This standard specifies a test method for determining the hiding power of spray paints by visually evaluating them. Hiding power refers to the ability of the coating to cover the substrate, which directly affects the appearance and protection effect of the coating. The standard describes the test conditions, test operating procedures and evaluation methods, and aims to evaluate the performance of spray paints by observing their covering effect. This method is suitable for the quality control, development and production of various types of spray paints, helping to ensure that the covering ability of the coating in actual use meets the expected standards.