Direct positive photographic material

Details Direct positive photographic material Direct positive photographic material

1991-01-18

1992-12-01

Stoll, Robert L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430264, 430596, 430378, 430547, 430406, 430607, 430613, 430600, G03C 1485

Patent

active

H00011193

ABSTRACT:
Disclosed is a direct positive photographic material having an improved time-dependent storage stability. The material comprises a support having thereon at least one photographic emulsion layer containing previously non-fogged internal latent image type silver halide grains wherein the photographic emulsion layer contains at least one compound of formula (I): ##STR1## where R.sup.11 is an aryl group, R.sup.12 to R.sup.15 each are a hydrogen atom, or an aliphatic or aromatic group, and R.sup.11 to F.sup.15 may have substituent(s) and may form ring(s).

REFERENCES:
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patent: 4409324 (1982-09-01), Ishikawa et al.
patent: 4456682 (1982-09-01), Ishikawa et al.
patent: 4465762 (1982-03-01), Ishikawa et al.
patent: 4981780 (1991-01-01), Inoue et al.
patent: 4996937 (1991-02-01), Inoue et al.
patent: 5030553 (1991-07-01), Kawashima et al.
patent: 5037726 (1991-08-01), Kojiura et al.

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