The ASTM D 2565-23 standard specifies the Xenon-arc exposure test method for evaluating the durability of plastic materials in an outdoor environment. The standard is based on the relevant test methods of ASTM G151 and ASTM G155 and covers the preparation of test samples, test conditions, and evaluation of results. The test simulates the effects of UV radiation, heat, and Humidity on plastic performance and is able to accurately predict the outdoor service life of the material. The standard also provides detailed guidance on key test parameters such as the choice of bulb Filter, irradiance, exposure time, etc., ensuring the accuracy and Reliability of the test.