The ASTM D5150-92 (2017) standard specifies a hiding power test method for applying architectural coatings using a roller. This method is suitable for evaluating the covering performance of coatings on a specific substrate to ensure that it meets the actual application needs. The test uniformly applies the coating on the contrast substrate by roller and measures the covering effect of the coating to determine its hiding power index. The standard specifies the requirements for test equipment, coating procedures, substrate preparation and Data analysis, providing a fast, practical and Repeatability evaluation method, providing an important reference for architectural coatings manufacturers, users and quality control. This method helps to optimize Coating formulation, improve product performance, and ensure Reliability and conformity of architectural paintings.