Our borosilicate glass tubing has snap cut ends, meaning the edges can be very sharp and uneven. The glass tubing is basically scored with a file and then 'snapped' between the thumb and forefinger leaving an edge that is rough.
Fire polishing is when the ends of the glass tubing are heated to create a smooth rounded finish that is not sharp at all.
- Strain temperature: 520°C (approx)
- Annealing temperature: 550ºC (approx)
- Softening temperature: 820ºC (approx)
- Co-efficiency of expansion: 3.3 (3.3士0.1*10-6/K)