Patent ID: 7202018

Claim:
A silver salt photothermographic material comprising on a support a light-sensitive layer comprising a light-sensitive emulsion containing light-insensitive organic silver salt grains of behenic acid and light-sensitive silver halide grains, a reducing agent for silver ions and a binder, wherein the reducing agent for silver ions is a compound represented by the following formula (1) and the light-sensitive layer further comprises a hindered phenol which is a compound represented by the following formula (3), and wherein a molar ratio of the compound represented by formula (3) to the compound represented by formula (1) is 0.001 to 0.2: wherein R 11 and R 12 are each a hydrogen atom, a 3- to 10-membered non-aromatic ring group or a 5- or 6-membered aromatic ring group, provided that R 11 and R 12 are not hydrogen atoms at the same time; R 13 and R 14 are each a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an aryl group or a heterocyclic group; Q is a group capable of being substituted on a benzene ring; n is 0, 1 or 2; wherein R 31 , R 32 , R 33 and R 34 are each an alkyl or cycloalkyl group; L is —S—or —CHR 35 , in which R 35 is a hydrogen atom or an alkyl or cycloalkyl group.