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 ... Certain “permanent” inks ...

“I didn’t even believe it at first,” she says about the fading ink. “They explained how it worked, how it’s not permanent ... ink to join the classic black. They also hope to join ...

Unlike permanent tattoo inks, Ephemeral’s formulation is made to fade over 9–15 months. The company offers only black ink tattoos at a handful of brick-and-mortar studio locations across the ...