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在照相加工时间中,水洗所占的比例很高,可以说胶片加工中约60％的时间,印片加工中约80％的时间都耗费在水洗上。然而,如果考虑到水洗效率,就能够大幅度缩短加工时间中水洗所占的比例。水洗的目的是除去水洗的前一工序,即定影液,特别是定影剂硫代硫酸盐,其次除去由定影加工所产生的定影物(可溶性银铬盐,硫代硫酸银钠)及吸附在胶片或相纸上的各种药品。如果不能彻底地清除乳剂中残存的硫代硫酸盐,那么影像银在保存中由于
In photographic processing time, the high proportion of washing, it can be said that about 60% of film processing, printing process for about 80% of the time spent in water washing. However, if the washing efficiency is taken into account, the proportion of washing in the processing time can be drastically shortened. The purpose of the washing is to remove the former step of washing, that is, the fixing solution, in particular, the fixing agent thiosulfate, and secondarily remove the fixing material (soluble silver chromate salt, sodium silver thiosulfate) produced by the fixing process, Or photo paper on the various drugs. If you can not completely remove residual thiosulfate in the emulsion, then the image of silver in the preservation due to