technical specification :
1. SiO2 – 56.2
2. AL203 – 30.3
3. FE203 – 1.5
4. TiO2 – 1.0
5. CaO – 0.56
6. MgO – 0.90
7. Na2O + K2O – 1.0
8. Loss On Ignition – 8.5