PHOTOGRAPHIC COLOUR COUPLERS AND PHOTOGRAPHIC MATERIALS CONTAINING THEM

摘要

PHOTOGRAPHIC COLOR COUPLERS AND PHOTOGRAPHIC MATERIALS CONTAINING THEM Novel photographic dye-forming couplers comprise an imidazo¢1,2-b!-pyrazole nucleus which reacts at its 3-position with an oxidized aromatic primary amino color developing agent. These couplers are monomeric or polymeric and are useful in photographic materials and processes and have improved absorption and solubility characteristics.