Edouard Bastarache on wed 21 mar 01
Hello all,
as promised a few weeks ago I finally had a meeting with Jean-Yves =
Beaudoin,
metallurgist, about this problem of transforming trivalent chromium to =
hexavalent
chromium.
After having given him all the necessary information on pottery making=20
technology he concluded that it is impossible to produce hexavalent =
chromium
in our kilns.
Firstly, chromium melts at 1903 C, which is a much higher melting =
temperature than
the ones used in pottery making.
Secondly, a very rich oxidizing atmosphere is necessary like the =
presence of sodium
peroxide and an oxygen line feeding the kiln as we feed steel furnaces;
I do not think it would be safe for potters to feed their kilns with an =
oxygen line.
So, let us forget about this theoritical problem.
Later,
Edouard Bastarache
Irr=E9ductible Qu=E9becois
Sorel-Tracy
Dans / In "La Belle Province"
edouardb@sorel-tracy.qc.ca
http://www.sorel-tracy.qc.ca/~edouardb/
Dave Finkelnburg on thu 22 mar 01
Hello Dr. Bastarache!
Your report is the best of what ClayArt is, can and should be. Great
work! You have taken a question, researched it with an authoritative
source, and shared that information. We should all be grateful for such
personal efforts as yours.
Dave Finkelnburg in spring weather (today) in Idaho, but always jealous
of Edouard's beautifully thrown and glazed bottles! :-)
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