Safety
1-4
Part 1089210A04
E 2010 Nordson Corporation
See Figure 1-1. Ultraviolet light is divided into wavelength bands A, B, C,
and V along with vacuum UV. Although values for wavelength bands will
vary depending on the source, the following ranges may be used as a
guide.
S Vacuum UV (100−200 nanometers) − absorbed by air and poses no
danger to humans.
S UV-A (315−400 nanometers) − represents the largest portion of UV
energy and is most responsible for human skin aging and increased
pigmentation. UV−A is at the lower limit of sensitivity to the human eye.
Referred to as far UV.
S UV-B (280−315 nanometers) − most responsible for reddening and
burning of the skin and damage to the eyes.
S UV-C (200−280 nanometers) − filtered by ozone. Referred to as near
UV.
S UV-V (400−450 nanometers) – visible UV.
Exposure to UV radiation can result in
S reddening of skin
S headaches
S sore eyes
X RAYS
ULTRA
VIOLET
INFRA RED MICROWAVES RADIO WAVES
VISIBLE
VACUUM UV
FAR
UV
NEAR
UV
UVC UVA
U
V
B
100 200 300 500 600 700 800 900400 1000 nanometers
U
V
V
Figure 1-2 Ultraviolet Light Wavelength Bands
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