Phil Smith on mon 23 sep 02
Hello All,
The following recipe is for cone 9 reduction.
Custer: 40
silica: 30
Whiting: 20
EPK: 10
RIO: 5
Rutile: 3
Can anyone tell me how to tweak the chemistry
to allow for firing to cone 10-11.
Thanks.
Phil Smith:
WHC228@AOL.COM on mon 23 sep 02
Phil
Sorry I didn't see your second post. It works at cone 10/11.
Bill
Ron Roy on thu 26 sep 02
Hi Phil,
It may work just the way it is but you can increase the alumina and silica
to see if you like it better - the original has quite a high expansion rate
so it's going to craze on a lot of bodies - adding alumina and silica in
the right proportions to maintain the si/al ratio will help with the
crazing.
Every time you increase the EPK by 1.5 you have to increase the silica by
2.5 to maintain the same ratio - this is a shiny glaze by the way - the
ratio of the original is 9.94.
RR
>Hello All,
> The following recipe is for cone 9 reduction.
>Custer: 40
>silica: 30
>Whiting: 20
>EPK: 10
>RIO: 5
>Rutile: 3
>
>Can anyone tell me how to tweak the chemistry
>to allow for firing to cone 10-11.
>Thanks.
>Phil Smith:
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
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