Gregory D Lamont on tue 19 jan 99
Dear Clayarters,
This is an inquiry for a potter friend not on Clayart. He makes his own
ceramic jars for his homemade ball mill. He is a fanatic for experimenting
with local clays and other materials and has been recently experimenting
with what he calls "glacial leavings" in glazes. Trouble is these
materials have been rapidly abrading up the glaze he uses to line the
inside his ball mill jars. He asked me to ask the list if anyone can
recommend a very strong, abrasion-resistant liner glaze he might use. Any
firing range or atmosphere is OK.
Thanks for your help.
Greg
Donn Buchfinck on thu 21 jan 99
Ball mill jars do not need a liner glaze
the balls and the glazes are grinding the glaze away from the jar
it's what it is supposed to do
In school we used a grolleg based porcelain for making the balls for the ball
mill
then we ground them in the mill with silica and water after we fired them to
smooth them down.
eventually the balls and the jar thin a little, but I think it would take some
years to do this.
a morter and pestle does not have glazes on the grinding surfaces
Donn Buchfinck
Louis Katz on thu 21 jan 99
Dear Greg,
I suspect that your friend is undercharging his mill.
If the mill is not full enough with balls they fail to tumble down over each
other and just run up the side of the mill and slide down the side of the
mill, abrading the mill rather quickly. Cardew (Pioneer Pottery) says your
mill should be at least half full of balls, and probably a little more.
Louis
PS Thanks for submitting you images to the NCECA World Contemporary Ceramic
Image Database. I should be adding some other browse functions soon, but at
the moment the Findall button works pretty well for browsing.
Louis
Gregory D Lamont wrote:
> ----------------------------Original message----------------------------
> Dear Clayarters,
>
> This is an inquiry for a potter friend not on Clayart. He makes his own
> ceramic jars for his homemade ball mill. He is a fanatic for experimenting
> with local clays and other materials and has been recently experimenting
> with what he calls "glacial leavings" in glazes. Trouble is these
> materials have been rapidly abrading up the glaze he uses to line the
> inside his ball mill jars. He asked me to ask the list if anyone can
> recommend a very strong, abrasion-resistant liner glaze he might use. Any
> firing range or atmosphere is OK.
> Thanks for your help.
> Greg
--
Louis Katz
lkatz@falcon.tamucc.edu
NCECA Director At Large
Texas A&M-CC Division of Visual and Performing Arts Webmaster (512) 994-5987
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