Method for obtaining a photographic coating composition
AssigneeEastman Kodak Company
InventorsJacques Le Faou, Jean-Claude Hervieux
Life of this patent
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Abstract
The present invention relates to a method for obtaining a silver halide photographic composition for a coating layer. The method consists in individually preparing the various components of the desired layer, comprising at least one silver halide emulsion, and solutions or dispersions containing one or more finishing addenda and/or gelatin, chilling these components to solidify each of them, cutting them into chunks, cold-blending, in a solid state, the components selected according to the formulation of the desired layer, and liquefying the resulting solid composition just before its introduction into the coating station. The method can be applied to all types of silver halide photographic products, for black and white or color photography.
Claims10
A method for preparing a photographic composition for a coating layer having a desired formulation, said formulation containing at least a silver halide emulsion and chemical addenda, and gelatin, the method comprising in order the following steps:
- 1)(a) preparing individually a plurality of components of the desired formulation, said components being selected from (i) silver halide emulsions, or (ii) materials selected from the group consisting of solutions or dispersions of chemical addenda and gelatin, and
- 1)(b) separately solidifying each of said plurality of components by chilling;
- 2) separately cutting each of said plurality of components into chunks;
- 3) selecting the amount of chunks from step 2 of each of said plurality of components so as to produce the desired formulation of the coating layer;
- 4) cold blending, in a solid state, the chunks of said plurality of components selected from step 3;
- 5) liquefying the resulting blend obtained in step 4 prior to feeding it into a coating station.
Dependencies are inferred from the claim text.