BS ISO 4619-1998 (R2005) Paints and varnishes drying agents is the international standard for drying agents used in Paints and varnishes. The standard specifies the classification, performance requirements, chemical composition and test methods of drying agents, with particular attention to the effect of drying agents on the Coating drying rate. The standard also specifies the quality control requirements for drying agents, including their stability, safety and environmental impact. In addition, the standard provides specific guidance on the Encasement, marking and storage conditions of drying agents to ensure their effectiveness and safety in practical applications. This standard provides a unified technical specification for the production, use and mass evaluation of drying agents in the Coating industry, and is an important reference in the manufacturing process of Paints and varnishes.