The Q-switched Nd:YAG laser radiates the light of specific wavelengths in a high peak, ultra-short nanosecond energy pulse, the light penetrates the tissue and is absorbed by the pigment and results in an instantaneous blast. The pigment particles are shattered into fragments, parts of them will be bounced out of the skin and the other parts will be split into tiny particles that can be engulfed by phagocytes and then eliminated by lymphatic system. In order for the treatment to be effective, the laser light must be absorbed by the pigment. The colours of tattoos are often multiple and therefore one single session may not be sufficient for eliminating them all. Thanks to its dual wavelength the Spectrum QS, allows you to remove numerous colours with one single system. By working in the infrared (1064 nm) black and blue tattoos can be removed even in dark phototypes thanks to the low interaction of this wavelength with the skins natural melanin. The green light (532 nm) is effective on red or reddish colours and will have an effect on all other colours.