Method for applying a metallic decoration to an automotive part substrate, automotive part with a metallic decoration, and motor vehicle with such a part

Abstract

The invention relates to a method (300) for applying a metallic decoration to a substrate (110) of an automotive part (100), comprising the steps of: - providing a substrate (110) made of plastic material; - metallizing the substrate (110) by depositing a reflective metallic layer (120) on the substrate (110); - to form an interference gradient on the automotive part (100), comprising the PVD deposit, in a deposition chamber (200), of a transparent layer (130) interfering with the metallic layer (120), said chamber (200) being configured such that a visible portion of the automotive part (100) is in the direct line of sight of a target (210) of base material, and a so-called non-visible portion is not permanently in the direct line of sight, so that a portion of gradient (P) of variable thickness of the transparent layer (130) is formed at the boundary between the visible and non-visible portions. (See Figure 6 for abbreviations)