Photothermographic material

摘要

A photothermographic material comprising a defined amount of a compound represented by the following general formula as a reducing agent is disclosed. In the following general formula, R1 and R1' each independently represent an alkyl group, at least one of which is a secondary or tertiary alkyl group; R2 and R2' each independently represent hydrogen atom or a group that can be a substituent on benzene ring; L represents -S- group or a -CH(R3)- group where R3 represents hydrogen atom or an alkyl group; and X and X' each independently represent hydrogen atom or a group that can be a substituent on benzene ring. The photothermographic material is characterized by providing sufficient image density by heat development, and showing good silver color tone and little change with time after the development.