The ISO 11093-8:2017 standard specifies a method for determining the Inherent Frequency and Bending Modulus of paper and Cardboard core tubes by experimental modal analysis. This method is suitable for cylindrical paper and Cardboard core tubes, and the bending modulus is calculated by measuring their Inherent Frequency in free mode of lateral vibration. Experimental modal analysis is an advanced technique that provides detailed information about the dynamic properties of materials, such as stiffness and damping. This standard provides a scientific basis for the performance evaluation of paper and Cardboard core tubes, especially in the fields of Encasement, transportation, etc., which helps to optimize material design and improve product Reliability.