C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
C09B 67/08 (2006.01) B41M 3/14 (2006.01) B42D 15/10 (2006.01) C09B 67/22 (2006.01) C09D 11/00 (2006.01)
Patent
CA 2195934
The invention provides a pigment composition comprising a pigment having adsorbed on its surface, or as a physical mixture, up to 10% by weight, based on the total weight of pigment composition of a coding compound which is a compound containing an azo, azomethine or polycyclic chromophore and which has an absorption spectrum and a Raman spectrum different from that of the pigment. The compositions are suitable for use in printing inks for security applications.
Fraser Iain Frank
Macpherson Ian Alexander
Munro Callum Hugh
Smith William Ewen
White Peter Cyril
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
University Of Strathclyde
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