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Why is sodium thiosulfate used in photography?

Addtime:2018/5/3 hits:



Photographic fixer. Photographic fixer is a mix of chemicals used in the final step in the photographic processing of film or paper. ... Popular salts are sodium thiosulfate—commonly called hypo—and ammonium thiosulfate—commonly used in modern rapid fixer formulae.


-------------------From Wikipedia.


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