Photographic element for the production of subtractive color images by sulfonhydrazide color development

Claim 1

A PHOTOGRAPHIC COLOR TRIPACK COMPRISING A BASE, A RED SENSITIVE SILVER HALIDE EMULSION ON THE BASE CONTAINING AS A CYAN COLOR FORMER, A COLORLESS COMPOUND CONTAINING A PHENOLIC HYDROXYL GROUP AND HAVING A GROUP RENDERING THE COLOR FORMER NON-MIGRATORY IN THE EMULSION AND BEING SUBSTITUTED PARA TO THE PHENOLIC HYDROXYL GROUP BY A SUBSTITUENT REPLACEABLE ON DEVELOPMENT WITH A PRIMARY AROMATIC AMINO DEVELOPER TO FORM A CYAN QUINONEIMINE DYE IMAGE BUT NOT REPLACEABLE ON DEVELOPER WITH A SULFONHYDRAZIDE DEVELOPER, A GREEN SENSITIVE SILVER HALIDE EMULSION ON THE RED SENSTIVE EMULSION CONTAINING AS AN AZO DYE COUPLING COMPONENT CAPABLE OF FORMING A MAGENTA AZO DYE WITH A SULFONHYDRAZIDE DEVELOPER, A COLORLESS NAPHTOL BEARING A GROUP RENDERING IT NON-MIGRATORY IN THE EMULSION AND HAVING A FREE COUPLING POSITION SELECTED FROM THE CLASS ORTHO AND PARA TO THE PHENOLIC HYDROXYL GROUP OF THE NAPHTHOL, AND A BLUE SENSITIVE SILVER HALIDE EMULSION ON THE GREEN SENSITIVE EMULSION CONTAINING AS AN AZO DYE COUPLING COMPONENT, A COLORLESS COMPOUND HAVING A GROUP RENDERING IT NON-MIGRATORY IN THE EMULSION, SAID COMPOUND BEING CAPABLE OF FORMING A YELLOW AZO DYE WITH A SULFONHYDRAZIDE DEVELOPER AND BEING SELECTED FROM THE CLASS CONSISTING OF PYRAZOLONES, OPEN CHAIN KETOMETHYLENE COMPOUNDS AND MONOCYCLIC PHENOLS.