This standard aims to regulate the core testing instruments used for evaluating the compressive performance of paper, paperboard, and corrugated board. It provides a detailed description of the fundamental characteristics, technical requirements, and calibration principles of fixed-platen compression testers used for performing the Ring Crush Test (RCT) for paperboard, the Concora Crush Test (CCT) for corrugating medium, the Edge Crush Test (ECT) for corrugated board, the Flat Crush Test (FCT) for corrugated board, and the Pin Adhesion Test (PAT). By providing a unified calibration method, this standard ensures the measurement accuracy and reliability of such compression strength testers, serving as the fundamental technical basis for obtaining comparable and accurate compressive strength data in laboratory and production quality control.