On Tue, 6 Aug 2002 01:32, you wrote:
> The big problem is, heavy metals is an every day fact of life, from paint
> to soap, from water pipe to the can of food. Unless you can find out just
> how a piece of ceramic was made, you are not likely to know.
>
> There are test kits out on the market that could give you an idea of what
> in your house might be giving off heavy metals (some glazes on ceramics are
> so bad they will leach, with nothing but hot water), but, just how precise
> they are, I have know idea. The idea is to start at the end product ( say
> the gray water ) and test your way back to the offending source.
>
> Greg H.
The talk of metals in Pottery is interesting, as I actually tested this when
I worked for a Consumer Magazine (the Aussie mag 'Choice') in the 70's last
century.
We sealed the lid on & boiled water (or it may have been ascetic acid)
in
ceramic pots, for extended time (from memory 100hrs?) I seem to remember that
few pots showed excessive lead in the glaze, & not enough to be a problem in
cooking, but some glazes DO contain lead. (& now with all the 3rd world
imported ceramic ware, who knows what we are getting.)
regards Doug
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