I agree with Gustavus, never work with acids indoors unless you have a fume cupboard.
I also agree that PM refining questions are better answered on the Gold refining forum.
I do my own PM refining but if i explain how i do it on this forum and miss out an important step
no one is going to pick me up on it, except maybe Gustavus of course!
this how mistakes can be made and you could hurt yourself.
Gustavus, thanks for pointing that out. I've edited my post to reflect the safety issue.
Regards
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