The hair follicles contain melanin. After absorbing light of a specific wavelength, melanin will heat up and burst, so as to achieve the effect of destroying the hair follicle.

Therefore, in order to achieve satisfactory results, it is best to do it when the melanin content of the hair follicles is highest, so that the hair follicles are more prone to damage. When is the most melanin in the hair follicle? Hair growth can be divided into three phases: growth phase, recession phase and resting phase. Among them, since a large amount of melanin is produced in the hair follicles in the growing period, the areas that need to be removed 2 to 3 days ago can be shaved before hair removal.

Back to the topic, now let us introduce some popular optical hair removal devices on the market.

1. Intense pulsed light hair removal

Also known as Intense Pulsed Light, or IPL for short. Intense pulsed light is the leader in optical hair removal technology. The light it emits is a limited range of wavelengths. The more popular wavelengths on the market are 640~900 nm and 640~1200 nm, and there is little difference between the two. Since IPL is not a fixed wavelength of light, the kinetic energy of it is gradually reduced during the whole process of illuminating multiple times, while laser hair removal is a fixed wavelength of light, so the whole process of illuminating multiple times is reduced. The kinetic energy remains the same, which is the biggest difference between the two technologies of IPL and laser. More details later. Because pulsed light treatments like this are less effective for light-colored hair.

2. Laser hair removal

This range is relatively wide. Let us list some of the more popular laser hair removal techniques on the market.

a. Emerald green spar laser, also called Alexandrite Laser, the light wavelength is 755nm.

b. Semiconductor laser (diode laser), usually the wavelength of light is 808nm or 810nm.

c. Long pulse laser, usually the wavelength of light is about 1064nm.

Most of the beauty salons in China use Alexander laser and semiconductor laser. The laser hair removal equipment has a certain wavelength and high energy, which has a significant effect on the treatment of long-term hair removal and hair color. But because of this, its treatment price is much higher than pulsed light treatment. A customer has done semiconductor hair removal (home machine). His hair is light black. Just after finishing the depilation, the hair on his arms fell off with a single touch.

In fact... Whether it is IPL hair removal or laser hair removal, the results are very optimistic for Asians. Permanent hair removal is possible. In terms of cost-effectiveness, laser hair removal is recommended.

Finally, talk about how to protect it after treatment, otherwise after a few days of hair removal, it will grow back and become darker and denser.

1. Do not drink stimulant drinks (tea, coffee)

2. Don't eat any heavy food (chili, vinegar, soy sauce), try to be light.

3. You must pay attention to sun protection, cosmetics should also be used with caution, and some repair fluids can be used appropriately.

4. Drink plenty of water.