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Long description

równowaga higroskopijna - polega na tym, że w każdej temperaturze i każdej względnej wilgotności powietrza odpowiada określona wilgotność równoważna drewna. Drewno wilgotne o zbyt wysokiej wilgotności odparowuje nadmiar wilgoci (desorpcja), wysycha i kurczy się; drewno o zbyt niskiej wilgotności uzupełnia niedobór wilgoci pobierając parę wodną z powietrza (adsorpcja) i pęcznieje. W ujęciu fizycznym równowaga higroskopijna drewna jest to stan, w którym ciśnienie pary wodnej w drewnie jest równe ciśnieniu pary wodnej w powietrzu.
źródło : www.encyklopedialesna.pl
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