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一九七八年元月我们成功地从废定影液中回收了金属银,每25升废定影液可得到约80克金属银,经化验及光谱鉴定纯度在90％以上,为国家创造了财富,同时减少了污染,保护了环境。简单原理当x光胶片经曝光后,在胶片的乳剂层起光化学反应,产生了潜影,显影剂对胶片的感光部分发生作用,还原成黑色的金属银,呈现出各种影象;而胶片上未感光的银盐,在显影时不产生任何变化。在定影时,定影剂与胶片上的未感光部分作用,其反应过程如下:
In January 1978, we succeeded in recovering metallic silver from waste fixer, obtaining about 80 grams of metallic silver for every 25 liters of spent fixing solution, having created more than 90% purity by testing and spectroscopy, creating wealth for the country , While reducing pollution and protecting the environment. Simple Principle When the x-ray film is exposed, a photochemical reaction takes place in the emulsion layer of the film, producing a latent image, the developer acting on the photosensitive part of the film, reducing it to black metallic silver, exhibiting various images; Unpolluted silver salt, no change in the development. At the time of fixing, the fixing agent acts on the unexposed part of the film and the reaction process is as follows: