The ISO 1 2625-9: 2015 standard is used to determine the ball burst strength of tissue and tissue paper products. The standard describes a test method using a 50mm clamping device to assess the mechanical permeability of paper by measuring its maximum burst force under specified conditions. The standard updates the test procedures and refines the specifications of the test equipment. This test method is important for evaluating how paper resists mechanical impact in practical use, helping to ensure product durability and performance.