Paul Herman on fri 22 aug 03
Paul B,
The bad news is that it ain't gonna work well. Give or throw it away, or
change to cone 6 firing.
Get yourself some cone 10/11 clay and make the highfire stuff out of
that. Your time is valuable, and clay is (dirt) cheap.
Best wishes,
Paul Herman
Great Basin Pottery
423-725 Scott Road
Doyle, California 96109 US
potter@psln.com
> Hello,
> i have access to a lot of cone 6 porcelain that i want to fire to cone 11.
> Some of it is a pre-mixed body still in the powder form in a large trash
> can, and some is wet and being slaked down in another large can. I want to
> turn it into something more workable than porcelain and raise the temp by
> adding dry ingredients to it using a clay mixer. I know of one person who
> did this by adding ball clay. I was wondering if anyone else has done this
> and has some advice. I was also considering adding fire clay because i don't
> care if it is still true porcelain when i am done - i just want to make use
> of the stuff which has been sitting around in a friends studio for a
> decade -- and i want something easier to throw with and less cracking. any
> advice? thanks,
> Paul B
> Falmouth, KY
Paul on fri 22 aug 03
Hello,
i have access to a lot of cone 6 porcelain that i want to fire to cone 11.
Some of it is a pre-mixed body still in the powder form in a large trash
can, and some is wet and being slaked down in another large can. I want to
turn it into something more workable than porcelain and raise the temp by
adding dry ingredients to it using a clay mixer. I know of one person who
did this by adding ball clay. I was wondering if anyone else has done this
and has some advice. I was also considering adding fire clay because i don't
care if it is still true porcelain when i am done - i just want to make use
of the stuff which has been sitting around in a friends studio for a
decade -- and i want something easier to throw with and less cracking. any
advice? thanks,
Paul B
Falmouth, KY
Brant Palley NMCLAY.com on sun 24 aug 03
You can add around 20 to 30% of some kind of fireclay or stoneware clay
like Goldart or hawthorn bond or whatever is cheaper locally. It is best
to test different amounts, and clays. Most cone 6 porcelains have around
40 to 50% flux; you need to get that percentage down to 25% for cone 11.
Brant Palley
New Mexico Clay
1-800-781-2529
1-505-881-2350
www.art-clay.com
www.nmclay.com
www.Silver-Clay.com
www.DuncanPaintStore.com
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