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How does laser hair removal process work?

Laser hair removal is widely recognized as the most effective process for permanent removal of unwanted hair. The procedure is minimally invasive and very precise, which helps to preserve the surrounding skin and maintains a sharp focus only on the targeted area. CO2 based laser technology is highly popular for hair removal procedures.

The Laser Hair Removal Principle

The core principle that works behind laser hair removal is known as selective photo thermolysis (SPTL). This involves matching of the pulse duration with a specific wavelength of light to achieve the optimal effect on the target tissue, without affecting the surrounding tissue. This is the biggest benefit of lasers because they can confine the damaged to a controlled, localized area by selectively heating the dark target matter called melanin.

The target is the hair follicle that actually causes hair growth. The laser beam works to destroy the unwanted follicle so that it does not re-grow quickly. An expert laser skin specialist will be able to ensure that the rest of the healthy skin is not heated or affected by this process. Dark objects have a property to absorb light, therefore intense laser light can be absorbed by the dark matter in the skin with a high speed and intensity. This dark target matter called chromospheres can occur naturally or can be introduced artificially.

Ideal Hair Type for Laser

The primary chromophore for hair removal lasers is melanin. This is a naturally occurring pigment in the skin that provides color to the hair and skin. Hair usually has two types of melanin. Eumelanin provides black or brown color to the hair, while pheomelanin provides red or blonde color.

Due to the selective absorption of laser light photons, laser works best for removal of black or brown hair, particularly dark and coarse hair. The ideal patient for laser hair removal is a person with light skin and dark hair. However, new laser hair removal technologies are now able to achieve a degree of success in patients with dark skin as well.

Efficacy and Speed

Laser based hair removal approach has become popular because of the efficacy and speed of this procedure. Efficacy also depends to an extent on the experience and skill of the laser expert and the choice and availability of the latest laser techniques and technology. Some patients may require touch-up treatments, particularly if the affected surface area is large. If an inappropriate laser device is used or the patient is not a good candidate for treatment, the patient may not respond favorably to the laser therapy.