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picosecond laser uses very short pulse output mode, instead of thermal effect, by the principle of light mechanical shock wave,pigment is shattered into finely granular via focused energy, are more likely to be absorbed by the body metabolism. the picosecond laser minimizes the side effects of thermal effects and can achieve the purpose of solving almost all kinds of pigment spots, which is better than the traditional laser whitening spots. this treatment is safer and less painful. for the skin, the combination of picosecond pulse duration and the 755nm wavelength's natural affinity for melanin can safely, effectively and quickly treat many pigmentation conditions..syi