Patent ID: 7108743

Claim:
A coloring composition for image formation comprising an azo dye having an aromatic nitrogen-containing 6-membered heterocyclic ring as a coupling component, wherein the azo dye is represented by formula (2): wherein Z 1 represents an electron-attracting group having a Hammett's substituent constant σp value of 0.20 or greater; Z 2 represents a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group; R 5 and R 6 each independently represent a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, an alkylsulfonyl group, an arylsulfonyl group of a sulfamoyl group, provided that R 5 and R 6 do not represent a hydrogen atom simultaneously, wherein each group may have a substituent; and R 1 and R 2 each independently represent a hydrogen atom, a halogen atom, an aliphatic group, an aromatic group, a heterocyclic group, a cyano group, a carboxyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyl group, a hydroxyl group, an alkoxy group, an aryloxy group, a silyloxy group, an acyloxy group, a carbamoyloxy group, a heterocyclic oxy group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an amino group substituted with an alkyl group, an aryl group or a heterocyclic group, an acylamino group, a ureido group, a sulfamoylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, a nitro group, an alkylthio group, an arylthio group, an alkylsulfonyl group, an arylsulfonyl group, an alkylsulfinyl group, an arylsulfinyl group, a sulfamoyl group, a sulfo group or a heterocyclic thio group, wherein each group may have a substituent; or R 5 may be connected to R 1 or R 6 to form a 5- or 6-membered ring; R 3 and R 4 each independently represent a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, a sulfonyl group or a sulfamoyl group; and Q represents a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group; wherein each group as represented by Z 1 , Z 2 , R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and Q may have a substituent.