Fig. 8From: Impact of solar radiation on chemical structure and micromechanical properties of cellulose-based humidity-sensing material CottonidUltra-micro-hardness measurements on surface of industrial Cottonid material (Ernst Krueger) in different aging stages: a Force (F) - indentation depth (h) curves, and b Obtained values for Martens hardness HM and indentation modulus EitBack to article page