The standard focuses on the determination of over-stoving effect of organic coatings, and clarifies the method for evaluating the performance change of organic coatings under conditions beyond normal stoving temperature or time. It standardizes the preparation, stoving temperature and time layer settings of the sample. By observing the change of coating Appearance (such as discoloration, blistering, etc.), testing performance indicators such as adhesion and Hardness, quantifying the effect of over-stoving on coating mass, providing scientific measurement basis and evaluation criteria for controlling the process parameters of organic coating stoving and ensuring coating mass.