Environmental friendly lead-free glass is the best material for making a watch glass, which is reusable, non-toxic, and easy to clean; featuring a smooth surface and high degree of transparency. note: cannot be heated directly.
They not only can be used for vaporizing liquid, but also can be used as a lid for other chemical containers.
| Material | optical glass,BK7 ,Fused silica, JGS1,JGS2,JGS3,Low iron glass,soda lime glass,borofloat 33(BF33) |
| Diameter | 1-500mm |
| Thickness | 0.1-50mm |
| Diameter Tolerance | ±0.01 mm |
| Thickness Tolerance | ±0.01mm |
| Surface Quality | 80/50,60/40,40/20,20/10 |
| Clear Aperture | >90% |
| parallelism | <3 arcmin |
| Coating | Custom |
| Bevel | 0.1~0.3mm x 45 degree |