Increasing speed and contrast of photographic emulsions
United States Patent 2419975

Inventors:
Trivelli, Adrian P. H.
Smith, William F.
Publication Date:
05/06/1947
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Assignee:
EASTMAN KODAK CO
Primary Class:
430/441
Other Classes:
430/599, 430/944, 430/446, 430/564, 430/448, 430/600
International Classes:
G03C1/06
US Patent References:
2220929Photographic developing solutions containing aromatic hydrazines, their preparation and use
2245236Method of increasing infrared sensitivity
2311098Photographic film comprising nitrocellulose film base stabilized by a dihydrazide of an aliphatic dicarboxylic acid
2196734Colored photographic image from hydrazine compounds
2266442Color print by multiple color development
2286662Color photography
2309492Process for avoiding color fog on photographic color material
2339213Color development process using aromatic hydrazines