This standard provides a method for evaluating the stability of thermosetting powder coatings under specific storage conditions. It aims to determine changes in the physical and chemical properties of Coating powders during storage, thereby ensuring the mass and performance of the final coating. Coating powder aging mechanisms, including physical state and chemical reactivity, are covered in the standard to help manufacturers predict and improve powder storage ability. This edition of the standard adds definitions of terms, revises the selection of test boards, and updates normative references compared to previous editions.