Process of preparing a photothermographic composition of enhanced photosensitivity
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United States of America Patent
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Jan 12, 1999
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N/A
app pub date -
Jun 27, 1997
filing date -
Jun 27, 1997
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Expired
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Abstract
A process of preparing a photothermographic composition of enhanced photosensitivity is disclosed comprised of (a) precipitating light-sensitive silver halide grains in the presence of a non-aqueous polymeric peptizer and (b) then combining the silver halide grains with an oxidation-reduction image-forming combination comprised of an organic silver compound and a reducing agent for the silver organic compound. Light-sensitivity of the silver halide grains is enhanced by, prior to step (b), sensitizing the silver halide grains with a gold sensitizer dissolved in an aqueous medium.
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