Two pieces are generally tested: one with the flex parallel to the backbone and one perpendicular to the backbone. 4. Test Procedures
ASTM D6182-21 establishes a standardized, Bally flexometer-based method for evaluating the flexibility and adhesion of surface coatings on finished leather, specifically detecting cracking, delamination, and discoloration. The test simulates real-world stress on materials for applications like footwear and upholstery, ensuring quality control by simulating continuous flexing. For the full standard, visit ASTM International . astm d61821 pdf
: After a set number of flexes, the leather is checked for signs of damage like tiny cracks or finish separation. Variations Two pieces are generally tested: one with the