The Picosure laser fires in picoseconds. It's hard to fathom, but that is one trillionth, or one millionth of one millionth of a second! These pulses create a photomechanical effect, or PressureWave™, that targets ink while avoiding unmarked tissue. PressureWave™ shatters the ink and brown spots into tiny, dust-like particles which are easily eliminated by the body. The result is clearer skin, in fewer treatments, without injuring the surrounding skin.The laser fragments the ink, allowing your body to absorb it and break it down naturally.