Hello everyone,
I dipped an 800 silver ring in boiling in a solution of vinegar and salt in order to remove the black oxide resulting from the melting of the metal, after I pulled it out and rinsed it off, the oxide was gone. Once dried and placed on the work surface, after a few hours some green copper oxide began to form. I thought it might be due to the penetration of the vinegar into the pores of the metal and the consequent release of copper acetate. Do you have any advice? Thank you.
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