That is, through the ultra-pulse time of milliseconds and microseconds, the laser can instantly penetrate the epidermis of the skin and reach the deep layer of the skin, so that the pigment particles inside the skin are instantly crushed, and the crushed pigment particles will be swallowed by macrophages of the human body and then slowly transported away.
Because the laser with a specific wavelength can reach the diseased pigment tissue through epidermis and dermis, it only acts on pigment particles, so there is little or no damage to the epidermis of the skin and no obvious damage to the texture of the skin, so there will be no scar on the skin. Laser with different wavelengths can selectively absorb black, blue, green, brown, red, brown and yellow pigments in the skin. In technical terms, it is called "light explosion effect".