Security document protection process

G - Physics – 06 – K

Patent

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283/20, 117/6

G06K 19/00 (2006.01) B41M 3/14 (2006.01)

Patent

CA 1279533

PRECIS DE LA DIVULGATION: L'invention a pour objet un procédé de protection notamment de documents de sécurité comprenant un support de papier ou de carton sur lequel sont portées des informa- tions, recouvert de couches de protections indéfoliables. Ce procédé est caractérisé en ce que l'on perfore à l'inté- rieur du support un ensemble de microtrous borgnes dans lesquels sont introduites des quantités infinitésimales de pigment coloré, solubles dans les solvants des couches de protection, Ce procédé est notamment utilisable pour la prévention des contrefaçons.

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