The Bending Resistance of paper, paperboard, and other flexible flat-sheet materials is determined by measuring the force required to bend a specimen under controlled conditions. The method is not recommended for soft, limp or creped materials. Materials such as tissue or toweling would not normally be tested by this procedure and materials with a pronounced degree of curl would give erroneous results.
The Globe Bending Resistance Tester consists of a balanced pendulum pivoted at its center of gravity on two jewel bearings and provided with pins at different distances for attaching weights below the center of pivot. The lower end of the pendulum is fitted with a pointer which moves parallel to a scale mounted over the base of the instrument. The scale is graduated in both left and right directions. The upper end of the pendulum terminates in a triangular vane. The specimen presses against this vane and causes the pendulum to deflect when the test is conducted.