Item

index

TiO2 content,%(m/m) ≥

98.5

Whiteness(compared with first class standard

sample listed in GB1706-93)

No less than

Scattering power, %(compared with first class

standard sample listed in GB1706-93) ≥

102

Volatile matters at 105°C,%(m/m) ≤

0.5

PH value of water suspension

6.8~8.0

Oil absorption value ,g/100g ≤

22

Residue on the sieve (45um mesh),%(m/m) ≤

0.05

Electrical resistance of aqueous extract,Ωm ≥

22

Iron content ,ppm ≤

80

Water dispersible power,% ≥

75

Index controlled by the company Gardner of dry power

L ≥

100.0

b

0.20~-0.20