论文部分内容阅读
引言水洗不足导致化学药品残留在照相材料中。其中有些化学药品,如硫代硫酸盐,不利于影象的保存。硫代硫酸盐在形成本测试法所测的密度值中起主要作用。本方法适用于早期及最近加工的胶片。
INTRODUCTION Insufficient water washing causes chemicals to remain in the photographic material. Some of these chemicals, such as thiosulfate, are not conducive to the preservation of the image. Thiosulfate plays a major role in forming the density values measured by this test. This method is suitable for early and recently processed film.