Jean Cochran on tue 19 dec 00
I regularly wad feet on plates and platters. Just press down lightly on
the piece. Too much pressure and the piece will conform to the shelf.
I put 6 to 8 pea size and shape wads. In addition to helping the
warping problem, it also gives some air flow under the piece and aids in
preventing cracking.
Good luck,
Jean Wadsworth Cochran (with a kiln load of plates firing in the cone
10/11 gas reduction kiln, will be up for a while)
Snail Scott on tue 19 dec 00
At 08:32 PM 12/18/00 -0800, you wrote:
>>Reading the thread about kiln shelves leads me to this
>>thought. If you put wadding under your bisque ware
>>when you glaze fire it, and the pieces sit on wadding
>>on a warped (slightly) shelf, will your work come out
>>warped or not? I am thinking not, since the wadding
>>serves to keep the pieces from sagging to the shape of
>>the shelf. Am I wrong?
>>
>>Joan in cold windy concrete Brooklyn
>>
Wadding does not prevent warping, it prevents sticking.
Why should firing on little 1/4" lumps of wadding cause
less warping than firing on a shelf with a 1/4" wiggle?
If the clay is prone to warping, it will warp to the
wadding lumps as readily as to the shelf shape. It
would need to be quite evenly supported to prevent this,
either on a ring of wadding or a sturdy small slab of
clay.
Smaller feet help, too. Less exposure to the full extent
of the shelf warp, and structurally more 'self-reinforced'.
-Snail
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