| Model | BT-1 | BT-2 | BT-3 |
| Bi2O3 | Adjustble | Adjustble | Adjustble |
| TiO2 | Adjustble | Adjustble | Adjustble |
| Fe2O3 | 0.01% max | 0.1% max | 0.5% max |
| K2O+Na2O | 0.01% max | 0.1% max | 0.5% max |
| PbO | 0.01% max | 0.1% max | 0.5% max |
| SiO2 | 0.01% max | 0.1% max | 0.5% max |
| Lead Tungstate | Cesium Tungstate | Calcium Tungstate |
| Barium Tungstate | Zirconium Tungstate |
| Cerium Vanadate | Calcium Vanadate | Strontium Vanadate |
| Lead Stannate | Copper Stannate |