New Requirements for Raw Material Quality and Physical Properties: 7 National Standards Issued in the Leather Field

It was learned today that the State Administration for Market Regulation has approved and issued 7 national standards in the leather field. These standards are closely aligned with the practical production and core quality control needs of the leather industry, putting forward clear requirements in three aspects: raw material quality, physical properties, and color fastness testing. They aim to further enhance the quality of leather products and promote the healthy, orderly, and high-quality development of the industry.

Two national standards, "Specification for sheep wet-blue leather" and "Specification for goat wet-blue leather," respectively regulate the product quality of sheep wet-blue and goat wet-blue leather. They specify key indicators and test methods for aspects such as raw material selection, sensory quality, shrinkage temperature, and harmful substance content. This ensures strict control of raw material quality from the source, guaranteeing that wet-blue leather accurately meets the processing requirements for subsequent various leather products and laying a reliable foundation for downstream production stages.

Three national standards, "Determination of flex resistance of leather — Part 1: Lastometer method," "Leather — Physical and mechanical tests — Determination of tensile strength and elongation," and "Determination of soiling of leather — Part 2: Martindale friction method," specify test methods for the physical properties of leather. By simulating scenarios such as stress and friction during daily use, they accurately assess the product's flex resistance, strength, toughness, and anti-soiling ability. This provides a scientific basis for evaluating leather product performance, helping enterprises to optimize production processes targeted and comprehensively improve product quality.

Two national standards, "General principles for testing colour fastness of leather" and "Colour fastness of leather — Colour fastness to migration into polymeric materials," establish unified specifications and guiding principles for leather color fastness testing. This ensures all tests are conducted under consistent conditions, significantly enhancing the comparability and accuracy of test results. Simultaneously, they define the test method for color fastness to migration into polymeric materials, effectively assessing the risk of surface color transfer from leather to polymer accessories during long-term use, thereby safeguarding the appearance quality and color stability of leather products.