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ISO 6989:1981

Textile fibres -- Determination of length and length distribution of staple fibres (by measurement of single fibres)

General information
Valid from 01.05.1981
Directives or regulations
None

Standard history

Status
Date
Type
Name
01.05.1981
Main
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.
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