BS ISO 2648:2020 pdf free.Wool-Determination of fibre length distribution parameters-Capacitance method. BS ISO 2648 1 Scope This document specifies a method for the determination of fibre length distribution parameters (principally mean length, expressed as Hauteur or Barbe, and the coefficient of variation of the measurement) on slivers and rovings made from combed wool or combed synthetic fibres. As the fibres...