Direct positive silver halide elements

Details Direct positive silver halide elements Direct positive silver halide elements

1973-11-20

1977-11-22

Louie, Jr., Won H.

Gas separation: apparatus

Chromatography type apparatus

96107, 96108, 96120, G03C 136, G03C 128

Patent

active

040594505

ABSTRACT:
Direct positive silver halide emulsions are provided which contain fogged silver halide grains with a layered grain structure wherein the external shell of the silver halide grains comprise up to 20 mole % of silver iodide based on the silver halide of the shell. The emulsions show improved sensitivity and produce images of improved maximum density.

REFERENCES:
patent: 3320069 (1967-05-01), Illingsworth
patent: 3367778 (1968-02-01), Berriman
patent: 3531290 (1970-09-01), Litzerman
patent: 3647455 (1972-03-01), Burt et al.
patent: 3740226 (1973-06-01), Dappen
patent: 3759713 (1973-09-01), Florens

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