Sodium Hexametaphosphate, and Sodium Thiosulphate

Discussion in 'Ancient Coins' started by Topcat7, Mar 14, 2024.

  1. Topcat7

    Topcat7 Still Learning

    I recently came across these two chemicals in my cupboard. I believe that I would have purchased them for the purpose of cleaning coins.
    Is someone able to remind me:-

    1/- Which chemical is used for which (bronze/silver/cupro-nickel) coin, and
    2/- The method of cleaning for each, (including mixing ratios), please?

    Thanking you, in anticipation.
     
    Topcat7, Mar 14, 2024
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    sand and nerosmyfavorite68 like this.
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  3. Kentucky

    Kentucky Well-Known Member

    Sodium Thiosulphate for horn silver.

    Sodium Hexametaphosphate for copper
     
    Kentucky, Mar 14, 2024
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    sand, paddyman98, nerosmyfavorite68 and 2 others like this.
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