Direct-positive silver halide photographic light-sensitive mater

Details Direct-positive silver halide photographic light-sensitive mater Direct-positive silver halide photographic light-sensitive mater

1988-12-21

1990-07-24

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Color imaging process

Using identified radiation sensitive composition in the...

430505, 430506, 430547, 430558, 430567, G03C 738, G03C 730

Patent

active

049435183

ABSTRACT:
A direct positive type silver halide color photographic material and an image forming method are disclosed. A green sensitive emulsion layer of the photographic material comprises silver halide grains having at least two peaks on the size distribution curve thereof and the grain size corresponding to the smallest grain size peak among the peaks is not more than 0.3 .mu.m and a magenta coupler represented by the following Formula (M-I); ##STR1## wherein Z is a group of non-metal atoms necessary to complete a nitrogen-containing heterocyclic ring; X is a hydrogen atom or a split-off group and R is a substituent. The photographic material is developed with a color development in the presence of a fogging agent to directly form the positive image after imagewise exposure to light. Thus obtained image is improved in a increased maximum density, lowered minimum density and wider exposure latitude. Stability of gradation with respect to variation of development conditions is also improved.

REFERENCES:
patent: 4444865 (1984-04-01), Silverman et al.
patent: 4749644 (1988-06-01), Tosaka et al.
patent: 4801520 (1989-01-01), Inoue et al.
patent: 4830956 (1989-05-01), Waki
Patent Abstracts of Japan, vol. 11, No. 233 (P-600) [2680], 7/30/87, JPA 62-44731.

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