Whiteness

96 %  – 94 %  – 92 % – 91 %  – 88 %

Type

Talc Powder

Size  – Fineness

5 Micron  – 8 Cm

SIO2

50% – 60%

MgO2

28% – 34%

Fe2O3

0.52 %

CaO

0.4 % Hardness 1 (Mohs)

LOI

3.5  – 7 MAX

OIL ABSORPTION

35 MAX

Solubility (in water)

0.5% MAX

Solubility (in HCL)

5% MAX

Bulk density (tapped)

0.40 – 90 gm /cc

Chloride

150 –  250 ppm MAX

Acid Soluble substance

1.5 – 2.0 % MAX

Specific Gravity

2.6 (Helium Displacement)

Reflectance

>65 (Opacity Reflect meter)

Refractive Index

1.58

Ph (10% aqueous suspension)

7 – 10 %