Photographic high contrast silver halide material

Details Photographic high contrast silver halide material Photographic high contrast silver halide material

1997-12-18

1999-11-16

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430414, 430415, 430416, 430571, G03C 112, G03C 1295

Patent

active

059855096

ABSTRACT:
A high contrast photographic material comprises a support bearing a silver halide emulsion layer. This material is free from nucleating agents and has a silver:gelatin ratio greater than 1. The emulsion layer comprises silver halide grains that are spectrally sensitized. Moreover, the material contains a density enhancing amine compound in the emulsion layer or in an adjacent hydrophilic colloid layer. The spectrally sensitized silver halide grains comprise one grain population sensitized to radiation of a particular wavelength region, and one or more additional grain populations sensitized to radiation of a different wavelength region.

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