Silver halide photographic material

Details Silver halide photographic material Silver halide photographic material

1993-02-02

1994-08-23

Neville, Thomas R.

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430598, 430588, 430551, G03C 106

Patent

active

053406940

ABSTRACT:
A silver halide photographic material contains at least one hydrazine compound of formula (I): ##STR1## where R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents an alkyl group, an aryl group or a heterocyclic group; and R.sub.1 and R.sub.2, R.sub.3 and R.sub.4, R.sub.1 and R.sub.3, and R.sub.2 and R.sub.4 each may be bonded to each other to form a non-aromatic ring; provided that the carbon atom of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 which is directly bonded to a nitrogen atom of the hydrazine core of the compound is not substituted by an oxo group. The material has a high sensitivity and does not tend to fog. After storage, depression of the sensitivity of the material is small.

REFERENCES:
patent: 4571380 (1986-02-01), Noguchi et al.
patent: 4777118 (1988-10-01), Kitchin et al.
patent: 4975354 (1990-12-01), Machonkin et al.
patent: 5190853 (1993-03-01), Seto et al.

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