GB/T 11183-1989 "Bicycle topcoat" is a non-equivalent national standard using JIS K5652:1983, which stipulates the technical requirements of Bicycle topcoat. The content includes product classification (such as amino alkyd resin, etc.), technical indicators (gloss, adhesion, hardness, weathering resistance, water resistance, etc.), test methods (such as film preparation, performance testing process), inspection rules and Encasement storage and transportation requirements. This standard applies to the decorative and protective topcoat of Bicycle metal parts, which aims to standardize the performance and construction mass of the topcoat, ensure that the coating is colorful, has strong impact resistance and adapts to the outdoor environment, and provides a technical basis for the production, inspection and application of Bicycle topcoat.