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Posted by Dewitt on April 9, 2007, 10:51 am
Please log in for more thread options wrote:
>Hi Everyone,
>I fired a piece of Laguna Frost cone 6 porcelain using my regular cone
>6 stoneware glaze and the glaze ran. It doesn't on stoneware. Does
>anyone know if there is something about porcelain that would cause a
>glaze to run? It was the first time I fired porcelain. Do you have
>to use a different formula glaze even though it's a cone 6 porcelain?
>My glazes are rated cone 5-6.
>Thank you for any help on this issue.
>Sandi
Someone else will have to explain the chemistry of it, but I've seen
warnings before not to use a particular glaze on porcelain due to
running. My guess is that the flux in the porcelain can result in
additional fluxing of the glaze, so a glaze that is fairly fluid on
stoneware becomes even more so on porcelain.
deg
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