Sodium Feldspar (N-01): K2O - 0.50% (+/-0.5%) SiO2 - 69% (+/-1%) Ai2O3 - 18% (+/-2%) Na2O - 10% (+/- 1%) Fe2O3 - 0.08% (+/- 0.05%) L.O.I - 0.10% Firing Result: Milky White Sodium Feldspar (N-02): K2O - 2% (+/-1%) SiO2 - 70% (+/-1%) Ai2O3 - 18% (+/-2%) Na2O - 8% (+/- 1%) Fe2O3 - 0.10% (+/- 0.05%) L.O.I - 0.20% Firing Result: White