The DIN EN ISO 9117-2:2010 standard specifies the drying test method for Paints and varnishes, in particular the stackability test. Stackability refers to the ability of coatings to withstand the pressure of stacked items without deformation or damage during the post-Spreader drying process. This test evaluates the physical stability of coatings after drying or curing by simulating the stacking environment. The standard describes in detail the experimental equipment, sample preparation, test conditions and scoring methods. This test method is suitable for many types of Coatings, especially Coatings that need to withstand stacking pressure during transportation and storage. Through this test, the manufacturer can evaluate the stacking resistance performance of the coating, ensuring the mass and stability of the product during use.