发明授权
US3947272A Silver halide emulsions containing 2-pyrazolon-5-one photographic colour couplers 失效
含有2-吡唑啉-5-酮照相彩色成色剂的卤化银乳剂

Silver halide emulsions containing 2-pyrazolon-5-one photographic colour
couplers
摘要:
Novel magenta forming colour couplers for use in silver halide colour photography are described which correspond to the formula: ##EQU1## wherein R.sub.1 represents hydrogen, alkyl or aryl; R.sub.2 represents fluoroalkyl, cyanoalkyl or phenyl; X is hydrogen or a displaceable group; Ar represents phenylene and Y represents alkyl, aryl, alkylamino, arylamino or alkylarylamino.
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