Light-absorbing fluorine-containing 2-pyrazolin-5-one methine oxonol dyes corresponding to the formula ##STR1## wherein R is C.sub.1 -C.sub.5 alkyl, aryl, alkoxycarbonyl, carboxy, or carbamoyl, and n is 0, 1, or 2. The dyes can be used in light-sensitive silver halide materials in an antihalation layer, in a filter layer or as screening dyes in a light-sensitive layer. They manifest great stability while in dissolved state within a very large pH-range and they are decolorized easily in one of the processing baths. They are prepared by joining 2 appropriately substituted pyrazolone rings in 4-position by 1 methine group through reaction with an ester of an orthocarboxylic acid or by a tri- or pentamethine group through reaction with .beta.-anilinoacrolein anil HCl or glutaconic dialdehyde dianil HCl respectively.
具有吸光性的含
氟2-
吡唑啉-5-酮甲氧醇
染料,其对应于公式##STR1##其中R是C.sub.1-C.sub.5烷基,芳基,烷氧羰基,羧基或
氨基甲酰基,n为0、1或2。这些
染料可以在抗光层、过滤层或作为光敏层中的筛选
染料中用于光敏
银卤化物材料中。它们在非常大的pH范围内溶解状态下表现出极大的稳定性,并且它们可以在其中一种处理浴中轻易脱色。它们是通过将2个适当取代的
吡唑酮环在4位上通过与正交
羧酸酯或β-苯基
丙烯醛盐酸盐或谷二醛二苯基盐酸盐反应而通过1个甲基基团连接起来制备的三甲基或五甲基基团。