The wavelength of light from ruby or ND YAG lasers is absorbed specifically by the colored pigments of the tattoos. The energy is then transmitted by fragmenting the particles of the connective tissue; these particles are then degraded and eliminated by the lymphatic system from the epidermis. The area of the skin subjected to irradiation will appear whitish for 10-20 minutes immediately thereafter, so a thin crust will form which will come off about 1-2 weeks later. In general, a few sessions at distances of several weeks are required to remove a tattoo. The green light of the ND YAG laser (532; 1064 nm) is very well absorbed by the colors red, Blue and dark colors in general. The laser can be used to remove benign pigmented lesions.