Radiation imagery chemistry: process – composition – or product th – Post imaging processing – Positive
Patent
1987-06-23
1988-12-06
Michl, Paul R.
Radiation imagery chemistry: process, composition, or product th
Post imaging processing
Positive
430409, 430410, 430445, 430547, 430607, 430611, G03C 524
Patent
active
047896272
ABSTRACT:
In a method for forming a direct positive color image which comprises image-wise exposing to light a light-sensitive material comprising a support having provided thereon at least one photographic emulsion layer contaiing unfogged internal latent image type silver halide grains and a color image-forming coupler; developing the light-sensitive material with a surface developing solution containing an aromatic primary amine type color developing agent in the presence of a nucleating agent and/or fogging exposure; bleaching and fixing the resulting material to form the direct positive color image, the improvement is characterized in that the developing solution has a pH of 11.5 or less and does not substantially contain benzyl alcohol; the color coupler is a compound which forms or releases a substantially non-diffusive dye by oxidation coupling with a developing agent, and the internal latent image type silver halide grains have a particular core/shell structure.
According to the method, a direct positive color image having a high maximum color density and a low minimum image density can be obtained in a short time.
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Heki Tatsuo
Inoue Noriyuki
Ueda Shinji
Doody Patrick A.
Fuji Photo Film Co. , Ltd.
Michl Paul R.
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