Level 1: Volume specific gravity ≧720 (g/L), water content ≦14%, incomplete content ≦4%, impurity content ≦1%
Level 2: Volume specific gravity ≧690 (g/L), water content ≦15%, incomplete content ≦6%, impurity content ≦1.5%
Level 3: Volume specific gravity ≧660 (g/L)
Level 4: Volume specific gravity ≧630 (g/L)
Level 5: Volume specific gravity ≧600 (g/L)