GB/T 21782.11-2010 "Powder coatings - Part 11: Determination of inclined plate flow" specifies the method for determining the inclined plate flow of powder coatings, serving as a critical standard for evaluating the applicability of coatings during application and the quality of the coating layer. The test must be conducted under specific temperature and humidity conditions, utilizing an adjustable-angle inclined plate, a heating device, temperature measurement instruments, and high-precision timing tools. Performance is assessed by recording the flow behavior of the powder on the inclined plate. This standard unifies testing methods, providing a reliable basis for optimizing production processes and quality control.