Aug 03, 2012· Anyone know anything about refining .925 and .900 silver?? Anyone know anything about refining .925 and .900 silver?? ... I saw something about using Nitric Acid and distilled water but that was as far as I got. ... I just need help with the steps of refining the silver to a pure state. I am also looking for info on how to make a MAPP Gas kiln ...