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A. The sun produces invisible rays called ultraviolet-A (UVA) or ultraviolet-B (UVB) that can damage the skin. Too much sun can cause sunburn, skin texture changes, and skin cancers. Rashes also can be attributed to sunlight. Even on cloudy days, UV radiation reaches the earth and can cause skin damage.
Ultraviolet effects upon the skin. The UV from arc processes does not produce the browning effect of sunburn; but does cause reddening and irritation caused by changes in the minute surface blood vessels. In extreme cases, the skin may be severely burned and blisters may form.