All laser hair removal devices say that they don't work on light or grey hairs, why not make this hair dark and avoid the problem? Lasers say they work on the cheek on down, how close to the eye for upper cheek bone hair?
August 21, 2015
Answer: Dyeing hair for laser removal The effect that makes the laser work is the super heating of the hair follicle which is below the top layer of the skin. The darker pigment of the hair shaft deep in the tissue absorbs the laser light and heats up damaging the follicle. When you dye the hair the dye doesn't get into the follicle but remains at or near the the level of the skin, so the hair that is deeper in the follicle stays gray or light and doesn't heat up. Thus the follicle never heats either and says undamaged. As for the cheek, the laser can be applied up to the rim of the eye socket, so in most cases it will get those upper hairs.
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August 21, 2015
Answer: Dyeing hair for laser removal The effect that makes the laser work is the super heating of the hair follicle which is below the top layer of the skin. The darker pigment of the hair shaft deep in the tissue absorbs the laser light and heats up damaging the follicle. When you dye the hair the dye doesn't get into the follicle but remains at or near the the level of the skin, so the hair that is deeper in the follicle stays gray or light and doesn't heat up. Thus the follicle never heats either and says undamaged. As for the cheek, the laser can be applied up to the rim of the eye socket, so in most cases it will get those upper hairs.
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