The PVD technique involves coating the entire surface of an item with a thin layer of an extremely dense and extremely hard metallic compound. Performed in a vacuum in a controlled atmosphere, this coating guarantees lasting protection for Novellini products against scratches and abrasions, as well as effective protection against corrosive agents such as particularly hard or saline water, pollution and detergents. In addition, it is a lasting guarantee against stains, marks and oxidation.