Group 1 - The market regulatory authority has approved the release of 7 national standards in the leather industry, aimed at enhancing product quality and promoting healthy, high-quality development in the sector [1][2] - Two national standards, "Specifications for Blue Wet Leather of Sheep" and "Specifications for Blue Wet Leather of Goat," set clear requirements for product quality, including raw material selection and harmful substance content, ensuring high-quality raw materials for downstream processing [1] - Three national standards focus on physical performance testing methods for leather, simulating real-world usage scenarios to assess durability, strength, and stain resistance, providing scientific basis for product performance evaluation [1] Group 2 - Two national standards establish unified protocols for color fastness testing in leather, significantly improving the comparability and accuracy of test results [2] - The standards also include methods for assessing the risk of color transfer from leather to polymer components, ensuring the aesthetic quality and color stability of leather products over time [2]