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ISO 6989:1981

Textile fibres — Determination of length and length distribution of staple fibres (by measurement of single fibres) ISO 6989:1981

Publication date:   May 1, 1981

General information

90.60   Close of review   Jun 5, 2026

ISO

ISO/TC 38/SC 23 Fibres and yarns

International Standard

59.060.01   Textile fibres in general

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Published

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 270:1975

WITHDRAWN
ISO 1822:1973

NOW

PUBLISHED
ISO 6989:1981
90.60 Close of review
Jun 5, 2026




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