There is no such thing as “black light wavelength”—so why do black T-shirts, black crayons, and black marking pens look black? Investigate a variety of black ink markers, and find out why they look ...

Tattoo ink, in general, is not regulated by the FDA ... the quicker it will fade and the more dull it will be under black light." Because the pigments are much brighter, you may see more of ...