ISO 13820 pdf download Paper, board and corrugated fibreboard — Description and calibration of compression-testing equipment 1 Scope This International Standard specifies the essential characteristics and the principles of calibration of compression testing equipment used in the testing of paper, board, and corrugated fibreboard. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its...