Photographic elements containing color-forming couplers...

Details Photographic elements containing color-forming couplers... Photographic elements containing color-forming couplers...

C - Chemistry, Metallurgy

09

B

96/194, 260/541,

C09B 57/00 (2006.01) G03C 1/10 (2006.01) G03C 7/305 (2006.01)

Patent

CA 1053698

Abstract Color photographic elements containing silver halide and incorporated color-forming materials are described. These elements contain at least two differentially light-sensitive emulsion layers, the overlying layer being sensitive to the relatively shorter wavelengths and containing at least one yellow dye-forming color coupler which has the unusual ability to inhibit the reaction of competing couplers (such as citrazinic acid for example) when competing couplers are used in color developing solutions in the conventional manner. Use of these couplers in the overlying (color) layer of multi-layer color photographic elements makes it possible to produce colored images having improved graininess and sharpness of the image. Couplers having this unusual capability are selected from those having the structure : Image wherein R1 and R2 can differ and are non-interfering couplers substituent groups; at least one of R1 and R2 being a ballasting group. - 1 -

314171

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