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Sunday 18th November 2018 21:31PM GMT

Eyewear Safety Standards

EN 166: Personal eye protection
Eye-protection equipment is marked with a series of numbers and/or symbols according to the field of use, the protection capabilities and performance characteristics of the eye-protector. (Note : where the lens and the frame form a single unit, e.g. cover-spectacles, goggles, all markings are on the frame. The marking relative to lens precedes the marking relative to the frame and the markings are separated by a hyphen. In this case the manufacturers identification mark is not repeated in the marking.)

Example of Marking
Lens marking: 1 F CE
Frame marking: EN166 - F

3 Code Number:
2 UV filter where colour recognition may be affected. EN170.
3 UV filter with good colour recognition. EN170.
4 IR filter. EN171.
5 Sunglare filter (without infra red specification). EN172.
6 Sunglare filter (with infra red specification). EN172.

1.2 Shade Number:
Guidance is given in European standard EN169, 170, 171, 172.
Code number + shade number = scale number.
UV = ultra violet / IR = infra-red.
Manufacturers identification mark.
1: Optical class (1, 2 or 3). The lower the number the higher the optical quality.
F, -F: Mechanical strength.
S: Increased robustness.
F, -F: Low energy impact of high speed particles.
B, -B: Medium energy impact of high speed particles, (goggles or face shields only).
A, -A: High energy impact of high speed particles, (face shields only).

Other markings which may appear on lenses and/or frames:
K: Resistance to surface damage by fine particles.
N: Resistance to fogging.
4: Liquids. For liquid droplets use goggles only, for liquid splashes use face shields only.
5: Large dust particles, (>5 microns). Goggles only.
6: Gasses, vapours, sprays, smoke and fine dust particles (<5 microns) Goggles only.
7: Short circuit electric arc. Face shields only.
8: Splashes of molten metals and preparation of hot solids. Goggles or face shields only.

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