The standard defines the technical requirements for the finishing of timekeeping instruments, especially watch metal Appearance parts, including the Appearance, adhesion and durability of the paint layer. The standard aims to improve the mass of watch Appearance parts and ensure their stability and aesthetics in use. Proposed by the mass standards department of the China Light Industry Federation, the National Watch Standardization Center is centralized, and Shanghai Bell Factory is responsible for drafting, which ensures the comprehensiveness and implementation of technical requirements.