Direct positive photographic elements with incorporated...

G - Physics – 03 – C

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96/201

G03C 1/34 (2006.01) G03C 1/485 (2006.01)

Patent

CA 1258396

DIRECT POSITIVE PHOTOGRAPHIC ELEMENTS WITH INCORPORATED MAXIMUM DENSITY ENHANCING ANTIFOGGANTS Abstract of the Disclosure A black and white direct positive photo- graphic 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 encoun- tering rereversal, a decrease in minimum density, and an increase in the covering power of developed silver.

471296

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