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Al2O3 (min.)

45-48%

44-47%

43-45%

42-44%

40-42%

Fe2O3 (max.)

1.00%

1.20%

1.50%

1.80%

2.00%

TiO2 (max.)

0.80%

0.80%

0.90%

1.00%

1.00%

CaO+MgO (max.)

0.50%

0.50%

0.50%

0.50%

0.60%

K2O+Na2O (max.)

0.30%

0.30%

0.40%

0.40%

0.50%

B.D. (min.)

2.60g/ccm

2.55g/ccm

2.53g/ccm

2.50g/ccm

2.48g/ccm