The ASTM D5722-20 standard specifies a test method for accelerated weathering of factory-coated embossed rigid fiberboards using condensed natural sunlight and soak-freeze-thaw procedures. This method evaluates the long-term efflorescences performance of coatings under real-world environmental conditions by simulating natural light and temperature changes. The standard emphasizes the use of control samples for comparison to improve the accuracy of test results and recommends at least two repeability tests to obtain statistically reliable data.