 The ring crush resistance of paper and paperboard is the maximum compressive force that a test piece will sustain without being crushed, the test piece being in the form of a cylinder, standing on one end, and the force being applied to the other end under specified conditions. The tester is designed for determining the edge wise ring crush, flat crush, ply adhesion, corrugated crush test for corrugated board, paper board and similar sheet material. The result are measured on precision dial with maximum peak pointer.
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