Specifications : Parameters :- Super Grade : A – Grade : B-Grade Na2O :- 9.5 – 10.5%; 8 – 9 %; 6 - 8 % K2O :- 0.50 %; 0.5 - 1 %; 3 – 5 % SiO2 :- 66– 68%; 66 – 69 %; 68 – 71 % Al2O3 :- 16 - 19%; 16 - 18 %; 15 – 17% Fe2O3 :- 0.05 – 0.10 %; 0.10 – 0.15 %; 0.10 – 0.20 % CaO :- 0.50 %; 0.50 – 0.80 %; 1 – 1.5 % LOI :- < 1% ; < 1%; < 1% Powder : Mesh Size: 80/ 100 ; 200/240; 300/325 Uses: Sodium Feldspar is used for Frits , Ceramic, Glazes, Sanitary Ware, Tableware, Glass, Pottery etc.