How does it work? 

"Each pulse of the laser sends light energy into your skin. We use different wavelengths of laser light to treat different colors of ink in your tattoo. As the light energy is directed into your skin, it is selectively absorbed by the tattoo ink particles trapped in the dermis of your skin. When the ink particles absorb this energy, they instantly shatter into tiny fragments. Once the laser has broken the ink into smaller pieces, your body's immune system works to remove the ink over the following weeks, flushing it away from the tattooed area. We see the result of this as the tattoo lightening in appearance. Each additional laser treatment breaks down more and more ink until the tattoo can no longer be seen."