Patent ID: 7144695
Filing Date: 2006-12-05
Classification: G03C,Y10S

Abstract:
1. A method of forming a photothermographic material comprising: providing a photosensitive silver halide; separately providing a non-photosensitive organic silver salt, the non-photosensitive organic silver salt being prepared from a reaction between an aqueous silver salt and an organic acid or an alkali metal salt thereof; forming an aqueous dispersion of the non-photosensitive organic silver salt; annealing the aqueous dispersion of the non-photosensitive organic silver salt by storing the aqueous dispersion of the non-photosensitive organic silver salt at a temperature between 30° C. and 90° C. for a length of time sufficient to improve the fogging property of a photothermographic material obtained comprising the non-photosensitive organic silver salt; forming an emulsion comprising the photosensitive silver halide and the annealed aqueous dispersion of the non-photosensitive organic silver salt; forming a water-base coating photothermographic material coating layer comprising the photosensitive silver halide, the annealed aqueous dispersion of the non-photosensitive organic silver salt, a reducing agent, and a binder; and coating a support with the photothermographic material coating layer comprising the photosensitive silver halide, the annealed aqueous dispersion of the non-photosensitive organic silver salt, the reducing agent, and the binder.