Direct positive silver halide photographic materials

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

1990-03-28

1992-05-12

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430597, 430598, 430378, 430410, 430547, 430569, 430604, G03C 1485

Patent

active

051127326

ABSTRACT:
A direct positive silver halide photographic material is disclosed, comprising a support having thereon at least one internal latent image silver halide emulsion layer which has not been prefogged and another hydrophilic colloid layer wherein the grains in the internal latent image silver halide emulsion is formed in the presence of an iron complex compound. The direct positive silver halide photographic material is developed and then direct positive images may be obtained with this material, which feature a high D.sub.max and a low D.sub.min. The disclosed material has a broad range of applications, including as a COM film.

REFERENCES:
patent: 3672901 (1972-06-01), Ohkubo et al.
patent: 4395478 (1983-07-01), Hoyen
patent: 4806462 (1989-02-01), Yamashita et al.
patent: 4857450 (1989-08-01), Burrows et al.
patent: 4933265 (1990-06-01), Inoue et al.
patent: 4933272 (1990-06-01), McDugle et al.
patent: 4981780 (1991-01-01), Inoue et al.

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