Patent ID: 6331375
Filing Date: 2001-12-18
Classification: B41C,G03F,Y10S

Abstract:
An infrared light absorbing agent represented by following general formula (1): ##STR44##wherein A.sup.1 and A.sup.2 each independently represents a hydrophobic functional group which changes to hydrophilic due to heat; Ar.sup.1 and Ar.sup.2 each independently represents an aryl group; B.sup.1, B.sup.2, B.sup.3, B.sup.4, C.sup.1, C.sup.2, C.sup.3 each independently represents hydrogen, a halogen, an alkyl group, an aryl group, an alkenyl group or an alkynyl group, and any two of B.sup.1, B.sup.2, B.sup.3, B.sup.4, C.sup.1, C.sup.2, C.sup.3 may form a ring; D.sup.1 and D.sup.2 each independently represents an alkyl group, an aryl group, an alkenyl group, or an alkynyl group; X.sup.- represents a counter anion; and Y.sup.1, Y.sup.2, Z.sup.1, Z.sup.2 each independently represent a divalent binding group formed from nonmental atoms.