Feldspar powder is a common raw material used in glassmaking, ceramics, extender in paint, plastics, and rubber. In glassmaking, alumina from feldspar improves product hardness, durability, and resistance to chemical corrosion. Please find the below parameter: Form - Powder Packaging Size - 50 Kg Packaging Type - HDPE Bag Color - Off White Appearance - fine white Tapped bulk Density - 0.90 - 1.10 g/ml Fe as Fe2O3 - 0.2% Max Silica - 65% Max Alumina - 21% Max Potassium Oxide - 12.0 - 12.6%