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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.

"LINUX" ELMENDORF TEAR TESTER

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.