Patent ID: 6902876
Filing Date: 2005-06-07
Classification: G03C

Abstract:
1. A concentrated color developer composition comprising: a color developing agent, a sulfite, a compound represented by formula (1), a compound represented by formula (2) or (3), and a compound represented by formula (4), and the color developing agent has a concentration of 0.02 to 0.2 mol/l, the sulfite has a concentration meeting the following requirement: 0.1<sulfite concentration (mol/l)/color developing agent concentration (mol/l)<10, wherein X is an alkylene group, which may be substituted; A is a carboxyl group, sulfo group, phosphono group, hydroxy group, alkoxy group, amino group, ammonio group, sulfamoyl group or sulfamoyl group, wherein X and A are the same as defined in formula (1); Y is a hydroxy group, a halogen atom, an alkoxy group, a sulfo group or a sulfonate group, a sulfuric ester group or sulfate ester, or a sulfonyl halide; R is an alkylene group having 1 to 5 carbon atoms; M is Li, Na, K or NH wherein R is —CH