Phil Smith on mon 23 sep 02
The following recipe is for cone 9 reduction.
Can anyone tell me how to tweak the chemistry
to allow for firing to cone 10-11.
WHC228@AOL.COM on mon 23 sep 02
Sorry I didn't see your second post. It works at cone 10/11.
Ron Roy on thu 26 sep 02
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
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.
> The following recipe is for cone 9 reduction.
>Can anyone tell me how to tweak the chemistry
>to allow for firing to cone 10-11.
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