1, red light: it is a light source with a wavelength of about 660nm, and it is a cold light emitted by a narrow-spectrum light source. It does not give off heat or burn the skin, and it is very safe.
2. Blue light: It is a light source with a wavelength of about 405-420nm. It is a cold light emitted by a narrow spectrum light source, which does not give off heat or burn the skin, and is very safe.
Second, the role is different.
1, red light: shorten the recovery period, reduce the formation of acne marks, and play the role of removing and repairing acne marks; It is mainly used for the repair of inflammatory acne after acute phase.
2, blue light: kill Propionibacterium acne, inhibit inflammation.
Third, the principle is different.
1. red light: It can penetrate deeper into skin tissue and act on deep fibrous cells than blue light, promote blood circulation, enhance cell activity, promote cell secretion to produce collagen and fibrous tissue generation, and accelerate new skin regeneration.
2. Blue light: It can penetrate deep into the skin surface and transform the metabolite of the photosensitizer porphyrin of Propionibacterium acne into singlet oxygen under aerobic conditions.
Baidu encyclopedia-red and blue light acne removing