鋁≥24.75%,鐵≤0.75%,燒白≥81.9,濕白≥62.2
讚砂 矽≥72.87%,鋁≥16.43%,鐵≤1.32%,鈦≤0.07%,鈣≤0.03%,鎂≤0.03%,鉀4.25%左右,鈉≥0.66%左右,燒失≤4.28%,總量≥99.94,白度≥42.5/20.9,收縮≤4.8%《精準化驗》