G2916F

Draft

Description

G2916F is a high-durability, clear dinnerware glaze formulated for Cone 6 oxidation firing. It is characterized by high SiO2 and Al2O3 content with a low-boron flux profile, utilizing a blend of CaO,

Original Author

Tony Hansen

Usage Instructions

G2916F is a high-durability, clear dinnerware glaze formulated for Cone 6 oxidation firing. It is characterized by high SiO2 and Al2O3 content with a low-boron flux profile, utilizing a blend of CaO, KNaO, MgO (from talc), SrO, and BaO to achieve excellent melt stability and surface hardness. Preparation requires screening at 80 mesh to remove agglomerates. It is recommended to use 325 mesh silica and A400 nepheline syenite to minimize the coefficient of thermal expansion and optimize melting. For optimal slurry consistency, target a specific gravity of 1.5; add a flocculant such as Epsom salts if increased viscosity is required. This glaze is chemically compatible with most Mason stains; however, inclusion stains should be monitored for bubbling at Cone 6. When used as a base for colorants, note that certain stains may alter the melt flow. G2916F exhibits moderate porosity at bisquing temperatures (1800°F); ensure ceramic ware is adequately bisqued above 1800°F to prevent pinholing and blistering from outgassing during the glaze firing.