PHOTOGRAPHIC MATERIAL SUITED FOR USE IN DIFFUSION TRANSFER PHOTOGRAPHY AND METHOD OF DIFFUSION TRANSFER PHOTOGRAPHY USING SUCH MATERIAL

摘要

Said material contains a quinone-type compound which corresponds to one of the formulae (A) or (B) and which is capable in reduced state and under alkaline conditions of releasing a photographically useful group e.g. a dye: (A) (B) wherein: each of (Nuox)1 and (Nuox)2 represents an oxidized nucleophilic group, Z represents a bivalent atomic group which is electronegative, Q together with the Z group represents a releasable photographically useful group, each of R1, R2 and R3 is hydrogen, halogen, alkyl, alkoxy, or an acylamino group or R1 and R2 in adjacent positions on the ring form a ring fused with the remainder of the molecule, or R2 and R3 together are fused with the remainder of the molecule. each of R4 and R5 represents hydrogen or a hydrocarbon group. At least one of the substituents R1, R2, R3, R4 or R5 is a ballasting group X.