Ultraviolet (UV) is a shorter wavelength right next to infrared wavelengths on the electromagnetic spectrum. UV energy is visible to the eye (but do not look at it or you will damage your retina!) and has many commercial applications but not yet for garment decoration. For UV energy to be absorbed there must be unique photo initiators in the object/coating to absorb the UV energy. Infrared does not require the presence of unique photo initiators.