"fine"...starts at .999 bullion grade which is plenty fine enough.
Typically, .999 assays at .9997 and .9999 at .99992.
Not much difference, completely negligible at 20 PPM "in water" where the
difference is in the low parts per billion and the most common contaminants
are copper and gold.
It's easy to get the lead and bismuth out. It just vaporizes at silvers
melting point and boils away. Copper has a higher melting point than
silver and is removed electrically. [Takes a higher voltage to get copper
ions moving, but a few probably hitch hike...same with the gold. ]
Ode
At 04:10 PM 6/18/2007 -0500, you wrote:
I have a friend who has a jewelry business and can buy silver
wholesale. His wholesale source has "fine" silver but no "9999" purity
designation. Anybody know what purity "fine" silver is?
Thanks,
SS
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