| 摘要 |
Hydrophobic compounds, such as photographically useful compounds, are incorporated into an aqueous medium, such as a silver halide emulsion or a photographic coating composition, by forming a solid additive material comprising the hydrophobic compound and a solid hydrophilic material. The solid hydrophilic material is preferably a mixture of a polysaccharide and sorbitol or succinimide. The additive material is prepared by dry powder mixing the solid hydrophobic compound and solid hydrophilic material followed by a process step that heats, expells, and cools the composition to produce a high surface area uniform material having a specific surface area of at least about 10 square centimeters per gram. The additive material can then be dissolved directly and uniformly in the aqueous medium.
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