Markings Chart | BS EN166 |
| Frame | Lens |
|
Optical Class: |
Refractive Tolerance + 0.06 dio |
| 1 |
Refractive Tolerance + 0.12 dio |
| 2 |
Refractive Tolerance + 0.12/-0.25 dio |
| 3 |
|
Mechanical Strength: |
Minimum Robustness- |
|
|
Increased Robustness (General Purpose) |
|
|
Low-Energy impact (Grade 2 – 125 ft/s) |
| S |
Medium-Energy impact (Grade 1 – 360 ft/s) | F | F |
High-Energy Impact (570 ft/s) | B A | B A |
|
Field of Use: |
Basic |
|
|
Liquids (chemical) | 3 |
|
Large Dust Particles (Dust) | 4 |
|
Gas and Fine Dust Particles (Gas) | 5 |
|
Short circuit Electric Arc | 8 |
|
Molten Metals and Hot Solids | 9 | 9 |
|
Optional Requirements: |
Resistance to Misting - |
| N |
Resistance to Surface Damage (Anti Scratch) |
| K |