Common household hair removal device evaluation
June 17,2022
The effect of a home hair removal device (Photon\IPL\Color Light) is a proven and mature technology!
The principle is: that when IPL irradiates the skin tissue, the melanin-rich melanocytes in the hair follicle can absorb the energy of photons in the ultraviolet to the infrared band, convert it into a thermal effect, destroy the hair germ cells, and cause irreversible damage to the hair follicle. Selective photothermolysis effect, while only minor reversible damage to the tissue surrounding the hair follicle occurs.
The growth cycle of hair is divided into the growth phase, telogen phase, and regression phase. Under normal circumstances, about 80% of the hair is in the growth phase. The hair matrix cells in the hair follicles in the growth phase divide rapidly, have the most melanin, the strongest absorption of light, and are extremely sensitive to light, so they become the best target for hair removal.
According to the theory of selective photothermal action, as long as appropriate wavelength, pulse width, and energy density are selected, hair follicles can be destroyed precisely without causing damage to adjacent tissues.
How to choose a home hair removal device?
Summarize 4 core inspection factors:
Refrigeration technology: determine whether it can effectively reduce the skin temperature in time, eliminate pain and protect the skin;
Filter: Whether the light source is more accurately determines how much light and heat the skin absorbs to cause thermal pain;
The highest energy: the speed of the effect;
Overall cooling performance: Is the cooling effect durable enough?
Dismantling principle and case product interpretation
We will divide it into 4 sections: principle, structure, product classification, and selection suggestions.
Principle:
1. Different wavelengths of light are absorbed by the skin in different proportions. The principle of the hair removal device is to select the appropriate wavelength light source and appropriate intensity to absorb the melanin of the hair follicles so that the hair follicles gradually shrink and enter dormancy.
1. Different wavelengths of light are absorbed by the skin in different proportions. The principle of the hair removal device is to select the appropriate wavelength light source and appropriate intensity to absorb the melanin of the hair follicles so that the hair follicles gradually shrink and enter dormancy.
The difference between the wavelength bands of commercial laser hair removal devices and home color light hair removal devices in the output light source
Laser hair removal device
1. No matter whether it is a laser or color light hair removal device, no matter which wavelength of light source it is, part of the light will be absorbed by the skin. This is because the proportions are different, and there is no light source that the skin does not absorb at all. Therefore, the skin will heat up, and at the same time, the instantaneous heat of the hair root will heat up and cause local heat. Heat pain occurs when there is enough energy and not enough ice.
2. Laser hair removal device is a certain wavelength. The home hair removal device uses a filter to filter the light source that transmits part of the wavelength band. The ideal filter is the wave light in the range of 640-1200nm (red filter), and the current common one is 510nm-1200nm (orange filter). It is 475nm-1200nm (yellow-green filter).