Radiation imagery chemistry: process – composition – or product th – Thermographic process – Heat applied after imaging
Patent
1982-12-03
1984-01-17
Brown, J. Travis
Radiation imagery chemistry: process, composition, or product th
Thermographic process
Heat applied after imaging
430364, 430376, 430377, 430467, 430470, 430471, 430472, 430484, 430543, 430553, 430566, 430619, 430620, 428913, G03C 524, G03C 140
Patent
active
044264410
ABSTRACT:
In a dye-forming imaging material comprising (a) a dye-forming coupler, and (b) an organic reducing agent that is capable in its oxidized form of reacting with the dye-forming coupler to form a dye, improvements are provided by a reducing agent that is a ureidoaniline silver halide developing agent free of strong electron withdrawing groups. Such an imaging material can be a photographic silver halide material. The imaging material can be a photothermographic material for producing a dye image comprising, in reactive association, (a) photographic silver halide, (b) a dye-forming coupler, and (c) an oxidation-reduction image forming combination comprising (1) an organic silver salt oxidizing agent, and (2) an organic reducing agent for the organic silver salt oxidizing agent, wherein the reducing agent is a ureidoaniline which is capable in its oxidized form of reacting with the dye-forming coupler to form a dye. A thermographic material comprises the same combination of components without the need for photographic silver halide. A silver image and dye image are produced in such an exposed photothermographic material by heating the material until the silver image and dye image are produced. An image in a thermographic material is produced by imagewise heating the material. Ureidoaniline silver halide developing agents are also useful in processing compositions for photographic silver halide materials.
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Adin Anthony
DeSelms Roy C.
Brown J. Travis
Eastman Kodak Company
Knapp Richard E.
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