The standard "NF EN ISO 2589-2003 Leather, Determination of Film thickness of Leather" specifies the method for the determination of Film thickness of leather. Film thickness of leather is an important indicator for evaluating the mass and performance of leather. It directly affects the performance of leather such as strength, softness and comfort. This standard provides film thickness test methods for different leather materials, which are applicable to many types of leather, including natural and synthetic leather. By adopting standardized measurement techniques, the accuracy and conformity of Film thickness data can be ensured. The standard also details the use requirements and operation steps of the testing instrument, providing a reliable reference for leather manufacturers, testing institutions and quality control personnel.