Transparent dark-shaded glass tube, translucent with a glossy finish, creating a luxurious interplay of light, unlike typical opaque black. High fire-resistant grade (COE 3.3). Made from genuine borosilicate glass, resistant to thermal shock, and can withstand high-intensity flames from an Oxygen-Propane torch without cracking.
Hollow tubing with a diameter of 1.5 inches, making it easy to blow, expand, shape, or draw out. Suitable for functional glass art, large jewelry pieces, and modern design lamps.
Main Chemical Composition
- SiO₂ (Silica): 80% ±0.5
- B₂O₃ (Boron Trioxide): 13% ±0.2
- Al₂O₃ (Aluminum Oxide): 2.4% ±0.2
- Na₂O + K₂O: 4.3% ±0.2