Properties of Trivex® compared to other materials
| |
Trivex |
CR39 |
Poly |
Mid Index |
Hi Index |
| Abbe |
43-45 |
58 |
29 |
34-41 |
32-41 |
| Scratch resistance |
0.4 |
1.0 |
0.2 |
0.3-0.5 |
0.5 |
| FDC Impact resistance |
Pass |
Fail |
Pass |
Fail |
Some pass |
| Specific gravity |
1.11 |
1.32 |
1.22 |
1.20-1.34 |
1.30-1.40 |
| Refractive index |
1.53 |
1.50 |
1.59 |
1.53-1.57 |
1.59-1.71 |
| Chemical resistance |
Good |
Good |
Poor |
Good |
Good |
| Surfacing |
Good |
Excellent |
Poor |
Good |
Good |
| Tint rate |
Very fast |
Fast |
Non-tintable |
Average |
Fast |
| Typical Centre Thickness |
1.0 |
2.0 |
1.5 |
1.5 |
1.5 |
Acknowledgements to Younger Optics for the information above.
