石英砂(粉) ( % ) Igloss ( L.O.I ) ≤ 0.2% ≤ 0.2% SiO2 ≥ 98% ≥ 98% Fe2O3 ≤ 0.05% ≤ 0.15% CaO ≤ 0.1% ≤ 0.1% MgO ≤ 0.1% ≤ 0.1% K2O ≤ 0.1% ≤ 0.1% Na2O ≤ 0.1% ≤ 0.1% TiO2 ≤ 0.1% ≤ 0.1% 水份