Five cotton samples were tested for 3.2 mm-gauge tenacity and elongation five times daily as relative humidities (RH) were cycled within the limits of 70 and 48%. Tenacity and elongation responded almost instantaneously to changes in RH. In a controlled laboratory maintained at a standard atmosphere of 70 ± 2°F and 65 ± 2% RH, up to 4% range in tenacity and in elongation may be expected due to the oscillating RH alone.
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