Textile fibres — Determination of length and length distribution of staple fibres (by measurement of single fibres)
NORMA vydaná dňa 1.5.1981
Označenie normy: ISO 6989:1981
Dátum vydania normy: 1.5.1981
Počet strán: 6
Približná hmotnosť: 18 g (0.04 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy ISO
Description / Abstract: Specifies three methods for determination - method A: on a straightened fibre on a graduated rule, under a light tension applied with the aid of forceps and grease; - method B: measurement, using an opisometer, of the length of the image of fibre enlarged by projection on a screen; - method C: by use of a semi-mechanical device. - Intended to replace two existing International Standard, ISO 270 and ISO 1822.