Photothermographic material and image forming method

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 R1 is an alkyl group having 1 to 20 carbon atoms, and at least one of R1 is a secondary or tertiary alkyl group;
• each of R2 is a hydrogen atom or a group capable of being substituted on a benzene ring;
• Q0 is a group capable of being substituted on a benzene ring;
• n and m are each an integer of 0 to 2;
• plural R1s, R2s or Q0s 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;
• Rx is a hydrogen atom or an alkyl group;
• R3 and R4 are a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group;
• Q0 is a group capable of being substituted on a benzene ring;
• n and m are each an integer of 0 to 2;
• and plural R3s, R4s or Q0s may be the same or different from each other,
• wherein Q1 is a halogen atom, an alkyl group, an aryl group or a heterocyclic group;
• Q2 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;
• Z2 is an atom group necessary to form a 3- to 10-membered non-aromatic ring together with a carbon atom;
• Rx is a hydrogen atom or an alkyl group;
• R3 and R4 are a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group;
• Q0 is a group capable of being substituted on a benzene ring;
• n and m are each an integer of 0 to 2;
• and plural R3s, R4s or Q0s may be the same or different from each other.