专利号:US-5558974-A 优先权日:1994-03-11 标题 :Photographic material containing a new type of hydrazide 发明人:LOCCUFIER JOHAN; ANDRIESSEN HIERONYMUS 权利人:AGFA GEVAERT NV 摘要:A new type of hydrazide compounds is disclosed corresponding to general formula (A): (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.