Industrially produced panels were used for this investigation, in particular OSB
(18 mm thickness), particleboard (19 mm thickness) and medium density fiberboard
(19 mm thickness). According to the size of the various structuring elements
(strands, particles and fibers), different sample sizes were used for computed
tomography: for OSB 50 mm x 50 mm; for PB 30 mm x 30 mm; and for
MDF 4 mm x 4 mm; the samples were stored under standard climate conditions
(20 ° C, 65% rel. humidity) to constant weight.