Photothermographic element with iridium and copper doped silver halide grains
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United States of America Patent
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Aug 17, 1999
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app pub date -
Jun 24, 1997
filing date -
Jun 24, 1997
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Abstract
A negative-acting photothermographic element comprises a support bearing at least one heat-developable, photosensitive, image-forming photothermographic emulsion layer that contains photosensitive silver halide grains doped with iridium and copper; a non-photosensitive, reducible source of silver; a reducing agent for the non-photosensitive, reducible source of silver; and a binder. A process of forming photothermographic emulsions from doped silver halide grains by forming silver soaps in the presence of those grains is also described.
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