Fibre length and microfibril angle in silver birch (Betula pendula Roth)

A comparative study was carried out on fibre length and microfibril angle in Betula pendula Roth. Fibre length increased and microfibril angle decreased from pith to bark. Microfibril angle remained constant from the 15(th) annual ring from the pith, to the outermost ring. Fibre length also reached a maximum length at this point although there were some differences at the 30(th) ring from the pith.