That's right: Luminous ink exists and all you need to ... However, these types of tattoos don’t quite live up to their names: They don’t simply glow when you turn off the lights.

Consider this ink masculinity to the max. Sure, you should never get a name tattooed. But getting the initials of your mom, dad, or kids is a little more forgiving. After all, you’re stuck with them.

Ephemeral tattoos are meant to fade in 15 months, but years later, some customers say they're still stuck with the ink. The ...