ASTM D7787/D7787M-13 (2022) Standard Practice for Selecting Wood Substrates for Architectural Coatings Weathering Resistance Evaluation provides guidance on selecting wood substrates suitable for use in architectural coatings weathering resistance evaluation. The standard details the selection criteria for wood substrates, including factors such as their surface condition, texture, moisture content, and wood type, which affect the performance of coatings in exposed environments. Reliability and accuracy of test results can be ensured by selecting appropriate wood substrates, providing a scientific basis for evaluating the durability, adhesion, and color retention properties of architectural coatings. This standard is applicable to Coating manufacturers, research institutions and related quality control units, especially in the external environment simulation and product performance testing has important application value.