Silver halide photographic material and method for forming an im

Details Silver halide photographic material and method for forming an im Silver halide photographic material and method for forming an im

1987-12-09

1989-06-13

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430437, 430439, 430566, G03C 142, G03C 526

Patent

active

048392596

ABSTRACT:
Silver halide photographic material and method of forming an image using the same are disclosed. The material comprises one or more silver halide emulsion layers on a support, with a hydrazine derivative and a developing agent being incorporated in at least one of said emulsion layers. The image forming method comprises performing imagewise exposure of the above-described photographic material and developing said material with a developing solution that contains sulfite ions in a concentration of not less than 0.15 mole per liter and which has a pH within the range of from 9.5 to 12.3, and provides a supercontrasty negative image that has a very contrasty photographic characteristic of a gamma (.gamma.) of 10 or more and which is not highly susceptible to the occurrence of "black spots".

REFERENCES:
patent: 4377634 (1983-03-01), Mifune et al.
patent: 4385108 (1983-05-01), Takagi et al.
patent: 4447522 (1984-05-01), Hirano et al.
patent: 4560638 (1985-12-01), Loblaw et al.

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