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More about eye protection

Sketch of the marking of frames

Marking of frames

(a) Manufacturer
(b) EN standard number
(c) Suitable areas of application
No marking = basic use (glasses)
3 = Liquids (goggles, visor)
4 = Dust particles > 5 μm (goggles)
5 = Gas and small dust particles < 5 μm (goggles)
8 = Short circuit electric arcs (visor)
9 = Molten metal and hot material (goggles, visor)
(d) Mechanical resistance
S = Enhanced strength
F = High speed, low-energy impact (6 mm steel ball at 45 m/s)
B = High speed, medium-energy impact (6 mm steel ball at 120 m/s)
A = High speed, high-energy impact (6 mm steel ball at 190 m/s)
Marking “T” after the symbol for mechanical resistance indicates protection at extreme temperatures (FT, BT, AT)
(e) H = suitable for small head shape
(f) Highest shade number compatibility with the frame
Sketch of the marking of lenses

Marking of lenses

(a) Filter Type
2 or 2C = UV
4 = IR
5 or 6 = Sun filter
(b) Shade number (Without filter type number = weld filter)
(c) Manufacturer
(d) Optical class
1 = Permanent use
2 = Temporary use
3 = Used in exceptional cases
(e) Mechanical resistance (See marking of frames)
(f) Other requirements
8 = Short circuit electric arcs (visor)
9 = Molten metal and hot materials (goggles and visor)
K = Resistance to surface damage by fine particles
N = Resistance to misting
R = Enhanced reflection factor
Table of the marking of framesTable of the marking of lenses

Test methods for eye protection

Mechanical test according to EN 166 (Enhanced strength) is performed, among others, through a 22 mm diameter steel ball being released on the glass at a speed of 5.1 m/s. “S” specifies that this test has been carried out.

Additional test for protection to withstand high-velocity particles

A 6 mm diameter steel ball is used and is fired at the protective glass.
Low energy impact 45 m/s is marked with “F”. (Glasses, Goggles, Visors)
Medium energy impact 120 m/s is marked with “B”. (Goggles, Visors)
High energy impact 190 m/s is marked with “A”. (Visor)
Optical test
The optical quality of eye protection is divided into 3 classes. Lenses are marked 1, 2 and 3.
Class 1 is the best class with regard to optical properties.

Welding marking
EN standards

Standard Description
EN 166 Eye protection, requirements and specifications
EN 167 Eye protection, optical test methods
EN 168 Mechanical tests Describes the different mechanical testing methods in accordance with the requirements in EN 166 and other standards for eye protection.
EN 169 Eye protection, welding filters
EN 170 Describes filter requirements for UV radiation
EN 171 Describes filter requirements for IR radiation
EN 172 Sunglasses for professional use, even with glare
EN 175 Eye and face protection during welding
EN 207/208 Filters against laser radiation/Filter for the adjustment of the laser.
EN 379 Eye protection, welding filter with automatically darkening welding glass (switchable luminous flux transmittance or double luminous flux transmittance).
EN 1731 Eye and face protection with wire mesh against mechanical hazards and/or heat for professional use or other uses.
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Skydda PPE AB, Att: Zekler

Vistaforsvägen, 523 85 Ulricehamn, Sweden

Phone: +46-321-67 73 00. Fax: +46-321-67 72 96

E-mail: info@zekler.com