Ababi Sharon on tue 13 mar 01
>From: Alisa og Claus Clausen
>Reply-To: Ceramic Arts Discussion List
>To: CLAYART@LSV.CERAMICS.ORG
>Subject: Sv: spitting glaze
>Date: Tue, 13 Mar 2001 09:57:18 +0100
>
>I am wondering about your colemanite. I noticed that many, many of the
>tests I made where I subbed colemanite for Gerstely Borate, also left halos
>around the test bowls, and some of them really spit.
Hello Alisa!
Colemanite is different from one bag to the next one.
If colemaite wwas so great no one would try so hard to find an artificial
substiute for the G.B.( that was substitute for the colemanite). I tried to
calcin the colemanite, this evil material, to 210C,to get rid of the gipsum,
no higher as the B2O3 might melt.It will not take long untill your happy day
will come that you wil have to screch well your shelves and if this day will
not come,I am happy for you, and jeelous!
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