lighting glass
Beijing Jiye Glass Co., Ltd. [China] 
Lead free glass tubing 1.OD: 6.0-18.0 2.Windage:plus-minus 0.2-0.35 3.Roundness:less than0.2
Property
| Chemical & Physical Property | Data |
| Soften Point | 675±10°C |
| Annealing Point | 485±10°C |
| Heat Stability | ≥120°C |
| When the Mass resistance is 100MΩ.cm,temperature of TK-100 | ≥240 |
| Density | 2.63±0.05 |
| Anti-water Class | Ⅲ |
| Thermal Expansion Coefficient | 9.2×10-7°C (25-380°C) |
| Strain Point | 455°C |
| Working Point | 1020°C |
| Melting Point | 1490°C |
| Specific Gravity | 2.62 g/cm3 (at 20°C) |
Chemical Composition
| SiO2 | 68 % |
| Al2O3 | 3.4 % |
| Na2O | 7 % |
| K2O | 5 % |
| BaO | 9 % |
Specification List
| O.D. | Windage | Roundness | D | Windage | Wall Windage | L | Camber |
| 6.0 | ±0.2 | <0.2 | 0.8 | ±0.05 | <0.10 | 1000 | <2 |
| 10.0 | 1.0 | ||||||
| 12.0 | |||||||
| 15.0 | ±0.3 | 1.2 | ±0.06 | ||||
| 18.0 | ±0.35 | 1.3 | ±0.08 |
lighting glass
