The basic principle of laser hair removal is the “photo thermolysis selective “. The laser causes localized damage by burning the black areas emitting hair without burning the rest of the skin . The light is absorbed by the target substances (in hair removal is melanin) having high affinity with this wavelength, and that the heat released by consumment of the absorbed energy.
Laser hair removal targets primarily melanin . There are two types of melanin: eumelanin (which gives skin and hair black) and pheomelanin (which gives red hair, the color of Asian skin and freckles).
Less hair contain melanin, the laser is less effective. For this reason, people with gray hair, red or blond are not good indications for laser hair removal.
On the other hand, the skin contains more melanin, the less the laser manages to make the difference between the skin and hair. This is why black people or very dull skin can benefit from care with conventional lasers (Alexandrite type). For black skin, it was developed for specific lasers in the infrared between 800 and 1064 nm. 810 nm lasers, diode often, can, by lengthening the time of application of energy, hair removal dark skin. Infrared lasers or 1064nm Nd: YAG have lower affinity for melanin. This lower affinity preserves dark skin while retaining some efficacy on the hair (especially as the hairs on black skin are highly concentrated melanin). These lasers typically require a few more sessions, but can treat black skin. Some argue that these lasers can remove hair tanned skin while tanning must recuse patients because it is an indication against-temporary (less effective as laser diverted from its target hair, increased pain, increased risk of burn ).
Light skin and dark hair is the best combination for laser hair removal Calgary. For other skin types , special lasers or electrolysis will be offered. The results are, for example ultrasound, user-dependent. Ie with the same machine, two different doctors have different results. The choice of doctor is as important as the choice of the laser. Moreover, whether for hair removal by laser or flash lamp, it is a medical procedure, as stipulated in Article L. 372 of the Public Health Code as amended by Order of January 6, 1962. Anyone else using a laser or a flash lamp in order to achieve hair removal illegally practicing medicine.