Pulsed light hair removal is a technique that uses a device emitting light rays to eliminate hair. This method is based on the process of photothermolysis which aims to produce thermal damage in the targeted element, in this case the hair, while minimizing damage to the surrounding tissues.
For this, the laser hair removal device will emit light pulses that will be captured by melanin, a pigment present in hair and responsible for its color. This acts as a chromophore, that is, a chemical compound that absorbs light at a specific wavelength.
As soon as melanin absorbs light, it transfers this energy to the surrounding molecules, causing a temperature increase. This heat is then transmitted to the hair bulb, which can cause significant damage, particularly the apoptosis of the hair follicle.
Hairs grow independently and are not all at the same stage of the hair growth cycle. Therefore,multiple sessions of pulsed light hair removal are necessary to achieve lasting results. This methodallows to eliminate nearly 80% of hairs from the legs and underarms. Being minimally painful, it is also suitable for the sensitive bikini and facial areas.
It should be noted that hair removal using pulsed light has no effect on light or bleached hairs, as these have a low melanin content that does not allow them to be accurately targeted by pulsed light. It is primarily used on dark hairs, which are rich in melanin. Moreover, it is not recommended for tanned skin, due to the similar color of the skin and hair.