The ISO 17186 standard specifies the test method for determining the Coating thickness of leather surfaces. The standard is applicable to all types of leather products, especially on coated leather surfaces. With this test method, the thickness of coatings can be accurately measured, thus evaluating their mass and performance. Coating thickness is a key factor affecting the durability, Appearance and touch of leather. Therefore, accurate Coating thickness determination is essential for leather production and quality control. The standard uses appropriate physical and mechanical test methods to ensure Reliability and conformity of measurement results and is widely used in mass inspection and product development in the leather industry.