Ian Macmillan on sun 9 may 99
Is anyone able to provide me with the ratios for substituting among cobalt
oxide, cobalt carbonate, and cobalt silicate?
BTW - thanks to all who replied about the glaze database _ I knew about the
SDSU database, but just wondered if Alfred had their own. It does make
sense to coordinate it in one place.
Thanks
Ian
William Hewlett on mon 10 may 99
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If you have cobalt carb. and the glaze calls for cobalt ox. divide the
amount by two and add half the amount of cobalt carb to the amount called
for. For example if it calls for 10 grams of cobalt oxide, divide that by
two, which is five, and add it to the ten, giving you 15. and that is what
you would use to substitute the cobalt oxide with carbonate.
Joyce A
Marty Anderson on tue 11 may 99
I have always substituted carb for ox by using half the amount of oxide.
Have not noticed that it was any different than having used the amount of ox
called for in the recipe.
marty
-----Original Message-----
From: William Hewlett <105335.63@compuserve.com>
To: CLAYART@LSV.UKY.EDU
Date: Monday, May 10, 1999 9:00 AM
Subject: interchanging cobalt compounds
----------------------------Original message----------------------------
------------------
If you have cobalt carb. and the glaze calls for cobalt ox. divide the
amount by two and add half the amount of cobalt carb to the amount called
for. For example if it calls for 10 grams of cobalt oxide, divide that by
two, which is five, and add it to the ten, giving you 15. and that is what
you would use to substitute the cobalt oxide with carbonate.
Joyce A
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