PRINTING DYE COMPOSITE INCLUDING FIRST AND SECOND OPTICALLY CHANGEABLE PIGMENTS Russian patent published in 2003 - IPC

Abstract RU 2220174 C2

FIELD: polymers, dyes. SUBSTANCE: invention relates to composite of printing dye used for protection documents against copying. Describing composite of printing dye involves polymeric binding agent and scales of two optically changeable pigments exhibiting color shift depending on the observation angle in the mass ratio of the first and the second optically changeable dichroic pigment from 1:10 to 10:1. Proposed dye shows improved stability against chemical effect. EFFECT: improved and valuable properties of printing dye composite. 13 cl, 8 dwg, 8 tbl, 1 ex

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RU 2 220 174 C2

Authors

Blajkol'M Anton

Rozumek Oliver

Mjuller Ehdgar

Dates

2003-12-27Published

1999-10-08Filed