Improved Microtechnique for Wood Tensile Strength and Related Properties

A discussion is presented of the techniques to prepare microtensile test specimens, which shows that a 2.5 by 100 mm rectangular section 100 microns thick is an improvement over the necked down specimen previously reported. Also discussed are the means for controlling moisture content while testing, and for measuring microspecific gravity of the tested specimen. Special grips for the testing machine were developed by using stiff rubber facings on the jaws and a torque wrench for tightening, so the test specimen would not tend to fail at the grips due to crushing.

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