Patent ID: 7303865

Claim:
A photothermographic material comprising, on at least one side of a support, an image forming layer comprising at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent, and a binder, and a non-photosensitive layer, wherein the photothermographic material contains a metal phthalocyanine dye represented by formula (I): wherein, M represents a metal atom; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 each independently represent a hydrogen atom or a substituent, with at least one of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 being a substituent; X 1 , X 2 , X 3 , and X 4 each independently represent a hydrogen atom or a substituent; and at least one of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , X 1 , X 2 , X 3 , and X 4 is an oil-soluble group; wherein at least one of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , X 1 , X 2 , X 3 , and X 4 is an oil-soluble electron-attracting group; wherein the oil-soluble electron-attracting group is a group represented by the following formula (II): —L 1 —R 17 Formula (II) wherein L 1 represents a group selected from **—SO 2 —*, **—SO 3 —*, **—SO 2 NR N —*, **—SO—*, **—CO—*, **—CONR N —*, **—COO—*, **—COCO—*, **—COCO 2 —*, and **—COCONR N —*; ** denotes a bond with a phthalocyanine skeleton at this position, and * denotes a bond with R 17 at this position; R N represents one selected from a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, an alkoxycarbonyl group, a carbamoyl group, a sulfonyl group, or a sulfamoyl group; and R 17 represents an oil-soluble group; and wherein the metal phthalocyanine dye does not have a dissociation group.