ISO 18280 is an international standard that specifies test methods for plastic epoxy resins. The standard outlines a variety of test methods for characterizing epoxy resins, including determination of epoxy value, acid value, moisture content, viscosity, curing time, hardness, tensile strength, bending performance, and other physical and chemical properties. These methods provide a unified test basis for quality control, performance evaluation, and application development of epoxy resins. These standardized testing methods ensure the performance stability and reliability of epoxy resin products in different applications, and also facilitate mass communication and agreement between suppliers and customers.