ISO 2493-2 specifies a method for measuring the flexural strength of paper and Cardboard using a Taber type tester. Flexural strength is a measure of the resistance of a material to bending under force, which directly affects its applicability in fields such as Encasement and printing. The standard describes in detail the test equipment, test procedures, data processing and factors affecting the test results to ensure the accuracy and comparability of the measurement. The method is suitable for paper and Cardboard in different thicknesses and stiffness ranges, providing a technical basis for product quality control and performance evaluation.