Bill Merrill on tue 27 oct 09
The question is: How much of the unknown substance that you think is
lithium do you have? If is a relatively small amount, set it aside and
buy new lithium if you need it. Do a couple of tests with a glaze that
requires lithium. Mix two glazes, one with what you know is lithium and
one with the "unknown" material. That is one way to see what you've
got.
=3D20
Do a fusion button of both of them mixed with a feldspar. This may show
that the materials are the same...at least visually.
=3D20
I think all the scientific ways are great if you have the time to do the
tests....for me life is to....
=3D20
Here is a cone 016 Raku glaze with lithium carbonate. You might pare
the frits down to one for any tests. This glaze is good for Raku,
especially if the pot is plunged into water, a desired crazing appears
on the surface. A pot could be ruined at this point, but with lithium
carbonate and because of lithium's thermal stability, there is scarce
danger of breakage. Lithium lowers the coefficient of expansion which
means that shrinkage problems are minimized.
=3D20
43.6 Frit 25
=3D20
26.3 Frit 3134
=3D20
9.9 Lithium Carbonate=3D20
=3D20
6.2 china clay=3D20
=3D20
14 flint
=3D20
=3D20
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Bill=3D20
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