Taty on fri 26 nov 99
Dear Clayarters,
In your glaze recipes, has anyone tried substituting finely ground
eggshells for calcium (and/or phosphorus?)? Has anyone got the exact
chemical constituents of eggshells for formulas? Have any ancient potters
used these?
Thanks a lot for your answer,
Regards
Taty
Burt Cohen on sun 28 nov 99
Yes, Taty I have made up glazes using eggshell. A long time ago in a
workshop where I trained we had one glaze quite hot as I recall, (cone 10)
which was equal parts calcined egg shell and seashell, I think with a small
part of wood ash (maybe 10%) thrown in for good measure.
Good luck-
Burt Cohen
-----Original Message-----
From: Taty
To: CLAYART@LSV.UKY.EDU
Date: Friday, November 26, 1999 12:11 PM
Subject: glazes substitution: egg shells as calcium
----------------------------Original message----------------------------
Dear Clayarters,
In your glaze recipes, has anyone tried substituting finely ground
eggshells for calcium (and/or phosphorus?)? Has anyone got the exact
chemical constituents of eggshells for formulas? Have any ancient potters
used these?
Thanks a lot for your answer,
Regards
Taty
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