1935年Birr发现7-羟基-5-甲基-1,3,4-三氮吲唎嗪可用于稳定高速负性乳剂,至今此化合物仍起重要作用。尽管关于稳定剂抑制灰雾的机理设想很多,但稳定感光度的问题却受到忽视。Sheberstov的研究表明,高速照相乳剂层老化时能做到不产生较大灰雾,但感光度强烈衰退(即反常老化)。过 In 1935 Birr found 7-hydroxy-5-methyl-1,3,4-triazine indazoline can be used to stabilize high-speed negative emulsion, so far this compound still plays an important role. Although there are many hypotheses about the mechanism by which the stabilizer inhibits fogging, the problem of stable sensitivity has been neglected. Sheberstov’s research shows that high-speed photographic emulsion layer does not produce large fogging aging, but a strong decline in sensitivity (that is, abnormal aging). Too