The Crush Tester is used to measure the compressive strength of samples Paper (Liner Medium) Corrugated Board: CMT RCT CCT ECT FCT PAT. Designed to meet standards: ISO 7263 13805 3035 13192 TAPPI T808 T809 T811 T818 T821 T 822 T823 T824 T 825 T839 EN 23035 .