The PVD (Physical Vapor Deposition) is such coating technology that forms a few micron hard films on tools. In Japan, it is called IP (Ion plating). The hardness of PVD is higher than tungsten carbide super-hard material. In comparison with hard-chromium, intruding too, the PVD film is much harder. The only few microns film is improves anti-wear property dramatically. Because the thickness is a dew microns, we can avoid the dimension changing problems except the application that require very precise accuracy. The PVD coating makes the product surface smooth and get more color option to upgrade product quality.
PVD coating improves the ability of resistance to abrasion, more gorgeous color. And this technology is corresponding international environmental protection technology, so the PVD coating won't be harmful for the healthy!