Janet H Walker on tue 24 nov 98
I want some really pretty thin slabs and was thinking of just
pouring a thin thin layer of some casting slip on some plaster that
has a very slight indentation the right shape and letting it set up.
Will "slabs" made like that fire flat? Would they fire over bisque
molds and slump into the shape? Or am I dreaming?
(Oh yes, cone 6. And I'm using commercial Miller white stoneware
casting slip.)
Thanks for any thoughts or reports of experience on this question.
Jan Walker
Cambridge MA USA
Dannon Rhudy on wed 25 nov 98
I have seen people make cast slabs that
ranged from almost paper thin to perhaps
an eighth of an inch, depending upon what
they wanted them for. They fired pretty flat
when desired. All the ones I've seen were
made with porcelain slip, with paper or nylon
fiber. I've no doubt such thin pieces would
slump if placed over a form for firing. You could
try it and let us know.
Personally, I've made thin sheets of porcelain,
using slip and nylon fiber, and fired them flat
on kiln shelf to cone 10. They stay flat, are
a bit fragile, but make remarkable drawing surfaces.
I brushed the shelves with a mixture of alumina and
very fine round white sand and placed the slabs on
there while they were about leather hard. The nylon
kept them in one piece for handling. The sand - or
maybe the kiln gods - let them shrink and move during
firing.
Dannon Rhudy
potter@koyote.com
At 09:50 AM 11/24/98 EST, you wrote:
>----------------------------Original message----------------------------
>I want some really pretty thin slabs and was thinking of just
>pouring a thin thin layer of some casting slip on some plaster that
>has a very slight indentation the right shape and letting it set up.
>Will "slabs" made like that fire flat? Would they fire over bisque
>molds and slump into the shape? Or am I dreaming?
>
>(Oh yes, cone 6. And I'm using commercial Miller white stoneware
>casting slip.)
>
>Thanks for any thoughts or reports of experience on this question.
>Jan Walker
>Cambridge MA USA
>
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