Gwyn Ace on wed 22 dec 99
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I have noted various glaze formulations including Lead Sesquisilicate. =
..there
appears to be an important variation in this frit and a coated frit should =
be
expected to produce a low lead release but an uncoated frit should be =
expected
to produce a high lead release. It would be therefore important to ensure =
that a
variation in source of supply or type does not invalidate test results.
references Podmore/hamer/ferro
good potting in 2000 Gwyn in Napier N.Z.
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