Patent ID: 6316179
Filing Date: 2001-11-13
Classification: G03C,Y10S

Abstract:
An infrared sensitized photothermographic silver halide element comprising a support layer having on at least one surface thereof a photothermographic composition comprising a binder, a light insensitive silver source, a reducing agent for silver ion, a heteroaromatic mercapto compound or heteroaromatic disulfide compound as a supersensitizer, and infrared radiation sensitive preformed silver halide grains having number average particle size of from 0.01 to 0.08 microns with at least 80% of all grains with .+-.0.05 microns of the average, in combination with an antihalation layer having an absorbance ratio of IR absorbance (before exposure)/visible absorbance (after processing) >30, and an IR absorbance of at least 0.3 within the range of 750-1400 nm and an optical density of less than 0.03 in the visible region, wherein said grains comprise crystal habits selected from the group consisting of cubic, orthorhombic, octagonal, tetragonal, rhombic, dodecahedral, trisoctahedral, icositetrahedral, tetrahexahedral, and tetrahedral.