Photoprocessing photographic elements comprising water soluble hydrophilic polymers
AssigneeEastman Kodak Company
InventorsLloyd A. Lobo, Tiecheng A. Qiao, Brian J. Kelley
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Abstract
The present invention is also directed to a method of photoprocessing a photographic imaging element having a processing-solution-permeable overcoat that comprises at least one water-dispersible hydrophobic polymer interspersed with a water-soluble hydrophilic polymer. During photoprocessing, a surface-active water-soluble hydrophilic polymer is leached into a photoprocessing solution. However, foaming due to the hydrophilic polymer in the photoprocessing solution is prevented by the presence of a non-ionic surfactant having an HLB of less than 12.
Claims21
A method of photoprocessing a photographic element, which method comprises:
- (a) providing an imagewise exposed photographic element comprising a support, a silver-halide emulsion layer superposed on a side of said support, a processing-solution-permeable overcoat overlying the silver-halide emulsion layer, said overcoat having a laydown of at least 0.54 g/m2 and comprising a water-insoluble hydrophobic polymer and a water-soluble hydrophilic polymer, such that at least 50% of the hydrophilic polymer is removed from the layer during the photoprocessing operation, wherein the amount of hydrophilic polymer is greater than 0.1 g/m2;
- (b) developing the photographic element in a developer solution having a pH greater than 7 and containing a nonionic surfactant having an HLB of less than 12 and a solubility at 25° C. of greater than 200 ppm, which nonionic surfactant is in the developer solution at a level less than 1000 ppm, whereby the surfactant substantially prevents the water-soluble polymer from foaming during photoprocessing even after a build-up of soluble hydrophilic polymer from photoprocessing a plurality of photographic elements in the same developing solution;
- and
- (c) drying the photographic element.
Dependencies are inferred from the claim text.