Yeah, the copper usually gets you, that's why I just went ahead and included the numbers in the mixture to work with.So, I was doing the math on my spreadsheet based on some of the numbers you had mentioned earlier, it never occurred to me to take into account the melting of the copper in the coin silver as you posted
It takes 1.22 ml. of 70% Nitric to dissolve 1 gram of silver.
It takes 4.3 ml. of 70% Nitric to dissolve 1 gram of copper.
For 1 gram of Coin silver - 90/10, Ag/Cu:
(1.22 x .90) + (4.3 x .10) = 1.53 ml of 70% nitric or 3.06 ml of 50/50 nitric
Enter your email address to join: