Jon Singer on mon 1 nov 99
Louis said, "There is a bit of bad logic in the assertion that
if litium [sic] is sometimes added to increase durability
then it must not leach from glazes."
...And as Ron points out, if it's out of balance it may leach,
just as sodium or potassium can.
I do believe that I overstated the case. My apologies,
and my thanks to both Louis & Ron for corrections.
By the same token, unless you are already taking lithium
for bipolar disorder, it would seem exceedingly unlikely
that you could get enough out of a fired glaze to hurt
yourself -- people who use lithium carbonate as a medication
typically take about a gram a day (!) -- see
http://www.ldanatl.org/articles/seab/weinberg/table12.html.
(Yes, I know, Li is a light ion; but a gram of the carbonate
contains over 180 mg of it unless there is some water of
crystallization.)
Best --
jon
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