
| SG-6775 | Approximate comp. |
| SiO2 | 60.00% |
| CaO | 8.00% |
| K2O | 3.50% |
| Na2O | 1.50% |
| MgO | 6% |
| Al2O3 | 17% |
| BaO | 4% |
| SP-6525 | Approximate comp. |
| Na2O | 1.00% |
| K2O | 4.50% |
| MgO | 1% |
| CaO | 6.80% |
| ZnO | 8% |
| Al2O3 | 21% |
| B2O3 | 9% |
| SiO2 | 48.70% |
| SP-6514 | Approximate comp. |
| Na2O | 1% |
| K2O | 5.60% |
| MgO | 1% |
| CaO | 14.50% |
| SiO2 | 66.60% |
| Al2O3 | 10.50% |
| BaO | 0.50% |