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US5811230A Photographic material comprising a bicyclic pyrazolo coupler 失效
包含双环吡唑偶合剂的摄影材料

Photographic material comprising a bicyclic pyrazolo coupler
摘要:
Novel bicyclic pyrazolo couplers containing a fully substituted carbon at the 6-position of the bicyclic structure and a ballast group of formula (I): ##STR1## are useful in photographic materials and processes. The couplers exhibit increased coupling activity, and provide formation of dyes having improved maximum magenta image dye density, contrast, and photographic speed when employed in color photographic materials and processes. The variables are defined more specifically in the specification.
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