This standard specifies steps for measuring the volume of non-volatile matter in coatings and related products. The method includes determining the volume of non-volatile matter by measuring the density of dry coatings. The standard states that the volume of Dry-Film is affected by the cissing or expansion of Resin and solvent, and therefore provides an accurate way to determine it. The standard applies to air drying materials and emphasizes temperature and time control when measuring the volume of non-volatile matter. This method can effectively calculate the spread rate of coating materials and ensure that the product mass meets the specifications.