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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Coefficient of friction for the seven different papers at three different relative humidities (RH = 32, 50, and 83%) measured at: (a) the palm of the hand; (b) the ventral forearm.