I have precisely one tattoo, which I paid a trained artist an exorbitant amount of money to ink into my pasty skin. YouTuber Emily The Engineer may have developed a more cost-effective solution, however, as she's cracked open a 3D printer, bypassed its firmware, equipped it with a tattoo gun—and even found a willing volunteer to test it out.
Don't worry about the test subject's safety, though—there's a handy machine-halting panic lever installed for when they inevitably realise they've made a terrible mistake.
