michael on sat 25 dec 99
Veena,
Sorry about the pun. I've found that warping comes from a
disturbance of the shape. As in when a bowl is removed from the wheel
and the lip moves, even slightly, it is a sure thing that the finished
bowl will be warped. Your "L" shaped bookends have a tall vertical and
a shorter base/horzontal, right? Have you tried forming your bookends
on plaster bats ie. rolling the slabs out on the plaster then putting
them together with the short end in the vertical position? Handling
pieces a great deal before they become leather hard tends to distort
their shape. Also in the latest Ceramics Monthly the potter who makes
the large bowls lays out very large slabs, cuts the circumference then
cuts and leaves in place a larger ring to retard over drying of the
rim. He also leaves the work in their forms throughout the making
process. I use double knit polyester over my slabs but I make vessels
with added sections that are usually not larger than a few inches. Any
warping is disguised by the textures I add to the work. Good Luck,
Mike Porfido
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