Method of forming images

Claim 3

The method of forming color images according to claim 1, wherein the color developing agent is at least one compound of the compounds represented by the following general formulae (I) to (V): ##STR119## wherein, R 1 , R 2 , R 3 , and R 4 each represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkylcarbonamido group, an arylcarbonamido group, an alkylsulfonamido group, an arylsulfonamido group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an alkylcarbamoyl group, an arylcarbamoyl group, a carbamoyl group, an alkylsulfamoyl group, an arylsulfamoyl group, a sulfamoyl group, a cyano group, an alkylsulfonyl group, an arylsulfonyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylcarbonyl group, an arylcarbonyl group, or an acyloxy group; R 5 represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group; Z represents an atomic group forming an aromatic ring (including a heterocyclic aromatic ring) and when Z is a benzene ring, the total value of the Hammett's constant (σ) of the substituent is at least 1; R 6 represents a substituted or unsubstituted alkyl group; X represents an oxygen atom, a sulfur atom, a selenium atom, or an alkyl-substituted or aryl-substituted tertiary nitrogen atom; and R 7 and R 8 each represents a hydrogen atom or a substituent and R 7 and R 8 may combine each other to form a double bond or a ring.