| 摘要 |
<p>PHOTOGRAPHIC COUPLER DISPERSIONS 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.</p> |
