Folding Tester For Testing Lab

Folding Tester - The ability of leather used in bookbinding to successfully withstand without cracking repeated opening and closing of the book is determi­ned by subjecting the leather to a repeated folding test.   In this test the test specimen in form of a rectangular strip of leather is bent repeatedly for one hundred times through 180°, the folding being done at the same location each time. At the end of this test, grain crack shall not occur on the outer folded surface of the leather specimen under test.   The  Folding Tester for bookbinding leather consists of a fixed grip for holding one end of test specimen, an oscillating arm which can move through a angle of 180° about a horizontal axis, and a flat blade held in a horizontal plane with its front edge coinciding with the pivoting axis of the oscillating arm. civil lab equipments manufacturers

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