The full name of AF is Anti-fingerprint, which does not mean that AF has no fingerprint at all, but AF reduces the adhesion of fingerprint, making the dirty surface easy to clean. Anti-fingerprint treatment is to use the lotus leaf principle, coating a layer of nano chemical material on the surface, so that the surface tension is reduced to the minimum, with strong hydrophobic, anti-fingerprint, anti-oil, so that the surface is not easy to produce fingerprints, wear resistance.