Hello!
I tried to work with a "unknown" button, (Cu, Ag,Au,...), of 200 grams.
1) I used 750 ml of Nitric Acid to sissolve base metals
2) after filtering, I had a Blue solution of base metal and a red/violet mud (see the pictures)
I tried to work with a "unknown" button, (Cu, Ag,Au,...), of 200 grams.
1) I used 750 ml of Nitric Acid to sissolve base metals
2) after filtering, I had a Blue solution of base metal and a red/violet mud (see the pictures)