This standard provides an improved Bandow-Wolff test method for evaluating the drying performance of coatings at different stages in drying. The method is designed to help understand the drying rate of coatings by determining whether the coating reaches the specified stages in drying (stages 4 to 7). Since different coatings behave differently during the drying process, the standard is particularly applicable to those coatings under physical drying or reaction control drying. The standard states that in the case of elastic plasticity Coatings, the determination of stages in drying may be limited, so this test should be used in conjunction with the Miscellaneous test method to ensure accurate measurement of the "drying speed" performance characteristics.