| abstract |
(57) [Problem] To provide a photothermographic material excellent in film strength and stability over time and excellent in high contrast even when stored for a long period of time. SOLUTION: A compound having an organic silver salt, photosensitive silver halide grains and a reducing agent on a support, having at least two cyclic acid anhydride groups, and having at least two acetal groups, A photothermographic material formed by adding a carbodiimide compound and at least one acid anhydride or a compound having two or more 2-substituted acrylate groups. |