Appearance

Super-fine Powder

Super-fine Powder

Micro pearl

Heating loss (105°C) %

≤ 5.0

≤ 5.0

≤ 5.0

Loss on ignition (1000±25°C)%

≤ 8.5

≤ 8.5

≤ 8.5

DBP Oil Absorption Value cm³/g
 

1.8-2.8

2.8-3.5

2.0-3.0

Silica(dry basis)%

≥ 96

≥ 96

≥ 96

PH-value(10%aqueous solution)

6.0-7.0

6.0-7.0

6.0-7.0

Heavy metal (Pb) mg/kg

≤ 30

≤ 30

≤30

As  mg/kg

≤ 3.0

≤ 3.0

≤ 3.0

Pb  mg/kg

≤ 5

≤ 5

≤ 5

Na₂SO₄ % 

≤ 4.0

≤ 4.0

≤ 4.0

Average grain diameter d50  µm

10-15

10-15

180-400