Door handles and locks are typically crafted from Zamak (Zinc Alloy) or Aluminium Alloy, a brass alloy. This demands a high-quality, aesthetically pleasing finish in various colors. PVD Ion Plating technology has proven effective in this application. Following initial surface preparation like polishing, etching, or sandblasting, the PVD coating system offers a range of colors. The deposited film consists of pure metals or multiple layers like TiN, TiC, ZrN, CrN, TiAlN, presenting vibrant hues, strong adhesion, excellent scratch resistance, rapid deposition rate, and good diffraction.