The standard is ISO 11341:2004 "Paints and varnishes artificial aging and artificial radiation exposure exposure to filtered Xenon-arc radiation (with filters) ". The standard specifies the test method for artificial aging and radiation exposure of Paints and varnishes coatings using filtered Xenon-arc radiation, covering equipment configuration, filter requirements, exposure parameters, operation procedures and performance evaluation. By simulating natural sunlight radiation conditions, the weathering resistance and radiation resistance performance of coatings in artificial accelerated aging environments can be evaluated, providing technical basis for aging quality control and performance testing of Coating products.