The ASTM D7073-20 standard guide provides a method for evaluating the performance of architectural coatings in practical applications. The guide recommends laboratory testing of homogeneous films with blade-type coating applicators and discusses the problem of uneven films that may occur in practical applications with application tools such as brushes and rollers. By comparing the actual coverage effect of different applicators on Coatings, the standard provides contractors and consumers with guidance on the actual application performance of Coatings, helping to optimize the use effect of Coatings.