Originally posted by firemanphob
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As for the sterling, nitric acid and other chems are usually used to refine it.
You need 50:50 nitric/water.
Getting the nitric has been a pain in the arse since 911. It is watched closely by the fed, so be prepared to answer questions.
Disolve the silver in the solution, mild warming of the solution will speed it along but in all cases "DO NOT" breath the fumes, and "DO NOT" bring it to boil.
This creates silver nitrate.
Once all the silver is dissolved filter the solution using coffee filters, you want the clear solution. The easiest way to get the Silver to precipitate out of the solution is to use Copper wire. Copper wire is pure copper and you don't have to worry about any other metals getting in your solution. Suspend the Copper wire, using household string in the acid solution. A white-grayish precipitate will start to appear around the copper wire. Tap the suspended Copper (lightly) and the Silver precipitate will sink to the bottom.
The solution should be light blue when all the silver has dropped out.
If not run a fresh wire through it again.
Filter the solution again with coffee filters, keeping the silver precip.
Rinse the silver precip thouroughly with water. If you see blue copper nitrate precip (what you replaced the silver precipitate with)
Effectively what you have left is 999 silver.
At that point you cast it into bullion.
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