BERNARD SMITH on sat 1 nov 97
Does anyone have any knowledge of using sea shells to make a glaze?
What kind of preparation is needed? What were your results?
Reply privately if you wish.
TIA
barney
still very nice here in Minnesota (but the hammer is coming)
b.smith@nr.cc.mn.us
Lynnesque3 on sun 2 nov 97
barney, et al;
i have seen pots that were fired with the shells on them--left great shell
impressions!
lynn korbel
Clay Works by Lynnesque
on the ms gulf coast--storm warnings, cold front moving in--looking for my
favorite red sweater :-)
Louis Katz on mon 3 nov 97
Very little experience here with the use of shells in glazes. If you get
them ground up you might try thier substitution one for one with the
Calcium Carbonate in the following glazes.
Redart Fake Ash
Redart 60
Calcium Carbonate 40
Katz 111
1 Calcium Carbonate
1 Silica
1 Kaolin
It is tempting to suggest firing the shells to about 1500 degrees F. and
then slaking them. I don't suggest this slaking quicklime is hazardous and
not as easy to use in glazes as the ground shells, uncalcined would be. The
slaking releases large amounts of heat, and the slaked lime is caustic.
Slaked lime is fairly soluble and I suspect that it would produce a glaze
with a high shrinkage that would peel our crawl in the firing.
Louis
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