This instrument measures puncture resistance of various packing materials and gives reliable indication to evaluate fabrication factors with material values in a composition fashion. The puncture resistance of paperboards is measured as the energy required to force a puncture head of specific design through a test piece of board under specified condition. The test specimen is clamped between two horizontal plates in each of which is a triangular hole. The Puncture Tester has a very heavy chest iron stand in order to avoid disturbing vibrations during a test.
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