1, head. Distinguish between good and bad have two heads, one shear force, the second is durability. A simple way to test the blade shearing force is to take a very soft hair experiment, even if it is very soft and good blade can still cut hair. The difference between ceramic and steel knife blade head: more expensive ceramic blade will not rust, but fragile; steel tips more affordable, because it is used in stainless steel, generally will not rust (unless a long period wet state), but not broke, long service life. Relatively speaking, ceramic sharper, faster haircut, the hair is also lower the probability of cards some! 2,power. waterproof hair trimmer powered strength also distinguish good and bad haircut is a very important indicator. Barber dynamic strength testing has a very simple and effective method: get the machine to switch on after idling for about 10 minutes, then put a hand to pinch the blade. 1) If the machine gently pinch stopped it, and release your finger to rotate the machine does not need to turn on the switch again to close the rotation, it means the barber's power is weak, it is prone In Barber during downtime status; 2) If you need to use a larger effort to pinch the blade, and let go of the machine still recover the rotation, then explain this better power Barber, Barber does not occur during the shutdown status . 3, the noise. When running noise hair trimmer clipper size is also a very important indicator. If the noise is relatively large, ranging appears to attract baby attention, not smooth haircut, while scared the baby, causing the baby crying.
