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Eyewear


The general standard applicable to protective eyewear is the EN166 standard (Personal eye protection, specifications. It provides, inter alia, for the mandatory marking of the temples and lenses. This standard (together with the EN168) also provides for mechanical equipment resistance tests.The general standard applicable to protective eyewear is the EN166 standard (Personal eye protection, specifications. It provides, inter alia, for the mandatory marking of the temples and lenses. This standard (together with the EN168) also provides for mechanical equipment resistance tests.

 

 

 

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 STANDARDS  DESIGNATION
 en165 Personal eye-protection -Vocabulary.
 en166 Personal eye-protection - Specifications.
 en167 Personal eye-protection - Optical test methods
 en168 Personal eye-protection - Non optical test methods.
 en169 Personal eye-protection - Filters for welding and related techniques. Transmittance requirements and recommended utilisation.
 en170 Personal eye-protection - Ultraviolets filters
 en171 Personal eye-protection - Infrared filters –
 en172 Personal eye-protection - Sunglare filters for industrial use.
 en172a1 Personal eye-protection - Sunglare filters for industrial use.
 en172a2 Personal eye-protection - Sunglare filters for industrial use.
 en175 Personal protection - Equipment for eye and face protection during welding and allied processes.
 en1836 Personal eye protection - Sunglasses and sunglare filters for general use.



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Identification symbols for mechanical strength

Symbol Mechanical strength requirements (video)
No symbol Minimum robustness
S Increased robustness
F Low energy impact
B Medium energy impact
A High energy impact
EN166 2001

Optical Class
Optical class 1 = Continuous work (better quality)
Optical class 2 = Intermittent work
Optical class 3 = Occasional work (lower quality)

Symbols for field of use
Symbol Designation
No symbol Basic use
3 Liquids
4  Large dust particles
5  Gas and fine dust particles
8  Short circuit electric arc
9 Molten metal and hot solids.

 

 

Symbol T is used in conjunction with either F, B or A, to
indicate that the eye protector conforms to the high speed
particules classifications at extremes of temperature.

 

 

EN170 SCALE NUMBER 2-1,2 - 2-1,7


Shade colour : clear, blue, yellow or green.
Colour perception :
May be impaired unless marked “2C”
Typical application:
For use with sources which emit predominantly ultraviolet
radiation at wavelengths shorter than 313 nm and
when glare is not an important factor: this covers the
UVC and most of the UVD Bands (b).
Typical sources (a) :
Low pressure mercury lamps such as lamps used to stimulate fluorescence or «black lights», mercury lamps, germicidal lamps (a) (the example given for typical sources is for general guidance) (b) The wavelengths of these bands are recommended by IEC (that is 280 nm to 315 nm for UVB and 100 nm to 280 nm for UVC)

 

EN172 SCALE NUMBER 5-2


Shade colour : Smoke.
Use:
Recommended general filter for most uses.
Designation (1) :
Medium
(1) The designation is not translated literally in various language versions of this standard since the filter ‘darkness’ will be considered differently according to the intensity of light experience in the countries concerned.).

 

EN72 SCALE NUMBER 5.3-1


Couleur : Smoke
Use :
For use in the tropics and sub-tropics, for observation of the sky, for use in high mountain regions, snow covered areas, bright stretches of water, sandy plains, chalk
and limestone quarries.
Désignation (1) :
very dark.
(1) The designation is not translated literally in various language versions of this standard since the filter
‘darkness’ will be considered differently according to the intensity of light experience in the countries concerned.).

 

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The marking of oculars shall contain the relevant technical information presented as follows :
• Scale number (filters only) (optional) • Identification of the manufacturer. • Optical class
• Symbol for mechanical strength (where applicable) • Symbol for resistance to short circuit electrical arc (where applicable)
• Symbol for non-adherence of molten metal and resistance to penetration of hot solids (where applicable)
• Symbol for resistance to surface damage by fine particles (where applicable) (symbol K)
• Symbol for resistance to fogging (where applicable) (symbol N) • Symbol for enhanced reflectance (where applicable) (symbol R)
• Symbol for original or replacement ocular (optional) (symbols O or )
• In addition the ocular marking may include a certification mark and a mark to assist correct fitting of laminated oculars.

 

The marking of frames shall contain the relevant technical information presented as follows :
• Identification of the manufacturer* The number of this standard (EN166)
• Field(s) of use (optional) (depending of the model)
• Symbol for increased robustness/resistance to high speed particles/ Extremes of temperature (where applicable)
• Symbol indicating that the eye protector is designed to fit a small head (where applicable) (symbol H)* Highest ocular scale number(s) compatible with the frame (where applicable)
• In addition the frame marking may include a certification mark




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