| abstract |
PURPOSE:To prevent lowering of the max. density due to interreaction of an emulsion during the storage of raw stock, and remarkable color fog by blocking the H atoms of the -NH- group of a pyrazoloazole structure. CONSTITUTION:The magenta color image-forming coupler to be used is represented by formula I in which X is H or a group to be released by the coupling reaction; R1 is H or a substituent; and Za, Zb, and Zc are each optionally substd. methine or -N=. Especially preferable one of the 5- and 6-membered condensed hetero ring couplers of formula I is represented by formula I-a, I-b, and as R2, an acyl group and a sulfonyl groupare especially preferable. |