Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—Identification or security features, e.g. for preventing forgery
  • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
  • B42D25/378—Special inks
  • B42D25/387—Special inks absorbing or reflecting ultraviolet light
• • 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
  • B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—Identification or security features, e.g. for preventing forgery
  • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/40—Manufacture
  • B42D25/45—Associating two or more layers
  • B42D25/465—Associating two or more layers using chemicals or adhesives
  • B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives
• • B42D2035/34—

Definitions

• the invention relates to a document, in particular an official document, comprising at least two images each comprising at least one photoluminescent pigment, a security film comprising such images and a method for the secure protection of such a document.
• visible light designates any light whose spectral composition is at least partially located in the visible range, from 0.4 ⁇ to 0.8 ⁇ .
• non-visible light refers to any light whose spectral composition is located outside the visible spectrum, especially in the ultraviolet and / or infrared spectrum.
• short ultraviolet means any light whose spectral composition is in the wavelength range between 100 nm and 300 nm, and in particular between 200 nm and 300 nm.
• the term "long ultraviolet” any light whose spectral composition is located in the wavelength range between 300 nm and 400 nm.
• photoluminescent denotes any pigment (or any image) adapted to emit at least one visible radiation in response to illumination by at least one invisible light source emitting in the ultraviolet range and / or or infrared.
• Photoluminescent monochromatic or polychromatic printed labels invisible under light in visible light and visible under illumination by at least one non-visible light source are often used for authentication purposes of such official documents as passports or banknotes.
• WO 00/24587 describes for example a method for producing an invisible photoluminescent printed polychromatic image under visible light, and visible under illumination by at least one non-visible light source and a device for protecting a document comprising at least one such image.
• WO 00/24587 also describes the possibility of preparing an image comprising different pigments whose absorption spectra may be different, for example photoluminescent pigments whose absorption spectrum is comprised in long ultraviolet and / or photoluminescent pigments whose absorption spectrum is included in the short ultraviolet and / or photoluminescent pigments whose absorption spectrum is included in the infrared.
• Several different non-visible light sources are then required and must be used simultaneously to be able to view the single image prepared.
• EP 2,075,767 a document authentication device comprising at least two juxtaposed zones each printed with an ink containing fluorescent pigments, these two juxtaposed zones covering at least a third zone. printed also using an ink containing fluorescent pigments. Under a first ultraviolet radiation, the two juxtaposed zones form a filter for the radiation emitted to or retransmitted by the third zone which remains invisible, whereas under a second ultraviolet radiation, the third zone is visible.
• EP 2,075,767 does not disclose a document comprising both a short ultraviolet sensitive image and a long ultraviolet sensitive image, nor how to prepare such a document.
• the invention therefore aims to overcome the disadvantages of known protection devices and to propose a document, in particular an official document, and a security film having an increased level of security.
• the invention also aims at providing a method for the secure protection of a document, in particular an official, simple, reliable and inexpensive document making it possible to reproduce images, in particular images of polychromatic origin, and to improve the level security and authentication of a document, in particular an official document.
• the invention relates to a document, in particular an official document, comprising:
• the filtering layer superimposed on said second image and comprising at least one material, called filtering material, adapted to allow filtering the wavelengths emitted by said first non-visible light source, without preventing the visualization of the first image under illumination by the first light source.
• the inventors have surprisingly found that by placing such a filter layer opposite an image visible under illumination by a light source emitting in the long ultraviolet range, it is possible to obtain a first visible image under illumination by means of less a non-visible light source emitting in the field of short ultraviolet of good quality.
• the invention thus makes it possible to produce on the same document, two different images, one visible under short ultraviolet and the other visible under long ultraviolet light by disposing a filter layer as defined above with regard to the invisible image under illumination.
• visible and visible light under illumination by at least one non-visible light source emitting in the field of long ultraviolet light.
• a first illumination by at least a first non-visible light source emitting in the short ultraviolet range makes it possible to increase the number of authentication levels.
• selectively checking the presence of a first image without viewing other parasitic patterns; and a second illumination by at least a second non-visible light source emitting in the long ultraviolet range makes it possible selectively to check the presence of a second image without viewing other parasitic patterns, the two images being selectively visible with a very good quality.
• This thus makes it possible to verify the authenticity of a document by alternately observing a first image under illumination by at least a first non-visible light source emitting in the short ultraviolet range, and a second image under illumination by at least a second source. non-visible light emitting in the field of long ultraviolet light.
• said first image and said second image are two distinct images, that is to say that they are each formed of at least one printing layer different from each other.
• the first non-visible light source and the second non-visible light source emit in wavelength ranges that are at least partly different.
• photoluminescent pigments having different excitation wavelengths for the first image and the second image respectively, it is possible to prepare two quality images (one visible under excitation by short ultraviolet light and the other visible under excitation by long ultraviolet light) observable one independently of the other (and not only simultaneously).
• a document according to the invention is an official document or security selected from the group consisting of documents including identity data (such as passports, identity card, driving license or visas) , documents issued by an official administration and documents containing security data (such as bank cards or badges for controlled access).
• identity data such as passports, identity card, driving license or visas
• security data such as bank cards or badges for controlled access
• a document according to the invention in particular an official document according to the invention, generally bears inscriptions (or "inscriptions to read "), that is to say any sign or motif made on the document, which can be read by the man at least under certain conditions (in particular under normal light in visible light, and / or under specific lighting; or after activation of an electronic device (screen) or other ). It can be texts (manual writing or printed characters); codes (ASCII, universal codes with optoelectronic reading such as bar codes ...); images or photographs ...
• Any type of document can be used. It can be documents based on cellulosic materials (paper, cardboard, ...) or based on polymeric materials, rigid or flexible.
• said filtering layer is suitable for filtering wavelengths less than 300 nm, especially wavelengths between 100 nm and 300 nm, in particular wavelengths between 200 nm and 300 nm.
• said filtering layer is adapted not to block the wavelengths emitted by the second non-visible light source, in particular the wavelengths greater than 300 nm, in particular the wavelengths included. between 300 nm and 400 nm.
• the filtering layer may be formed of at least one material chosen from thermoplastic and thermosetting polymeric materials, in particular photocurable polymer materials.
• the filtering layer comprises at least one polymeric material chosen from the group consisting of polymeric materials suitable for filtering short ultraviolet radiation, and in particular in the group formed of thermoplastic polymeric materials (in particular polycarbonates, polyesters and polychlorides). vinyl (PVC)), thermosetting polymeric materials (especially polyurethanes) and photo-curable polymeric materials (in particular acrylic functionalized resins crosslinked or polymerized under ultraviolet radiation or under electron irradiation).
• the layer filter element comprises at least one polymeric material selected from the group consisting of polymeric materials having a transmittance of less than 30% at wavelengths less than 300 nm.
• the transmittance can be measured using a UV-visible spectrophotometer.
• the filtering layer comprises at least one polymeric material selected from the group consisting of polymeric materials comprising additives adapted to filter short ultraviolet radiation, and in particular in the group formed of acrylate polymers and co-polymers and or methacrylate in which filtering additives selected from short ultraviolet filtering additives, such as those of the 2- (2-hydroxyphenyl) benzotriazole (BTZ) or 2-hydroxyphenyl-s-triazine (HPT) family, are added.
• BTZ 2- (2-hydroxyphenyl) benzotriazole
• HPT 2-hydroxyphenyl-s-triazine
• various layers such as layers including other security functions or inscriptions may also be present between the first image and the second image.
• the first image and the second image may be identical or different in terms of size, pattern (s) shown or colors apart from the fact that one is visible under illumination by at least a first source of non-visible light emitting in the field of short ultraviolet and the other is visible under illumination by at least a second non-visible light source emitting in the field of long ultraviolet.
• said second image is different from said first image, which makes it possible to identify them more easily with respect to each other as a function of the non-visible light source used.
• said first image and said second image are colored. They can be monochromatic or polychromatic.
• said first image and said second image are polychromatic images.
• the second image is at least partially superimposed on the first image.
• each image is formed in additive synthesis.
• Each image may be transparent or semi-transparent to visible light.
• each image is transparent or semi-transparent.
• each image is semi-transparent. The proportion and nature of the photoluminescent pigments used make it possible in particular to modify the more or less transparent state of each image.
• the term "semi-transparent image” means any image which, when it covers a document or a product, makes it possible to distinguish - in particular from reading - by normal visualization through this image of the characters or motifs underlying them of the document. In particular, a semi-transparent image does not completely mask the characters and / or underlying patterns of the document.
• each image is formed of at least one printing layer, each printing layer being obtained by printing at least one printing composition comprising at least one photoluminescent pigment.
• each printing layer of the first image comprises, as photoluminescent pigments, only photoluminescent pigments under illumination by at least a first non-visible light source emitting in the short ultraviolet range.
• each printing layer of the second image comprises, as photoluminescent pigments, only photoluminescent pigments under illumination by at least one second non-visible light source emitting in the field. long ultraviolet light.
• the first image does not include photoluminescent pigments under illumination by at least one non-visible light source emitting in the field of long ultraviolet.
• each polychromatic image comprises a plurality of superimposed monochromatic printing layers.
• each printing composition comprises at least one photoluminescent pigment.
• Pigments Photoluminescents used are chosen from fluorescent pigments and phosphorescent pigments. Such pigments have an excitation spectrum extending at least in part in the ultraviolet range and an emission spectrum extending at least in part in the visible range.
• the photoluminescent pigments used are chosen from mineral pigments, in particular photoluminescent pigments comprising chemical elements belonging to the rare earth family, and organic pigments, in particular organic pigments resistant to radiation from each non-visible light source enabling to ensure the holding in time of each image.
• photoluminescent pigments adapted to be printed in screen printing are chosen.
• said document comprises at least one security film, said security film incorporating at least said second image and said filtering layer.
• said security film covers at least a surface portion of said document and extends in a format adapted to the format of said surface portion.
• the invention also extends to a security film, in particular a security film for obtaining such a document, said security film comprising:
• At least one second invisible image under illumination in visible light and visible under illumination by at least one second non-visible light source emitting in the long ultraviolet range said second image comprising at least one photoluminescent pigment under illumination by said second light source non visible, at least one layer, called the filtering layer, arranged opposite said second image and comprising at least one material, called filtering material, adapted to allow filtering the wavelengths emitted by said first non-visible light source, without preventing the viewing the first image under illumination by the first light source.
• said security film comprises at least one support film on which said first image and said second image are disposed, said filtering layer being disposed between said first image and said second image.
• the filtering layer and the support film form a same layer, the first image and the second image being each printed on a different face of this filtering layer acting as a support film.
• said filtering layer forms a support film having a first face on which said first image is disposed, and a second face, different from said first face, on which said second image is disposed.
• the first image and the second image are respectively printed on one side and the other side of the support film, this support film being in this case adapted to allow filtering the wavelengths emitted by said first non-visible light source. , without preventing the display of the first image under illumination by the first light source filtering short ultraviolet.
• the support film may be opaque or transparent.
• the support film may be opaque if it is intended to be removed for use of the document, in particular the official document to be protected, after a transfer of the security film on the document. If it is translucent or transparent (in visible light as well as short and long ultraviolet), the support film can be preserved once said security film affixed to the document to be protected.
• the support film can be formed of at least one material selected from cellulosic materials, polymeric materials and their composites.
• said support film is transparent, in particular transparent to short ultraviolet and long ultraviolet.
• the support film can form both a support on which are printed each of the images and the filter layer, and a layer protecting the outer surface of the security film, after transfer to the document.
• Various structural or functional layers may be arranged between the support film and the first image, each layer being chosen, if necessary, so as to be at least partly transparent to the ultraviolet short and long ultraviolet (that is to say in the case where they are intended to remain on the document to be protected and therefore not to be removed after a transfer of the security film).
• a transparent protective coating in particular transparent to short ultraviolet and long ultraviolet, can also be arranged on the support film.
• It may for example be a layer of varnish transparent to ultraviolet, especially short ultraviolet, such as varnishes described in the patent application FR 2,834,484.
• varnishes exhibit, after curing, covalent carbon-carbon bonds. exclusively saturated carbon.
• Such protective varnish is also adapted to be able, if necessary, to be easily separated from the support film on which it is deposited during a transfer on the document.
• the first image and the second image are arranged on the same document, being juxtaposed or at least partially superimposed on one another.
• Each image may cover a surface portion of different size and / or shape. They may cover the entire document or only a limited portion of the surface, in the manner of a logo in a particular area of the document.
• said second image is disposed above said first image on said film support. In this way, the first image and the second image can be located on the same surface portion of the document, overlapping at least in part and if, for example, the area portion allocated to this security point on the document is limited (the document may already contain other security features or areas with inscriptions that you do not want to add such images).
• the invention also extends to a method for the secure protection of at least one surface portion of a document, in particular an official document, in which:
• At least one first invisible image is applied to said surface portion under illumination in visible light and visible under illumination by at least one first non-visible light source emitting in the short ultraviolet range, said first image comprising at least one photoluminescent pigment; under illumination by said first non-visible light source, characterized in that:
• At least one second invisible image is applied to said surface portion under illumination in visible light and visible under illumination by at least one second non-visible light source emitting in the long ultraviolet range, said second image comprising at least one photoluminescent pigment under illumination by said second non-visible light source,
• a layer comprising at least one material, called filtering material, adapted to allow the wavelengths emitted by said first non-visible light source to be filtered, without preventing the visualization of the first image under illumination by the first light source.
• the first image is printed on a support film
• the filtering layer is deposited above the first image, the second image is printed on top of the filter layer,
• an adhesive layer is deposited above the second image.
• the images of a process according to the invention are prepared by a process such as that described in the international patent application WO 00/24587.
• a plurality of superimposed monochromatic printing layers are printed so that, in the order of reception of the illumination light, they are in the order blue, red , green filter wavelengths and emission peaks of photoluminescent pigments.
• At least three monochromatic negatives each corresponding to a first original image, are prepared which is filtered in a spectral bandwidth less than 15 nm centered at a wavelength, referred to as the filtering wavelength, chosen from the wavelengths of at least three fundamental colors, the different filter wavelengths of the monochromatic negatives being two by two distinct, each of these filtering wavelengths being equal to a wavelength of one peak emission of a photoluminescent pigment under illumination by at least a first non-visible light source,
• At least three monochromatic negatives each corresponding to a second original image, are prepared which are filtered with a spectral bandwidth less than 15 nm centered at a wavelength, referred to as the wavelength of filtering, chosen from the wavelengths of at least three fundamental colors, the different filter wavelengths of the monochromatic negatives being two by two distinct, each of these filtering wavelengths being equal to a wavelength of one peak emission of a photoluminescent pigment under illumination by at least a second non-light source visible, the second non-visible light source having a spectral composition different from the spectral composition of the first non-visible light source,
• a first polychromatic image is printed by successively printing at least three monochromatic images, using to print each monochromatic image, respectively one of the monochromatic negatives of said first original image and a printing composition comprising at least one photoluminescent pigment; having a peak emission wavelength, under illumination by at least one non-visible light source, which is equal to the filtering wavelength used to obtain said monochromatic negative,
• a second polychromatic image is printed by successively printing at least three monochromatic images, using to print each monochromatic image, respectively one of the monochromatic negatives of said second original image and a printing composition comprising at least one photoluminescent pigment; having a peak emission wavelength, under illumination by at least one non-visible light source, which is equal to the filtering wavelength used to obtain said monochromatic negative.
• Each printing composition can be applied by any technique for printing an image comprising photoluminescent pigments.
• each image is printed by a technique chosen from screen printing, flexography, offset and gravure printing.
• the invention extends to a method for the secure protection of at least one surface portion of a document, in particular an official document, in which a security film according to the invention is transferred to said document.
• the invention also relates to a document, in particular an official document, a security film, a security protection method and a method of manufacturing a security film characterized in combination by all or some of the features mentioned above or ci ci -after.
• a document in particular an official document, a security film, a security protection method and a method of manufacturing a security film characterized in combination by all or some of the features mentioned above or ci ci -after.
• FIG. 1 is a diagrammatic cross-sectional view of a security film according to the invention
• FIG. 2 is a diagrammatic cross-sectional view of an official document according to the invention.
• a transparent protective varnish 4 including transparent ultraviolet short and long ultraviolet.
• the support film 2 is generally chosen so as to have a size which exceeds that of the surface to be covered with the official document to be protected.
• the support film 2 may alternatively be opaque to the extent that it is intended to be removed after a transfer to an official document. If it is translucent or transparent (in visible light as well as in short and long ultraviolet light), it can be removed or retained when transferred to the official document to be protected (its size can then be adjusted to that of the surface to be covered with the official document to be protected).
• a first invisible polychromatic image is then printed under illumination in visible light and visible under illumination by at least a first non-visible light source emitting in the short ultraviolet range, using three printing compositions comprising pigments. photoluminescent under illumination by the first source 20 of non-visible light.
• the three printing compositions which form three layers 6a, 6b and 6c are successively printed therefor.
• a filtering layer 7 is printed directly above the image 5 to enable filtering of the wavelengths emitted by the first non-visible light source 20, without preventing the display of the first image under illumination by the first light source.
• the filtering layer may be formed of at least one material chosen from thermoplastic and thermosetting polymeric materials, in particular photocurable polymer materials.
• the filtering layer comprises at least one polymeric material selected from the group consisting of polymeric materials suitable for filtering short ultraviolet radiation, and in particular in the group formed of thermoplastic polymeric materials (in particular polycarbonates, polyesters and polyvinyl chlorides (PVC)), thermosetting polymeric materials (especially polyurethanes) and photocurable polymeric materials (in particular acryl functionalized resins crosslinked or polymerized under ultraviolet radiation or under electron irradiation).
• the filtering layer comprises in particular at least one such polymeric material having a transmittance (measured using a UV-visible spectrophotometer) of less than 30% at wavelengths less than 300 nm.
• the filtering layer comprises at least one polymeric material selected from the group consisting of polymeric materials comprising additives adapted to filter short ultraviolet radiation, and in particular in the group consisting of polymers and co-polymers of acrylate and / or methacrylate comprising filtering additives selected from short ultraviolet filtering additives, such as those of the 2- (2-hydroxyphenyl) -benzotriazole (BTZ) or 2-hydroxyphenyl-s-triazine (HPT) family .
• BTZ 2- (2-hydroxyphenyl) -benzotriazole
• HPT 2-hydroxyphenyl-s-triazine
• a second invisible polychromatic image 9 is printed under illumination in visible light and visible under illumination by at least a second source 22 of non-visible light emitting in the long ultraviolet range, using of three printing compositions comprising photoluminescent pigments under illumination by the second source 22 of invisible light.
• the three printing compositions which form three layers 8a, 8b and 8c are successively printed.
• An adhesive layer 10 can then be deposited on top of the second image 9, then a film 12 for protecting the adhesive.
• the security film 1 thus obtained may constitute a heat transfer, that is to say may be used to apply the security film 1 and transfer it by hot lamination on a surface portion of an official document 15, as shown in Figures 3 to 5, in particular to protect against forgery and / or to authenticate the official document and / or variable or common inscriptions previously printed on this surface portion and / or to ensure its integrity.
• a method of manufacturing a security film is therefore a method in which:
• At least one first invisible image is printed under illumination in visible light and visible under illumination by at least one first source 20 of non-visible light emitting in the field of short ultraviolet rays, using at least one composition of printing comprising at least one photoluminescent pigment under illumination by said first non-visible light source,
• At least one second invisible image 9 is printed under illumination in visible light and visible under illumination by at least one second source 22 of non-visible light emitting in the long ultraviolet range, using at least one composition of printing comprising at least one photoluminescent pigment under illumination by said second non-visible light source,
• a layer, called the filtering layer 7 is placed facing said second image, comprising at least one material, called filtering material, adapted to allow the wavelengths emitted by said first non-visible light source 20 to be filtered, without preventing the display of the first image under illumination by the first light source.
• the order of printing of the first image and the second image may vary depending on whether each of the three layers is successively deposited previous on a support film or directly on a document to protect, or that the filter layer is a support film.
• the second image 9 may be affixed directly to said card or to a film made of polycarbonate, PVC or PET, which the it is then affixed to said card.
• the first image 5 will preferably have been previously affixed to one side of said polycarbonate, PVC or PET film (said face being opposite to that on which the second image 9 is affixed.
• FIG. 2 shows an official document 15 on which the security film 1 has thus been transferred after having removed the protective film 12 from the adhesive layer 10.
• the support film 2 used as the transfer support film is also removed. If it is present, the protective varnish 4 then makes it possible to protect the first polychromatic image 5 from external aggressions, in particular chemical and climatic attacks, and also increases its resistance to mechanical stresses.
• the support film 2 may for example be a Fasprotek TM type film (F AS VER, Baillargues, France).
• the support film 2 may also comprise a single layer (not supported by a support and without a layer of protective varnish 4), for example a film of Fasfilm TM type (FASVER, Baillargues, France).
• the continuous layer is for example formed of polyethylene terephthalate, polycarbonate or polyvinyl chloride and may serve as a filter layer, the first polychromatic image being printed on a first face of the support and the second polychromatic image being printed on a second face of the support, different from the first face.
• the first image and the second image are thus printed respectively on one side and the other side of the polyethylene terephthalate, polycarbonate or polyvinyl chloride film and filtering short ultraviolet.
• the adhesive layer is not necessary to enable hot rolling transfer of the security film 1 to a surface portion of an official document 15.
• the photoluminescent pigments used are chosen from fluorescent pigments and phosphorescent pigments.
• the photoluminescent pigments used are chosen from mineral pigments, in particular photoluminescent pigments comprising chemical elements belonging to the rare earth family, and organic pigments resistant to radiation from each non-visible light source making it possible to hold in the time of each image.
• Figures 3 to 5 show an official document (eg an identity card) to which the security film as previously prepared has been transferred.
• an official document eg an identity card
• Figure 3 shows the official document as seen under visible light (daylight for example).
• the images 5 and 9 comprising photoluminescent pigments are therefore not visible.
• the official document 15 has inscriptions 17, including identity data.
• the inscriptions 17 appearing on the official document 15 are preferably black and in particular of color (or shade) different from the colors of the patterns of the semitransparent polychromatic images covering them, so that the inscriptions are easily distinguishable from the naked eye (under illumination by a light source not visible in short and / or long ultraviolet light).
• the official document is observed under short ultraviolet light due to the non-visible light source.
• the image 5 (which represents for example a pattern such as a butterfly).
• the official document is observed under long ultraviolet light thanks to the source 22 of invisible light.
• the image 9 (which represents for example a pattern such as a flower).
• a protective polyurethane varnish implemented from an aqueous solution comprising a base of transfer varnish marketed by TIFLEX (France) under the reference 3X9426® and a hardener referenced 3X9427®.
• the proportion of hardener added is 45 parts by volume per 100 parts by volume of the base.
• This printing is performed by flat screen printing 51 mesh son / cm so that the layer of protective varnish deposited has a thickness between 10 ⁇ and 20 ⁇ .
• a first image is printed using three different printing compositions, each being formulated from an ink base adapted to not filter short ultraviolet such as an ink base.
• the first printing composition comprises blue-colored fluorescent pigments as sold by MITSUBISHI CHEMICAL CORPORATION (Japan) under the reference KX-626A®.
• the second printing composition comprises red-colored fluorescent pigments as marketed by HONEYWELL under the reference Lumilux Red CD106®.
• the third printing composition comprises fluorescent pigments of green color as marketed by HONEYWELL under the reference Lumilux Green CD145®. It is for this first image of fluorescent pigments visible under short ultraviolet.
• the concentration of blue-colored fluorescent pigments in the first printing composition is 50% by weight relative to the total weight of the first printing composition.
• concentration of red-colored fluorescent pigments in the second printing composition is 16.5% by weight relative to the total weight of the second printing composition.
• the concentration of green fluorescent pigments in the third printing composition is 15% by weight relative to the total weight of the third printing composition.
• a polyurethane-based varnish comprising a lacquer base such as marketed by the company TIFLEX (France) under the reference 3Y0530, S3HN1® varnish (product screen printing) and a catalyst as sold by TIFLEX (France) under the reference 3X9096®.
• the proportion of added catalyst is 53 parts by volume per 100 parts by volume of the base of varnish.
• the printing is performed by flat screen printing mesh 77 son / cm so that the layer of protective varnish deposited has a thickness between 8 ⁇ and 12 ⁇ . This gives a layer of varnish filtering short ultraviolet.
• the first printing composition is a UVIPRIM® ink marketed by TIFLEX (France) under the reference 3Y1150 blue®.
• the second printing composition is a UVIPRIM® ink marketed by TIFLEX (France) under the reference 3Y0742 rouge®.
• the third printing composition is a UVIPRIM® ink marketed by TIFLEX (France) under the reference 3Y0877 vert®. It is for this second image of fluorescent pigments visible under long ultraviolet.
• Each layer is allowed to dry between each print.
• a heat-sealable adhesive sold by the company Tiflex under the reference 3Y1836NF® (screen-printed product) is then deposited. Under illumination by a light source emitting in the short ultraviolet range at a wavelength of the order of 250 nm, only the first image is observed. Under illumination by a light source emitting in the long ultraviolet range at a wavelength of the order of 365 nm, only the second image is observed.
• the invention can be the subject of many variants.

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• Health & Medical Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Toxicology (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Printing Methods (AREA)
• Inspection Of Paper Currency And Valuable Securities (AREA)
• Credit Cards Or The Like (AREA)

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• 2014
  • 2014-03-24 FR FR1452465A patent/FR3018730B1/fr active Active
• 2015
  • 2015-03-23 CA CA2941531A patent/CA2941531A1/fr not_active Abandoned
  • 2015-03-23 US US15/128,538 patent/US10293629B2/en active Active
  • 2015-03-23 WO PCT/EP2015/056141 patent/WO2015144646A1/fr active Application Filing
  • 2015-03-23 EP EP15714439.5A patent/EP3122569A1/de not_active Withdrawn

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