| abstract |
Fading inhibitor for use in colour photographic material with a Ag halide emulsion contg. a magenta coupler of the 3-anilino-5-pyrazolone type is a 2,5-di-tert.-alkyl-p-hydroquinone deriv. (I) of the formula (in which R1 is a linear, branched or cyclic alkyl or alkanesulphonyl, heterocyclic, trialkylsilyl, arylsulphonyl, aralkanesulphonyl or CYO gp.; Y is a linear, branched or cyclic alkyl, ar(alk)yl, alkoxy, ar(alk)yloxy, (di)alkylamino, (di)arylamino, (ar)alkoxy- or aryloxycarbonyl or acyl gp. R2 and R3 are (6-10C) tert. alkyl gps.). Fading of the magenta image and discoloration of the whites are inhibited and the magenta images are not mixed with cyan colours. |