EP1284321A1 - Anti-copy marking composition - Google Patents
Anti-copy marking composition Download PDFInfo
- Publication number
- EP1284321A1 EP1284321A1 EP02291985A EP02291985A EP1284321A1 EP 1284321 A1 EP1284321 A1 EP 1284321A1 EP 02291985 A EP02291985 A EP 02291985A EP 02291985 A EP02291985 A EP 02291985A EP 1284321 A1 EP1284321 A1 EP 1284321A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- photoluminescent
- composition according
- luminescence
- photocopier
- 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- Withdrawn
Links
Classifications
-
- 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
- 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
- B41M3/146—Security printing using a non human-readable pattern which becomes visible on reproduction, e.g. a void mark
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
- D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
- D21H21/48—Elements suited for physical verification, e.g. by irradiation
Definitions
- the present invention relates to a composition of anti-copy marking.
- An object of the invention is to propose a composition anti-copy marking causing degradation color when making a photocopy and whose reproduction is not easily achievable.
- a copy marking composition comprising an organic matrix into which are incorporated photoluminescent components of which at least a has a material color visible in the light of day, this composition comprising at least a first photoluminescent component having luminescence in a first range of wavelengths perceptible by sensors of a copier when it is energized by a photocopier lamp, and at least one second component photoluminescent having luminescence in a second wavelength range perceptible by the sensors from the photocopier when excited by a lamp the second range of wavelengths being at least partially different from the first wavelength range and the luminescence of at least one of the components having sufficient intensity to be perceived by the photocopier's sensors according to a perception different from that obtained when this same component is exposed to daylight.
- the mixture of different photoluminescent components makes it difficult to reproduce the composition and because of the difference in intensity and spectrum of illumination of a photocopier lamp by compared to daylight, the relative intensity of the light color (luminescence) versus color matter (refracted radiation) is different from that obtained during exposure to daylight from so that the color reproduced during a photocopy is significantly different from that appearing on the document original during a light analysis.
- the first photoluminescent component and the second component photoluminescent form a light cascade. Range second component luminescence wavelengths is thus modified so that the color drift is increased when photocopying.
- the composition comprises a phosphorescent luminescent component.
- the luminescence that continues beyond excitement by the photocopier lamp then causes on the photocopier sensors an additional disturbance increasing the difficulty of color management by the photocopier.
- the copy marking composition according to the invention comprises in an organic matrix formed for example with an acrylic resin binder and a mixture photoluminescent representing approximately 20% by weight of the composition, the photoluminescent mixture comprising a part of zinc sulfide doped with silver, a part of copper-doped zinc sulfide and a portion of calcium doped with europium and samarium.
- zinc sulfide doped with silver is a fluorescent component, i.e. its luminescence immediately ceases with cessation of excitement and forms a luminous cascade with the sulfide of calcium doped with europium and samarium, i.e. that part of the luminescence resulting from the sulfide of zinc doped with silver (around 10%) corresponds to the spectrum excitation of calcium sulfide which is also a fluorescent component.
- Copper-doped zinc sulfide is a component phosphorescent whose luminescence forms very partially a luminous cascade with calcium sulfide doped with europium and samarium.
- the luminescence of silver-doped zinc sulfide is blue in color, the luminescence of copper doped zinc is pale green in color and the luminescence calcium sulfide doped with europium and samarium is red.
- the composition is subject to daylight, it appears pink and when a sign printed using this composition is reproduced by a photocopier, this sign appears yellowish on the photocopy.
- photoluminescent components can be used not forming a light cascade or whose only some of them form a luminous cascade. It is also possible to produce a composition containing exclusively fluorescent components, for example limiting the composition described above to a mixture silver doped zinc sulfide and calcium doped with europium and samarium.
- the doped calcium sulfide to the europium and to the samarium emits a luminescence to the times in a downward conversion, forming a luminous cascade with zinc sulfide doped with silver, and according to a backward conversion (anti-Stokes conversion) from the infrared which is emitted so important by the lamp of a photocopier.
- This conversion ascending can be accentuated by using off the excited neodymium doped yttrium vanadate by ultraviolet and emits in the infrared and thus forms a second luminous cascade with the sulfide calcium.
- oxysulphides of rare earth which have a downward or upward conversion depending on the dopant used.
Abstract
Description
La présente invention concerne une composition de marquage anticopie.The present invention relates to a composition of anti-copy marking.
On sait qu'avec les progrès constants de la photocopie en couleur, il est maintenant possible de réaliser des photocopies dont les couleurs sont extrêmement fidèles aux couleurs du document original. Ceci permet donc à des fraudeurs de reproduire en grande série des documents dont le tirage doit normalement rester contrôler, en particulier des billets de banque.We know that with the constant progress of photocopying in color, it is now possible to realize photocopies whose colors are extremely true to the colors of the original document. this allows therefore to fraudsters to reproduce in large series documents whose circulation should normally remain checked, especially bank notes.
De nombreuses recherches ont été effectuées pour mettre au point des compositions non détectables à la lumière du jour, c'est-à-dire ayant une couleur se confondant avec la couleur du support lorsque le document est analysé à la lumière du jour. Les signes correspondants ne sont bien entendu pas reproduits lors de la réalisation d'une photocopie mais l'absence de ce signe ne peut être détectée qu'en soumettant le document à un rayonnement particulier, par exemple un rayonnement ultraviolet. Dans le cas de billets de banque, il existe donc un risque qu'une copie de bonne qualité soit confondue avec un billet de banque original lorsque la personne recevant le billet de banque ne dispose pas d'un détecteur de faux billets équipé d'une lampe à ultraviolets.Much research has been done to develop compositions not detectable by light of the day, that is to say having a color merging with the media color when the document is analyzed in daylight. The corresponding signs are of course not reproduced during production a photocopy but the absence of this sign cannot be detected only by subjecting the document to radiation particular, for example ultraviolet radiation. In the case of banknotes, there is therefore a risk that a good quality copy is confused with a original bank note when the person receiving the bank note does not have a counterfeit detector banknotes equipped with an ultraviolet lamp.
Par ailleurs, il est connu que des matières fluorescentes ayant une luminescence dans une gamme de longueurs d'ondes visible sont mal reproduites par un photocopieur. Afin de faire échec à la photocopie en couleur de documents originaux on a déjà utilisé diverses techniques, notamment l'application sur le document d'un signe réalisé avec une composition présentant des effets spéciaux, par exemple une composition générant par absorption de la lumière du jour un rayonnement réfracté ayant une couleur (couleur matière) visible, et générant par photoluminescence à la lumière du jour un rayonnement émis ayant une couleur (couleur lumière) également visible à la lumière du jour. Ces produits sont traditionnellement dénommés "fluorescent lumière du jour".Furthermore, it is known that fluorescent materials having luminescence in a range of lengths visible waves are poorly reproduced by a photocopier. In order to defeat color photocopying of original documents we have already used various techniques, in particular the application to the document of a sign made with a composition with special effects, for example a composition generating by absorption of daylight refracted radiation having a visible color (material color), generating photoluminescence in daylight radiation emitted having a color (light color) also visible in the light of day. These products are traditionally called "daylight fluorescent".
Toutefois, de telles matières fluorescentes pures dont la luminescence est suffisante pour être directement perçue lors d'un examen à la lumière du jour sont très peu nombreuses et sont d'un usage courant en bureautique pour effectuer du surlignage de textes de sorte que si une matière de ce type est utilisée pour réaliser un signe il est aisé pour un fraudeur de réaliser une contrefaçon qui a toutes les apparences d'un document authentique.However, such pure fluorescent materials whose luminescence is sufficient to be directly perceived during a light exam are very few and are in common use in office automation to highlight texts so that if a material of this type is used to make a sign it is easy for a fraudster to make a counterfeit which has all the appearances of an authentic document.
On a également envisagé de mélanger un produit photoluminescent avec un produit non photoluminescent présentant une couleur différente dans l'espoir que la couleur résultante obtenue lors de la photocopie serait différente de la couleur obtenue lors de la copie du composant non luminescent seul. Il est toutefois apparu qu'une telle composition ne provoquait pratiquement aucune dérive de couleur sur le document photocopié, la couleur principale étant celle du composant non photoluminescent.We also considered mixing a product photoluminescent with a non photoluminescent product exhibiting a different color in the hope that the resulting color obtained during photocopying would different from the color obtained when copying the component non luminescent alone. However, it appeared that such a composition caused practically no color drift on the photocopied document, the main color being that of the non-photoluminescent component.
Il est en outre connu du document EP-A-265 323 de réaliser une composition permettant de réaliser un marquage de sécurité sur un document, cette composition comportant au moins un composant fluorescent et au moins un composant phosphorescent réalisant entre eux une cascade lumineuse de façon à présenter différentes couleurs selon que le document est analysé à la lumière du jour, sous un rayonnement ultraviolet, ou dans l'obscurité après soumission à un rayonnement ultraviolet. Il n'est toutefois envisagé dans ce document aucune recherche d'un effet anticopie. Le composant phosphorescent formant l'un des éléments de la cascade lumineuse est d'ailleurs du PPO qui a une luminescence très pâle et ne serait donc pas perçue par les capteurs d'un photocopieur. It is further known from document EP-A-265 323 of make a composition for marking security on a document, this composition comprising at least one fluorescent component and at least one phosphorescent component creating a cascade between them bright so as to present different colors depending that the document is analyzed in the light of day, under a ultraviolet radiation, or in the dark after submission to ultraviolet radiation. However, it is not envisaged in this document no search for an anti-copying effect. The phosphorescent component forming one of elements of the light cascade is also from the PPO which has a very pale luminescence and therefore would not perceived by the sensors of a photocopier.
Un but de l'invention est de proposer une composition de marquage anticopie provoquant une dégradation de la couleur lors de la réalisation d'une photocopie et dont le reproduction ne soit pas aisément réalisable.An object of the invention is to propose a composition anti-copy marking causing degradation color when making a photocopy and whose reproduction is not easily achievable.
En vue de la réalisation de ce but on propose selon l'invention une composition de marquage anticopie comprenant une matrice organique dans laquelle sont incorporés des composants photoluminescents dont au moins un présente une couleur matière visible à la lumière du jour, cette composition comprenant au moins un premier composant photoluminescent ayant une luminescence dans une première gamme de longueurs d'ondes perceptible par des capteurs d'un photocopieur lorsqu'il est excité par une lampe de photocopieur, et au moins un second composant photoluminescent ayant une luminescence dans une seconde gamme de longueurs d'ondes perceptible par les capteurs du photocopieur lorsqu'il est excité par une lampe de photocopieur, la seconde gamme de longueurs d'ondes étant au moins partiellement différente de la première gamme de longueurs d'ondes et la luminescence d'au moins l'un des composants ayant une intensité suffisante pour être perçue par les capteurs du photocopieur selon une perception différente de celle obtenue lorsque ce même composant est exposé à la lumière du jour.In order to achieve this goal we propose according to the invention a copy marking composition comprising an organic matrix into which are incorporated photoluminescent components of which at least a has a material color visible in the light of day, this composition comprising at least a first photoluminescent component having luminescence in a first range of wavelengths perceptible by sensors of a copier when it is energized by a photocopier lamp, and at least one second component photoluminescent having luminescence in a second wavelength range perceptible by the sensors from the photocopier when excited by a lamp the second range of wavelengths being at least partially different from the first wavelength range and the luminescence of at least one of the components having sufficient intensity to be perceived by the photocopier's sensors according to a perception different from that obtained when this same component is exposed to daylight.
Ainsi, le mélange de différents composants photoluminescents rend difficile la reproduction de la composition et en raison de la différence d'intensité et de spectre d'illumination d'une lampe de photocopieur par rapport à la lumière du jour, l'intensité relative de la couleur lumière (luminescence) par rapport à la couleur matière (rayonnement réfracté) est différente de celle obtenue lors d'une exposition à la lumière du jour de sorte que la couleur reproduite lors d'une photocopie est sensiblement différente de celle apparaissant sur le document original lors d'une analyse à la lumière du jour. So the mixture of different photoluminescent components makes it difficult to reproduce the composition and because of the difference in intensity and spectrum of illumination of a photocopier lamp by compared to daylight, the relative intensity of the light color (luminescence) versus color matter (refracted radiation) is different from that obtained during exposure to daylight from so that the color reproduced during a photocopy is significantly different from that appearing on the document original during a light analysis.
Selon une version avantageuse de l'invention, le premier composant photoluminescent et le second composant photoluminescent forment une cascade lumineuse. La gamme de longueurs d'ondes de luminescence du second composant se trouve ainsi modifiée de sorte que la dérive de couleur est augmentée lors de la photocopie.According to an advantageous version of the invention, the first photoluminescent component and the second component photoluminescent form a light cascade. Range second component luminescence wavelengths is thus modified so that the color drift is increased when photocopying.
Selon un autre aspect avantageux de l'invention, la composition comporte un composant luminescent phosphorescent. La luminescence qui se poursuit au-delà de l'excitation par la lampe du photocopieur provoque alors sur les capteurs du photocopieur une perturbation supplémentaire augmentant la difficulté de gestion des couleurs par le photocopieur.According to another advantageous aspect of the invention, the composition comprises a phosphorescent luminescent component. The luminescence that continues beyond excitement by the photocopier lamp then causes on the photocopier sensors an additional disturbance increasing the difficulty of color management by the photocopier.
Selon un exemple de réalisation particulier non limitatif, la composition de marquage anticopie selon l'invention comporte dans une matrice organique formée par exemple par un liant de résine acrylique et un mélange photoluminescent représentant environ 20 % en poids de la composition, le mélange photoluminescent comportant une part de sulfure de zinc dopé à l'argent, une part de sulfure de zinc dopé au cuivre et une part de sulfure de calcium dopé à l'europium et au samarium.According to a particular embodiment example not limiting, the copy marking composition according to the invention comprises in an organic matrix formed for example with an acrylic resin binder and a mixture photoluminescent representing approximately 20% by weight of the composition, the photoluminescent mixture comprising a part of zinc sulfide doped with silver, a part of copper-doped zinc sulfide and a portion of calcium doped with europium and samarium.
Dans ce mélange, le sulfure de zinc dopé à l'argent est un composant fluorescent, c'est-à-dire que sa luminescence cesse immédiatement avec l'arrêt de l'excitation et forme une cascade lumineuse avec le sulfure de calcium dopé à l'europium et au samarium, c'est-à-dire qu'une partie de la luminescence résultant du sulfure de zinc dopé à l'argent (environ 10 %) correspond au spectre d'excitation du sulfure de calcium qui est également un composant fluorescent.In this mixture, zinc sulfide doped with silver is a fluorescent component, i.e. its luminescence immediately ceases with cessation of excitement and forms a luminous cascade with the sulfide of calcium doped with europium and samarium, i.e. that part of the luminescence resulting from the sulfide of zinc doped with silver (around 10%) corresponds to the spectrum excitation of calcium sulfide which is also a fluorescent component.
Le sulfure de zinc dopé au cuivre est un composant phosphorescent dont la luminescence forme très partiellement une cascade lumineuse avec le sulfure de calcium dopé à l'europium et au samarium. Copper-doped zinc sulfide is a component phosphorescent whose luminescence forms very partially a luminous cascade with calcium sulfide doped with europium and samarium.
La luminescence du sulfure de zinc dopé à l'argent est de couleur bleue, la luminescence du sulfure de zinc dopé au cuivre est de couleur vert pâle et la luminescence du sulfure de calcium dopé à l'europium et au samarium est rouge. Lorsque la composition est soumise à la lumière du jour, elle apparaít rose et lorsqu'un signe imprimé au moyen de cette composition est reproduit par un photocopieur, ce signe apparaít jaunâtre sur la photocopie.The luminescence of silver-doped zinc sulfide is blue in color, the luminescence of copper doped zinc is pale green in color and the luminescence calcium sulfide doped with europium and samarium is red. When the composition is subject to daylight, it appears pink and when a sign printed using this composition is reproduced by a photocopier, this sign appears yellowish on the photocopy.
Bien entendu, l'invention n'est pas limitée à l'exemple de composition décrit et on peut apporter des modifications à sa réalisation sans sortir du cadre de l'invention tel que défini par les revendications.Of course, the invention is not limited to the composition example described and we can add modifications to its realization without departing from the framework of the invention as defined by the claims.
En particulier, bien que dans l'exemple décrit un composant phosphorescent et un premier composant fluorescent forment une cascade lumineuse avec un second composant fluorescent, on peut utiliser des composants photoluminescents ne formant pas de cascade lumineuse ou dont seulement certains d'entre eux forment une cascade lumineuse. On peut également réaliser une composition contenant exclusivement des composants fluorescents, par exemple en limitant la composition décrite ci-dessus à un mélange de sulfure de zinc dopé à l'argent et de sulfure de calcium dopé à l'europium et au samarium.In particular, although in the example describes a phosphorescent component and a first fluorescent component form a light cascade with a second component fluorescent, photoluminescent components can be used not forming a light cascade or whose only some of them form a luminous cascade. It is also possible to produce a composition containing exclusively fluorescent components, for example limiting the composition described above to a mixture silver doped zinc sulfide and calcium doped with europium and samarium.
Dans l'exemple décrit le sulfure de calcium dopé à l'europium et au samarium émet une luminescence à la fois selon une conversion descendante, en formant une cascade lumineuse avec le sulfure de zinc dopé à l'argent, et selon une conversion remontante (conversion anti-Stokes) à partir des infrarouges qui sont émis de façon importante par la lampe d'un photocopieur. Cette conversion remontante peut être accentuée en utilisant en outre du vanadate d'yttrium dopé au néodyme qui est excité par les ultraviolets et émet dans l'infrarouge et forme ainsi une seconde cascade lumineuse avec le sulfure de calcium. On peut également utiliser des oxysulfures de terre rare qui ont une conversion descendante ou montante en fonction du dopant utilisé.In the example described the doped calcium sulfide to the europium and to the samarium emits a luminescence to the times in a downward conversion, forming a luminous cascade with zinc sulfide doped with silver, and according to a backward conversion (anti-Stokes conversion) from the infrared which is emitted so important by the lamp of a photocopier. This conversion ascending can be accentuated by using off the excited neodymium doped yttrium vanadate by ultraviolet and emits in the infrared and thus forms a second luminous cascade with the sulfide calcium. It is also possible to use oxysulphides of rare earth which have a downward or upward conversion depending on the dopant used.
Claims (7)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0110805A FR2828697B1 (en) | 2001-08-14 | 2001-08-14 | ANTICOPY MARKING COMPOSITION |
| FR0110805 | 2001-08-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1284321A1 true EP1284321A1 (en) | 2003-02-19 |
Family
ID=8866523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02291985A Withdrawn EP1284321A1 (en) | 2001-08-14 | 2002-08-07 | Anti-copy marking composition |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1284321A1 (en) |
| FR (1) | FR2828697B1 (en) |
| MA (1) | MA25710A1 (en) |
| MD (1) | MD2402C2 (en) |
| OA (1) | OA12477A (en) |
| TN (1) | TNSN02073A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2855640A1 (en) * | 2003-05-26 | 2004-12-03 | Arjo Wiggins | SECURITY DOCUMENT AND METHOD FOR MANUFACTURING THE SAME |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4500116A (en) * | 1978-01-18 | 1985-02-19 | The Post Office | Identification matter |
| EP0265323A1 (en) * | 1986-10-10 | 1988-04-27 | Banque De France | Fiduciary security object permitting a visual or optical authentification |
| US4897300A (en) * | 1987-08-19 | 1990-01-30 | Gao Gesellschaft Fuer Automation Und Organisation Mbh | Security paper |
| GB2300596A (en) * | 1995-05-10 | 1996-11-13 | Portals Ltd | Fluorescent security feature for cheques and banknotes |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE461359B (en) * | 1987-06-30 | 1990-02-05 | Global Security Ab | SET AND DEVICE FOR INSERT LABELING OF BOOKLETS OR VALUES |
| DE3915638B4 (en) * | 1989-05-12 | 2006-06-08 | Giesecke & Devrient Gmbh | Security document with embedded security element with visually and machine-checkable tags and security element for a security document |
| DE4114732A1 (en) * | 1991-05-06 | 1992-11-12 | Helmut Dr Bayer | Banknote security mark - uses 2 or more substances which are fluorescent under ultraviolet of different wavelengths |
| US5639126A (en) * | 1995-06-06 | 1997-06-17 | Crane & Co., Inc. | Machine readable and visually verifiable security threads and security papers employing same |
| DE19735293C2 (en) * | 1997-08-14 | 2003-06-12 | Bundesdruckerei Gmbh | Value and security product with luminescent element |
| RU2150749C1 (en) * | 1999-02-09 | 2000-06-10 | Петрик Виктор Иванович | Tool for protection of securities and documents against faking |
| FR2813134B1 (en) * | 2000-08-21 | 2004-01-16 | Banque De France | METHOD FOR AUTHENTICATING SENSITIVE DOCUMENTS |
| DE10056462A1 (en) * | 2000-11-14 | 2002-05-23 | Giesecke & Devrient Gmbh | Production of a luminescent material used for marking valuable documents comprises charging an ion exchanger with rare earth metal cations and thermally treating the charged ion exchanger |
| DE20116951U1 (en) * | 2001-10-09 | 2001-12-13 | Khulusi Gelan | Dispensing element for checking banknotes |
-
2001
- 2001-08-14 FR FR0110805A patent/FR2828697B1/en not_active Expired - Fee Related
-
2002
- 2002-08-07 EP EP02291985A patent/EP1284321A1/en not_active Withdrawn
- 2002-08-08 MD MDA20020204A patent/MD2402C2/en not_active IP Right Cessation
- 2002-08-09 MA MA26767A patent/MA25710A1/en unknown
- 2002-08-12 TN TNSN02073 patent/TNSN02073A1/en unknown
- 2002-08-14 OA OA1200200245A patent/OA12477A/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4500116A (en) * | 1978-01-18 | 1985-02-19 | The Post Office | Identification matter |
| EP0265323A1 (en) * | 1986-10-10 | 1988-04-27 | Banque De France | Fiduciary security object permitting a visual or optical authentification |
| US4897300A (en) * | 1987-08-19 | 1990-01-30 | Gao Gesellschaft Fuer Automation Und Organisation Mbh | Security paper |
| GB2300596A (en) * | 1995-05-10 | 1996-11-13 | Portals Ltd | Fluorescent security feature for cheques and banknotes |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2855640A1 (en) * | 2003-05-26 | 2004-12-03 | Arjo Wiggins | SECURITY DOCUMENT AND METHOD FOR MANUFACTURING THE SAME |
| WO2004106078A1 (en) * | 2003-05-26 | 2004-12-09 | Arjowiggins | Security document and method for the production thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| OA12477A (en) | 2006-05-24 |
| MD2402C2 (en) | 2004-10-31 |
| TNSN02073A1 (en) | 2004-03-05 |
| FR2828697A1 (en) | 2003-02-21 |
| MA25710A1 (en) | 2003-04-01 |
| MD2402B1 (en) | 2004-03-31 |
| FR2828697B1 (en) | 2003-11-21 |
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