Glows bright blue, purple, or pinkish-white Here is an overview of how some common colors appear under black light illumination: Color Common Colors and Their Black Light Appearance Additionally, minerals such as opal and ruby contain impurities that fluoresce. Organic substances such as chlorophyll, vitamin A, and proteins naturally emit fluorescence as well. Fluorescent dyes and pigments are frequently added to paper, textiles, inks, detergents, and personal care products to produce bright colors and optical effects. Many common materials contain fluorescent additives designed to make them glow under black light. As the electrons drop back down to their ground states, energy is released in the form of visible light, causing the material to glow. When UVA light strikes certain materials, the photons excite electrons in the atoms of the material to higher energy states. This type of UV light has wavelengths between 320-400 nanometers, which is just beyond the violet end of the visible light spectrum. ![]() How Black Lights WorkĪ black light is a lamp that emits long wave ultraviolet (UVA) light. ![]() Understanding how colors respond to black light radiation can be useful for artists, scientists, security personnel, and anyone else working with UV reactive materials. When illuminated with a black light, some colors appear brighter or are transformed into different colors entirely. Black lights, also known as UV lights or Wood’s lamps, emit ultraviolet radiation that causes certain materials to fluoresce or glow.
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