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Hypo is used in Photography it is a solution of Sodium thio sulphate, Na2S2O3

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14y ago
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11y ago

it is used for washing the negative of cameras in olden times........

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12y ago

Hypo (sodium thiosulphate pentahydrate) is used as fixer during developing of a photographic film or plate.

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Q: Why is hypo used in photography?
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