Especially in the ultraviolet part of the spectrum and this makes it an ideal shield against the sun’s harmful rays which is why you get a tan when you go out in the Sun that’s your body producing and releasing more melanin in the skin but the idea with laser hair removal is to get the melanin in dark hairs to absorb the laser light without the skin around it absorbing.
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Much of that energy so it actually works best if you have really dark hairs and light skin infrared lasers are commonly used because melanin absorbs in this part of the spectrum more than other common molecules in the skin like water hemoglobin red lasers at manometers are also often used for the same reason as the melanin absorbs the laser energy the hair heats.
Up to well over a hundred degrees Celsius causing it to burn and vaporizing the water it contains and this puffs the hair up little Laser Hair Removal bit like a Cheetos it’s that expanding water vapor looking closely at the shot you can actually see the bubbles on the hair from the vaporization of water but the objective’s not to destroy the hair it’s to actually use the hair to destroy.
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The germ cells in the follicle that produce the hair in the first place so it’s kind of like using the hair to kill the hair this image shows a cross-section of three hair follicles following a laser hair removal treatment the one in the middle contained little melanin and therefore show is no damage the other to show the hair shaft has been destroyed rupturing the inner root sheath and damaging the outer root chief cells suffered damage when their temperature rises above degrees Celsius this is because at that temperature the bonds in proteins and collagen molecules start breaking apart and that’s a process.
known as denaturation so the hotter iris and the longer that temperature is maintained the more denaturation occur sand the higher the likelihood that that cell will die now if you caused enough damage to the cells in the follicle that make the hair the hair will never grow back and that is the goal of laser hair removal this sequence of ultra short pulses issued to ensure that the heat doesn’t spread too far into the region surrounding the hair so the idea is the hair heats up damages the germ cells right next to it but then the laser light turns off before that heat can spread too much further and then you hit the.