Folding Endurance Tester (SCHOPPER TYPE) Two horizontally opposed and movable clamping jaws, which hold specimen 100 mm (4 inch) long under varaible tension during the folding cycle,while a slotted folding blade sliding back and forth between four creasing rollers,folds the paper at 105-125 double fold per minute.Loading clamps of spring type giving standard load of 1000 gm during the test,counter register the number of double fold &stop the instrument when the specimen break.one complete oscillation of the test piece, during which it is folded first backwards and then forwards about the same line and this oscillation is double fold.

Folding Endurance Tester (SCHOPPER TYPE) Two horizontally opposed and movable clamping jaws, which hold specimen 100 mm (4 inch) long under varaible tension during the folding cycle,while a slotted folding blade sliding back and forth between four creasing rollers,folds the paper at 105-125 double fold per minute.Loading clamps of spring type giving standard load of 1000 gm during the test,counter register the number of double fold &stop the instrument when the specimen break.one complete oscillation of the test piece, during which it is folded first backwards and then forwards about the same line and this oscillation is double fold.