Metal paper is not a single specific material, but a general term for paper materials that have a metallic luster on the surface or contain metallic components. Depending on the application, it is mainly divided into three categories: decorative packaging, industrial functions, and traditional craftsmanship. In daily life, it often refers to aluminum foil composite paper or gold-embossed paper; in the industrial field, it may refer to gas-phase rust-preventing paper or metal fiber paper.