MANUFACTURE OF A PROTECTIVE ELEMENT AND VERIFICATION OF AN OBJECT PROVIDED WITH SAME

The invention relates to the field of counterfeit protection and verification of the authenticity of objects. The manufacture of a transparent protective element includes the provision of a carrier which is transparent in the visible spectrum. A barrier layer which is transparent in the visible spec...

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Bibliographische Detailangaben
1. Verfasser:	KARASEV, ANDREI LVOVICH
Format:	Patent
Sprache:	eng ; fre ; rus
Schlagworte:	BOOK COVERS BOOKBINDING CALCULATING CHECKING-DEVICES COMPUTING COUNTING DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR FILES HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING HANDLING RECORD CARRIERS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM LOOSE LEAVES MOVABLE-STRIP WRITING OR READING APPARATUS PERFORMING OPERATIONS PHYSICS PRESENTATION OF DATA PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR RECOGNITION OF DATA RECORD CARRIERS SPECIAL PRINTED MATTER TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention relates to the field of counterfeit protection and verification of the authenticity of objects. The manufacture of a transparent protective element includes the provision of a carrier which is transparent in the visible spectrum. A barrier layer which is transparent in the visible spectrum is formed on each side of the carrier using a liquid composition based on an organic solvent and a polymer varnish and containing a UV absorber. The barrier layer is cured at a temperature of 70-80°C and a hidden image is printed onto each side of the carrier by direct printing using a colorless liquid composition based on an organic solvent and a polymer varnish and containing a photosensitive dye and a UV absorber. The hidden images are cured at a temperature of 70-80°C and a protective layer which is transparent in the UV spectrum is applied to both sides of the carrier. The refractive indices of the protective layer, the barrier layer and the hidden images coincide, thus ensuring that the boundaries of the hidden images are invisible to the naked eye. L'invention concerne le domaine de la protection contre la contrefaçon et de la vérification de l'authenticité d'objets. Lors de la fabrication d'un élément de protection transparent on prévoit un support transparent dans le domaine visible du spectre. On forme une couche barrière transparente dans le domaine visible du spectre sur chaque côté du support au moyen d'une composition liquide à base d'un solvant organique et d'un vernis à base de polymère et contenant un absorbeur de rayons UV. La couche barrière est durcie à une température de 70 à 80 °C, et une image cachée est imprimée sur chaque côté du support par impression directe au moyen d'une composition liquide incolore à base d'un solvant organique et d'un vernis à base de polymère et contenant un colorant photosensible et un absorbeur d'UV. On durcit les images cachées à une température de 70 à 80 °C, et on applique une couche de protection transparente dans le spectre UV des deux côtés du support. Les indices de réfraction de la couche de protection, de la couche barrière et des images cachées coïncident, ce qui permet l'invisibilité des contours des images cachées à l'oeil nu.