Bill Merrill on sun 13 jun 10
Since the subject is sand in clay bodies....Paul Soldner used silica
sand, talc and fire clay for his stoneware body in his earlier years of
potting and never had problems with either sand or talc in his stoneware
body. He used Lincoln Fire clay in both his stoneware body as well as
his raku body. The amount of talc was reduced when using talc in his
stoneware body. I have fired his raku body to cone 10 in reduction and
the results were
extremely vitreous and blonde colored. I personally would not use his
raku body for stoneware. My clay body has talc as a flux and has never
dunted, shivered etc on one of my pieces. I do use spar as a flux
instead of talc when salt firing. If talc bodies are fired in salt the
result is a more mat surface because of the MGO in the talc. It has a
nice look if silica sand is used as the clkay body is darker and the
sand sometimes is revealed on the clay surface. If I want a more
"Shigiraki" fell to a piece I wedge in a feldspar I hammer mill to a
size I want. I use a spar I mine in Wyoming. =3D20
=3D20
Bill
=3D20
Lee Love on tue 15 jun 10
My last visit to MacKenzie's, he was cleaning up in his studio. Had a
bucket of molochite he didn't have a use for. Will try it in light
clay for texture and dark clay for contrasting speckles.
--
Lee, a Mashiko potter in Minneapolis
http://mingeisota.blogspot.com/
=3D93Observe the wonders as they occur around you. Don't claim them. Feel
the artistry moving through and be silent.=3D94 --Rumi
douglas fur on tue 15 jun 10
Bill
"He used Lincoln Fire clay in both his stoneware body as well as
his raku body. "
Being a west coast potter I grew up using bodies based on Lincoln Fireclay,
not knowing the formula came from PS but was just how we made clay.
I Used talc in a ^5 body. it seemed more durable than the same fluxed with
spar. It had the soul flaw of not getting along with a favortite copper
green which had Lithium Carb in it. The glaze, which was fine on a spar
fluxed body ( a clear dark green) went to a scummy surface matte and the
pots cracked in cooling.
I went back to a spar fluxed body but the talc body pots I kept lasted alot
longer.
DRB
Seola Creek
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