Photographic coupler dispersions

Details Photographic coupler dispersions Photographic coupler dispersions

G - Physics

03

C

96/146

G03C 7/32 (2006.01) G03C 7/388 (2006.01)

Patent

CA 1261190

-0- PHOTOGRAPHIC COUPLER DISPERSIONS Abstract of the Disclosure Loss in dark stability of a photographic silver halide element can be reduced by introducing into a dispersion comprising a dye-forming coupler for preparing such an element, a lipophilic anionic surfactant which comprises a sulphate or sulphonate group as the sole hydrophilic group and either a single aliphatic hydrocarbon group having at least 15 carbon atoms or two or more aliphatic hydrocarbon groups which together contain at least 17 carbon atoms. A second, less lipophilic, anionic surfactant can also be used in preparing the coupler dispersion.

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