Physical vapor deposition (PVD) describes a variety of vacuum deposition methods, same theory as Ion plating.

Ion plating is carried out in a vacuum environment,At low pressure-one thousandth of mercurial pressure-solid metal vaporizes and becomes electric ions when heated and bombarded by electrons, known also as plasma too

Ion plating makes the gold plating more durable, more wear resistant, and also has a higher brightness than traditional wet plating

performance have proved that the plating obtained through Ion plating is five to eight times better than that obtained through traditional methods in terms of wear and corrosion resistance.