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One complete oscillation of a test piece, during which is fold first backwards and then forwards about the same line and this oscillation is double fold. Two horizontal opposed and moveable clamping jaws, which hold specimen 100 mm (4 inche) long under variable tension during the folding cycle, while a slotted folding blade, sliding back and forth between four creasing roller, folds the paper at 120 double fold per minute One or two specimen can be tested simultaneously. The number of fold is registered by two impulse/ digital counter which are stopped automatically, when the specimen breaks. The Equipment is used for determining the Folding Endurance of all kind of paper, foil and films upto 0.25 mm or less.