燒1200℃白度83.5,含鋁>37%
鋁(Al2O3)36.31%,鐵(Fe2O3)0.95%,白度80,燒失量14.02%,強度5.9%
鋁(Al2O3)含量36.31%,鐵(Fe2O3)含量0.95%,燒失量14.02%,白度83.4