A robot tattooist might have steadier "hands" than its human counterpart, but how do you know it's not going to accidentally tattoo you all the way down to the bone? That's all I could think of watching this video of what's been billed as the "world's first tattoo by an industrial robot." At around two and a half minutes in you can see how tightly the tattoo recipient has been strapped to a chair and you think: "Ah, if he moves, then things are going to get nasty."
That aside, it's wonderful to see an industrial robot being put to this use. The project was engineered by French designers Pierre Emm and Johan da Silveira (otherwise known as Appropriate Audiences), who have prior form in this department. Back in 2014, along with fellow ENSCI Les Ateliers-graduate Piotr Widelka, they created Tatoué, a Makerbot 3D printer with a tattoo gun instead of a plastic extruder. That creation has a good claim to being one of the first robot tattooists, but Emm and da Silveira's latest work — made as part of a residency at Pier 9 in San Francisco — certainly ups the stakes.
http://www.theverge.com/circuitbreaker/2016/8/4/12376760/industrial-robot-tattoo