GB/T 9264-2012 "Paints and varnish sag resistance assessment" standard specifies a method for evaluating the sag resistance of coated materials. This standard applies to liquid Coatings, which are mainly assessed by two application methods: one is to use a scaled sag coating applicator to scrape on a horizontal test plate and then place it vertically, and the other is to use a spray gun to apply the assessment on a vertically placed substrate. The standard specifies the preparation work before application, the operation steps during the application process and the Coating drying conditions. In addition, the standard also lists relevant terms and definitions, normative reference documents to ensure the accuracy and repeatability of the assessment process.