Photographic material with two size population of silver halide

Details Photographic material with two size population of silver halide Photographic material with two size population of silver halide

1986-06-18

1988-06-07

Shah, Mukund J.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430505, 430547, 430552, 430553, 430554, 430555, 430556, 430557, 430558, 430567, 430598, 430940, 430957, G03C 732, G03C 102, G03C 108, G03C 726

Patent

active

047496444

ABSTRACT:
In a light-sensitive direct posi silver halide color photographic material having photographic constituent layers comprising at least one silver halide emulsion layer containing latent image type silver halide grains not previously fogged, which is capable of giving a direct posi image by subjecting the whole surface to exposure or effecting surface development in the presence of a fogging agent, after image exposure, the improvement wherein said internal latent image type silver halide grains are composed of at least two groups of internal latent image type silver halide grains having average grain sizes different from each other, and at least one compound capable of releasing a development inhibiting substance or its precursor through the reaction with the oxidized product of a color developing agent is contained in at least one layer of said photographic constituent layers.
According to the present invention, there can be obtained a direct posi color photographic material improved in processing stability, having smooth gradation and excellent image quality, in which the respective photographic performances of at least two groups of internal latent type silver halide grains having grains sizes different from each other are fully utilized.

REFERENCES:
patent: 3600180 (1971-08-01), Judd et al.
patent: 3761276 (1973-09-01), Evans
patent: 4431728 (1984-02-01), Abe et al.
patent: 4433050 (1984-02-01), Abe et al.
patent: 4440851 (1984-04-01), Tosaka et al.
patent: 4444865 (1984-04-01), Silverman et al.
patent: 4444874 (1984-04-01), Silverman et al.
patent: 4643965 (1987-02-01), Kubota et al.

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