EP0440554B1 - Combination of a document authenticable and of an authentication composition and process of authentication using such a combination. - Google Patents

Combination of a document authenticable and of an authentication composition and process of authentication using such a combination. Download PDF

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Publication number
EP0440554B1
EP0440554B1 EP19910400224 EP91400224A EP0440554B1 EP 0440554 B1 EP0440554 B1 EP 0440554B1 EP 19910400224 EP19910400224 EP 19910400224 EP 91400224 A EP91400224 A EP 91400224A EP 0440554 B1 EP0440554 B1 EP 0440554B1
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EP
European Patent Office
Prior art keywords
document
authentication
composition
fact
reagent
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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.)
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Application number
EP19910400224
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German (de)
French (fr)
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EP0440554A1 (en
Inventor
Christophe Halope
René Veyet
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ArjoWiggins SAS
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ArjoWiggins SAS
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Priority claimed from FR9001125A external-priority patent/FR2657630B1/en
Application filed by ArjoWiggins SAS filed Critical ArjoWiggins SAS
Publication of EP0440554A1 publication Critical patent/EP0440554A1/en
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Publication of EP0440554B1 publication Critical patent/EP0440554B1/en
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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
    • B41M3/142—Security printing using chemical colour-formers or chemical reactions, e.g. leuco-dye/acid, photochromes
    • 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
    • D21H21/46—Elements suited for chemical verification or impeding chemical tampering, e.g. by use of eradicators

Definitions

  • the invention relates to a combination of an authenticated document and an authentication composition, as well as the authentication method.
  • Application GB-1 507 454, filed by WIGGINS-TEAPE, describes a method for authenticating a document when it is canceled.
  • This request describes the following authentication method:
  • the document is printed on a security paper consisting of a base paper, coated with a composition containing a leuco-dye, an inert pigment and a binder, and the authentication is carried out by obliteration.
  • paper using an authentication composition comprising mixing a dark pigmented ink and a solution of a compound which reacts with the leuco dye to form a color.
  • the electron donor leuco dye is encapsulated with a solvent in microcapsules which rupture under the pressure exerted during the obliteration with an ink pad and reacts with the acid compound, electron acceptor, contained in the authentication composition. . It is not the inscription which is made during the cancellation which has a particular color allowing to authenticate the document, but it is a halo which surrounds this composition. Indeed, the leucocolourant which is in liquid form is partially absorbed by the ink pad during the obliteration, and therefore it contaminates the ink which, if it does not contain dark pigments, takes on the authentication color and is no longer valid for authenticating the document.
  • the applicant for this patent was forced to use a dark pigmented ink to mask the authentication coloration prematurely developed in the ink pad and had to add an inert filler in the layer comprising the leuco-dye microcapsules to diffuse the acid reagent. around the cancellation which then develops a halo of the authentication color.
  • the dark ink also highlights the inscription inside the halo.
  • EP-A-90130 describes a method of authenticating a paper security which is characterized by the fact that one of the two substances of a colored reaction system is deposited on the paper sheet. consisting of an electron donor color trainer and an electron acceptor color developer, one of the substances therefore being on the surface of the title and the other being in a dispenser which makes it possible to write or to print on this surface.
  • Application FR-A-2315132 describes a method of authenticating valuable securities coated with a hot-applied carbon ink which is characterized by the fact that this coating contains a reagent which reacts with another compound brought to the surface of the title during authentication and producing a characteristic coloring.
  • this coating contains a reagent which reacts with another compound brought to the surface of the title during authentication and producing a characteristic coloring.
  • a color former in the coating and use as co-reactant a solution of an appropriate color developer
  • This process therefore also has the disadvantage that the reagent is on the surface of the voucher to be authenticated.
  • the process is quite complicated, since it requires the use of a blotter or a cotton ball to aspirate the reaction liquid. .
  • the invention therefore aims to provide a method of authenticating a document when it is obliterated, this method consisting in using the principle of a colored reaction between a reagent contained in the document and a co-reactant contained in the ink. authentication, while overcoming or avoiding the drawbacks of the prior art.
  • An object of the invention is therefore to provide a method of authenticating a document during its cancellation, which is at the same time simple, rapid, economical.
  • Another object of the invention is to provide an authentication method which gives a clear and legible inscription on the document, the inscription appearing in color during the cancellation.
  • a third object of the invention is to provide an authenticated document and its authentication composition without using the technique of microcapsules.
  • Another object of the invention is to provide such a system according to which the document can be authenticated both on the front and on the back. This makes it easy to distinguish it from the leaves commercially available, which have an active color only on one side and react only on one side.
  • Another object of the invention is to provide such a system with a document which can be easily watermarked, the watermark being another important security element.
  • the coated sheets generally do not have a watermark because it would be hidden by the layer or damaged during the deposition of the layer.
  • the objects of the invention are achieved by using as a reagent in the document a compound which is in solid form in the document, thus this compound cannot be absorbed by an ink pad or other marking device and contaminate the composition of authentication contained in this device.
  • the invention therefore provides a combination of a document to be authenticated during its obliteration, comprising a reagent participating in the authentication reaction chosen from the acceptors of color developer electron (s) and an authentication composition containing a co-reactant reacting with the reagent of the document to produce a distinctive colored inscription of cancellation on the document to be authenticated, the authentication composition being a fatty ink containing a co-reactant chosen from the donor of color-forming electron (s), characterized by the fact that the document contains in mass and in solid form said reagent. which is chosen from the group formed by acid mineral fillers, phenolic resins, zinc compounds and their mixtures.
  • a bentonite (called montmorillonite), and even more preferably a bentonite which has a specific surface (measured by the BET method, according to standard DIN 66 131, the gas being nitrogen ) greater than 200 m 2 / g.
  • the coloformers associated with these color developers are not the subject of a particular choice. They are dissolved in a mixture of non-volatile organic solvents. They then form colorless or almost colorless inks such as those described for example in patent application DE-A-2 644 117. These inks are clean in the sense that they do not pollute the marking device with which they are used to authenticate the document. In addition, they do not dry quickly in the marking device which can for example be a felt-tip pen or an ink pad.
  • the document to be authenticated can have any fibrous structure, purely cellulosic or partly synthetic, to which additives such as mineral fillers, binders, various resistance agents, tinting dyes, bonding products, etc. can be added.
  • the document can also include other authentication means, for example it can include one or more watermarks.
  • This document can also consist of a synthetic sheet, for example biaxially stretched polyethylene and coated with a layer facilitating its printing. It may for example be a document consisting of POLYART R manufactured by the company ARJOBEX R.
  • the solid compound is introduced into the coating composition.
  • the compound participating in the authentication of the document can therefore be incorporated en masse during the manufacture of the support or be put on the surface, advantageously using a sizing press or an impregnator, but any other coating means can suit.
  • An essential characteristic of the invention is that the compound is in solid form in the finished document (generally after drying of the support), but it can be introduced in liquid form, in solution or in suspension or emulsion or in pasty form during the making of the document.
  • an additive can be introduced to precipitate it if necessary.
  • This compound can be introduced in the whole document or in a part of it.
  • the inscription or authentication mark can be any inscription, for example a date, the name of a company, a design, etc.
  • the representation of the registration may constitute additional authentication. It can be apostilled for example using a stamp, a parking meter, a numberer, a punch, rubber, metal or any other material. Any stamping or composting device capable of receiving a liquid composition, more or less viscous, may be suitable for transferring the authentication composition.
  • the invention therefore provides a means of authenticating a document during its cancellation which is at the same time simple, economical, rapid and which does not pollute by the device comprising the ink.
  • the inhibitory composition blocks the active site of the compound present in the document and / or the active site of the compound present in the authentication composition.
  • They can also prevent the colored reaction by making a physical barrier so that the reagent and the coreactive cannot be in contact to react. It can be composed so as to act as a barrier and also to block the active sites by mixing various suitable compounds.
  • This inhibiting composition is deposited in certain places on the face of the document which comprises the solid compound when this compound is in a layer, on one or both sides of the document when the solid compound has been introduced en masse during the manufacture of the document or layered on both sides, the front and back of the document are both responsive.
  • the inhibitory composition can be deposited in certain places, in a random manner, or on the contrary in perfectly identified places. When it is deposited on both sides, it can be symmetrically or asymmetrically.
  • the inhibitory composition placed on the front may be of a different nature from that placed on the back. The number of possibilities is vast.
  • the composition can be deposited in the form of strips, drawings, numbers, letters, etc.
  • the composition is preferably in the form of an ink and is deposited by a suitable printing technique. According to the invention, it is preferred to deposit it by offset and more particularly by wet offset. This inhibiting composition is preferably colorless.
  • the authentication composition may be colorless. In this case, no mark appears on the desensitized areas of the document when it is canceled with the authentication composition.
  • the authentication composition can be colored using a dye (or a colored pigment), the final color of the ink being different from that given by the authentication reaction.
  • a dye or a colored pigment
  • the final color of the ink being different from that given by the authentication reaction.
  • an association according to the invention consisting of a document comprising at least in mass an electron acceptor and of an associated authentication composition containing at least one electron donor, it is possible to use as inhibiting composition , a composition which comprises at least one nucleophilic compound such as quaternary ammonium salts, compounds having at least one amine function, compounds comprising at least one alcohol function, alkoxylated compounds.
  • a nucleophilic compound such as quaternary ammonium salts, compounds having at least one amine function, compounds comprising at least one alcohol function, alkoxylated compounds.
  • a desensitizing ink based on alkoxylated compounds and specially adapted for wet offset printing is described in patent GB 2 013 228 from the company SICPA.
  • These compounds are for example an ethoxylated octylphenol, an ethoxylated nonylphenol, a block copolymer of propylene oxide and ethylene oxide, a polypropylene glycol.
  • the inhibitory composition acts as a physical barrier between the reagents giving rise to the authentication reaction, it is possible, for example, to use a composition based on polyvinyl alcohol or an unpigmented ink.
  • the latter type of inhibitory composition may be suitable for any type of color reaction.
  • the invention provides the combination of a document to be authenticated and an authentication composition producing a distinctive inscription on the document to be authenticated, the document containing at least one compound participating in the authentication, this compound being in solid form. in the document and reacting, when marking with the authentication composition, to form an inscription, said document being characterized in that it comprises at least one desensitized zone.
  • the document may include a zone desensitized by an inhibiting composition containing a nucleophilic compound.
  • the nucleophilic compound is chosen from the group formed by quaternary ammonium salts, compounds comprising at least one alcohol function, by alkoxylated compounds or their mixtures.
  • the nucleophilic compound can be a glycol.
  • the document comprises at least one zone desensitized by an inhibiting composition which forms a physical barrier between the reagent of the document and the coreagent of the authentication composition.
  • the inhibitory composition can mainly comprise polyvinyl alcohol.
  • the invention further relates to a method of authenticating a document such as impregnating the felt with a marker device using an authentication composition consisting of a colorless fatty ink and a co-reactant. colorless and that an inscription is reported on the document using said device, this inscription becoming colored due to the reaction between the compound participating in the authentication and the coreactive, with the exception of the desensitized zone or zones .
  • the method of authenticating a document can be such that the felt is impregnated with a marking device using an authentication composition consisting of a colored fatty ink and a co-reactant and the an inscription using said device is transferred to the document using said device, this inscription taking on a color due to the reaction between the solid compound participating in the authentication and the co-reactant, color nuanced by the original color of the ink, and at or at the desensitized places the inscription having the original color of the ink, this original color being different from that of the colored reaction.
  • the invention therefore makes it possible to quickly and cleanly authenticate a document when it is canceled.
  • Example 2 is used again, but the authentication ink of example 2b) is colored with a blue dye.
  • part of the ARJOMARI R inscription appears in red-purple on the non-desensitized areas and another part appears in blue on the desensitized areas. On the face with no desensitized area, the inscription appears in full in red-violet.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Printing Methods (AREA)
  • Color Printing (AREA)

Description

L'invention concerne une combinaison d'un document authentifiable et d'une composition d'authentification, ainsi que le procédé d'authentification.The invention relates to a combination of an authenticated document and an authentication composition, as well as the authentication method.

On connait déjà de nombreux systèmes pour authentifier un document, par exemple on réalise dans le papier, lors de sa fabrication, des filigranes à l'aide d'un rouleau filigraneur associé à une table plate ou à l'aide d'une forme ronde emboutie. On peut aussi incorporer dans ou sur le papier des éléments de sécurité tels que fils, fibres, planchettes qui peuvent éventuellement être fluorescents, iridescents, magnétiques ou métalliques. On peut aussi utiliser d'autres moyens pour authentifier un document tels que l'impression d'un dessin élaboré à la surface du document, l'encre d'impression et le type d'impression étant choisis et sélectionnés. Par exemple on peut utiliser une impression taille douce qui donne une impression en relief caractéristique. Dans le cas de documents comme les chèques, les titres de transport, les billets d'entrée ou d'abonnement à des manifestations culturelles ou sportives, ou des timbres, devant être validés par une oblitération, il est intéressant que cette oblitération serve non seulement à valider mais aussi à authentifier le document.We already know many systems to authenticate a document, for example we realize in paper, during its manufacture, watermarks using a watermark roll associated with a flat table or using a round shape stamped. It is also possible to incorporate into or on the paper security elements such as threads, fibers, boards which may possibly be fluorescent, iridescent, magnetic or metallic. Other means can also be used to authenticate a document such as printing a drawing drawn up on the surface of the document, the printing ink and the type of printing being chosen and selected. For example, one can use an intaglio print which gives a characteristic relief impression. In the case of documents such as checks, tickets, tickets for entry or subscription to cultural or sporting events, or stamps, to be validated by a cancellation, it is interesting that this cancellation not only serves to validate but also to authenticate the document.

On a décrit dans la demande GB-1 507 454, déposée par WIGGINS-TEAPE, un procédé d'authentification d'un document lors de son oblitération. Cette demande décrit le procédé d'authentification suivant: On imprime le document sur un papier de sécurité constitué d'un papier de base, couché avec une composition contenant un leucocolorant, un pigment inerte et un liant, et on effectue l'authentification par oblitération du papier à l'aide d'une composition d'authentification comprenant en mélange une encre foncée pigmentée et une solution d'un composé qui réagit avec le leucocolorant pour former une couleur.Application GB-1 507 454, filed by WIGGINS-TEAPE, describes a method for authenticating a document when it is canceled. This request describes the following authentication method: The document is printed on a security paper consisting of a base paper, coated with a composition containing a leuco-dye, an inert pigment and a binder, and the authentication is carried out by obliteration. paper using an authentication composition comprising mixing a dark pigmented ink and a solution of a compound which reacts with the leuco dye to form a color.

Le principe de la réaction colorée utilisée dans cette demande est celui bien connu pour les papiers autocopiants sans carbone. Ainsi on encapsule le leucocolorant donneur d'électrons avec un solvant dans des microcapsules qui se rompent sous le pression exercée lors de l'oblitération avec un tampon encreur et réagit avec le composé acide, accepteur d'électrons, contenu dans la composition d'authentification. Ce n'est pas l'inscription qui est faite lors de l'oblitération qui a une couleur particulière permettant d'authentifier le document, mais c'est un halo qui entoure cette composition. En effet,le leucocolorant qui est sous forme liquide est partiellement absorbé par le tampon encreur lors de l'oblitération, et de ce fait il contamine l'encre qui, si elle ne contient pas de pigments foncés, prend la couleur d'authentification et n'est donc plus valable pour authentifier le document. Ainsi la demanderesse de ce brevet a été obligée d'utiliser une encre foncée pigmentée pour masquer la coloration d'authentification prématurément développée dans le tampon encreur et a dû rajouter une charge inerte dans la couche comprenant les microcapsules de leucocolorant pour faire diffuser le réactif acide autour de l'oblitération qui développe alors un halo de la couleur d'authentification. L'encre foncée permet aussi de faire ressortir l'inscription à l'intérieur du halo.The principle of the colored reaction used in this application is that well known for carbonless carbonless papers. Thus, the electron donor leuco dye is encapsulated with a solvent in microcapsules which rupture under the pressure exerted during the obliteration with an ink pad and reacts with the acid compound, electron acceptor, contained in the authentication composition. . It is not the inscription which is made during the cancellation which has a particular color allowing to authenticate the document, but it is a halo which surrounds this composition. Indeed, the leucocolourant which is in liquid form is partially absorbed by the ink pad during the obliteration, and therefore it contaminates the ink which, if it does not contain dark pigments, takes on the authentication color and is no longer valid for authenticating the document. Thus, the applicant for this patent was forced to use a dark pigmented ink to mask the authentication coloration prematurely developed in the ink pad and had to add an inert filler in the layer comprising the leuco-dye microcapsules to diffuse the acid reagent. around the cancellation which then develops a halo of the authentication color. The dark ink also highlights the inscription inside the halo.

Ce procédé présente de nombreux inconvénients:

  • il est complexe,
  • il faut ajouter une charge inerte dans la couche du papier et celà nécessite donc une opération supplémentaire, ce qui augmente le prix de revient du document,
  • le halo apparaissant autour de l'inscription nuit à la lisibilité de l'inscription et donne un aspect un peu sale au document ainsi authentifié,
  • il n'est pas certain que ce soit le réactif acide qui diffuse et développe un halo coloré, mais il se peut que ce soit l'encre contaminée et celà pose un problème de vitesse de diffusion,
  • l'encapsulation du leucocolorant est coûteuse,
  • le couchage des microcapsules nécessite une opération hors machine à papier.
This process has many drawbacks:
  • it is complex,
  • an inert filler must be added to the layer of paper and this therefore requires an additional operation, which increases the cost price of the document,
  • the halo appearing around the inscription harms the legibility of the inscription and gives a slightly dirty appearance to the document thus authenticated,
  • it is not certain that it is the acid reagent which diffuses and develops a colored halo, but it may be that the contaminated ink and this poses a problem of speed of diffusion,
  • the encapsulation of the leuco-dye is expensive,
  • coating the microcapsules requires an operation outside the paper machine.

La demande EP-A-90130 décrit un procédé d'authentification d'un titre de valeur en papier qui se caractérise par le fait que l'on dépose sur la feuille de papier l'une des deux substances d'un système de réaction colorée se composant d'un formateur de couleur donneur d'électrons et d'un développeur de couleur accepteur d'électrons, l'une des substances étant donc à la surface du titre et l'autre étant dans un distributeur qui permet d'écrire ou d'imprimer sur cette surface .EP-A-90130 describes a method of authenticating a paper security which is characterized by the fact that one of the two substances of a colored reaction system is deposited on the paper sheet. consisting of an electron donor color trainer and an electron acceptor color developer, one of the substances therefore being on the surface of the title and the other being in a dispenser which makes it possible to write or to print on this surface.

Un inconvénient de ce procédé est que, comme pour la demande GB 1507454, l'un des réactifs se trouve en surface du papier, or il est facile,pour un contrefacteur de s'approvisionner en de tels papiers qui sont usuels dans le domaine des papiers autocopiants classiques. Il est donc facile de contrefaire ces titres de valeurOne drawback of this process is that, as in application GB 1507454, one of the reagents is found on the surface of the paper, but it is easy for an infringer to obtain such papers which are customary in the field of classic carbonless papers. It is therefore easy to counterfeit these valuable securities

La demande FR-A-2315132 décrit un procédé d'authentification de titres de valeur revêtus d'une encre au carbone appliquée à chaud qui se caractérise par le fait que ce revêtement contient un réactif qui réagit avec un autre composé apporté à la surface du titre lors de l'authentification et produisant une coloration caractéristique. En particulier on peut mettre un formateur de couleur dans le revêtement et utiliser comme coréactif une solution d'un développeur de couleur appropriéApplication FR-A-2315132 describes a method of authenticating valuable securities coated with a hot-applied carbon ink which is characterized by the fact that this coating contains a reagent which reacts with another compound brought to the surface of the title during authentication and producing a characteristic coloring. In particular we can put a color former in the coating and use as co-reactant a solution of an appropriate color developer

Ce procédé présente donc aussi l'inconvénient que le réactif soit en surface du titre à authentifier .De plus le procédé est assez compliqué, car il nécessite l'utilisation d'un buvard ou d'un tampon d'ouate pour aspirer le liquide réactionnel.This process therefore also has the disadvantage that the reagent is on the surface of the voucher to be authenticated. In addition, the process is quite complicated, since it requires the use of a blotter or a cotton ball to aspirate the reaction liquid. .

Dans le document EP-A-0 174 885 on décrit des papiers de sécurité qui réagissent aux crayons effaceurs d'encre. Ces crayons contiennent des composés oxydo-réducteurs. Ainsi, lorsqu'un papier comporte une inscription colorée qui est obtenue à l'aide d'une encre, le crayon effaceur décolore l'encre. Lescrayons effaceurs fonctionnnent sur le principe du permanganate de potassium conjugué au bisulfite de sodium. De tels papiers contiennent un agent susceptible de former un complexe coloré avec du Fe2+ et du Fe3+. Lorqu'on fait agir un réducteur, le Fe3+ devient du Fe2+ qui forme alors un complexe avec l'agent, ce complexe étant coloré. l'accepteur d'électrons Fe3+ n'est absolument pas un formateur de couleur (c'est-à-dire qu'il devient coloré (lui_même). Il ne devient coloré qu'en présence de l'agent avec lequel il forme un complexe.In document EP-A-0 174 885, security papers are described which react to ink erasing pencils. These pencils contain redox compounds. Thus, when a paper has a colored inscription which is obtained using ink, the eraser pencil discolors the ink. Pencils erasers work on the principle of potassium permanganate conjugated with sodium bisulfite. Such papers contain an agent capable of forming a colored complex with Fe 2+ and Fe 3+ . When a reducing agent is acted on, the Fe 3+ becomes Fe 2+ which then forms a complex with the agent, this complex being colored. the electron acceptor Fe 3+ is absolutely not a color former (ie it becomes colored (itself). It only becomes colored in the presence of the agent with which it forms a complex.

Dans le document EP-A-0 190 087 on ne mentionne que l'addition de benzonitrile ou ses dérivés pour obtenir une coloration par le crayon effaceur d'encre. On ne décrit absolument pas la réaction chimique qui entre en jeu, mais il est probable que là encore il s'agit d'une réaction de complexage avec le nitrile pour donner un complexe coloré.In document EP-A-0 190 087, only the addition of benzonitrile or its derivatives is mentioned to obtain coloring by the ink erasing pencil. There is absolutely no description of the chemical reaction which comes into play, but it is likely that here again it is a complexing reaction with nitrile to give a colored complex.

L'invention vise donc à fournir un procédé d'authentification d'un document lors de son oblitération, ce procédé consistant à utiliser le principe d'une réaction colorée entre un réactif contenu dans le document et un coréactif contenu dans l'encre d'authentification, tout en palliant ou évitant les inconvénients de l'art antérieur.The invention therefore aims to provide a method of authenticating a document when it is obliterated, this method consisting in using the principle of a colored reaction between a reagent contained in the document and a co-reactant contained in the ink. authentication, while overcoming or avoiding the drawbacks of the prior art.

Un but de l'invention est donc de fournir un procédé d'authentification d'un document lors de son oblitération, qui soit à la fois simple, rapide, économique.An object of the invention is therefore to provide a method of authenticating a document during its cancellation, which is at the same time simple, rapid, economical.

Un autre but de l'invention est de fournir un procédé d'authentification qui donne une inscription nette et lisible sur le document, l'inscription apparaissant en couleur lors de l'oblitération.Another object of the invention is to provide an authentication method which gives a clear and legible inscription on the document, the inscription appearing in color during the cancellation.

Un troisième but de l'invention est de fournir un document authentifiable et sa composition d'authentification sans utiliser la technique des microcapsules.A third object of the invention is to provide an authenticated document and its authentication composition without using the technique of microcapsules.

Un autre but de l'invention est de fournir un tel système selon lequel le document peut être authentifié aussi bien au recto qu'au verso. Ceci permet de le distinguer facilement des feuilles disponibles dans le commerce, qui comportent une couleur active uniquement sur une face et ne réagissent que d'un seul côté.Another object of the invention is to provide such a system according to which the document can be authenticated both on the front and on the back. This makes it easy to distinguish it from the leaves commercially available, which have an active color only on one side and react only on one side.

Un autre but de l'invention est de fournir un tel système avec un document qui peut être facilement filigrané, le filigrane étant un autre élément de sécurité important. Les feuilles couchées ne comportent généralement pas de filigrane car il serait masqué par la couche ou abîmé lors du dépôt de la couche.Another object of the invention is to provide such a system with a document which can be easily watermarked, the watermark being another important security element. The coated sheets generally do not have a watermark because it would be hidden by the layer or damaged during the deposition of the layer.

On atteint les buts de l'invention en utilisant comme réactif dans le document un composé qui se trouve sous forme solide dans le document, ainsi ce composé ne peut pas être absorbé par un tampon encreur ou un autre dispositif de marquage et contaminer la composition d'authentification contenue dans ce dispositif.The objects of the invention are achieved by using as a reagent in the document a compound which is in solid form in the document, thus this compound cannot be absorbed by an ink pad or other marking device and contaminate the composition of authentication contained in this device.

L'invention fournit donc une combinaison d'un document à authentifier lors de son oblitération, comportant un réactif participant à la réaction d'authentification choisi parmi les accepteurs d'électron(s) développeurs de couleur et d'une composition d'authentification contenant un coréactif réagissant avec le réactif du document pour produire une inscription colorée distinctive d'oblitération sur le document à authentifier, la composition d'authentification étant une encre grasse contenant un coréactif choisi parmi les donneurs d'électron(s) formateurs de couleur, caractérisée par le fait que le document contient en masse et sous forme solide ledit réactif. qui est choisi dans le groupe formé par des charges minérales acides, résines phénoliques, composés du zinc et leurs mélanges.The invention therefore provides a combination of a document to be authenticated during its obliteration, comprising a reagent participating in the authentication reaction chosen from the acceptors of color developer electron (s) and an authentication composition containing a co-reactant reacting with the reagent of the document to produce a distinctive colored inscription of cancellation on the document to be authenticated, the authentication composition being a fatty ink containing a co-reactant chosen from the donor of color-forming electron (s), characterized by the fact that the document contains in mass and in solid form said reagent. which is chosen from the group formed by acid mineral fillers, phenolic resins, zinc compounds and their mixtures.

Comme développeur de couleur on peut employer, en particulier, une bentonite (appelée montmorillonite), et encore plus préférentiellement une bentonite qui a une surface spécifique (mesurée par la méthode BET, selon la norme DIN 66 131, le gaz étant de l'azote) supérieure à 200 m2/g.As a color developer, it is possible to use, in particular, a bentonite (called montmorillonite), and even more preferably a bentonite which has a specific surface (measured by the BET method, according to standard DIN 66 131, the gas being nitrogen ) greater than 200 m 2 / g.

Il est en effet avantageux d'utiliser une charge ayant une surface spécifique élevée car elle permet d'améliorer l'imprimabilité du document. L'oblitération qui est aussi la marque d'authentification a ainsi une bonne définition; elle est nette et bien lisible.It is in fact advantageous to use a filler having a high specific surface since it makes it possible to improve the printability of the document. The cancellation which is also the mark of authentication thus has a good definition; it is sharp and clearly legible.

Les coloformers associés à ces développeurs de couleur ne font pas l'objet d'un choix particulier. Ils sont mis en solution dans un mélange de solvants organiques non volatils. Ils forment alors des encres incolores ou quasi incolores comme celles qui sont décrites par exemple dans la demande de brevet DE-A-2 644 117. Ces encres sont propres dans le sens qu'elles ne polluent pas le dispositif de marquage avec lequel elles sont utilisées pour authentifier le document. De plus elles ne sèchent pas rapidement dans le dispositif de marquage qui peut par exemple être un crayon feutre ou un tampon encreur.The coloformers associated with these color developers are not the subject of a particular choice. They are dissolved in a mixture of non-volatile organic solvents. They then form colorless or almost colorless inks such as those described for example in patent application DE-A-2 644 117. These inks are clean in the sense that they do not pollute the marking device with which they are used to authenticate the document. In addition, they do not dry quickly in the marking device which can for example be a felt-tip pen or an ink pad.

On peut par exemple associer à un document donné à authentifier,des encres donnant des inscriptions ou marques de couleurs différentes, il suffit pour celà de changer de colorformer. On peut aussi mélanger plusieurs colorformers dans l'encre afin d'obtenir une couleur particulière.One can for example associate with a document given to authenticate, inks giving inscriptions or marks of different colors, it suffices for that to change colorformer. You can also mix several colorformers in the ink to obtain a particular color.

Le document à authentifier peut avoir une structure fibreuse quelconque, purement cellulosique ou en partie synthétique, à laquelle on peut ajouter des adjuvants tels que des charges minérales, liants, agents de résistance divers, colorants de nuançage, produits de collage, etc. Le document peut aussi comporter d'autres moyens d'authentification, par exemple il peut comporter un ou plusieurs filigranes.The document to be authenticated can have any fibrous structure, purely cellulosic or partly synthetic, to which additives such as mineral fillers, binders, various resistance agents, tinting dyes, bonding products, etc. can be added. The document can also include other authentication means, for example it can include one or more watermarks.

Ce document peut aussi être constitué d'une feuille synthétique, par exemple du polyéthylène étiré biaxialement et couché avec une couche facilitant son impression. Il peut s'agir par exemple d'un document constitué de POLYARTR fabriqué par la société ARJOBEXR. Dans ce cas, le composé solide est introduit dans la composition de couchage. Le composé participant à l'authentification du document peut donc être incorporé en masse lors de la fabrication du support ou être mis en surface, avantageusement à l'aide d'une presse encoleuse ou d'une imprégnatrice, mais tout autre moyen de couchage peut convenir. Une caractéristique essentielle de l'invention est que le composé se trouve sous forme solide dans le document fini (généralement après séchage du support), mais il peut être introduit sous forme liquide, en solution ou en suspension ou émulsion ou sous forme pâteuse lors de la fabrication du document. On peut introduire éventuellement un additif pour le faire précipiter si c'est nécessaire. On peut introduire ce composé dans la totalité du document ou dans une partie de celui-ci.This document can also consist of a synthetic sheet, for example biaxially stretched polyethylene and coated with a layer facilitating its printing. It may for example be a document consisting of POLYART R manufactured by the company ARJOBEX R. In this case, the solid compound is introduced into the coating composition. The compound participating in the authentication of the document can therefore be incorporated en masse during the manufacture of the support or be put on the surface, advantageously using a sizing press or an impregnator, but any other coating means can suit. An essential characteristic of the invention is that the compound is in solid form in the finished document (generally after drying of the support), but it can be introduced in liquid form, in solution or in suspension or emulsion or in pasty form during the making of the document. Optionally, an additive can be introduced to precipitate it if necessary. This compound can be introduced in the whole document or in a part of it.

L'inscription ou marque d'authentification peut être une inscription quelconque, par exemple une date, le nom d'une société, un dessin, etc. La représentation de l'inscription peut constituer une authentification supplémentaire. Elle peut être apostillée par exemple à l'aide d'un timbre, un horodateur, un numéroteur, un poinçon, en caoutchouc, en métal ou toute autre matière. Tout dispositif de timbrage ou de compostage pouvant recevoir une composition liquide, plus ou moins visqueuse, peut convenir pour reporter la composition d'authentification.The inscription or authentication mark can be any inscription, for example a date, the name of a company, a design, etc. The representation of the registration may constitute additional authentication. It can be apostilled for example using a stamp, a parking meter, a numberer, a punch, rubber, metal or any other material. Any stamping or composting device capable of receiving a liquid composition, more or less viscous, may be suitable for transferring the authentication composition.

L'invention fournit donc un moyen d'authentification d'un document lors de son oblitération qui est à la fois simple, économique, rapide et qui ne pollue par le dispositif comportant l'encre.The invention therefore provides a means of authenticating a document during its cancellation which is at the same time simple, economical, rapid and which does not pollute by the device comprising the ink.

Pour améliorer encore la sécurité du document à authentifier on peut en outre traiter la surface du document à un ou plusieurs endroits par une composition qui inhibe la réaction entre le réactif contenu dans le document et le coréactif contenu dans la composition d'authentification. A ces endroits désensibilisés il ne se développe donc aucune marque colorée due à la réaction d'authentification lors de l'oblitération du document.To further improve the security of the document to be authenticated, it is also possible to treat the surface of the document in one or more places with a composition which inhibits the reaction between the reagent contained in the document and the co-reactant contained in the authentication composition. In these desensitized places it does not therefore develops no colored mark due to the authentication reaction when the document is canceled.

La composition inhibitrice bloque le site actif du composé présent dans le document et/ou le site actif du composé présent dans la composition d'authentification.The inhibitory composition blocks the active site of the compound present in the document and / or the active site of the compound present in the authentication composition.

Elles peut également empêcher la réaction colorée en faisant une barrière physique ce qui fait que le réactif et le coréactif ne peuvent pas se trouver en contact pour réagir. Elle peut être composée de façon à jouer le rôle de barrière et aussi à bloquer les sites actifs en mélangeant divers composés adéquats.They can also prevent the colored reaction by making a physical barrier so that the reagent and the coreactive cannot be in contact to react. It can be composed so as to act as a barrier and also to block the active sites by mixing various suitable compounds.

Cette composition inhibitrice est déposée à certains endroits sur la face du document qui comporte le composé solide lorsque ce composé est dans une couche, sur l'une ou les deux faces du document lorsque le composé solide a été introduit en masse lors de la fabrication du document ou mis en couche sur les deux faces, le recto et le verso du document étant tous les deux réactifs.This inhibiting composition is deposited in certain places on the face of the document which comprises the solid compound when this compound is in a layer, on one or both sides of the document when the solid compound has been introduced en masse during the manufacture of the document or layered on both sides, the front and back of the document are both responsive.

La composition inhibitrice peut être déposée à certains endroits, de façon aléatoire, ou au contraire à des endroits parfaitement repérés. Lorsqu'elle est déposée sur les deux faces, elle peut l'être de façon symétrique ou asymétrique. La composition inhibitrice placée sur le recto peut être de nature différente de celle placée sur le verso. Le nombre de possibilités est vaste. La composition peut être déposée sous forme de bandes, de dessins, de chiffres, de lettres, etc.The inhibitory composition can be deposited in certain places, in a random manner, or on the contrary in perfectly identified places. When it is deposited on both sides, it can be symmetrically or asymmetrically. The inhibitory composition placed on the front may be of a different nature from that placed on the back. The number of possibilities is vast. The composition can be deposited in the form of strips, drawings, numbers, letters, etc.

La composition est de préférence sous forme d'une encre et est déposée par une technique d'impression adaptée. Selon l'invention, on préfère la déposer par offset et plus particulièrement par offset humide. Cette composition inhibitrice est de préférence incolore.The composition is preferably in the form of an ink and is deposited by a suitable printing technique. According to the invention, it is preferred to deposit it by offset and more particularly by wet offset. This inhibiting composition is preferably colorless.

La composition d'authentification peut être incolore. Dans ce cas, il n'apparaît aucune marque sur les zones désensibilisées du document lorsqu'on l'oblitère avec la composition d'authentification.The authentication composition may be colorless. In this case, no mark appears on the desensitized areas of the document when it is canceled with the authentication composition.

La composition d'authentification peut être colorée a l'aide d'un colorant (ou d'un pigment coloré), la couleur finale de l'encre étant différente de celle donnée par la réaction d'authentification. Ainsi sur les zones désensibilisées, lors de l'oblitération, on pourra observer des marques de la couleur originale de la composition d'authentification et sur les zones non désensibilisées, on observera des marques d'une couleur différente qui sera celle de la réaction colorée nuancée par la couleur de l'encre originale.The authentication composition can be colored using a dye (or a colored pigment), the final color of the ink being different from that given by the authentication reaction. Thus on the desensitized zones, during the obliteration, one will be able to observe marks of the original color of the authentication composition and on the non-desensitized zones, one will observe marks of a different color which will be that of the colored reaction nuanced by the color of the original ink.

Dans le cas d'une association selon l'invention constituée d'un document comportant au moins en masse un accepteur d'électrons et d'une composition d'authentification associée contenant au moins un donneur d'électrons, on peut utiliser comme composition inhibitrice, une composition qui comporte au moins un composé nucléophile tels que des sels d'ammonium quaternaires, des composés possédant au moins une fonction amine, des composés comportant au moins une fonction alcool, des composés alcoxylés.In the case of an association according to the invention consisting of a document comprising at least in mass an electron acceptor and of an associated authentication composition containing at least one electron donor, it is possible to use as inhibiting composition , a composition which comprises at least one nucleophilic compound such as quaternary ammonium salts, compounds having at least one amine function, compounds comprising at least one alcohol function, alkoxylated compounds.

Une encre désensibilisatrice à base de composés alcoxylés et adaptée spécialement à l'impression offset humide est décrite dans le brevet GB 2 013 228 de la société SICPA. Ces composés sont par exemple un octylphénol éthoxylé, un nonylphénol éthoxylé, un copolymère bloc d'oxyde de propylène et d'oxyde d'éthylène, un polypropylène glycol.A desensitizing ink based on alkoxylated compounds and specially adapted for wet offset printing is described in patent GB 2 013 228 from the company SICPA. These compounds are for example an ethoxylated octylphenol, an ethoxylated nonylphenol, a block copolymer of propylene oxide and ethylene oxide, a polypropylene glycol.

Lorsque la composition inhibitrice joue le rôle de barrière physique entre les réactifs donnant lieu à la réaction d'authentification, on peut par exemple utiliser une composition à base d'alcool polyvinylique ou une encre non pigmentée. Ce dernier type de composition inhibitrice peut convenir pour tout type de réaction colorée.When the inhibitory composition acts as a physical barrier between the reagents giving rise to the authentication reaction, it is possible, for example, to use a composition based on polyvinyl alcohol or an unpigmented ink. The latter type of inhibitory composition may be suitable for any type of color reaction.

Ainsi l'invention fournit la combinaison d'un document à authentifier et d'une composition d'authentification produisant une inscription distinctive sur le document à authentifier, le document contenant au moins un composé participant à l'authentification, ce composé étant sous forme solide dans le document et réagissant, lors du marquage par la composition d'authentification, pour former une inscription, ledit document étant caractérisé par le fait qu'il comporte au moins une zone désensibilisée.Thus the invention provides the combination of a document to be authenticated and an authentication composition producing a distinctive inscription on the document to be authenticated, the document containing at least one compound participating in the authentication, this compound being in solid form. in the document and reacting, when marking with the authentication composition, to form an inscription, said document being characterized in that it comprises at least one desensitized zone.

Le document peut comporter une zone désensibilisée par une composition inhibitrice contenant un composé nucléophile.The document may include a zone desensitized by an inhibiting composition containing a nucleophilic compound.

De préférence, le composé nucléophile est choisi dans le groupe formé par des sels d'ammonium quaternaire, des composés comportant au moins une fonction alcool, par des composés alcoxylés ou leurs mélanges.Preferably, the nucleophilic compound is chosen from the group formed by quaternary ammonium salts, compounds comprising at least one alcohol function, by alkoxylated compounds or their mixtures.

Le composé nucléophile peut être un glycol.The nucleophilic compound can be a glycol.

Le document comporte au moins une zone désensibilisée par une composition inhibitrice qui forme une barrière physique entre le réactif du document et le coréactif de la composition d'authentification.The document comprises at least one zone desensitized by an inhibiting composition which forms a physical barrier between the reagent of the document and the coreagent of the authentication composition.

La composition inhibitrice peut comporter principalement de l'alcool polyvinylique.The inhibitory composition can mainly comprise polyvinyl alcohol.

L'invention concerne en outre un procédé d'authentification d'un document tel qu'on imprègne le feutre d'un dispositif marqueur à l'aide d'une composition d'authentification constituée d'une encre incolore grasse et d'un coréactif incolore et que l'on reporte sur le document une inscription à l'aide dudit dispositif, cette inscription devenant colorée du fait de la réaction entre le composé participant à l'authentification et le coréactif, à l'exception de la ou des zones désensibilisées.The invention further relates to a method of authenticating a document such as impregnating the felt with a marker device using an authentication composition consisting of a colorless fatty ink and a co-reactant. colorless and that an inscription is reported on the document using said device, this inscription becoming colored due to the reaction between the compound participating in the authentication and the coreactive, with the exception of the desensitized zone or zones .

Le procédé d'authentification d'un document peut être tel qu'on imprègne le feutre d'un dispositif marqueur à l'aide d'une composition d'authentification constituée d'une encre grasse colorée et d'un coréactif et que l'on reporte sur le document à l'aide dudit dispositif une inscription à l'aide dudit dispositif, cette inscription prenant une couleur du fait de la réaction entre le composé solide participant à l'authentification et le coréactif, couleur nuancée par la couleur originale de l'encre, et à ou aux endroits désensibilisés l'inscription ayant la couleur originale de l'encre, cette couleur originale étant différente de celle de la réaction colorée.The method of authenticating a document can be such that the felt is impregnated with a marking device using an authentication composition consisting of a colored fatty ink and a co-reactant and the an inscription using said device is transferred to the document using said device, this inscription taking on a color due to the reaction between the solid compound participating in the authentication and the co-reactant, color nuanced by the original color of the ink, and at or at the desensitized places the inscription having the original color of the ink, this original color being different from that of the colored reaction.

L'invention sera mieux comprise à l'aide des exemples non limitatifs suivants.The invention will be better understood using the following nonlimiting examples.

EXEMPLE 1EXAMPLE 1

  • a) Le document à authentifier est constitué d'une feuille de papier. On met en suspension aqueuse les composants habituels d'un papier, par exemple des fibres cellulosiques, éventuellement en mélage avec des fibres synthétiques, des charges, des liants, des floculants. On ajoute à cette suspension le composé participant à l'authentification. Ce composé ajouté en masse l'est à raison de 15% en poids sec par rapport aux fibres de cellulose; on forme une feuille sur une table plate d'une machine à papier traditionnelle à laquelle on associe un rouleau filigraneur.
    Le composé participant à l'authentification est une bentonite, de surface spécifique de 270 m2/g, la taille des particules est de 2,5 micromètres environ. Cette bentonite est commercialisée par la Société Française des Bentonites et Dérivés. Ce composé est sous forme solide dans le document fini.    a) The document to be authenticated consists of a sheet of paper. The usual components of a paper, for example cellulose fibers, are optionally put in aqueous suspension, possibly mixed with synthetic fibers, fillers, binders, flocculants. The compound participating in the authentication is added to this suspension. This compound added in mass is at a rate of 15% by dry weight relative to the cellulose fibers; a sheet is formed on a flat table of a traditional paper machine with which a watermark roll is associated.
    The compound participating in the authentication is a bentonite, with a specific surface of 270 m 2 / g, the particle size is approximately 2.5 micrometers. This bentonite is marketed by the French Society of Bentonites and Derivatives. This compound is in solid form in the finished document.
  • b) La composition d'authentification est une encre liquide incolore grasse à base de composés glycérophtaliques, formophénoliques et d'une huile végétale. La composition contient en outre un coréactif qui est un colorformer, composé de bisuidolylphtalide ajouté dans cette encre à un taux de 4% en poids sec par rapport à l'encre incolore grasse.
    Cette composition est imprégnée dans un feutre encreur. On place un timbre de caoutchouc sur lequel figure la marque ARJOMARIR contre ce feutre. On tamponne alors le document à l'aide du tampon encreur. L'inscription ARJOMARIR apparait instantanément sur le document. Cette inscription est parfaitement lisible, non diffuse, c'est à dire que ses contours sont parfaitement nets. Le document conserve un aspect propre et le tampon encreur n'est pas contaminé par la composition d'authentification.    b) The authentication composition is a colorless fatty liquid ink based on glycerophthalic, formophenolic compounds and a vegetable oil. The composition also contains a coreagent which is a colorformer, composed of bisuidolylphthalide added in this ink at a rate of 4% by dry weight relative to the colorless fatty ink.
    This composition is impregnated in an ink felt. We place a rubber stamp on which appears the mark ARJOMARI R against this felt. The document is then stamped using the ink pad. The inscription ARJOMARI R appears instantly on the document. This inscription is perfectly legible, not diffuse, that is to say that its contours are perfectly sharp. The document retains a clean appearance and the ink pad is not contaminated by the authentication composition.

Par contre si on oblitère un papier vendu couramment dans le commerce, à l'aide de ce tampon encreur et de cette encre d'authentification, aucune inscription colorée n'apparait.On the other hand, if a paper sold commonly in the trade is obliterated, using this ink pad and this authentication ink, no colored inscription appears.

L'invention permet donc d'authentifier rapidement et proprement un document lors de son oblitération.The invention therefore makes it possible to quickly and cleanly authenticate a document when it is canceled.

EXEMPLE 2EXAMPLE 2

  • a) Le document à authentifier est constitué d'une feuille de papier. On met en suspension aqueuse les composants habituels d'un papier, par exemple des fibres cellulosiques, éventuellement en mélange avec des fibres synthétiques, des charges, des liants, des floculants. On ajoute à cette suspension, le composé participant à l'authentification. Ce composé ajouté en masse l'est à raison de 15% en poids sec par rapport aux fibres de cellulose. On forme une feuille sur une table plate d'une machine à papier traditionnelle à laquelle on associe un rouleau filigraneur.
    Le composé participant à l'authentification est une bentonite, de surface spécifique de 270 m2/g, la taille des particules est de 2,5 micromètres environ. Cette bentonite est commercialisée par la Société Française des Bentonites et Dérivés. Ce composé est sous forme solide dans le document fini.    a) The document to be authenticated consists of a sheet of paper. The usual components of a paper, for example cellulosic fibers, are suspended in aqueous, optionally in admixture with synthetic fibers, fillers, binders, flocculants. The compound participating in the authentication is added to this suspension. This compound added in mass is at a rate of 15% by dry weight relative to the cellulose fibers. A sheet is formed on a flat table of a traditional paper machine with which a watermark roll is associated.
    The compound participating in the authentication is a bentonite, with a specific surface of 270 m 2 / g, the particle size is approximately 2.5 micrometers. This bentonite is marketed by the Société Française des Bentonites and Derivatives. This compound is in solid form in the finished document.
  • b) La composition d'authentification est une encre liquide incolore grasse à base de composés glycérophtaliques, formophénoliques et d'une huile de lin. La composition contient en outre un coréactif qui est un colorformer, composé de bisuidolylphtalide ajouté dans cette encre à un taux de 4% en poids sec par rapport à l'encre incolore grasse. Cette composition est imprégnée dans un feutre encreur. On place un timbre en caoutchouc sur lequel figure la marque ARJOMARIR contre ce feutre.b) The authentication composition is a colorless fatty liquid ink based on glycerophthalic, formophenolic compounds and linseed oil. The composition also contains a coreagent which is a colorformer, composed of bisuidolylphthalide added in this ink at a rate of 4% by dry weight relative to the colorless fatty ink. This composition is impregnated in an ink felt. We place a rubber stamp on which appears the mark ARJOMARI R against this felt.
  • c) La composition inhibitrice est une encre comportant comme composé déstabilisant un glycol encre TENORR commercialisée par la société GUERIMAND VOIRON.
    Cette encre est déposée sur la feuille décrite en a), par impression offset humide. Elle est déposée sous forme de rectangles à certains endroits, sur une face du document.
    On tamponne alors le document à l'aide du tampon encreur. L'inscription ARJOMARIR apparaît instantanément en rouge sur le document, sauf aux endroits désensibilisés où aucune marque ne se forme. Sur l'autre face du document ne portant pas de zone désensibilisée, l'inscription apparaît en entier.    c) The inhibitory composition is an ink comprising as a destabilizing compound a TENOR R ink glycol sold by the company GUERIMAND VOIRON.
    This ink is deposited on the sheet described in a), by wet offset printing. It is placed in the form of rectangles in certain places on one side of the document.
    The document is then stamped using the ink pad. The inscription ARJOMARI R instantly appears in red on the document, except in desensitized areas where no mark is formed. On the other side of the document not carrying a desensitized area, the inscription appears in full.
EXEMPLE 3EXAMPLE 3

On reprend l'exemple 2 mais on colore l'encre d'authentification de l'exemple 2b) avec un colorant bleu.Example 2 is used again, but the authentication ink of example 2b) is colored with a blue dye.

Lorsqu'on tamponne le document, une partie de l'inscription ARJOMARIR apparaît en rouge-violet sur les zones non désensibilisées et une autre partie apparaît en bleu sur les zones désensibilisées. Sur la face ne portant aucune zone désensibilisée, l'inscription apparaît en entier en rouge-violet.When the document is stamped, part of the ARJOMARI R inscription appears in red-purple on the non-desensitized areas and another part appears in blue on the desensitized areas. On the face with no desensitized area, the inscription appears in full in red-violet.

Claims (12)

  1. Combination of a document authenticable during its cancellation comprising a reagent which participates in the authentication reaction selected from colour developer electron acceptors and an authentication composition which contains a co-reagent which reacts with the reagent of the document to produce a distinctive coloured cancellation inscription on the document to be authenticated, the authentication composition being a fatty ink which contains a co-reagent selected from the electron releasing colour formers, characterised by the fact that the document contains in mass and in the solid form said reagent which is selected from the group formed by acid mineral fillers, phenolic resins, zinc compounds and mixtures thereof.
  2. Combination according to claim 1, characterised by the fact that the acid mineral filler is a bentonite.
  3. Combination according to claim 2, characterised by the fact that the bentonite has a specific surface greater than 200 m2/g.
  4. Combination according to one of claims 1 to 3, characterised by the fact that the document comprises at least one desensitised zone.
  5. Combination according to claim 4, characterised by the fact that the document comprises at least one zone desensitised by an inhibitory composition which contains a nucleophilic compound.
  6. Combination according to claim 5, characterised by the fact that the nucleophilic compound is selected from the group formed by quaternary ammonium salts, compounds which comprise at least one alcohol function, by alkoxylated compounds, or mixtures thereof.
  7. Combination according to claim 6, characterised by the fact that the compound is a glycol.
  8. Combination according to claim 4, characterised by the fact that the document comprises at least one zone desensitised by an inhibitory composition which forms a physical barrier between the reagent of the document and the co-reagent of the authentication composition.
  9. Combination according to claim 8, characterised by the fact that the inhibitory composition principally contains polyvinyl alcohol.
  10. Combination according to one of claims 4 to 9, characterised by the fact that the inhibitory composition is deposited by a printing technique.
  11. Combination according to claim 10, characterised by the fact that the inhibitory composition is deposited by wet offset printing.
  12. Method of authentication using the combination of a document and a composition according to one of claims 1 to 3, characterised by the fact that the felt of a marker device is impregnated with the aid of said composition, said document comprising if need be at least one desensitised zone such as defined according to one of claims 4 to 11 and that an inscription is transferred to the document with the aid of said device, this inscription becoming coloured due to the reaction between the compound participating in the authentication and the co-reagent, with the exception of the desensitised zone(s).
EP19910400224 1990-01-31 1991-01-30 Combination of a document authenticable and of an authentication composition and process of authentication using such a combination. Expired - Lifetime EP0440554B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9001125A FR2657630B1 (en) 1990-01-31 1990-01-31 AUTHENTICATING DOCUMENT BY AN AUTHENTICATING COMPOSITION, AUTHENTICATING COMPOSITION AND METHOD FOR PERFORMING SUCH AUTHENTICATION.
FR9001125 1990-01-31
FR9006617A FR2662717B2 (en) 1990-01-31 1990-05-29 DOCUMENT AUTHENTIFIABLE BY A COMPOSITION WITH DESENSITIZED ZONE AND AUTHENTICATION METHOD.
FR9006617 1990-05-29

Publications (2)

Publication Number Publication Date
EP0440554A1 EP0440554A1 (en) 1991-08-07
EP0440554B1 true EP0440554B1 (en) 1997-09-03

Family

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Application Number Title Priority Date Filing Date
EP19910400224 Expired - Lifetime EP0440554B1 (en) 1990-01-31 1991-01-30 Combination of a document authenticable and of an authentication composition and process of authentication using such a combination.

Country Status (3)

Country Link
EP (1) EP0440554B1 (en)
DE (1) DE69127481D1 (en)
FR (1) FR2662717B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU6697198A (en) * 1997-03-14 1998-10-12 Georgia-Pacific Corporation Security paper
GB9824246D0 (en) * 1998-11-06 1998-12-30 Kelsill Limited Electronic circuit
FR2791922B1 (en) * 1999-04-08 2001-06-22 Axytrans METHOD OF MARKING VALUABLE DOCUMENTS
FR2940329B1 (en) * 2008-12-23 2011-03-18 Arjowiggins ASSEMBLY COMPRISING AN AUTHENTICATION ARTICLE AND AUTHENTICATION COMPOSITION, AND ASSOCIATED METHODS.
FR3035819B1 (en) * 2015-05-07 2021-04-30 Honnorat Rech & Services SMARTPHONE AUTHENTICABLE PAPER

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1507454A (en) * 1975-06-19 1978-04-12 Wiggins Teape Ltd Security paper
DE2527462A1 (en) * 1975-06-20 1976-12-30 Pelikan Werke Wagner Guenther PRE-PRINTS SECURED AGAINST FALSE
CH628288A5 (en) * 1978-01-25 1982-02-26 Sicpa Holding Sa PROCESS FOR DESENSITIZING AN ACCEPTING SURFACE OF A CHEMICAL SELF-COPYING ASSEMBLY.
DE3211102A1 (en) * 1982-03-25 1983-10-06 Schwarz Klaus Billett Automat METHOD FOR AUTHENTICITY CONTROL OF PAPER SECTIONS AND USE OF A COLOR REACTION SYSTEM SUITABLE FOR THIS

Also Published As

Publication number Publication date
DE69127481D1 (en) 1997-10-09
FR2662717B2 (en) 1994-09-23
FR2662717A2 (en) 1991-12-06
EP0440554A1 (en) 1991-08-07

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