Custer Feldspar (NaKO.Al2O3.6SiO2 ) is a one of the primary feldspars used in ceramics. It is used in both clay (up to 25%) and glaze (up to 100%) formulas and is made up of silica and alumina combined with sodium and potassium oxides.

Custer feldspar is used in many industries -- in industrial ceramics, you will find custer feldpsars used in floor and wall tile fabrication, in mass-produced dinenrware and pottery, and electrical porcelain; additionally, it is also used in the abrasives industry.

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