[therealpygon]

Makes you wonder why; if we can cut steel in half with water, would it be possible to deliver ink to a specified depth with high pressure “ink needles” (microscopic high pressure short burst of liquid ink)? Like a super high pressure inkjet printer.

Though, I assume a more practical point might be a robot that would have an ink-feeding extremely fast cycling device for doing tattoos that can complete them in a fraction of the time. Would suck for artists if you could just AI design your tattoo and have it done in minutes by a robot that can sense your movements and reactions and adjust in real time.

[sawjet]

You can't cut steel in half with water. Waterjet cutting requires an abrasive media like garnet to cut through hard materials. Water is simply the power source that accelerates the garnet to Mach Jesus.

[therealpygon]

Plain water can cut through aluminum and other thin metals at pressure, and human skin probably isn’t harder than that, but that’s a good clarification for those who are unaware of the additives commonly used for harder materials like steel/thick aluminum/etc. and it was my mistake to say steel originally. Thanks for pointing it out.

[psd1]

My guess is that pressure-blasting the ink will not be more comfortable than driving it in with a physical needle.

Maybe this belief comes from being a sysad - dot matrix printers never did me no harm, but inkjets are demonic.

[delecti]

We used to do some injections via jet injector. That was before my time, but the testimonials I'm seeing online say that they weren't painful.