A new type of hydrazide compounds is disclosed corresponding to general formula (A) :
the symbols of which are explained in the description. Examples of synthesis are given. Incorporation of these diacyl hydrazides into the silver halide emulsion layer(s) of a photographic material causes a significant increase in sensitivity.
与通式 (A) 相对应的新型酰
肼化合物已被公开:
的符号已在说明中解释。给出了合成实例。将这些二酰
肼掺入感光材料的卤化
银乳剂层中可显著提高感光度。