gerstly borate how much before trouble?
Posted 28 January 2013 - 09:36 AM
I have been having some pitting issues, and have been through the standard treatments, soaking longer, thinner application, firing hotter, bisquing hotter, no changes. Then a potter suggested that the gerstly borate in the glazes might be the issue.
Do any of you smart glaze folks have anything to offer on this subject? What percentage of GB can a glaze have before the pitting problem comes up? Is the substitute for it, Gelespie B, equivalent in the mix, or will it produce a different glaze?
Posted 28 January 2013 - 02:44 PM
Have you considered dust particles? I sand my pots, then I bisque. After the bisque there is dust on the pots. I dip them in a 5 gallon pail of water. Let dry over night. Then you are ready to go.
Posted 28 January 2013 - 06:57 PM
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Professor of Ceramics; New Hampshire Insitute of Art