Formation of black-and-white silver-containing negative images b

Details Formation of black-and-white silver-containing negative images b Formation of black-and-white silver-containing negative images b

1981-06-08

1982-11-09

Kittle, John E.

Radiation imagery chemistry: process, composition, or product th

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

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

430417, 430598, 430614, G03C 106, G03C 554, G03C 148

Patent

active

043585280

ABSTRACT:
A black-and-white negative image forming process is disclosed using a diffusion transfer type film unit. An exposed silver halide emulsion comprising internal latent image type silver halide grains which have substantially no fogging centers at their surface is processed with a composition comprising a silver halide solvent, a developing agent, a foggant, alkali and a fog promoting agent. The solvent for the silver halide characteristically possesses a solubilizing power for AgBr of from about 2.times.10.sup.-5 to 5.times.10.sup.-3 mol/l in a 0.002 molar aqueous solution.

REFERENCES:
patent: 4030925 (1977-06-01), Leone
patent: 4309499 (1982-01-01), Takagi

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