Photographic emulsion containing unfogged, heterodisperse layere

Details Photographic emulsion containing unfogged, heterodisperse layere Photographic emulsion containing unfogged, heterodisperse layere

1974-06-24

1976-05-18

Louie, Jr., Won H.

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96 94R, G03C 102, G03C 524

Patent

active

039574881

ABSTRACT:
A photographic material for producing direct-positive photographic images with at least one silver halide emulsion layer containing unfogged heterodisperse silver halide grains with a core which consists predominantly of silver bromide and a localised phase with a high silver chloride content of at least 20 mols-%, the total concentration of silver chloride, based on the total silver halide content of the grain, is less than 30 mols-%, and at least 10% by weight of the silver halide grains have a diameter which deviates by at least 40% from the average grain diameter in which the silver halide grains are not or only slightly chemically sensitised on the surface.

REFERENCES:
patent: 2497875 (1950-02-01), Fallesen
patent: 2592250 (1952-04-01), Davey et al.
patent: 3206313 (1965-09-01), Porter et al.
patent: 3501305 (1970-03-01), Illingsworth
patent: 3761266 (1973-09-01), Milton

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