Patent ID: 7229751
Filing Date: 2007-06-12
Classification: G03C

Abstract:
1. A photothermographic imaging material comprising a support having thereon an image forming layer containing light-insensitive organic silver salt grains, photosensitive silver halide grains, a reducing agent for silver ions and a binder, wherein: (i) each of the photosensitive silver halide grains produces a larger number of latent images in a surface portion of the grain than in an inner portion of the grain by exposure to light; (ii) each of the photosensitive silver halide grains produces a larger number of latent images in the inner portion of the grain than in the surface portion of the grain after being subjected to a thermal development; (iii) a surface photographic speed of each of the photosensitive silver halide grains decreases after being subjected to the thermal development, the surface photographic speed of the photosensitive silver halide grains after being subjected to the thermal development is not more than 1/10 of the surface photographic speed of the photosensitive silver halide grains prior to thermal development; and (iv) the photothermographic imaging material contains a reducible silver salt compound represented by General Formula (I): wherein L