Patent ID: 6558896
Filing Date: 2003-05-06
Classification: G03C

Abstract:
A photothermographic material comprising on a support a light-insensitive organic silver salt, light-sensitive silver halide and a reducing agent, wherein when the photothermographic material having been exposed to light at an exposure so as to give an optical density of 3.0 and after having been thermally processed, the photothermographic material exhibits a variation of density from 3.0 being within the range of âˆ’0.2 to +0.2 after being kept at 50Â° C. and 50% RH for 120 hours; and wherein the photothermographic material further comprises a compound represented by formula (1); the reducing agent is represented by the formula (2) and contained in an amount of 35 to 100 mol %, based on the organic silver salt; and a molar ratio of said reducing agent represented by formula (2) to said compound represented by formula (1) being 10 to 50:X&boxH;C&boxH;Nâ€”Lâ€”(N&boxH;C&boxH;X)vâ€ƒâ€ƒformula (1) wherein v is 1 or 2; L is a bivalent linkage group having an alkylene group, an alkenylene group, arylene group or an alkylarylene group; and X is an oxygen atom or a sulfur atom; wherein R is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms; Râ€² and Râ€³ are each an alkyl group having 1 to 5 carbon atoms.