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 The tear strength is the measurement of internal tearing strength of paper and performed according to the Elmendorf principle by using four plies of the sample.


It has a free oscillating pendulum mounted on a framed body and both have one clamping jaw in line with each other. It has a pointer that indicates the tearing resistance when the sample is clamped between the two jaws and tear takes place.

The sample held between the jaws is initiated with a small tear by the knife lever. The tester has a stopper lever and when the lever is pressed the sample is torn. The resistance to tear is measured by the pointer.