Laura Conley on thu 23 jul 98
Monona and others,
I'm compiling a raw materials list, have decided to include information on
toxicity, and upon rereading Monona's recent post on the unsafety of lead frits,
have uncovered some questions.
If lead frits are as dangerous as red lead for inhalation and ingestion (what
about skin contact?) then are barium frits, stains (including CdSe inclusion
pigments), and other such compounds equally dangerous (inhal, ingest), relative
to the toxicity of the raw chemicals?
Laura Conley
Boulder, CO
Monona Rossol on sat 25 jul 98
Toxicity question from L. Conley---
Forwarded from Clayart
> If lead frits are as dangerous as red lead for inhalation and ingestion >
(what about skin contact?) then are barium frits, stains (including CdSe >
inclusion pigments), and other such compounds equally dangerous (inhal, >
ingest), relative to the toxicity of the raw chemicals? <
No one knows. All the books say that lead doesn't skin absorb. This was
said on the bases of absolutely no data. Then in about 1989 it was finally
studied. But only three sources of lead were studied: lead metal dust,
lead oxide powder, and lead nitrate powder. All three were radio-tagged
and they were found to all go right through the skin. The absorption was
particularly fast if the worker was perspiring
But lead silicates and other frits, stains, etc. have never been studied.
The best thing is to assume that maybe they do go through the skin until
someone knows for sure.
Monona Rossol
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