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Experimental study observes variable photosensitive water vapour adsorption in wool across low relative humidity, highlighting reproducibility challenges and potential electrostatic mechanisms.
Further cxperimental work on the photosensitivity of the adsorption of water vapour on wool within the range of atmospheric relative humidity of 5–20% is described, and details are given of the differences in behaviour of samples conditioned on the adsorption and desorption isotherms. Details of discussions with the Wool Industries Research Association concerning the phenomenon are given, together with a suggested altemative electrostatic explanation of the phenomenon. Difficulties encountered in subsequent attempts to reproduce the earlier experiments are described. There appears to be some factor, at present unknown, which controls the appearance or non‐appearance of the effect.
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Bright et al. (1948) studied this question.
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