Cindy Strnad on thu 8 jun 00
Renate,
Sorry to be uninformed here, but what is "intumescence"? And what is the
firing cone and atmosphere for this glaze? Thanks,
Cindy Strnad
earthenv@gwtc.net
Earthen Vessels Pottery
RR 1, Box 51
Custer, SD 57730
Reg Wearley on thu 8 jun 00
Hi Renate-
At what cone are you using this glaze?
--Reg Wearley
--- Renate Schmidt wrote:
> Hello Tom and Jeff,
> I know it took a long time but it is exams time here
> in Sydney.O.K. here is
> the new recipe
>
> borax 40
> lithium carbonate 10
> kaolin (ekalite) 10
> bone ash (synthetic) 10
> magnesium carbonate(heavy) 30
> expandet perlite fines 2
>
> Interestingly the perlite caused a rapidly
> expandet"doughy" surface,due to a
> property known as intumescence,at 1000 C. I know
> that perlites are a type of
> ryolite- a rapidly cooled form of granite rock- does
> anyone know what might
> case this "intumescence"?
>
> I am getting better at typing as well
> love renate
>
>
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Renate Schmidt on thu 8 jun 00
Hello Tom and Jeff,
I know it took a long time but it is exams time here in Sydney.O.K. here is
the new recipe
borax 40
lithium carbonate 10
kaolin (ekalite) 10
bone ash (synthetic) 10
magnesium carbonate(heavy) 30
expandet perlite fines 2
Interestingly the perlite caused a rapidly expandet"doughy" surface,due to a
property known as intumescence,at 1000 C. I know that perlites are a type of
ryolite- a rapidly cooled form of granite rock- does anyone know what might
case this "intumescence"?
I am getting better at typing as well
love renate
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