying effect layer are at least partially surrounded by a further color layer.
  • the surrounding color layer contains a recess and the outer contours of the color and effect layer are based on the outlines of the recess of the surrounding color layer.
  • effect and / or color layer and the surrounding color layer are in shock-to-impact with high registration accuracy.
  • the surrounding color layer also has at least two partial areas whose color shades are in harmony with one another in color and which preferably have similar design features, such as, for example, similar line thicknesses, such as the information in the color and / or effect layer.
  • the design means of the effect layer in the surrounding color layer are selectively continued, so that there is a creative relationship between the effect layer and the surrounding color layer.
  • the information or the motif of the effect layer forms a continuation of the design of the visible under each viewing angle surrounding color layer, which favors the perceptibility and recognizability of the subject of the effect layer when viewed under the effect angle for the viewer on the basis of targeted continuation.
  • the surrounding color layer due to its design, stands out clearly from the color layer arranged below the effect layer, that is to say from its information or motif, as a result of which its recognizability is also noticeable and perceptibility increased due to the contrast with the surrounding color layer.
  • the perceptibility of the inventive binary tilting effect between the respective motifs of the color layer and the effect layer is thus improved.
  • the design of the color layer underlying the effect layer is continued in the surrounding color layer, as a result of which the surrounding color layer clearly stands out from the subject of the effect layer.
  • the surrounding color layer clearly stands out from the subject of the effect layer.
  • At least one hue of the different subregions of the color layer has a secondary or tertiary color, ie a mixture of two or three primary colors of a color space.
  • a secondary or tertiary color ie a mixture of two or three primary colors of a color space.
  • This extends the range of hues which can produce a complementary contrast in the present sense. This is particularly advantageous if not every hue of the color spectrum is available as a hue of the first subregion of the effect layer, for example with a limited selection of corresponding pigment printing inks.
  • the present invention described digital information exchange does not require embossing of the security element.
  • the security element is additionally embossed in the area of the effect color, in particular blind embossed, whereby a different viewing angle and thus one of the other areas of different viewing impression arises in the region of the flank angle of the embossment.
  • at least one subregion of the color layer or a subregion of the effect layer contains at least one further substance, for example a luminescent substance, an infrared absorber, a thermochromic color, a marker, a cholesteric color and / or a magnetic pigment.
  • cholesteric colors usually have cholesteric liquid crystal pigments as an essential component.
  • additional effects can be generated and / or further authenticity features can be inserted into the security element, which if appropriate can only be recognized under special conditions and / or with auxiliary means.
  • such a further substance is present both in a partial area of the color layer and in a partial area of the effect layer.
  • these two subregions of the color layer and the effect layer complement each other to a third information, for example to a third motif.
  • the security element according to the invention contains additional information which can be recognized under suitable observation conditions, for example in the case of UV irradiation in the case of luminescent substances.
  • At least one of the two subregions of the color layer is formed by two mutually metameric colors.
  • the colors can be chosen so that the two metameric colors produce the same color impression in a conventional light, for example in natural light in a viewer, while they produce a different color impression only when illuminated with a special light source. This can be a hidden, imperceptible in ordinary handling Security feature to be created.
  • the effect layer is arranged spatially above the color layer and thus the viewing of the color layer through the effect layer occurs.
  • a reverse layer structure is also conceivable.
  • a transparent, semi-transparent or opaque effect layer with an overlying translucent, advantageously highly light-permeable color layer is used.
  • the security element according to the invention is arranged on a translucent, in particular transparent, substrate, such as a film element, both the arrangement of the color layer on the substrate with the effect layer applied above and the arrangement of the effect layer on the substrate with the color layer applied thereto come into consideration.
  • a security element with a translucent, in particular transparent, substrate may e.g.
  • the materials used for the film element are primarily the plastics PET (polyethylene terephthalate), PBT (polybutylene terephthalate), PEN (polyethylene naphthalate), PP (polypropylene), PA (polyamide), PE (polyethylene) into consideration.
  • the film may also be monoaxially or biaxially stretched.
  • the substrate material used for the application of the security element is any type of paper, in particular cotton paper.
  • paper which contains a proportion of polymeric material in the range of 0 ⁇ x ⁇ 100% by weight.
  • the substrate material of the data carrier may comprise a plastic film, e.g. a polyester film is.
  • the film may also be monoaxially or biaxially stretched. The stretching of the film, inter alia, leads to it receiving polarizing properties that can be used as another security feature.
  • the substrate material is a multilayer composite which has at least one layer of paper or a paper-like material.
  • Such a composite is characterized by an extraordinarily high stability, which is of great advantage for the durability of the substrate or data carrier.
  • the effect layer not only a single color producing a color impression can be used, but it is also possible to use mixtures of different colors with optionally different pigments and pigment types.
  • various iriodin pigments can be mixed and thus the desired hue, effect angle and effect angle range of the respective subregion of the effect layer can be adjusted in a targeted manner.
  • different Colorcrypt pigments, OVI pigments and STEP pigments can be mixed in order to produce a desired color impression.
  • these different types of pigment can be mixed with each other, so that in a portion of the effect layer, a suitable mixture of two or more Iriodin, Colorcrypt, OVI and STEP pigments are present.
  • these pigments can also be used with other pigments.
  • a mixture of iriodin and silver pigments is advantageous.
  • All materials used for the substrate, the color layer and the effect layer can have additives which serve, for example, as an authenticity feature.
  • luminescent substances which are preferably not visible in the visible wavelength range and for example transparent and in the non-visible wavelength range by a suitable tool, e.g. a radiation source emitting UV or IR radiation, can be excited and then display a visible or at least detectable with auxiliary luminescence.
  • the luminescent substances have suitable luminescence properties depending on the desired effect. This applies in particular to the excitation and emission wavelengths or spectra as well as the temporal decay behavior (fluorescence or phosphorescence) after switching off the excitation radiation. If several different luminescent substances are used, they can differ in their luminescence properties depending on the desired effect. For example, phosphorescent luminescent substances with different emission decay times can be used in the different subregions of the color layer and the effect layer.
  • a portion of the color layer or the effect layer may be divided into two contiguous or non-contiguous subregions, each having a color applied to each of the two subregions metameric to the color of the other subarea.
  • colors in the two sub-areas produce an identical color impression, while with appropriate exposure, for example with a light bulb, they produce different color impressions.
  • the effect layer can be glossy or matt.
  • either the effect layer can be made as such matt or glossy, which can be realized with suitable, for example, UV-crosslinked binders, such as monomers or prepolymers.
  • a gloss or matt lacquer can also be applied over the effect layer, for example by printing.
  • a portion of the effect layer is dull, while the other portion of the effect layer is glossy. This enhances the recognizability and perceptibility of the motif of the effect layer when viewed under the effect angle, while the visual impression of the two subregions of the effect layer hardly differs from the top view. This also makes the perceivability of the binary tilting effect according to the invention between the information of the color layer and the information the effect layer improves. If glossy or matt varnish is used to produce this effect in regions, then it is preferably printed in precise registration over the effect layer of the security element.
  • An exemplary formulation for a (water-based) gloss varnish that can be applied by flexographic printing comprises about 10 to 20 wt .-% of a polyurethane dispersion, about 1 wt .-% defoamer, about 1 wt .-% wax and about 78 to 88 wt .-% of a polyacrylate dispersion.
  • An exemplary formulation for a (water-based) matt lacquer which can be applied by the flexographic printing process comprises about 10 to 20% by weight of a polyurethane dispersion, about 1% by weight defoamer, about 1% by weight wax, about 8 wt .-% matting agent based on silica, about 2 wt .-% water and about 68 to 78 wt .-% of a polyacrylate dispersion.
  • the security feature is used to secure goods, valuables, data carriers and other objects, in particular for counterfeit protection.
  • the various subregions of the effect layer can in principle be applied using all standard printing methods, such as screen printing, flexographic printing, intaglio printing and intaglio printing methods.
  • screen printing flexographic printing
  • intaglio printing intaglio printing
  • intaglio printing preference is given to a screen or flexographic printing process.
  • the flexographic printing process is particularly preferred, in particular for paper-based substrates, since it allows a higher processing speed and essentially achieves the quality of a screen printing process when printing the effect inks.
  • the gravure printing method is particularly preferred, in particular for plastic film-based substrates (with and without pressure-receiving layer).
  • the different subregions of the ink layer can also be applied in principle with almost all common printing processes.
  • the surrounding further color layer can be applied with all common printing methods.
  • an indirect high-pressure process is used for this purpose in a so-called supersimultaneous pressure.
  • the supersimulting printing machines used allow a very accurate printing of all inks on one side as well as all inks from the front and back of the substrate / data carrier to be printed.
  • the indirect high-pressure process for the color layer and the flexographic printing process for the effect layer are used in a printing process which then comprises, for example, four partial printing steps (two partial printing steps for the color layer or effect layer respectively).
  • the indirect high-pressure process implemented in a super-simultaneous printing machine for the surrounding further ink layer, can also be combined with these printing steps, so that, for example, the respectively two partial areas of ink layer, effect layer and surrounding ink layer are printed in six partial printing processes in one printing process.
  • a substrate for example a security paper as a precursor for a banknote
  • a security paper as a precursor for a banknote
  • the surrounding further color layer is printed, then the color layer and subsequently the effect layer.
  • Fig. 1 is shown as a disk a banknote. This comprises a color layer 1 and a congruent overlying effect layer 2 and a surrounding further color layer 3 (see Fig. 2 ). Furthermore, the denomination in the form of the value "50" is applied to the banknote.
  • Fig. 2 shows a schematic cross section through a security element.
  • a color layer 1 with a plurality of abutting, opaque portions 1a, 1b is applied.
  • an effect layer 2 having a first portion 2a and a second abutting portion 2b is arranged on the ink layer 1.
  • Both the color layer 1 and the effect layer 2 each carry information in the form of a motif (see FIGS. 3a and 3b ), whereby the motives differ from each other.
  • plan view A Fig. 3a ; Viewing angle of 0 °
  • both sections 2a, 2b of the effect layer 2 are transparent, so that the information of the underlying color layer 1 is visible, while the information of the effect layer 2 is not visible.
  • the partial areas 1a and 1b of the color layer 1 are in color harmony with each other.
  • both subregions 2a, 2b of the effect layer 2 each show a hue, the hue of the first subregion 2a producing for the viewer a complementary contrast to the hues of the subregions 1a, 1b of the color layer 1 and the hue of the second subregion 2b is in harmony with the color tones of the subregions 1a, 1b of the color layer 1.
  • the safety element is exclusively the top view Motif of the color layer 1 recognizable, which is produced by two colors in harmony, but yet distinguishable by a viewer colors. In this case, the viewing may take place under illumination with diffused light.
  • the color impression of the underlying color layer 1 is ideally completely masked due to the transparent mirror gloss of the effect layer 2 or of the two effect colors used in the subregions 2a and 2b, so that in the ideal case only the subject of the overlying effect layer 2 is perceived by a viewer.
  • the matte / gloss effect is so dominant that the viewer primarily perceives and evaluates the information generated by the matte / gloss effect.
  • ideally directed light is used for illumination and the viewing and illumination angles are symmetrical with respect to the surface normal of the security element. Lighting and viewing angles are, for example, 30 °, 45 °, 60 ° or 75 ° with respect to the surface normal.
  • the congruent color and effect layers 1, 2 are surrounded by a directly adjoining further color layer 3.
  • This color layer 3 again comprises two partial areas 3a and 3b, wherein in the in Fig. 2 shown cross section only part 3a to the effect and color layers 1, 2 abuts. In another cross section, for example, subregion 3b would abut the color and effect layers 1, 2.
  • FIG. 2 schematically shown security feature when tilting between the top view A and the angle of effect B alternately the information of the ink layer 1 and the information of the effect layer 2, wherein to achieve a binary, complete information or image motif change for the different sections 1a, 1b, 2a, 2b 3a, 3b of the color layer 1, the effect layer 2 and the surrounding color layer 3, suitable colors with suitable color tones must be selected.
  • the names of the various inks refer to the PANTONE color spectrum.
  • Other color systems such as MKS and / or RAL, are of course also possible to designate the colors.
  • color green gold green contrast
  • color Iriodin lilac in harmony
  • the color iriodin copper complementary contrast
  • STEP copper-green in harmony
  • STEP inks are generally based on cholesteric liquid crystal pigments and show a color shift effect.
  • the color "STEP copper-green” shows the specified color.
  • partial area 2a also contains such a STEP color with a suitable complementary hue.
  • the perceptual color characteristic of the first variant of the first embodiment was quantified using a multi-angle measuring device (model X-Rite MA 98 of the manufacturer X-Rite) in the Lab color space.
  • a multi-angle measuring device model X-Rite MA 98 of the manufacturer X-Rite
  • illumination takes place at an angle of 45 ° to the surface normal of the security element, while a viewing along the surface normal occurs.
  • effect angle also takes place illumination at an angle of 45 ° to the surface normal, while the observation takes place at 30 ° to the surface normal and thus under a shifted by 15 ° to the gloss angle measurement angle.
  • the perceptual, subjectively perceived color difference of two colors results in a known manner from the Euclidean distance between two points in the Lab color space.
  • the parameters F1 and F2 as well as E1 and E2 respectively represent the colors used in the partial areas of the color layer and the effect layer.
  • F1 P 658 (blue)
  • F2 P 529 (purple)
  • E1 Iriodine lilac
  • E2 Colorcrypt gold-green "Top view” "Effect angle” L a b L a b
  • F1 81.58 -2.60 -7.75 85.64 -1.91 -6.91
  • 18.36 F2 75.36 17.38 -17.26 80.09 16.81 -15.48
  • F2 + E1 74.87 16.43 -15.56 91.11 28.81 -25.34
  • the color impression in the measuring arrangement "top view” depends only slightly on the respective color E1 or E2 of the effect layer.
  • the measured Lab color value in the measuring arrangement "effect angle” depends strongly on the color of the effect layer.
  • color layer 1 is in harmony in this and the exemplary embodiments mentioned above, but also the colors used for the surrounding color layer 3, which additionally supports the binary change of information for the viewer.
  • the color Iriodin lilac (complementary contrast) is used in the subarea 2a, and the color Colorcrypt gold-green (in harmony) in the subarea 2b.
  • STEP colors with respectively suitable shades are provided in partial area 2a and / or partial area 2b.
  • the respective Lab color values of the different regions of the security element were quantified with the method described in connection with the first exemplary embodiment: F1: P 611 (yellow) F2: P 466 (ocher) E1: Iriodin blue E2: Colorcrypt gold-green "Top view” "Effect angle" L a b L a b F1 83.52 -5.28 53.57 88.44 -5.11 46.57 F1 + E1 81.91 -1.35 32.93 99.53 -0.35 -11.75 F1 + E2 81.19 -4.17 49.02 109.89 -5.08 61.51 F2 80.08 1.90 18,89 84,54 1.89 17.93 F2 + E1 78.76 3.10 12,00 96.06 2.84 -22.17 F2 + E2 79.64 2.09 18.67 90.92 0.78 25.55
  • the color iriodin blue (complementary contrast) is used in the subregion 2a, and the color colorcrypt gold-green (in harmony) in the subregion 2b.
  • the color Iriodin lilac (complementary contrast) is used in the subarea 2a and the color Colorcrypt gold-green (in harmony) or Iriodin gold (in harmony) in the sub-region 2b.
  • STEP colors with respectively suitable shades are provided in partial area 2a and / or partial area 2b.
  • the respective Lab color values of the different regions of the security element were quantified with the method described in connection with the first exemplary embodiment: F1: P 164 (orange red) F2: P 129 (ocher yellow) E1: Iriodin blue E2: Colorcrypt gold-green "Top view” "Effect angle” L a b L a b F1 83.68 24,37 24.84 89.26 21.98 23.59 F1 + E1 82.87 23.71 15,95 95.71 20.13 -6.70 F1 + E2 81.86 21.66 22.79 109.97 10.98 44.31 F2 85.98 7.25 47.43 91.51 6.24 41.23 F2 + E1 84.67 10.69 29,66 97.77 9.46 1.02 F2 + E2 83.27 8.34 43.42 110.56 2.95 57.97
  • the color iriodin blue (in harmony) is used in the subregion 2b, and the color colorcrypt red-gold (complementary contrast) in the subregion 2a.
  • the color iriodin gold (complementary contrast) is used in the subregion 2a and the color Colorcrypt lilac-green (in harmony) in the subregion 2b.
  • STEP colors with respectively suitable shades are provided in partial area 2a and / or partial area 2b.
  • the flexographic printing ink for the effect layer of the embodiments 1 to 4, it should be noted that this is a water-based paint whose solids consist of polyacrylates and polyurethane (proportion about 40% by weight). The pigments are stirred in to about 20% by weight.
  • Diluent is water and used as solvent 1-methoxypropan-2-ol (together about 40 wt .-%).
  • the composition achieves a very high gloss.
  • auxiliary agents additives whose proportion is less than 1% by weight (for example wetting agents, pH neutralizers, thickeners, defoamers).
  • the high gloss achieved for the security element with these lacquers is generally also more stable than other color ranges of the value document, eg the banknote, which has a positive effect on the verification of the security element and thus the security against counterfeiting.
  • composition of an ink suitable for the color layer or the surrounding color layer about 1 to 20% organic colored pigments about 0 to 20% linseed oil about 20 to 98% Binders based on hydrocarbon-modified rosin resins and mineral oil / linseed oil about 0 to 2% Wax, eg micronized PE wax about 1 to 2% Driers based on cobalt / manganese octoate about 0 to 4% Mineral oil.
  • auxiliaries and solvents in particular water, may be contained in the printing inks.
  • the application of the effect layer is carried out with a special anilox roller, which was produced in an ART process.
  • ART Advanced Reverse Technology
  • a special raster geometry of the anilox roller is realized by means of a special engraving technique, so that even relatively large pigments of up to about 40 microns can be processed.
  • Fig. 3a the picture motif is shown, which is introduced as information in the color layer 1.
  • Fig. 3b the image motif is shown, which is introduced as information in the effect layer 2.
  • the motif of the color layer 1 represents a stylized crown and thus an easily recognizable motif with a meaning for the viewer.
  • the motif of the effect layer 2 is the value number "50", with an interference structure in the form of stripes additionally being around this value.
  • the image motifs in both layers are thus made up of two shades in each case, namely the shades of the subregions 1a and 1b of the color layer 1 and the shades of the subregions 2a and 2b of the effect layer 2. It is understood that instead of the in Fig. 3a shown crown also other motifs, such.
  • Such an embodiment of the effect layer 2 is in Fig. 3c shown.
  • the motif of the effect layer 2 in the form of the value "50" and the interference structure is formed by the subarea 2a (complementary contrast) and 2b (in harmony), the subregions 2a, 2b according to FIG Fig. 3c opposite to the subregions 2a, 2b according to FIG Fig. 3b are just reversed.
  • Corresponding considerations apply, of course also for the assignment of the colors to the subregions 1a and 1b of the color layer 1.
  • the effect layer 2 is applied directly to the substrate 4 and the ink layer 1 above the effect layer 2.
  • the substrate 4 is transparent or at least translucent and viewing the security feature is done through the substrate 4, as shown by the arrows A 'and B'.
  • semitransparent or opaque effect colors are respectively used for the effect layer 2 in the subregions 2a and 2b, whereas in each case highly translucent printing inks are used for the then overlying color layer 1. In this embodiment, the viewing is done directly on the security feature as before, and the substrate 4 can be opaque.
  • the partial regions 1a and 1b of the color layer 1 and / or the partial regions 2a and 2b of the effect layer 2 are not printed in shocks but are spaced apart from one another.
  • the hue of the underlying substrate 4 can be used to produce color impressions.
  • FIG. 4 Yet another variant shown in which the effect layer of subarea 2a (complementary contrast) and 2b (in harmony) in the form of the further portion 20a (complementary contrast) in the region of the surrounding ink layer 3 (the data carrier 4) is arranged, preferably in more detail Pass réelle to the color layer 3.
  • the individual lines of the subarea 20a continue in the area of the surrounding color 3, which is likewise designed as a line pattern. It understands itself, that the lines of the subregion 20a can also be arranged, for example, in exact registration on the surrounding ink layer. In principle, very different arrangements of effect layer 2 and surrounding color layer 3 are conceivable in order to reinforce the binary tilting effect in the perception of the viewer.
  • the motif of the effect layer 2 with the surrounding color layer 3 is meaningful, ie, for example, the motif of the effect layer is a sun and the rays of the sun are at least partially formed by the surrounding color layer.
  • the binary tilting effect of the security element according to the invention increases in the perception of the viewer and thus increases the security against counterfeiting.
  • At least one of the subregions of the color layer 1 and / or the effect layer 2 exhibits a luminescence.
  • This may be fluorescence or phosphorescence, the decay time of the emission being suitably chosen in the latter case.
  • the emission and absorption behavior of the luminescent substance or substances is suitably chosen so that a desired effect is achieved.
  • the overlying effect layer 2 must therefore not contain any UV absorbers.
  • UV absorbers based on titanium dioxide (TiO 2 ) included
  • the iriodine pigment rutile fine yellow or fine blue or Colorcrypt Gold Merck.
  • Suitable effect pigments for the effect layer 2 are, for example, liquid crystal pigments or Iriodin 4504 Lava red or Colorstream F10 Autum Mystery also from Merck.
  • both partial regions of the color layer 1 contain luminescent substances. These differ in their emission wavelengths or spectra and produce different color impressions when emitted.
  • the first part fluoresces, for example, in the red wavelength range, while the second portion fluoresces in the blue wavelength range.
  • the motif of the color layer 1 is refinished and for the overlying effect layer 2 suitable effect pigments must be selected which do not absorb the excitation radiation of the luminescent substances of the color layer 1.
  • the effect layer 2 has no luminescent substances.
  • precisely one of the two subregions of the effect layer 2 has a fluorescent luminescent substance.
  • the motif of the effect layer 2 is thus reproduced and is visible during the emission not only under the effect angle, but under all viewing angles.
  • the luminescent substance or the luminescent color used as such is, in the ideal case, completely transparent and does not have its own body color, at least in the visible spectral range. The luminescent substance is thus not visually recognizable and as long as the luminescent substance does not emit, the visual perceptibility of the effect layer 2 does not change.
  • the fluorescent color used is not completely transparent, it must be ensured by suitable choice of the ingredients in the other portion of the effect layer 2, that the two portions of the effect layer 2 outside the effect angle produce a sufficiently similar visual impression, so that these sub-areas do not distinguish can be. It is advantageous to use a luminescent substance which is as opaque as possible in order to minimize the perceptibility of the motif of the underlying color layer 1 as little as possible.
  • This variant of the fifth embodiment has the advantage that the effect pigments of the effect layer 2 can be UV-absorbing and thus result in fewer restrictions for the choice of the effect pigments than in the first and second variants of the fifth embodiment.
  • luminescent substances are provided in both partial regions 2 a and 2 b of the effect layer 2. These in turn differ in their emission wavelengths or spectra. In this case, a partial region in the red wavelength range fluoresces, while the other partial region of the effect layer 2 fluoresces in the blue wavelength range. Without excitation, both luminescent substances or luminescent dyes, as already described, ideally no own body color and are thus visually invisible, whereby the perceptibility of the motif of the underlying color layer 1 is maintained.
  • the ink layer 1 has no luminescent substances.
  • exactly one subarea of the color layer 1 and the effect layer 2 each comprise a luminescent substance.
  • Both luminescent substances have the same emission color and in the simplest case the same luminescent substance can be provided in both partial regions.
  • the two partial regions have different emission wavelengths or spectra and produce a different color impression from each other.
  • fluorescent luminescent substances can be provided in both partial regions of the color layer 1 and / or effect layer 2 in different wavelength ranges. In these variants, if necessary, the restrictions already discussed with regard to the choice of the ingredients of the effect layer should be taken into account.
  • a fluorescent luminescent substance is provided in a partial region of the ink layer 1, while a phosphorescent luminescent substance is provided in the other partial region of the ink layer 1.
  • the effect layer 2 contains no luminescent substances. Both luminescent substances of the color layer 1 are chosen so that they produce an identical color impression upon excitation and in particular show the same emission color at the same intensity, so that the color layer 1 appears as a closed surface during the excitation. After switching off the excitation, the corresponding subregion of the color layer is perceptible during the decay time of the phosphorescent luminescent substance. In other words, the motif of the ink layer 1 can be seen during the decay time of the phosphorescent luminescent substance.
  • one subregion of the color layer 1 is, for example, yellow fluorescent, while the other subregion of the color layer 1 is yellow phosphorescent.
  • the overlying effect layer 2 ideally contains no substances which absorbs the excitation radiation for the luminescent substances of the color layer 1.
  • Phosphorescent luminescent substances have the advantage that they are particularly suitable for machine selection, whereas in particular iriodin colors turn out to be due to their color change, that is to say due to the tilt effect between ideally complete transparency in plan view and the iridescent color impression when viewed under the effect angle Machine selection less suitable.
  • the fluorescent and phosphorescent luminescent substances are provided in the two subregions of the effect layer 2.
  • the color layer 1 has no luminescent substances.
  • essentially the same effects as with the sixth variant described above can be achieved, whereby here too there are fewer restrictions in the selection of the effect pigments of the effect layer 2 (as already described above).
  • a fluorescent luminescent substance is provided in a partial region of the color layer 1 and in a partial area of the effect layer 2 a phosphorescent luminescent substance.
  • the respective other subregions of color layer 1 and effect layer 2 have no luminescent substances.
  • the intensity of the fluorescent luminescent substance in the color layer 1 is significantly higher than the intensity of the phosphorescence of the luminescent substance in the effect layer 2.
  • the emission of the fluorescent subregion of the color layer 1 thus dominates.
  • the motif of the color layer 1 is recognizable during the excitation.
  • the motif of the effect layer 2 can be seen during the decay time of the phosphorescence in the effect layer 2.
  • a motif change takes place from the motif of the color layer 1 to the motif of the effect layer 2.
  • the high-intensity emitting fluorescent luminescent substance may also be provided in the effect layer 2, while the lower-intensity phosphorescent luminescent substance is provided in the color layer 1.
  • a first luminescent substance is provided in a partial region of the color layer 1 and a second luminescent substance in a partial region of the effect layer 2.
  • Both luminescent substances differ in their excitation spectrum such that they can be selectively applied.
  • one of the luminescent substances can be excited with short-wave light, while the second luminescent substance can be excited with long-wave light. Nevertheless, both excitation spectra can be in the UV range.
  • the motif of the color layer 1 or the motif of the effect layer 2 can thus be made selectively perceptible.
  • At least one partial area of color layer 1 or effect layer 2 contains an infrared-absorbing and emitting substance (referred to below as infrared absorber).
  • This infrared absorber is ideally not visually recognizable in the visible spectral range.
  • a partial region of the ink layer 1 contains such an infrared absorber.
  • the other part of the color layer and the effect layer 2 contain no infrared absorber. Accordingly, with suitable infrared excitation, the motif of the color layer 1 can be detected and evaluated by means of an infrared camera (for example an infrared converter camera).
  • the infrared absorber can also be provided only in a partial area of the effect layer 2 and then the motif of the effect layer 2 can be made recognizable.
  • a first infrared absorber is provided in a partial region of the ink layer 1, and a second infrared absorber is provided in a partial region of the effect layer 2.
  • no infrared absorber are provided in the other parts of the color layer 1 and effect layer 2 . Both infrared absorbers differ in their excitation wavelength. Accordingly, by suitable selection of the excitation wavelength, the motif of the color layer 1 or the motif of the effect layer 2 can be detected selectively with an infrared camera. For selective excitation, an infrared cut filter can be used, which is tuned to the respective excitation wavelength of the infrared absorber to be excited.
  • the motif of the color layer 1 or the effect layer 2 can be selectively made visible with an infrared camera by means of, for example, an infrared stop filter matched to the respective emission wavelength of the motif to be selected ,
  • thermochromic inks are provided in color layer 1 and / or effect layer 2, which in a predetermined Temperature range become transparent or invisible and outside of this temperature range have a body color.
  • one of the two partial areas of the color layer consists of a thermochromic color.
  • the other part of the color layer and the effect layer 2 have no thermochromic colors.
  • one part of the color layer 1 becomes transparent, and in this partial area the color impression is determined by the underlying substrate.
  • both subregions of the color layer 1 consist of different thermochromic colors, with the predetermined temperature ranges of the two thermochromic colors, in which they become transparent, at least overlapping and ideally equal.
  • thermochromic inks are provided in the color layer 1, as is the case in the first and second variant of the seventh exemplary embodiment, the thermochromic colors ideally have body colors which have a sufficiently high luminosity to make the motif of the color layer 1 recognizable.
  • one or both subregions of the effect layer 2 additionally have one or different thermochromic colors. Only when setting a temperature at which the thermochromic colors of the effect layer 2 become transparent, is then the observation of the previously described binary tilt effect, d. H. the change of motif between the motif of the color layer 1 and the motif of the effect layer 2 by changing the viewing angle possible. In other words, the effect of the effect layer 2 is hidden outside the predetermined temperature range. If both subregions of the effect layer 2 have the same thermochromic color, then the security element appears outside the predetermined region as a uniform, continuous surface. If two different thermochromic colors are selected for the two subregions of the effect layer 2, the motif of the effect layer 2 outside the predetermined range of thermochromic colors can be recognized under all viewing angles.
  • a partial area of the color layer 1 and a partial area of the effect layer 2 are each provided with thermochromic colors.
  • the binary tilt effect is visible only when setting a suitable temperature.
  • the corresponding portion of the color layer 1 is transparent in the predetermined temperature range and is opaque outside the predetermined temperature range of the thermochromic color, while in the portion of the effect layer 2 outside the predetermined temperature range of the thermochromic color of the effect layer 2, the body color of the thermochromic color is visible and within the predetermined temperature range is transparent and thus the viewing angle-dependent effect of the effect layer 2 is perceptible.
  • a partial area of the color layer consists of two subregions 1aa and 1ab, as shown in FIG Fig. 6 is shown. Both partial areas add up to the partial area 1a, as is known from the other exemplary embodiments. Both sub-areas 1aa and 1ab consist of two metameric colors. These generate an identical color impression upon exposure of a first light source, for example with white standard light D65, and are thus recognized as a uniform region. When viewed with a second light source, such as incandescent light, the two subregions 1aa and 1ab produce different color impressions. This feature can be used as an authenticity feature whose presence is not readily apparent.
  • markers or marker pigments are, for example, markers, hologram flakes or luminescent substances.
  • At least one of the partial areas of the color layer 1 or the effect layer 2 contains a cholesteric color. This at least one subregion is recognizable when viewed with a suitable polarization filter, optionally as a function of the orientation of the polarization filter.
  • both subregions of the color layer 1 consist of cholesteric colors which in each case generate different polarizations.
  • the effect layer 2 contains no cholesteric color. When viewed with the naked eye, this difference in the polarization of the light emitted by the color layer 1 is not visible. It only becomes visible when viewed using a suitable polarizing filter.
  • both partial regions of the effect layer 2 each contain a cholesteric color.
  • the two colors consist of cholesteric liquid crystal pigments, the helix of both cholesteric colors being different.
  • STEP-Watchers When viewing the effect layer 2 using a suitable polarization filter or a so-called STEP-Watchers, the subregions of the effect layer 2 become visible or invisible.
  • only one of the two subregions of the effect layer 2 is equipped with a machine-readable magnetic pigment.
  • both portions of the effect layer 2 are equipped with the same magnetic pigment. This results in the sum, corresponding to the area of the effect layer 2, a large, machine-readable area.
  • one subregion of the effect layer 2 is provided with a soft magnetic magnetic pigment, while the other subregion of the effect layer 2 is equipped with a hard magnetic magnetic pigment. This results in a machine-readable code or a machine-readable pattern.
  • Magnetic pigments generally have a slightly opaque body color, that is, an intrinsic color.
  • an intrinsic color In order to obtain a color impression of the underlying color layer 1 that is uninfluenced by the overlying effect layer 2 when the security element is viewed outside the effect angle of the effect layer 2, an identical intrinsic coloration is provided in both subregions of the effect layer 2. This is particularly necessary if, as in the first variant of the eleventh embodiment, only a portion of the effect layer 2 is provided with magnetic pigments or if, as in the third variant of the eleventh embodiment, different magnetic pigments are provided in the two subregions of the effect layer 2 .
  • One possibility for adjusting the intrinsic color is to additionally provide suitable organic pigments in one of the subregions. Alternatively, this can also be achieved with TiO 2 pigments.
  • a mixture of a pigment exhibiting an optically variable effect and e.g. an iriodin silver pigment may be e.g. have the composition mentioned above for the effect layer of the embodiments 1 to 4:
  • Fig. 3a illustrated motif of the color layer 1 is only one of many possible motifs that can be used both for color layer 1 and for the effect layer 2.
  • Fig. 7 is another example of a motif of the color layer 1, which advantageously with the in Fig. 3b shown motif of the effect layer 2 can be combined, a star shown. Accordingly, all so far in connection with the subject Fig. 3a described effects and advantages also by a color layer 1 with a motif as in Fig. 7 achieved reached.

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Abstract

L'invention concerne un élément de sécurité pour un support de données, cet élément de sécurité présente une couche de couleur (1) et une couche à effet (2) qui, considérée sous un premier angle (A), est essentiellement transparente et qui, considérée sous au moins un deuxième angle (B) dit à effet, présente une teinte, la teinte de la couche à effet produisant au moins dans une première zone partielle (2a) un contraste complémentaire à la teinte de la couche de couleur (1).

Claims (15)

  1. Elément de sécurité pour un support de données, comprenant une couche d'encre (1) et une couche à effet (2), la couche à effet (2) étant essentiellement transparente lorsqu'elle est observée sous un premier angle (A) et présentant un ton lorsqu'elle est observée sous au moins un second angle dit angle à effet (B), et la couche à effet (2) comprenant des pigments d'interférence à une ou plusieurs couches ou des pigments cholestériques à cristaux liquides, caractérisé en ce que la couche d'encre (1) comprend au moins deux zones partielles (1a, 1 b) offrant des impressions de couleur différentes, les tons des impressions de couleur différentes des deux zones partielles comportant la même couleur primaire et étant ainsi en harmonie les uns avec les autres et les deux zones partielles se différenciant de préférence par le tramage ou par le ton de la couche d'encre appliquée et en ce que le ton de la couche à effet (2) génère au moins dans une première zone partielle (2a) un contraste complémentaire aux tons de la couche d'encre (1).
  2. Elément de sécurité selon la revendication 1, caractérisé en ce que, sous l'angle à effet, la couche à effet présente dans une seconde zone partielle (2b) un ton qui comporte la même couleur primaire que le ton de la couche d'encre et est ainsi en en harmonie avec le ton de la couche d'encre.
  3. Elément de sécurité selon une des revendications 1 ou 2, caractérisé en ce que la couche d'encre (1) et/ou la couche à effet (2) sont appliquées à pleine surface.
  4. Elément de sécurité selon les revendications de 1 à 2 ou de 1 à 3, caractérisé en ce que la couche d'encre (1) comprend une première information, notamment un premier motif, qui comprend les au moins deux zones partielles de la couche d'encre, et en ce que la couche à effet (2) comprend une seconde information, notamment un second motif, qui comprend au moins la première et seconde zone partielle de la couche à effet, la couche d'encre (1) et la couche à effet (2) étant disposées de préférence de manière congruente l'une sur l'autre.
  5. Elément de sécurité selon la revendication 4, caractérisé en ce qu'un contour de la couche d'encre (1), de la couche à effet (2) et/ou de zones partielles (1a, 1b, 2a, 2b) de la couche d'encre ou couche à effet correspond au moins partiellement à un évidement dans une couche d'encre (3) supplémentaire enceignante et est de préférence agencé bord à bord avec la couche d'encre enceignante.
  6. Elément de sécurité selon la revendication 5, caractérisé en ce que la couche d'encre (3) supplémentaire enceignante comprend au moins deux zones partielles (3a, 3b) offrant des impressions de couleur différentes, les tons des impressions de couleur différentes des au moins deux zones partielles comportant la même couleur primaire et étant ainsi en harmonie les uns avec les autres.
  7. Elément de sécurité selon une des revendications de 1 à 6, caractérisé en ce qu'au moins un ton de la couche d'encre (1) est une couleur secondaire ou tertiaire.
  8. Elément de sécurité selon une des revendications de 1 à 7, caractérisé par une empreinte dans la zone de la couche à effet (2).
  9. Elément de sécurité selon une des revendications de 1 à 8, caractérisé en ce qu'au moins une zone partielle de la couche d'encre (1) ou de la couche à effet (2) comporte au moins une substance supplémentaire, notamment une substance luminescente, un absorbeur d'infrarouge, une encre thermochrome, une substance de marquage, une encre cholestérique et/ou un pigment magnétique, de préférence respectivement une zone partielle de la couche d'encre (1) et de la couche à effet (2) comportant une substance supplémentaire et les deux zones partielles se complétant de manière à former une nouvelle information, notamment un nouveau motif.
  10. Elément de sécurité selon une des revendications de 1 à 9, caractérisé en ce qu'au moins une des zones partielles de la couche d'encre (1) est constituée par deux encres métamères entre elles.
  11. Elément de sécurité selon une des revendications de 2 à 10, caractérisé en ce qu'une zone partielle de la couche à effet (2) apparaît mate et que l'autre zone partielle de la couche à effet apparaît brillante.
  12. Support de données comprenant un élément de sécurité selon une des revendications de 1 à 11.
  13. Procédé de fabrication d'un élément de sécurité, comprenant les étapes suivantes :
    - mise à disposition d'un substrat (4);
    - application d'une couche d'encre (1) qui comprend au moins deux zones partielles (1a, 1 b) offrant des impressions de couleur différentes, les tons des impressions de couleur différentes des deux zones partielles comportant la même couleur primaire et étant ainsi en harmonie les uns avec les autres et les deux zones partielles se différenciant de préférence par le tramage ou par le ton de la couche d'encre appliquée; et
    - application d'une couche à effet (2) qui comprend des pigments d'interférence à une ou plusieurs couches ou des pigments cholestériques à cristaux liquides et qui, lorsqu'elle est observée sous un premier angle, est essentiellement transparente, et qui, lorsqu'elle est observée sous au moins un second angle dit angle à effet, présente un ton qui génère au moins dans une première zone partielle (2a) un contraste complémentaire aux tons de la couche d'encre.
  14. Procédé selon la revendication 13, caractérisé en ce que l'application de la couche d'encre (1) et l'application de la couche à effet (2) sont respectivement des opérations partielles dans une opération commune d'impression et/ou en ce que l'application de la couche d'encre (1) a lieu par impression offset ou par impression en relief indirecte et l'application de la couche à effet (2) a lieu par flexographie.
  15. Procédé selon une des revendications de 13 à 14, caractérisé par l'étape de l'application d'une couche d'encre (3) supplémentaire enceignante, de préférence par procédé offset ou impression en relief indirecte dans un dispositif d'impression supersimultanée.
EP09778161A 2008-08-28 2009-08-27 Kinégramme binaire Active EP2318884B1 (fr)

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DE102008044809A DE102008044809A1 (de) 2008-08-28 2008-08-28 Binäres Kippbild
PCT/EP2009/006225 WO2010022952A1 (fr) 2008-08-28 2009-08-27 Kinégramme binaire

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BR (1) BRPI0917374A2 (fr)
CA (1) CA2735297C (fr)
DE (1) DE102008044809A1 (fr)
PL (1) PL2318884T3 (fr)
RU (1) RU2538865C2 (fr)
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ZA (1) ZA201100947B (fr)

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DE102010022123C5 (de) * 2010-05-20 2023-03-02 Leonhard Kurz Stiftung & Co. Kg Sicherheitselement
DE102011100979A1 (de) * 2011-05-10 2012-11-15 Giesecke & Devrient Gmbh Sicherheitselement und mit demselben ausgestatteter Datenträger
RU2527791C1 (ru) * 2013-07-18 2014-09-10 Федеральное государственное унитарное предприятие "Гознак" (ФГУП Гознак") Многослойная защищенная композиция (варианты) и изделие из такой композиции
FR3015357B1 (fr) 2013-12-19 2016-01-29 Arjowiggins Security Article de securite
DE102014007474A1 (de) * 2014-05-21 2015-11-26 Giesecke & Devrient Gmbh Verfahren zur Herstellung einer Folie, die als Träger für elektronische Bauelemente dient
MDS20170076U2 (ro) * 2014-12-01 2017-11-30 Ирина МИРОЧНИК Procedeu de autentificare a produselor de consum
GB2538491B (en) * 2015-05-11 2017-12-06 De La Rue Int Ltd Security documents and methods of manufacture thereof
FR3080325B1 (fr) * 2018-04-19 2020-10-02 Crime Science Tech Dispositif de marquage optique
EP4085880A1 (fr) * 2021-05-02 2022-11-09 Corbett Lair, Inc. Dilatateur nasal

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CH672687A5 (fr) 1987-11-20 1989-12-15 Lipatec Ets
ES2070474T3 (es) 1990-12-12 1995-06-01 Sihl Zurcher Papierfabrik An D Papel de seguridad para billetes de banco o similares y procedimiento para su fabricacion.
DE19541064A1 (de) * 1995-11-03 1997-05-07 Giesecke & Devrient Gmbh Datenträger mit einem optisch variablen Element
DE19544130A1 (de) 1995-11-27 1997-05-28 Giesecke & Devrient Gmbh Datenträger mit optisch variabler Farbe
DE10243863A1 (de) * 2002-08-13 2004-02-26 Giesecke & Devrient Gmbh Datenträger mit einem optisch variablen Element

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AU2009287037A1 (en) 2010-03-04
EP2318884A1 (fr) 2011-05-11
BRPI0917374A2 (pt) 2015-11-17
ZA201100947B (en) 2011-10-26
PL2318884T3 (pl) 2012-10-31
CA2735297C (fr) 2016-10-04
RU2538865C2 (ru) 2015-01-10
AU2009287037B2 (en) 2013-08-29
DE102008044809A1 (de) 2010-03-04
WO2010022952A1 (fr) 2010-03-04
CA2735297A1 (fr) 2010-03-04
RU2011111586A (ru) 2013-10-20

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