DesignAid

DesignAidPhotochromic materials change from clear to colored when exposed to UV light from sunlight, black lights, or similar sources. UV light changes the chemical structure of the molecules so that it absorbs certain wavelengths of light (therefore making it appear as a color to our eyes). The more UV light the more molecules absorb, the more brilliant the color change. When the UV source is removed, it reverts to a clear state.