Method for forming a photosensitive silver halide element
AssigneePolaroid Corporation
InventorsArthur M. Gerber, Warren D. Slafer, Vivian K. Walworth
Life of this patent
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Abstract
A photosensitive silver halide element comprising a support carrying photosensitive silver halide grains in a predetermined spaced array is prepared by a method which comprises at least partially coalescing fine-grain silver halide in a plurality of spaced depressions in a hydrophobic layer, superposing said layer with a hydrophilic layer during or subsequent to said coalescence, and then separating said hydrophilic layer and said hydrophobic layer whereby said coalesced silver halide grains are retained on said hydrophilic layer in a pattern corresponding substantially to the pattern of said spaced depressions.
Claims51
A method for forming a photosensitive element comprising a support carrying photosensitive silver halide grains in a predetermined spaced array which comprises at least partially coalescing fine-grain silver halide in a plurality of depressions in a hydrophobic layer, superposing a hydrophilic layer and said hydrophobic layer, and thereafter separating said hydrophilic layer from said hydrophobic layer, whereby silver halide grains are retained on said hydrophilic layer in a pattern corresponding substantially to the pattern of said spaced depressions.
A method for forming a photosensitive element comprising a support carrying a plurality of single effective silver halide grains in a predetermined spaced array which comprises the following steps:
- (a) depositing a fine-grain silver halide emulsion in a plurality of predetermined spaced depressions in a hydrophobic layer;
- (b) applying a solution of silver halide solvent in an amount sufficient to partially dissolve said silver halide grains in each depression;
- (c) coalescing said grains to a single effective silver halide grain in substantially each depression;
- (d) superposing said hydrophobic layer and a hydrophilic layer;
- and
- (e) separating said hydrophilic layer from said hydrophobic layer whereby the thus-formed single effective silver halide grains are retained on said hydrophilic layer in a pattern corresponding substantially to said pattern of said spaced depressions.
Dependencies are inferred from the claim text.