Page 5 - Riley Eyewear Catalogue

GUIDE TO LENS MARKINGS

Optical Class
Manufacturer identity
1 ± 0.06 dioptres Can be worn at all times
2 ± 0.12 dioptres Should only be worn for occasional use
2C 1.2 1 F KN
3 ± 0.25 dioptres Should not be worn for long periods
Please Note: The complete Benchmark range is Optical Class 1
Optional Requirements

K Resistance to surface damage by fine particles
N Resistance to lens fogging
T Extreme temperature of -5°C and +55°C
Certification Mark
Filter Type Code
Scale Number (shade)
2 UV filter
1.2 Clear or Amber
2C or 3 UV filter with good colour recognition
1.4 Blue or I/O Waterproof
4 Infrared filter
1.7 Minimises or I/O
5 Sunglare filter 2.5 Grey or Revo
6 Sunglare filter with IR specification 3.1 Dark Grey or Mirror

Mechanical Resistance
MAX. Welding Filter
IMPACT LEVEL EYE PROTECTION TYPE
SPEED
A (T) High Energy Impact 190 m/s Faceshields 1.7 Welding Assistant
B (T) Medium Energy Impact 120 m/s Faceshields and Goggles 3-5 Brace Welding
Faceshields/Goggles/
F (T) Low Energy Impact 45 m/s 5-7 Oxy Cutting
Spectacles
S Increased Robustness 5.1 m/s Spectacles (CR39 lenses) 7+ Other Welding Other Welding
(T) : The frame/lens has had an additional extreme temperature test at -5°C and +55°C

GUIDE TO TEMPLE MARKINGS
Fields(s) of use (where applicable)
None General Use
3 Liquid droplets or splashes Certification Mark
4 Large dust particles < 5 μm
5 Gases and small dust particles < 5 μm
F 166
8 Short circuit electric arc
9 Molten metal and hot solids

Mechanical Strength
Number of the EN Standard
S Increased strength
Riley identity
F Low energy impact, resists a 6mm, 0.86g ball at 45m/s
B Medium energy impact, resists a 6mm, 0.86g ball at 120m/s
If protection against high-speed particles at extreme temperatures is required then the
A High energy impact, resists a 6mm, 0.86g ball at 190m/s selected safety eyewear product should be marked with the letter T immediately after the
‘Mechanical Strength’ letter; eg: FT, BT or AT.
If the ‘Mechanical Strength’ letter is not followed by the letter T, the safety eyewear product
shall only be used against high-speed particles at an ambient temperature.
If the frame and lens display different certification marks (F,B or A), the lowest level should
be assigned to the entire safety eyewear product.

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