The principle of laser hair removal is to use different skin tissue to different light absorption efficiency of different wavelengths, adjust the laser to a suitable wavelength, and when it is irradiated onto the skin, it can penetrate to the depth of the hair follicle; in the process, Melanin absorbs the most energy, the temperature rises sharply, the hair follicles are destroyed, and the hair is removed.
Since the hair follicle melanin absorbs most of the energy, the energy received by other surrounding skin tissues is relatively low, the sweat glands are not affected, and the skin is hardly damaged. (This refers to the fact that the professional doctors operate the professional equipment with almost no skin will damage).
It is also said that the melanin in the skin also absorbs a part of the laser energy, so a small side effect of laser hair removal machine is that the skin of the hair removal will become a little white. It is said that friends who have done arm and leg hair removal will feel more obvious about this, or it may be the visual effect after hair removal (I don't think there is any obvious change).
There are three stages in the growth cycle of hair, which are growth, degeneration and dormancy. When depilation, the hairs of these three stages coexist, but only the hair follicles in the growth stage are fully developed, and the melanin content is the highest. It works best for it. The hair in the degenerative period can absorb 25% of the laser energy, while the hair in the dormant period absorbs almost no energy. It needs to be removed by the laser when it is returned to the growth stage. This process takes four to eight weeks.
Laser Hair Removal Machine
Therefore, laser hair removal is not to irradiate a laser, and there is no longer hair. A part usually needs to be treated 4 to 5 times. After each treatment is separated by two months, the hair will not grow any more. During the two months of the interval, don't do any treatment on the hair that grows. Generally speaking, it won't be exaggerated. With each treatment, the hair that grows will become softer and sparse.
The so-called permanent hair removal, the permanent hair removal equipment can make more than 90% of the hair to be removed, and can not be removed and become small. However, due to the presence of hair follicle stem cells, there may still be a small amount of hair growing in a few years.
Since the depilated laser acts on melanin, the darker and thicker the hair in the hair removal part, the better the effect. For example, some people may only need two or three times, and they will almost never grow longer; instead, the girls have small fluff on the upper lip. Because it is very soft and not very dark, it is very likely that it will grow out after eight times.
In addition, the laser of this wavelength will not improve the gross hair follicle. If there is a problem with large pores, other types of medical esthetic equipment, photons or laser treatment are needed.
