C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 11/00 (2006.01) B41M 3/14 (2006.01) C09D 11/02 (2006.01) G06K 19/00 (2006.01)
Patent
CA 2463787
The invention relates to an ink set comprising a plurality of inks of a first and of a second group, having different colors. Inks of said first group comprise a visible colorant and an additional IR-absorbing compound (IR- taggant) which has an absorption peak at a predetermined wavelength in the near infrared. Inks of said second group comprise a visible colorant which has at the same time an infrared absorption peak at the same wavelength as that of the IR-taggant used in the inks of the first group. Preferred embodiment is a four-color process ink set comprising an IR feature.
L'invention se rapporte à un jeu d'encres comprenant une pluralité d'encres d'un premier et d'un second groupes, possédant des couleurs différentes. Les encres dudit premier groupe contiennent un colorant visible, ainsi qu'un composé absorbant le rayonnement infrarouge (IR) (traceur IR), dont le pic d'absorption se trouve à une longueur d'onde prédéterminée dans le proche infrarouge. Les encres dudit second groupe contiennent un colorant visible présentant un pic d'absorption infrarouge se trouvant à la même longueur d'onde que celle du traceur IR utilisé dans les encres du premier groupe. Le mode de réalisation préféré de l'invention comprend un jeu d'encres quadrichromie possédant un attribut IR.
Bleikolm Anton
Degott Pierre
Despland Claude-Alain
Mueller Edgar
Mcfadden Fincham
Sicpa Holding S.a.
Sicpa Holding Sa
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