• Dec 13, 2025 glazes cone 6 1240 c 2264 f 1240 degrees c 2264 de shes. Crystalline Promoters: Like zinc oxide for crystalline effects. Surface Modifiers: To achieve specific textures or reductions. Firing Process for Cone 6 Glazes Preparation Bisque Firing: Usually, ware is bisque-fired at lower temperatures (e.g., cone 06 or 04) to remove moisture. By Miss Lilian King
