I. Application
Mainly used in infrared heating field, stage lights and so on.
II. Product Features
A kind of transparent quartz glass, doping in the WQ181 type materials on the basis of adding several kinds of trace elements, after the melting method to produce red transparent quartz tube, with smooth surface, bright color evenly, can stop all uv rays and part of visible light and make full use of the infrared, the effect of hot working performance.
III. Product Type
WQPQ771，Ruby Clear quartz tube
IV. Typical Size
| OD Range | ODTolerance | WallThickness | WTTolerance | Out ofRound | Siding | Bow |
| 3＜Ф≤10 | ±0.1 | 1～2.0 | ±15% | 2% | 12% | 0.15% |
| 10＜Ф≤20 | ±0.2 | 1～2.5 | ±20% | 1.25% | 12% | 0.15% |
| 20＜Ф≤30 | ±0.25 | 1.5～3.0 | ±20% | 1.25% | 12% | 0.15% |
V. Physical and Chemical Properties
i. Mechanical and Thermal Properties
| Density（20℃kg/m3） | Thermal Expansion（200-300℃℃-1） | Softening Point（℃） | Annealing Point（℃） | Strain Point（℃） |
| 2.1*103 | 5.8*10-7 | 1620 | 1160 | 1060 |
ii. Impurity Value
| Al | Fe | K | Na | Li | Ca | Mg | Cu | Mn | Cr | Ni | Ti | Ba |
| 20 | 1.5 | 5 | 5 | 1 | 3 | 1 | 0.5 | 0.5 | 0.5 | 1 | 3 | 0.5 |
iii. OH Content
| Typical Value without Baking | After baking |
| 70 | ＜10 |
iv. Optical Properties
