|
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 % |
|
|
|
