How to choose a good laser hair removal machine?

The main principle behind all laser hair removal is selective photothermolysis, matching specific wavelengths of light and pulse duration to get the best effect on the target tissue (melanin in the hair follicle) with minimal impact on surrounding tissue (skin). . Several wavelengths of laser energy have been used for hair removal. These lasers are characterized by their wavelength, measured in nanometers (nm). Some lasers are more effective for treating hair or treating specific skin tones, and some penetrate deeper than others.

1. Power: All effective hair removal treatments are based on the effective energy fluence, because the power of the laser machine is determined and the spot size is determined. Fluence can be divided into set pulse width and energy fluence according to the pulse width (time) change. Note that the kind of laser you get is not a real setup at all. Your effective treatment depends on the energy density, which is determined by the power of the machine, and there is no problem with the small size. But as the spot size increases, the energy density decreases a lot. Without enough total energy, it doesn't even give valid results.

2. Laser bar: Coherent in the United States has a high reputation. If you don't want to burn the handle in the future, it is best to choose a diode equipped with a good laser bar. The cost of laser rods from different companies varies widely, affecting the stability, purity, and lifespan of the laser output.

3. Cooling system: Cooling is used to support the handle, which determines most of the energy output and service life, if the cooling system is not good, serious heat will stop the machine or directly damage the machine.

4. Spot size: Generally speaking, a larger spot size means less flare in a larger treatment area (eg, the back). Fewer flashes mean less cost (every flash costs you money), but just as importantly, less flash means less work hours and more clients.

Note, however, that when a low-power diode uses a large spot size, it cannot provide an effective energy fluence for treatment.

5. The handle determines most of the energy output and service life, and cooling is used to support it. Severe heat can stop the machine or damage it directly.