在快速及慢速影液中加入有机防雾剂苯骈三氮唑(C_6H_5N_3),可以有效地消除过期5～6年光谱分析用感光板上所产生的严重雾翳。试验结果证明:在快速及慢速显影液中分别加入0.4克及0.2克C_6H_5N_3即可达到满意的效果,具体用量应根据感光板过期长短、显影液性质、显影温度等情况,经过试验后确定。C_6H_5N_3对乳剂特性曲线基本性质没有引起很大的改变,但是曲线的曝光过度部分提早出现,而直线部分 The addition of organic antifogging agent benzotriazole (C_6H_5N_3) to the fast and slow shadows can effectively eliminate the severe haze produced on the plate for spectroscopy 5 to 6 years after expiration. The test results show that: 0.4 g and 0.2 g C_6H_5N_3 can be used to achieve satisfactory results in fast and slow developer, the specific amount should be based on the expiration of the photosensitive plate length, developer properties, development temperature and so on, after the test determined. C_6H_5N_3 did not change the basic properties of the emulsion characteristic curve greatly, but the overexposure of the curve appeared earlier and the linear part