ISO 6989:1981

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

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ISO 6989:1981

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

PUBLISH DATE 1981
ISO 6989:1981

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 Standards, ISO 270 and ISO 1822.

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