A YouTuber’s latest 3D printer project includes a real tattoo gun and a large clamp to keep your skin in place.

Machine Gun Kelly is giving fans more insight into his decision to cover much of his fan-favorite chest and arm tattoos with a dramatic — and now viral — blackout tattoo. In his new piano rap ...

So he became a tattoo artist, using only his left arm. That is, until some months ago, when he met [Jean-Louis Gonzal], a bio-mechanical artist with an engineer background, at a tattoo convention.