technical specification :
1. SiO2 – 43.62
2. AL203 – 37.06
3. FE203 – 1.72
4. TiO2 - traces
5. CaO – 2.04
6. MgO - traces
7. K20 – 0.20
8. Na2O - 0.11
9. MnO2 - traces
10. Loss On Ignition – 15.84