EP1771307A1 - Support a imprimer comportant un champ de masquage destine a cacher un motif d'informations confidentiel - Google Patents

Support a imprimer comportant un champ de masquage destine a cacher un motif d'informations confidentiel

Info

Publication number
EP1771307A1
EP1771307A1 EP05754456A EP05754456A EP1771307A1 EP 1771307 A1 EP1771307 A1 EP 1771307A1 EP 05754456 A EP05754456 A EP 05754456A EP 05754456 A EP05754456 A EP 05754456A EP 1771307 A1 EP1771307 A1 EP 1771307A1
Authority
EP
European Patent Office
Prior art keywords
layer
camouflage
field
carrier
ink
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.)
Withdrawn
Application number
EP05754456A
Other languages
German (de)
English (en)
Inventor
Jules Fischer
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.)
Fofitec AG
Original Assignee
Fofitec AG
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 Fofitec AG filed Critical Fofitec AG
Publication of EP1771307A1 publication Critical patent/EP1771307A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D15/00—Printed matter of special format or style not otherwise provided for
    • B42D15/02—Postcards; Greeting, menu, business or like cards; Letter cards or letter-sheets
    • B42D15/025—Postcards; Greeting, menu, business or like cards; Letter cards or letter-sheets with peel-away layer hiding information

Definitions

  • the present invention relates to a print carrier with camouflage field on which with normal printing ink, in particular using today's conventional laser or inkjet printer, a e.g. Information pattern consisting of characters can be imprinted in such a way that, against the background of the camouflage field, it can only be recognized by the naked eye after certain manipulations have been carried out. Accordingly, the term "normal printing ink” is also intended to include the toner used by laser printers or the ink used by ink-jet printers.
  • Such print media are used to PIN codes of bank or credit cards, passwords or similar sensitive information by mail to their
  • a print carrier of the type mentioned is known from WO 99/24267 A1.
  • a transparent film on another substrate such as a paper sheet is arranged in the area of a previously printed on it camouflage field.
  • the confidential information is printed on the upper surface of the film. Against the background of the camouflage field visible through the film, it can not be read, at least with the naked eye if suitably executed. It only becomes recognizable when the film and the substrate are separated, this separation leaves the irreversible traces necessary for the Maniplationsindativativity.
  • EP 1 120 291 A2 the confidential information becomes readable by decoloration of an ink used for the camouflage field under the action of heat.
  • EP 1 120 291 A2 does not contain any details of a suitable printing ink. It is questionable whether the apparently desired thermochromatic effect can be sufficiently irreversibly realized in order to make manipulations clearly recognizable.
  • WO 2004/106085 A1 proposes to irreversibly decolorize the printing ink of the camouflage field by the action of a chemical reagent.
  • the Tarnfeld is in the prior art embodiments, a so-called sea of numbers, which is made by overprinting different characters and forms a disorderly, dark background in which the characters of the confidential information pattern for the naked eye are no longer visible or disappear into it. With the use of technical aids, however, it is still possible in the known embodiment to read the confidential information without this being subsequently recognizable.
  • EP 1 001 884 B1 It is known from EP 1 001 884 B1 to improve this type of camouflage by printing the areas forming the confidential information pattern with an overlap of less than 100%, which is achieved, for example, by screening with resolution of the characters into a multiplicity of small dots can be.
  • EP 1 001 884 B1 additionally proposes to also apply a grid of small dots in the camouflage field. Even if, for example, with the help of a microscope, the individual points should be recognizable, in this case there is the difficulty of assigning them to the confidential information on the one hand or the camouflage field on the other hand.
  • the present invention has the object of further improving the security of the confidential information in the case of a printing carrier with camouflage field of the type mentioned at the outset
  • the first of the features of the invention is that the camouflage field contains irregularly distributed color dots with irregular diameters in the large range between 20-400 ⁇ m and with a total area between 0 3 - 0 5 cm 2 per cm 2
  • This feature further improves the camouflage improvement already known from EP 1 001 884 B1 by screening the confidential information as well as by halftone dots even in the camouflage field. It has been shown that the halftone dots of the confidential information in EP 1 001 884 B1 alone due to their geometric arrangement of the yes also geometrically arranged halftone dots in the camouflage field with sufficient magnification can be discriminated for example under a microscope.
  • irregular arrangement of color dots with irregular diameters of said variable type in the camouflage field and with greater density than the density with which the halftone dots of confidential information are usually printed this discrimination is, however, as good as no longer possible.
  • the density of the color points may be chosen to for example, that the number of color dots in the size range between 50-100 microns 2000-5000 per cm 2, in the size range 100 - 200 microns 500 - 1000 per cm 2, and in the size range between 200-400 microns 200 - 500 per cm 2 .
  • the camouflage field is printed with a liquid ink, wherein the color dots are formed by the ink mixed particles.
  • the color dots are formed by the ink mixed particles.
  • a liquid printing ink for camouflage printing can be used as described in WO 2004/106085, which, in contrast to normal printing ink, in particular the toner of a laser print or the ink of an inkjet printer, can be irreversibly bleached using a chemical decolorizing agent is.
  • the special printing ink may e.g. by reaction of the products CB and CF as used for copying papers and well known to those skilled in the art.
  • Desensitizing printing ink for the product CF as used in printing technology
  • bleaching agents such as those used for bleaching paper and textiles, including commercial Javel water or the product DIRAXON S12 from CECA (F -92062 LA DEFENSE), CAS No. 61790-85-0
  • the particles admixed for the production of the color dots in the camouflage field of the printing ink are preferably porous and have an approximately corresponding color due to the absorption of ink.
  • Suitable particles are known from so-called matting agents and can consist of amorphous silica, for example. These particles, however, have only one grain size between them 5 - 7 microns on color dots with diameters in the desired range between 50-400 microns are still formed by agglomeration of these particles By not all the particles used to agglomerate the desired color dots in the specified large area resulting in larger numbers and smaller color dots, resulting in the desired camouflage effect but hardly contribute
  • the layer thickness of the camouflage field layer are subject to technical limitations due to the application quantity, drying and undesired imprinting or doubling of the pressure in the stack or on the roll.
  • the color intensity of the camouflage field can alternatively or additionally also be increased according to the third of the inventive solution features by concentrating at least 50% of the printing ink with which the camouflage field is printed in a camouflage field layer. Preferably even at least 90% of the printing ink is concentrated in the camouflage field layer.
  • the desired concentration of the printing ink can be achieved in one
  • Camouflage layer itself on per se absorbent paper through a barrier layer, which is dense for the ink at least in the said percentage.
  • the barrier layer may for example consist of a material, as it is commonly used for the coating of so-called coating base papers. These coatings applied, for example, by brushing also serve to obtain a surface that is as closed as possible and also smooth, and consist, for example, of China Clay, chalk, casein or plastic dispersion Despite their tightness and smoothness, they still have good anchoring properties for printing inks
  • the printing ink for the camouflage printing is preferably optically matted in order to avoid the recognizability of a printed information pattern by gloss effects. It is particularly advantageous to adapt the ink in color and in terms of its gloss to conventional toner as used by laser printers
  • the camouflage field can be at least partially and / or together with other layers with a Ablosekraft between 0 5 N / 50 mm and 2 N / 50 mm according to the Finat Test Method Nr 1 remove (using the Finat test method No. 1 see also www finat com)
  • the Ablosekraft amounts to about 1 N / 50 mm
  • the camouflage pressure or the camouflage field layer can be arranged on an intermediate layer which, if subjected to a corresponding load, has a cohesive failure in itself or an adhesion break to an adjacent one Suffers interface
  • the above-mentioned barrier layer may optionally be used in combination with a release layer
  • thermochromatic reagent which irreversibly discolored when exposed to heat from a temperature of 140 ° Suitable reagents are state of the art and commercially available
  • This feature takes into account the fact that it is possible in the known print carriers of the type considered with the aid of an iron to read the confidential information, provided that it is printed with toner of a laser printer For this purpose, it is sufficient to put a thin smooth paper over the print and rub it with the iron until a readable impression is made on the paper.
  • the impression results from the fact that toner is thermoplastic and begins to soften again at a certain temperature.
  • the characteristic according to the invention became the reagent in such a manipulation attempt discolour and make it recognizable
  • the specified limit temperature of 14O 0 C for the reagent used results from the fact that this just barely discolored at the usual fixing temperature for the toner in a laser printer
  • thermochromatic reagent is arranged on the back of a carrier layer carrying the camouflage field on the front and can thus not impair the camouflage pressure and the ink used therefor and, if preferred, chemically decolonable ink
  • the print carrier is alternatively or additionally provided with a solvent reactive reagent which irreversibly discolors in a solvent atmosphere.
  • a solvent reactive reagent which irreversibly discolors in a solvent atmosphere.
  • This feature takes into account the fact that certain printing inks, such as the chemically decolonable printing ink preferably used for the camouflage field, reversibly decolorize in cold solvent vapor, for example in acetone vapor, and thereby temporarily make the confidential information visible By irreversible discoloration of the reagent used, such a manipulation attempt would also be recognizable later
  • the solvent-reactive reagent can also be arranged on the back of a carrier layer bearing the camouflage field on the front side
  • the decolorizing agent can advantageously be kept ready on the printing substrate and / or even integrated in its structure
  • FIG. 2 shows a correspondingly enlarged photographic illustration of the confidential information pattern of FIG. 1 in front of a uniformly light background in the form of the number "2", FIG.
  • FIG. 3 shows a basic embodiment of a printing carrier according to the invention
  • FIG. 5 shows an embodiment of a printing carrier according to the invention with a barrier layer adjacent to the camouflage field layer
  • FIG. 6 shows an embodiment of FIG. 5 with a torn barrier layer
  • FIG. 7 shows an embodiment of a printing carrier according to the invention with a barrier layer and a separating layer adjacent thereto
  • FIG. An embodiment of an inventive print carrier with a coating which irreversibly discolored under the action of heat and / or in a solvent atmosphere
  • Print carrier with a coating which irreversibly discolors under the action of heat and / or in a solvent atmosphere
  • a print carrier according to FIG. 5 additionally provided with a protective layer on the front side and additionally provided on the back with a pressure-sensitive adhesive layer and a cover layer for the pressure-sensitive adhesive layer,
  • Decoating agent, back pressure-sensitive adhesive layer and a covering layer for this pressure-sensitive adhesive layer Decoating agent, back pressure-sensitive adhesive layer and a covering layer for this pressure-sensitive adhesive layer
  • the print carrier according to FIG. 12 after removal of the cover layer, adhered to a substrate and provided with a printed information pattern,
  • FIG. 13 shows the print carrier after detachment of an upper complex with the information pattern
  • FIG. 13 after turning and reincorporation of the complex shown in FIG. 14 on the remaining lower complex with the integrated decoupling agent, FIG.
  • FIG. 16 shows the substrate of FIG. 16 with the camouflaged part part slipped out and pushed under the reactive label
  • FIG. FIG. 18 shows the substrate of FIG. 17 after decoupling of the camouflage field
  • FIG. 19 shows in section (A-A) the substrate of FIG. 16, FIG.
  • FIG. 1 The photographic image of Figure 1 shows a small, but greatly enlarged section of a formed in the manner of a numerical camouflage field according to the invention on which in Fig. 2 in front of a uniformly bright background shown and resolved into individual, spaced apart grid points digit "2" in the same
  • the figure "2" in Fig. 1 is not visible.
  • the good small camouflage is clearly illustrated by the many small dots of varying size distributed unevenly over the camouflage field in FIG.
  • the print carrier can simply have a carrier layer 30 which is printed on one side with a camouflage field 10 using a printing ink which can be bleached with a chemical decolorizing agent and mixed with particles of the type described above schematically represented also a directly on the camouflage field z B with toner of a laser printer printed confidential information pattern M.
  • a carrier layer 30 may be, for example, a paper or foil layer
  • Figure 3 the individual layer thicknesses shown greatly exaggerated thick, which also applies to all other sectional views
  • the camouflage field 10 is constructed from two layers 11 and 12 printed on top of one another.
  • the carrier layer 30 consists, for example, of absorbent paper.
  • a barrier layer 20 prevents the printing ink of the camouflage field layer from penetrating into the carrier layer during printing. The ink thus remains substantially concentrated in the camouflage field layer, producing a pressure-intensive image there and There is also good and quickly accessible there for the required for their Decolo ⁇ réelle chemical Decolo ⁇ réellesstoff
  • At least one of the layers of the print carrier according to the invention is advantageously designed so that it has only a small inner cohesion and suffers a cohesive failure, if it should be attempted to lift the confidential information pattern z B by means of an adhesive strip
  • Cohesion failure is shown in FIG. 6 by the example of the barrier layer 20 which is torn in two in FIG. 6. Instead of a cohesive failure, an adhesion break z B at a separation layer 31, as shown in FIG. 7, also serves the same purpose
  • the print carrier is otherwise still formed in the manner of a self-adhesive label on the back of the carrier layer 30, he is provided with a pressure-sensitive adhesive layer 60 and adhered to a larger substrate 70 by means of this with the substrate 70 may in particular a standard paper sheet z B in A4 format act
  • FIGS. 8-10 show a print carrier in such a configuration on a substrate 70, wherein additionally a coating 40 or 50 is additionally provided on the back side of the carrier layer 30.
  • the coating 40 is a thermochromatic reagent, which starts from a temperature of about 140 0 C irreversibly changes color when coating 50 is it is a solvent-reactive reagent which in a Losungstoffatmospare such B in acetone vapor irreversibly changes color through the Verfarbungs clear experiments are seen partly reflect the confidential information by Bugein on another transmitter or by reversible Decolo ⁇ eren of the ink briefly to make the two reagents may alternatively be present next to each other or mixed with each other It could also be used reagent that has both properties simultaneously
  • the camouflage field layer 10 is in the embodiment of FIG
  • the pressure-sensitive adhesive layer 60 is flat-shaped somewhat smaller than the carrier layer, whereby its edge strip can be raised and the coating 40/50 can be viewed directly
  • a punched-out portion 71 is mounted in the substrate 70 below the print carrier, whereby the view of a portion of the coating 40/50 is also released
  • the printing ink used for the printing of the camouflage field can hardly be knocked downwards, as was explained above for normal paper.
  • the higher-boiling, more volatile constituents of the printing ink remain in the camouflage field layer as a result Wiping and scratching resistance of this layer may be impaired.
  • unwanted effects such as the so-called ghost effect can occur during further processing.
  • the ghosting effect is a technical term for a print in which no printing form is present and where by the
  • the print carrier can be actively dried immediately after the application of the ink, whereby especially the higher-boiling components of the printing ink used can be effectively removed
  • a particularly effective and intensive drying results for example, using high-speed hot air
  • Floating dryers are used, which build from both sides of the web high-speed hot air cushion and keep the web without Walzenbowung in suspension
  • the printing ink is formulated with very low-boiling organic solvents or water, or a reactive ink is additionally used, such as a two-component system with resin and hardener. It could also be a 100% solids Solid-body formulation can be chosen as a radiation-curing system with or without photoinitiators (UV or EB radiation hardening)
  • the camouflage field layer 120 is provided on the surface with a transparent protective layer 110 increasing the abrasion and scratch resistance of the printing ink, as shown in FIG. 11.
  • the layers 130, 140 and 150 correspond to the layers
  • the layer 190 is a masking paper z B in the form of a silicone paper.
  • the protective layer 110 must, of course, be sufficiently transparent to the decolorizing agent This may be due to a porous or lattice-like
  • this layer should be very small and, for example, only 1 - 2 microns
  • the upper four layers 110-140 correspond to those of FIG. 11
  • the layers 130 and 140 are transparent here.
  • the carrier layer 140 may, for example, comprise a plastic film, in particular a preferably slightly matt, stretched polyester film a thickness of about 50 microns
  • a further carrier layer 170 is provided in the embodiment of FIG. 12, and between the two carrier layers 140 and 170 are two outer, preferably strip-shaped pressure-sensitive adhesive layers 151 and 152 which in turn enclose a preferably strip-shaped layer 160 between them, which encloses the decoupling agent z B encapsulated in liquid form in microcapsules which can be destroyed under pressure
  • the further carrier layer 170 is preferably a film layer of only a very small thickness, such as 12 ⁇ m
  • a further pressure-sensitive adhesive layer 180 is present, which in turn is provided with a removable cover layer 190
  • the cover layer 190 is selected to be the same size as other layers of the print carrier
  • the print carrier of FIG. 12 could also be a stripe-shaped material with a uniform structure that extends endlessly perpendicular to the plane of the paper, from which individual print carriers could be obtained by stitching, which is then transferred to a so-called Web-F ⁇ n ⁇ sh ⁇ ng plant could be mounted on a running paper web or on running sheets or forms From such a Endlosmate ⁇ al could be produced by a lattice punching a label material
  • the respective Endlosmate ⁇ alien are in any case by the cover 190 on itself aufrollbar and are preferably on roll produced and processed
  • FIG. 13 shows the print carrier of FIG. 12 after the covering layer 190 has been removed and pasted on a substrate in the form of a paper sheet 200, a confidential information pattern M (reversed page) already being printed on its upper side
  • pressure-sensitive adhesive layers 151 and 152 and the layer 160 with the Decolo ⁇ mecanicsstoff are strip-shaped is advantageous in their production They can be produced efficiently by continuous coating by coating a moving web (support layer 170)
  • the two layers 170 and 180 may also be omitted, because then the layer 160 containing the decolorizing agent is already protected against evaporation by the plastic substrate the Decolo ⁇ réellesffens is protected
  • the print carrier in the form of a substrate 210 which is only partially illustrated in FIGS. 16-18, is, for example, a sheet of A4-sized paper, as can be processed, in particular, in commercially available laser or inkjet printers
  • the substrate 210 is provided with a camouflage field 220 and with a reactive label 230
  • camouflage field layer 222 of the camouflage field 220 is printed using a special ink which, in contrast to normal ink under Use of a chemical Decolo ⁇ réellesmittels in an irreversible manner bleachable
  • the camouflage field 220 is arranged on a part 212 of the substrate 210 which is delimited by a perforation 21 1 from the rest of the substrate 210.
  • the perforation 21 1 may be, for example, a land or a micro-perforation by severing the perforation 211
  • the part 212 comprises a first area 214 substantially corresponding to the camouflage field 220 and a second area 15 which can be used as a grip area and having a somewhat larger width.
  • the contours of the part 212 are rounded, see FIG that the release of the part 212 does not lead to undesirable cracking
  • the reactive label 230 comprises a transparent carrier layer 232, made of polyester, which carries on its underside, ie its side facing the substrate 210, a layer 233 which contains a liquid decolorizing agent for bleaching the special printing ink of the tamse field 222, eg in microencapsulated form the support layer 232 on both sides of the layer 233 on the substrate 210 by two strip-shaped adhesive layers 234 and 235
  • the layer 233 itself is not connected to the substrate 210.
  • the adhesive of the adhesive layers 234 and 235 is selected and / or adjusted so that the Carrier layer 232 non-destructive leave not detach from the substrate 210
  • the part 212 with the camouflage field 220 is removed from the composite with the remaining substrate 210 and then pushed under the carrier layer 232 of the reactive label 230 in that the camouflage field 220 or the tamfield layer 222 with which the
  • Decoating agent-containing layer 233 comes into direct overlap At the location of the substrate 210, at which the part 12 wasMAgelost, remains a relatively large hole 213 back
  • FIG. 17 shows the substrate of FIG. 16 with part 21 stripped out and subsequently with its region 214 between the support layer 232 of the reactive label 230 and the substrate 210. Insertion is possible because the layer 233, as already mentioned, is not connected to the substrate 210 is also the is The distance between the two pressure-sensitive adhesive layers 234 and 235 is slightly larger than the width of the region 214.
  • the insertion of the region 214 of the part 212 between the support layer 232 and the substrate 210 is also simple and convenient, because the part 212 at its region 215 according to Art
  • the region 215 has a slightly larger width than the region 214, it is more advantageous at the upper end of the two pressure-sensitive adhesive layers 234 and 235 each a stop, by which it is ensured that the camouflage field 220 in exact overlap with the layer 233 comes to cher
  • FIG. 18 shows the state after a deflection of the camouflage field and with an information pattern M which has become recognizable in the bleached area
  • a very thin film with a thickness in the range of only 36 microns is used for the support layer 232.
  • a comparatively low pressure on the surface of the film is sufficient to release the decolorizing agent.
  • the use of such a thin film is possible because it after bonding on the substrate 10 no longer needs to be handled freely
  • FIG. 19 illustrates, in a section A - A, the layer structure of the substrate of FIG. 16 as described above.
  • the confidential information pattern M which is not recognizable in the plan view of FIG. 16, is printed on the surface of the camouflage field 222
  • FIG. 20 shows the layer structure of the substrate according to FIG. 17 in a section B - B, ie how it results after detaching the part 212 with the camouflage field 220 from the composite with the remaining substrate 210 and then inserting the part 212 under the support layer 232 of the reactive label 230
  • FIG. 21 shows in a representation corresponding to that of FIG. 19 still another preferred embodiment of a substrate according to the invention in which both the camouflage field 220 and the reactive label 230 are widened by further layers, which make it possible, inter alia, to completely prefabricate the two units and to apply as dispenser parts z B with a label dispenser on the substrate 210.
  • This and the attachment of the perforation 211 can be particularly efficient in an endless process, in which the substrate 210 forms a continuous web, the For example, B is subdivided into individual sheets
  • the structure of the camouflage field 220 in addition to the aforementioned camouflage field layer 222, also comprises a transparent protective layer 221 and below this an intermediate layer 223, a carrier layer 224 and a pressure-sensitive adhesive layer 225.
  • the pressure-sensitive adhesive layer 225 is preferably adjusted again so that Abloding the entire Tarnfeldoidss from the substrate 210 is not possible nondestructively
  • the carrier layer 224 may be a paper or a film layer, the latter in particular with a thickness of about 60 microns It must allow the cohesion of the entire camouflage structure and its "handling" during dispensing
  • the camouflage field layer is anchored on the carrier layer 224 without the ink of the camouflage field layer 222 being able to penetrate to a greater extent into the intermediate layer 223 or even into the underlying carrier layer 24 used ink are concentrated in the camouflage field layer 22
  • camouflage field layer 222 serves the protective layer 210.
  • it is designed as a porous or lattice-like structure with a thickness of only 1-2 ⁇ m
  • Reactive label 230 according to FIG. 21 includes, in addition to those already mentioned
  • Layers 232-235 on the upper side of the carrier layer 232 still have a transparent sliding layer 231 and below the adhesive layers 234 and 235 another carrier layer 236 and a pressure-sensitive adhesive layer 237.
  • the latter establishes the connection of the reactive label to the substrate 210 and is again of the type that a Abred the entire structure of the reactive label 230 from the substrate 210 is non-destructive not possible.
  • the further carrier layer 236 is preferably like the carrier layer 232 a Foil layer z B made of polyester and also preferably only very thin z B with a thickness of 12 microns
  • the sliding layer 231 advantageously reduces the sliding resistance of the surface of the support layer 232 that is noticeable when rubbing with a finger to make confidential information visible, thus simplifying scratching.
  • the sliding resistance is preferably reduced by the sliding layer 231 to such an extent that the peel force required to move a 5 x 7 cm 2 piece of the overlayer coated with the overlay on a similar horizontal surface under load of 416 g at a constant rate of 138 to 8 cm / min, less than 1 N, and is preferably only about 0 5 N amounts
  • Protective varnish formulation are prepared, as offered by various manufacturers of paint and varnish.
  • the lubricity is adjusted by adding special lubricating waxes, for example for paints as wass ⁇ ge basic dispersion with LUBA-p ⁇ nt wax dispersion 138, available from LP Bader & Co GmbH, PF 1137, D-7861 Rottweil
  • the layer 233 is tightly embedded, especially if both support layers are film layers, which is indeed preferred.
  • a loss of Decolo ⁇ réellesstoff with time, for example by evaporation, is so good as excluded
  • the layer 233 preferably also contains a binder which contains wood glue and / or an odorizing agent and / or a liquid-absorbing agent and / or a dye

Landscapes

  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)

Abstract

L'invention concerne un support à imprimer comportant un champ de masquage, sur lequel un motif d'informations peut être imprimé de telle manière que ledit motif d'informations peut être reconnu devant l'arrière-plan du champ de masquage uniquement après exécution de certaines manipulations. L'invention vise à augmenter davantage le niveau de sécurité des informations confidentielles. A cet effet, on réalise, individuellement ou en combinaison, les mesures suivantes: le champ de masquage contient des points de couleur répartis de manière hétérogène, présentant une taille de 50 à 400 µm et une surface totale de 0.3 à 0.5 cm<SUP>2</SUP> par cm<SUP>2</SUP>; et/ou le champ de masquage est composé de plusieurs couches imprimées de façon superposée; et/ou le champ de masquage est imprimé au moyen d'une encre dont au moins 50 % sont concentrés dans une couche de champ de masquage; et/ou le champ de masquage peut être pelé au moins partiellement au moyen d'une bande adhésive et/ou avec d'autres couches, avec une force de pelage de 0.5 N/50 mm à 2 N/50 mm selon la méthode de test Finat N°1; et/ou le support à imprimer est pourvu d'un réactif thermochromatique se colorant de façon irréversible sous l'effet de la chaleur, à partir d'une température de 140 °C; et/ou le support à imprimer est pourvu d'un réactif réagissant avec un solvant, se colorant de façon irréversible dans une atmosphère de solvant.
EP05754456A 2004-07-07 2005-07-07 Support a imprimer comportant un champ de masquage destine a cacher un motif d'informations confidentiel Withdrawn EP1771307A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CH11422004 2004-07-07
CH13532004 2004-08-17
CH17832004 2004-10-28
CH2822005 2005-02-17
PCT/CH2005/000388 WO2006002571A1 (fr) 2004-07-07 2005-07-07 Support a imprimer comportant un champ de masquage destine a cacher un motif d'informations confidentiel

Publications (1)

Publication Number Publication Date
EP1771307A1 true EP1771307A1 (fr) 2007-04-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05754456A Withdrawn EP1771307A1 (fr) 2004-07-07 2005-07-07 Support a imprimer comportant un champ de masquage destine a cacher un motif d'informations confidentiel

Country Status (4)

Country Link
US (1) US20080012288A1 (fr)
EP (1) EP1771307A1 (fr)
AU (1) AU2005259752A1 (fr)
WO (1) WO2006002571A1 (fr)

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FR2902695B1 (fr) * 2006-06-26 2009-11-20 Packaging Partner Etiquette d'information inviolable
WO2009103021A1 (fr) * 2008-02-14 2009-08-20 Documotion Research, Inc. Matériaux de preuve d'effraction pour transporter des informations en sécurité
JP5834706B2 (ja) * 2011-09-28 2015-12-24 富士ゼロックス株式会社 画像検査装置及び画像形成装置

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US4092449A (en) * 1974-10-07 1978-05-30 Bernstein Donald J Alteration-sensitive imprinted article
GB2188283B (en) * 1986-03-21 1990-01-04 Advertising And Marketing Asso Improvements in or relating to prize-generating printed substrates
AUPP027397A0 (en) * 1997-11-07 1997-12-04 Documotion Research, Inc. Tamper-evident form for securely carrying confidential information
WO2004106085A1 (fr) * 2003-05-28 2004-12-09 Michel Lata S.A. Substrat adapté à être muni d'un dessin confidentiel

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Publication number Publication date
WO2006002571A1 (fr) 2006-01-12
US20080012288A1 (en) 2008-01-17
AU2005259752A1 (en) 2006-01-12

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