Direct-positive emulsion containing silver halide grains interna

Details Direct-positive emulsion containing silver halide grains interna Direct-positive emulsion containing silver halide grains interna

1974-10-18

1976-08-31

Louie, Jr., Won H.

Gas separation: apparatus

Solid sorbent apparatus

96107, 96109, 96139, 96140, G03C 128

Patent

active

039778800

ABSTRACT:
A direct positive silver halide photographic emulsion comprising a hydrophilic colloid containing (1) silver halide grains the surface of which is fogged with a sulfur compound and a gold compound, or (2) silver halide grains which are (a) ripened with a sulfur compound and then the surface of which is fogged by optical exposure or (b) ripened with a sulfur compound and a gold compound and then the surface of which is fogged by optical exposure.

REFERENCES:
patent: 1574944 (1974-10-01), Sheppard
patent: 2399083 (1946-04-01), Waller et al.
patent: 2624674 (1953-01-01), Tarkington et al.
patent: 3367778 (1968-02-01), Berriman
patent: 3632340 (1972-01-01), Illingsworth
patent: 3672900 (1972-06-01), Kurz

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