Patent ID: 7175978
Filing Date: 2007-02-13
Classification: G03C

Abstract:
1. A photothermographic imaging material packed in a packaging material, the imaging material comprising a support having thereon light-insensitive organic silver salt grains, photosensitive silver halide grains, a reducing agent for silver ions and a binder, wherein the packaging material has a water permeability of not more than 5.0 g/m the first photographic speed being derived from a first characteristic curve obtaines from the imaging material subjected to a first image forming method comprising the following steps in the order named: (1a) exposing the imaging material to light using an optical wedge under a predetermined condition; and (1b) applying heat to the exposed imaging material under a predetermined condition so as to develop the exposed imaging material, and the second photographic speed being derived from a second characteristic curve obtained from the imaging material subjected to a second image forming method comprising the following steps in the order named: (2a) applying heat to the imaging material under the same predetermined condition as (1b); (2b) exposing the heated imaging material to light using the optical wedge under the same predetermined condition as (1a); and (2c) applying heat to the exposed imaging material under the same predetermined condition as (1b) so as to develop the exposed imaging material.