The GB/T 9779-1988 standard was issued by the National Technology Bureau and stipulates the general technical conditions for multilayer architectural coatings. The standard applies to coatings using binders and aggregates such as cement, silicon muriatic acid and synthetic resin, mainly for Spreaders on building walls. The standard covers the formulation, performance requirements and application methods of Coatings to ensure that the decorative and protective functions of Coatings on building walls achieve the desired effect.