This standard provides a unified test method for evaluating the storage stability of thermosetting powder coatings. Its core principle involves subjecting samples to accelerated storage at specific temperatures and then detecting changes in the physical state (such as clumping) and chemical activity (such as curing behavior) of the powder to predict its ability to maintain performance under actual storage conditions. The testing instruments mentioned in the standard primarily include a constant-temperature oven for simulating accelerated aging and a gelation time tester for assessing changes in the powder's gelation behavior. This method provides a critical basis for ensuring the performance of powder coatings after storage and transportation.