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一、怎样防止底片上产生水斑有的国产胶卷经显影、定影、水洗等过程,吊挂在晾干架上,用海绵将胶卷上的药和水迹擦拭之后,仍有一些细小水珠积存。这是由于乳剂胶膜涂布较厚,在风干过程中,浮在胶膜表面的水珠一部分随着风干而蒸发,另一部分则慢慢浸入乳剂胶膜里。而这部分水迹密度比周围密度浅,因此产生了水斑。尤其是在画面上的灰色天空部位更加明显。从而影响照片质量。其防止方法如下:
First, how to prevent water spots on the film Some domestic films by the development, fixing, washing and other processes, hanging in the drying rack, with a sponge on the film after the medicine and water traces, there are still some small drops of water accumulation . This is due to the fact that the emulsion film is applied thickly. During air-drying, a part of the water droplets floating on the surface of the film evaporates when air-dried and the other part slowly dips into the emulsion film. And this part of the water density density than the surrounding shallow, resulting in water spots. Especially in the gray sky on the screen site more obvious. Thus affecting the photo quality. The prevention method is as follows: