Silver halide photographic material

Details Silver halide photographic material Silver halide photographic material

1988-11-04

1990-04-03

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430214, 430551, 430583, 430600, 430603, G03C 106

Patent

active

049140027

ABSTRACT:
A silver halide negative photographic material comprising a support having thereon at least one silver halide emulsion layer, at least one hydrophilic colloidal layer thereof containing (1) a hydrazine derivative, (2) a compound substantially having no absorption maximum in the visible light region represented by formula (I): ##STR1## wherein Z.sup.11, Z.sup.12, R.sup.11, R.sup.12 X and n are as defined in the specification, and (3) at least one compound represented by formula (II) or (III): ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and Q are as defined in the specification; and ##STR3## wherein R.sub.21, R.sub.22, R.sub.23, and R.sub.24, are as defined in the specification. The photographic material can be processed with a stable developer to provide an ultra-high contrast image without reduction in sensitivity, gamma or maximum density or the appearance of black pepper. The photographic material is excellent in pressure properties and anti-blocking properties.

REFERENCES:
patent: 4385108 (1983-05-01), Takagi et al.
patent: 4518689 (1985-05-01), Noguchi et al.
patent: 4722884 (1988-02-01), Inoue et al.
patent: 4761362 (1988-08-01), Sasaoka et al.

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