C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 11/00 (2006.01) B41M 3/14 (2006.01) G07D 7/12 (2006.01)
Patent
CA 2499820
The invention discloses a method for marking and authenticating a security article, such as a banknote, a document, a ticket, a foil, a thread, a label, a card, or a commercial good, so as to provide for an easy authentication of said article by a machine, such as a currency acceptor, a ticket validator, or a hand-held authentication device. According to the disclosed method, the security article carries a marking in the form of a user-defined design, wherein said marking comprises dyes or pigments belonging to an extended, or hyperchromic color space which is not reproducible by commercially available, 4-color desktop reproduction equipment. The authentication of said marking includes the mathematical transformation of the crude spectral information to statistically independent hyper-color coordinates, and the comparison of selected hyper-color coordinates with corresponding reference values.
L'invention concerne un procédé de marquage et d'authentification d'articles de sécurité, tels que billet de banque, document, ticket, film, filet, étiquette, carte ou produit commercial, permettant de faciliter son authentification au moyen d'une machine telle que accepteur de papier-monnaie, dispositif de validation de ticket, ou dispositif d'authentification portable. Selon le procédé, l'article de sécurité porte un marquage sous la forme d'un dessin défini par l'utilisateur, ledit marquage comprenant des colorants ou des pigments appartenant à un espace couleur étendu ou hyperchrome qui ne peut être reproduit au moyen des équipements de reproduction de bureau courants dans le commerce. L'authentification dudit marquage comporte notamment la transformation mathématique de l'information spectrale brute en coordonnées d'hyper-couleurs statistiquement indépendantes, et la comparaison de coordonnées d'hyper-couleurs choisies avec des valeurs de référence correspondantes.
Degott Pierre
Despland Claude-Alain
Mueller Edgar
Mcfadden Fincham
Sicpa Holding S.a.
Sicpa Holding Sa
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