Photographisches Material und Verfahren enthaltend einen bicyclischen Pyrazolo-Kuppler

Novel bicyclic pyrazolo couplers containing a ballast group of formula (I): 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 development speed when empl...

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Bibliographische Detailangaben
Hauptverfasser: TANG, PING WAH, COWAN, STANLEY W
Format: Patent
Sprache:ger
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Zusammenfassung:Novel bicyclic pyrazolo couplers containing a ballast group of formula (I): 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 development speed when employed in color photographic materials and processes.