The 1064nm wavelength will shatters and removes the black and blue pigments while the 532nm wavelength will shatters and removes red, pink, purple and brown pigments of the tattoo or other pigmenations without damaging the normal tissue. Double crystal laser add another Yag crystal in the cavity of the laser resonant cavity, so that the laser has double energy, and the high-intensity energy can effectively remove the pigment in the cell.