... materials used, different chemical tests can be applied. For example, Leather materialAzo dye, PCP, Formaldehyde, etc.Textile ... compression, sole skid resistance, cold crack resistance, etc.For upper materialsMaterial thickness, fabric weight, tensile, strength, flex ... , skid resistance, anti-static, aging test etc.For shoe accessoriesShoe lace/zipper strength, appearance of metallic accessories ...