Patent ID: 6958209

Claim:
A photothermographic material comprising a support and having thereon an image forming layer containing an organic silver salt, light-sensitive silver halide grains, binder and a reducing agent, wherein the reducing agent comprises: a reducing agent A represented by following Formula (A-1); and a reducing agent B represented by a bisphenol derivative, selected from a group consisting of bisphenol derivatives represented by following Formula (A-2) and (A-3) and the amount of reducing agent A is 5 to 45 weight % of the total weight of the reducing agent A and reducing agent B, wherein each of R 1 is an alkyl group having 1 to 20 carbon atoms, and at least one of R 1 is a secondary or tertiary alkyl group; each of R 2 is a hydrogen atom or a group capable of being substituted on a benzene ring; Q 0 is a group capable of being substituted on a benzene ring; n and m are each an integer of 0 to 2; plural R 1 s, R 2 s or Q 0 s may be the same or different from each other; and X is a chalcogen atom or CHR, in which R is a hydrogen atom, a halogen atom or an alkyl group wherein Z is an atom group necessary to form a 3 to 10-membered non-aromatic ring together with a carbon atom; R x is a hydrogen atom or an alkyl group; R 3 and R 4 are a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; Q 0 is a group capable of being substituted on a benzene ring; n and m are each an integer of 0 to 2; and plural R 3 s, R 4 s or Q 0 s may be the same or different from each other, wherein Q 1 is a halogen atom, an alkyl group, an aryl group or a heterocyclic group; Q 2 is a hydrogen atom, a halogen atom, an alkyl group, an aryl group or a heterocyclic group; G is a nitrogen atom or a carbon atom; ng is 0 when G is a nitrogen atom; ng is 0 or 1 when G is a carbon atom; Z 2 is an atom group necessary to form a 3- to 10-membered non-aromatic ring together with a carbon atom; R x is a hydrogen atom or an alkyl group; R 3 and R 4 are a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; Q 0 is a group capable of being substituted on a benzene ring; n and m are each an integer of 0 to 2; and plural R 3 s, R 4 s or Q 0 s may be the same or different from each other.