Getting a tattoo is a notoriously painful process but that doesn't stop all that many people from getting their skin inked. Luckily for them, tattoo machines have come a long way from the tools ...
The reason tattoo ink stays in skin forever has to do with the immune system. When you get a tattoo, the ink flows down the tattooing needle into the middle layer of your skin, called the dermis.
8, 2023 12:01 p.m. | Friday, Sept. 8, 2023 12:01 p.m. A tattoo needle punctures the skin around 100 times per second, depositing the ink 1.5 millimeters to 2 millimeters below the surface.