According to the GB/T 1865-2009 standard, "Paints and varnish artificial climate aging and artificial radiation exposure filtered Xenon-arc radiation" specifies the test method for evaluating the weathering resistance and light resistance of Paints, varnish and related product coatings under artificial climate or artificial radiation conditions. This standard specifies the requirements for the test equipment, radiation sources, filter systems and test parameters used to simulate the effect of natural climate on coatings. Humidity adjustment systems, test racks, radiation dosimeters and other equipment in the test chamber must comply with the standard to ensure the reproducibility and comparability of test results. This standard is applicable to the performance evaluation and quality control of coating products, providing important technical support and evaluation basis for the industry.