UV Portraits (10 images)

Why does our skin look different in UV portraits? Human hair and skin contains melanin to block cancer-causing ultraviolet light from the sun. The melanin is produced in the deepest of the five layers of the epidermis. Unlike visible light, UV light penetrates the outer layers of our skin and is blocked by the melanin, appearing dark in the portraits. (Sunscreen and UV blocking glasses also appear dark.)

It is often forgotten that the range of light that humans can and...
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