Direct positive photographic elements with incorporated maximum

Details Direct positive photographic elements with incorporated maximum Direct positive photographic elements with incorporated maximum

1985-06-06

1986-02-25

Louie, Won H.

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Positive

430409, 430523, 430598, 430940, G03C 524

Patent

active

045728925

ABSTRACT:
A black and white direct positive photographic element intended for the formation of a viewable silver image is disclosed. One or more silver halide emulsion layers are present containing internal latent image forming silver halide grains. A maximum density enhancing antifoggant is located in an undercoat between the emulsion layer or layers and the support to impart an increase in photographic speed, an extended overexposure margin before encountering rereversal, a decrease in minimum density, and an increase in the covering power of developed silver.

REFERENCES:
patent: 2497917 (1950-02-01), Stauffer
patent: 3499761 (1970-03-01), Dersch et al.
patent: 3671255 (1972-06-01), Haga et al.
patent: 3761276 (1973-09-01), Evans
patent: 4131467 (1978-12-01), Bigelow
patent: 4444865 (1984-04-01), Silverman et al.
patent: 4444874 (1984-04-01), Silverman et al.
Research Disclosure, vol. 151, Item 15162, Nov. 1976.

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