3M Speedglas 9100 User Instructions page 72

E:1
E:2
Transmittance (%)
20
18
16
14
12
10
8
6
4
2
0
200 380
UV
(ultraviolet) radiation
– always blocked
68
780
VISIBLE LIGHT
Light transmission curve
Speedglas welding filters keep the welder
protected from harmful UV and IR radiation.
This protection remains always,in on, off,
dark and light state.
1000 1200
IR
(infrared) radiation
– always blocked
1400