... different color of pigment absorb different laser wavelength, what's more, black pigment and Hemoglobin strongly aborb the light of 1064nm and ... when using to remove some deep-skin tattoo and Ota's nevus. Q switch laser Function:· 1064nm suitable for: birth mark ... , coffee spot, freckle, senile plaque, pigment from outside injure, black, blue tattoo, eye line, eye brown and lip line etc ...