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  1. slab warpage

    Posted 1 Nov 2012

    Hi,

    A friend and I share a kiln together. She is having problems with warping in the bisque.

    Clay body - Tacoma Clay Art paper clay
    firing - ^06 using the Skutt firing schedule
    Thickness - 1/4/ to 1/2 ins.
    Tossed and rolled with a rolling pin
    Design made on drying board
    Dried to soft leather hard then: either a second sheetrock board is put in top or weights put on the 4 corners
    At leather hard put in a convection oven. on the oven racks and dried for 12 hr at 170 F
    Placement in kiln - larger pieces stacked flat on the top shelves, spanned the kiln shelves these had the most warpage
    smaller pieces stacked leaning against the shelf
    the smaller pieces stacked flat on the bottom shelf seems to have the least warpage


    These forums are so great. Thanks for all your help

    acg

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