| Inkomba | Iyunithi | Idatha |
| I-Al2O3 | % | ≥65 |
| Fe2O3 | % | ≤1.6 |
| Ivolumu ye-Pore | % | ≤24 |
| Amandla acindezelayo | kg/cm2 | ≥ 900 |
| I-Refractoriness | ℃ | ≥1800 |
| Ukuminyana ngobuningi | kg/m3 | ≥1386 |
| Amandla adonsela phansi athize | kg/m3 | ≥2350 |
| I-Refractoriness ℃ ngaphansi komthwalo we-2kg/cm2 | ℃ | ≥1500 |
| LOI | % | ≤0.1 |