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