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注意,两液要分别配制,使用之前再进行混合,将底片在混合液中进行漂白,待影象彻底消除后,在流动清水中水漂15分钟(不要溅上其它药物),然后在D-72原液(不稀释)中进行显影还原,显影速度较为缓慢,整个显影过程不少于5分钟。需要说明的是,采用漂白——还原的办法处理后,胶片上的密度要减浅一些,如果是局部变黄的胶片,将浅密度部位用涂红的方法进行补匀,以保胶片质量。
Note that the two liquid to be prepared separately, before use before mixing, the film bleach in the mixture until the image is completely eliminated, the water in the flowing water for 15 minutes (do not splash on the other drugs), and then in the D- 72 stock solution (not diluted) in the development of reduction, the development speed is more slow, the entire development process of not less than 5 minutes. It should be noted that the use of bleaching - reduction approach, the density on the film to be lighter, if it is partially yellowing film, the shallow density of the site with red coating method to ensure the quality of the film.