This series of products include SZ-PP, SZ-PP 5#, SZ-PP 7#, SZ-PP 8# and other models, which are specially designed for vacuum coating on PP substrates, and can be directly applied to PP without special surface treatment substrate as base coat. It has the advantages of strong adhesion, good brightness, quick drying at low temperature, high hardness (not easy to scratch), good hand feeling, not easy to colorful and matte. Traditionally, PP substrates require special surface treatment or pre-coating with primer before painting, which is labor-intensive, time-consuming, and wastes materials. Directly use this PP coating can produce a high-quality coating with strong adhesion, so it is favored by users.