Core/shell direct positive silver halide emulsion with silver ha

Details Core/shell direct positive silver halide emulsion with silver ha Core/shell direct positive silver halide emulsion with silver ha

1994-08-08

1995-06-13

Schilling, Richard C.

Radiation imagery chemistry: process, composition, or product th

Transfer procedure between image and image layer, image...

Diffusion transfer process, element, or identified image...

430569, 430599, 430567, 430600, 430603, G03C 810, G03C 1015, G03C 110, G03C 1485

Patent

active

054241685

ABSTRACT:
There are disclosed an internal latent image type direct positive light-sensitive emulsions having improved spectral sensitization performance, and chemical sensitization performance, and color diffusion transfer photographic film units in which said emulsions are used. The emulsions are prepared by subjecting a silver halide grain, which forms an internal nucleus, to chemical sensitization, in the presence of an organic silver halide solvent, and adding a solid adsorbing agent, before finishing the formation of an outer shell silver halide phase, to remove a part or all of the silver halide solvent, wherein the emulsions may further contain a tabular silver halide grain having an average grain diameter of at least 0.3 .mu.m and a ratio of an average grain diameter to an average grain thickness of 2 or more, based on 50% or more of the total silver halide grains.

REFERENCES:
patent: 4665017 (1987-05-01), Mifune et al.
patent: 4678745 (1987-07-01), Yamada et al.
patent: 4801524 (1989-01-01), Mifune et al.
patent: 4845023 (1989-07-01), Mifune
patent: 4863845 (1989-09-01), Murai et al.
patent: 5030552 (1991-07-01), Iwasaki et al.

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