Why are tattoos perminent?

Answer 1

Methods of tattoo removal include dermabrasion, skin grafts or plastic surgery, and laser surgery. All such methods may leave scars. In the early 2000s a group of scientists developed inks made from nontoxic pigments that could be contained within nano-beads. These nano-beads, implanted in the skin using traditional tattooing methods, created a permanent tattoo if left alone. The tattoo was removable, however, by means of a single laser treatment that would rupture the nano-beads; the inks thus released were absorbed into the body, and the laser treatment itself left no scar.

Answer 2

The ink is applied with needles that go into the top layers of the skin. When the ink goes that deep it's permanent. The only way to properly remove a tattoo with out damaging the skin too much is with lazer removal.