SF325: Fe3O4 content ≥%                      80-90, Water, ≤%0.5, Water-soluble matter≤%1, Sieve residue (325 mesh)%0.3, Oil Absorption (ml/100g)12-18, PH5-8, 105 ℃ Volatile Content 1

SF400: Fe3O4 content ≥%                      80-90, Water, ≤%0.5, Water-soluble matter≤%1, Sieve residue (325 mesh)%0.7, Oil Absorption (ml/100g)12-18, PH5-8, 105 ℃ Volatile Content 1

SF500: Fe3O4 content ≥%                      80-90, Water, ≤%0.5, Water-soluble matter≤%1, Sieve residue (325 mesh)%1, Oil Absorption (ml/100g)15-25, PH5-8, 105 ℃ Volatile Content 1

SF600: Fe3O4 content ≥%                      80-90, Water, ≤%0.5, Water-soluble matter≤%1, Sieve residue (325 mesh)%2, Oil Absorption (ml/100g)15-25, PH5-8, 105 ℃ Volatile Content 1

SF800: Fe3O4 content ≥%                      80-90, Water, ≤%0.5, Water-soluble matter≤%1, Sieve residue (325 mesh)%3, Oil Absorption (ml/100g)15-25, PH5-8, 105 ℃ Volatile Content 1