ASTM D6360-15 (2021) Standard Practice for Enclosed Carbon Arc Exposure of Plastics specifies procedures and conditions for artificially accelerated weathering testing of plastic materials using enclosed carbon arc lamp equipment. The standard evaluates the weathering performance of plastics under long-term environmental exposure by simulating a combination of ultraviolet, visible light, and heat, including Color change, crazing, Gloss, and Mechanical Property deterioration. The standard details the calibrating of test equipment, setting of exposure periods, and methods for recording results to ensure test repeatability and Reliability of results. This regulation provides a scientific basis for the development, quality control and durability evaluation of plastic products, and is suitable for the performance testing of plastics and related products for outdoor use.