Direct positive silver halide photographic materials

Details Direct positive silver halide photographic materials Direct positive silver halide photographic materials

1985-02-20

1986-09-09

Louie, Won H.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430505, 430547, 430955, 430940, 430217, 430218, 430410, G03C 524

Patent

active

046109595

ABSTRACT:
A direct positive silver halide photographic material is described, comprising a support having thereon at least an internal latent image-type direct positive silver halide emulsion layer containing a hydrazine series nucleating agent, wherein said silver halide emulsion layer or a layer adjacent to the silver halide emulsion layer contains a non-dye image-forming compound represented by following general formula (I) in an amount sufficient for accelerating nucleation; ##STR1## wherein Z.sub.1 and Z.sub.2, which may be the same or different, each represents an atomic group necessary for forming a benzene ring or a naphthalene ring; G.sub.1 and G.sub.2, which may be the same or different, each represents hydrogen or a substituent which does not adversely influence the image; A.sub.1, A.sub.2 and A.sub.3, which may be the same or different, each represents hydrogen or a substituent which does not adversely influence the image; B.sub.1, B.sub.2 and B.sub.3, which may be the same or different, each represents hydrogen or a substituent which does not adversely influence the image, L.sub.1 and L.sub.2, which may be the same or different, each represents a linkage group; m and n represent 0 or 1; and Y.sub.1 and Y.sub.2, which may be the same or different, each represents a hydrogen atom or a component having a function of releasing an azo compound from general formula (I) as the result of development.

REFERENCES:
patent: 4341858 (1982-07-01), Chaffee et al.
patent: 4431730 (1984-02-01), Urabe et al.
patent: 4478928 (1984-10-01), Hess et al.
Research Disclosure 23510, Nov. 1983.
Research Disclosure 15162, Nov. 1976.

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