Question : What is the reason for the use of Sodium Thiosulphate in Photography?
Option 1: Reaction with light
Option 2: Ability to form complexion
Option 3: Oxidising behaviour
Option 4: Reducing behaviour
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Correct Answer: Ability to form complexion
Solution : The correct option is the ability to form complexion.
Sodium Thiosulfate (Na 2 S 2 O 3 ), known as hypo, is a main ingredient in photography because of its ability to produce a complexion. Its capacity to produce soluble silver thiosulfate complexes with unexposed silver halide crystals makes it useful in photography. This intricate structure makes it possible to extract the unexposed crystals from the light-sensitive material during the fixing stage of the photography process.
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