Infrared sensitized, photothermographic article
AssigneeEastman Kodak Company
InventorsSteven M. Shor, James B. Philip, Jr.
Life of this patent
Estimating the term…
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 and infrared radiation sensitive preformed silver halide grains having number average particle size of <0.10 micron 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 and an optical density of less than 0.03 in the visible region.
Claims13
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.
Dependencies are inferred from the claim text.