Nucleated high contrast photographic elements containing...

Details Nucleated high contrast photographic elements containing... Nucleated high contrast photographic elements containing...

G - Physics

03

C

G03C 1/09 (2006.01) G03C 1/06 (2006.01) G03C 1/10 (2006.01) G03C 1/34 (2006.01)

Patent

CA 2099661

2099661 9302388 PCTABS00019 Silver halide photographic elements which are capable of high-contrast development and are especially useful in the field of graphic arts comprise surface latent image forming, high-chloride silver halide grains and have incorporated therein a hydrazine compound which functions as a nucleator, an amino compound which functions as an incorporated booster, and a combination of a gold compound and a urea compound which functions as a chemical sensitizer. Urea compounds effective for this purpose are 1,1,3,3-tetra-substituted middle chalcogen urea compounds in which at least one substituent comprises a nucleophilic center.

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