A small amount of colored pigment is injected under the surface of the skin using a pen-like needle or a traditional tattoo gun.
Some permanent cosmetics technicians use a standard tattoo gun for their makeup application.
Most often, this is done with a special machine called a tattoo gun.
This body tat was inked in a traditional manner, meaning the ink was tapped into the skin without a tattoo gun.
Even within the secured bars of a prison cell, it's rather easy for inmates to design a useful and functioning tattoo gun.