Marcia Selsor on tue 19 feb 08
Dear Tom,
I fire my raku slabs vertical in an electric. I have been using paper
clay.
I cushion them on the shelf with a bit of fiber. I also lean them
against stacked shelves in the center of my kiln
cushioning again with fiber.
I stack two at a time with fiber spacers ib between. My largest slabs
are about 25 x 20-22.
I have a big oval kiln. From the smaller ends of the kiln I stack
against the edge of insulating bricks as opposed to the stacked shelves.
If they still slump, make them thicker. I support the slab about 2/3s
up the slab against the shelf.
Marcia
>
>
>
> The general question that I would like suggestions on is a problem
> that I am
> having firing large slabs. I wish to make a set of slabs about 20 x 25
> inches in size. I've been using paper clay and get them dried
> without much
> warping but when I fire them [lying flat], I get an inordinate
> amount of
> cracking; when fired upright they slump. Does anyone have any
> suggestions.
> Thanks.
>
>
> Thomas Sawyer
Marcia Selsor
http://marciaselsor.com
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