Ultraviolet is electromagnetic radiation, which occupies the spectral
range between visible and X-ray radiation. The wavelength of UV is in the range
from 10 to 400 nm. As known, ultraviolet light can be both useful and harmful,
depending on the time and amount of exposure.
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| An ordinary window can partially hold on UV |
Excessive amounts of ultraviolet light can damage human health. It can
accelerate skin aging or cause vision problems. In addition, such light can
cause the destruction of some materials. Many consumer polymers degrade because
of its influence. Polypropylene, polyethylene, polymethyl methacrylate (organic
glass) are among them, as well as special fibers, for example, aramid fiber.
Absorption of UV leads to the destruction of the polymer chain and loss of
strength in a number of points of the structure. UV can also cause various dyes
burnout.
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| Some types of windows have a higher protection factor |
It is known that glass partially protects against ultraviolet radiation.
Conventional window glass can block UV in the range of up to 315 nm. In
this case, the rays in the range of 400–315 nm pass freely. It means that any
ordinary glass can reduce the amount of UV light. Thus, glass shields
the interior from burnout and destruction, as well as protects your health. At
the same time, some part of ultraviolet still gets into the room and performs a
sanitary function.
