Bending a coated metal substrate under a cylinder provides indicators of the paint film's ductility and adhesion under bending stress. The cylinder bend test involves placing the test panel on a shaft of known diameter for bending, then inspecting the coating for cracking, peeling, or other damage. Shaft diameters: 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 25, and 32 mm. Note: 20, 25, and 32 mm are shaft sleeves.
