G - Physics – 06 – K
Patent
G - Physics
06
K
G06K 19/00 (2006.01) B41M 3/14 (2006.01) G07D 7/00 (2006.01)
Patent
CA 2624515
The invention relates to a characteristic substance for securing the authenticity of value documents. Said characteristic substance comprises at least one luminescent substance in the form of particles as well as nanoparticles which at least partly surround the surfaces of the luminescent substance particles, the properties of the characteristic substance resulting from the interaction of the properties of the luminescent substance and the nanoparticles. The invention further relates to a method for producing said characteristic substance, a method for securing the authenticity of a security element or value document with the aid of the characteristic substance, and security elements and value documents encompassing authenticity features based on the characteristic substance.
L'invention concerne une substance caractéristique utilisée en guise de signe distinctif d'authenticité de documents de valeur. Cette substance contient au moins une substance luminescente sous forme de particules et des nanoparticules qui enrobent au moins partiellement la surface des particules de la substance luminescente. Les propriétés de la substance caractéristique sont obtenues par la synergie entre les propriétés de la substance luminescente et les nanoparticules. L'invention concerne également un procédé de production de la substance luminescente, un procédé de protection d'un élément de sécurité ou d'un document de valeur contre la falsification à l'aide de la substance luminescente, ainsi que des éléments de sécurité et documents de valeur ayant des caractéristiques d'authenticité sur la base de la substance caractéristique.
Grauvogl Gregor
Scholz Ulrich
Giesecke & Devrient Gmbh
Ridout & Maybee Llp
LandOfFree
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