coins cleansing



coins cleansing defined in 1909 year

coins cleansing - Coins cleansing;
coins cleansing - Coins can be quickly cleansed by immersion in strong nitric acid, and immediate washing in water. If very dirty, or corroded with verdigris, it is better to give them a rubbing with the following:
  • ½ oz. pure bichromate of potash.
  • 1 oz. sulphuric acid.
  • 1 oz. nitric acid.
Rub over, wash with water, wipe dry, and polish with rottenstone or chalk. (Lyle.)

near coins cleansing in Knolik


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