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INFRARED SENSITIVE PIGMENT BASED INK JET INKS

IP.com Disclosure Number: IPCOM000027474D
Original Publication Date: 1997-Apr-30
Included in the Prior Art Database: 2004-Apr-08

Publishing Venue

Xerox Disclosure Journal

Abstract

Infrared (IR) sensitive pigment based ink jet ink compositions that are useful in document authentication and security applications are disclosed. IR sensitive pigments include numerous members of the phthalocyanine family, for example, titanium phthalocyanine. A IR sensitive ink jet ink composition may be formulated by adding an IR sensitive pigment and a suitable dispersant to an aqueous solution. The resulting pigment dispersion is further ground to submicron sized particles by conventional means. Additional performance additives may then be added, for example, wetting agents, stabilizers, corrosion inhibitors, and the like to complete the formula. An example formulation follows: