Complaint
| No. | glass tube (Composition) | Tolerance | ||
| 1 | Density | g/cm3 | 2.48g/cm3 | |
| 2 | Coefficient of expansion (20ºC~300ºC) | 10-7K-1 | 91.5×10-7 | +/-1.5 |
| 3 | Softening point | ºC | 690 oC | +/-15 |
| 4 | SiO2 | Wt.% | 71.5 | +/-1.0 |
| 5 | Al2O3 | Wt.% | 2.80 | +/-0.3 |
| 6 | Na2O | Wt.% | 15.20 | +/-0.5 |
| 7 | K2O | Wt.% | 1.2 | +/-0.2 |
| 8 | B2O3 | Wt.% | 1 | +/-0.2 |
| 9 | MgO | Wt.% | 2.8 | +/-0.4 |
| 10 | BaO | Wt.% | ≤0.5 | |
| 11 | CaO | Wt.% | 5.0 | +/-0.5 |
| 12 | Fe2O3 | Wt.% | ≤0.25 | |
| 13 | LiO | Wt.% | ≤0.3 | |
| 14 | Others | Wt.% |
