# ISO 137:1975 — Withdrawn and superseded ISO standards

For ISO 137:1975, item title is Wool — Determination of fibre diameter — Projection microscope method; status code is 9599; successor is ISO 137:2015; withdrawn / published date is 1975-02-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 137:1975 _(verified: appears in the quote below)_
- **Item title:** Wool — Determination of fibre diameter — Projection microscope method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 137:2015
- **Withdrawn / published date:** 1975-02-01 _(verified: appears in the quote below)_

## What the source says

> 3950,IS,,ISO 137:1975,Wool — Determination of fibre diameter — Projection microscope method,Laine — Détermination du diamètre des fibres — Méthode du microscope à projection,1975-02-01,1,['59.060.10'],ISO/TC 38/SC 23,9599,,[61688],"['en','fr']",7,<p>Projection on a screen of the magnified images of the profiles of wool fibre pieces and measurement of their width by means of a graduated scale. The operating technique assures a random sampling of the fibres to be measured. Suitable for wool fibres in any form and also for other fibres of reasonably circular cross-section.</p>

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).