本文件规定了测定纺织纤维线密度的重量法和振动计法，分别适用于: a） 成束的纤维； b） 单个纤维。 可以获得人造纤维的有用数据，而天然纤维的数据精度较低。 本文件仅适用于在试验准备过程中可以保持笔直的纤维，如果纤维束平行。当纤维易于卷曲时，它适用。 本文件中的方法不适用于锥形纤维。 振镜法并不总是适用于中空和扁平（带状）纤维。

This document specifies a gravimetric method and a vibroscope method for the determination of the linear density of textile fibres applicable respectively to: a) bundles of fibres; b) individual fibres. Useful data can be obtained on man-made fibres and, with less precision, on natural fibres. This document only applies to fibres which can be kept straight and, in the case of bundles, parallel, during test preparation. It is properly applicable when the fibres are readily freed of crimp. The methods in this document are not applicable to tapered fibres. The vibroscope method is not always applicable to hollow and flat (ribbon-like) fibres.