A methine oxonol dye having a bis-(2-pyrazolin-5-one nucleus) substituted with
a) acyl groups in the 3 and 3ʹ position,
b) aryl groups in the 1 and 1ʹ position, and
c) bearing from 4 to 6 acidic substituents, each of which are capable of forming a monovalent anion provided that at least two of such substituents are other than carboxyl, is disclosed for use as filter dyes in photographic elements.
本发明公开了一种具有双-(2-
吡唑啉-5-酮核)的甲
氨酸氧杂
壬醇染料,该双-(2-
吡唑啉-5-酮核)被 a) 3 和 3ʹ 位上的酰基,b) 1 和 1ʹ 位上的芳基,以及 c) 4 至 6 个酸性取代基取代,其中每个取代基都能形成单价阴离子,条件是其中至少有两个取代基不是羧基,该
染料可用作摄影元件中的过滤
染料。