Ron Roy on mon 17 sep 01
One way of making very low expansion glazes is to use MgO as the main flux.
This "C10" glaze would have a very low expansion rate - a pot buster for
sure - try it as a liner glaze and tell us what happened.
If it was used as a vitrious slip at cone 6 I would expect the same kind of
I hate to contradict DH - he is such a wonderful person but I am counting
on his good nature to take this in the spirit it is given.
>An easy way to try using a slip-glaze is to buy (or make) some
>low-fire white casting slip. The typical recipe for such slips
>is 50% talc and 50% ball clay, plus a defloculant. At cone 10
>this slip will make a white low silica matt glaze. Add oxides to
>make colors; cobalt will produce purple because of the massive
>amount of magnesium in the slip.
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