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

1981-11-17

1983-02-22

Louie, Jr., Won H.

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Positive

430548, 430547, 430559, 430542, 430562, 430217, 430223, G03C 136

Patent

active

043749232

ABSTRACT:
A direct positive silver halide photographic light-sensitive material is described comprising a support having coated thereon at least one light-sensitive silver halide photographic emulsion layer, wherein at least one layer of the light-sensitive silver halide photographic emulsion layers and other hydrophilic colloid layers contains a compound represented by formula (I) ##STR1## wherein R.sup.1 and R.sup.2 can each represent a hydrogen atom, an aliphatic group, an aromatic group, or a heterocyclic group; R.sup.3 represents a hydrogen atom or an aliphatic group; R.sup.4 represents a hydrogen atom, an aliphatic group, or an aromatic group; and X represents a divalent aromatic group.
The direct positive silver halide photographic light-sensitive material containing the above novel fogging agent compound has good preservability and provides excellent reversal photographic images in spite of changes (1) in the bromine ion concentration in a developing solution used for processing, (2) in the particle size of the internal latent image type silver halide grains, and (3) in the amount of the fogging agent employed.

REFERENCES:
patent: 3227552 (1966-01-01), Whitmore
patent: 4030925 (1977-06-01), Leone et al.
patent: 4323643 (1982-04-01), Mifune et al.

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