# ISO 1136:1976 — Withdrawn and superseded ISO standards

For ISO 1136:1976, item title is Wool — Determination of mean diameter of fibres — Air permeability method; status code is 9599; successor is ISO 1136:2015; withdrawn / published date is 1976-11-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 1136:1976 _(verified: appears in the quote below)_
- **Item title:** Wool — Determination of mean diameter of fibres — Air permeability method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 1136:2015
- **Withdrawn / published date:** 1976-11-01 _(verified: appears in the quote below)_

## What the source says

> 5674,IS,,ISO 1136:1976,Wool — Determination of mean diameter of fibres — Air permeability method,Laine — Détermination du diamètre moyen des fibres — Méthode perméamétrique,1976-11-01,1,['59.060.10'],ISO/TC 38/SC 23,9599,,[61689],"['en','fr']",8,<p>The air permeability test method is based on the Kozeny equation. Weighed fibres (test specimen) are introduced in a measuring chamber with known volume. Air is passed through this test specimen. A scale indicating variations in permeability of air may be calibrated in appropriate absolute units of rate of flow or pressure difference and a table or graph is provided for conversion of the observed reading into values of mean diameter of the measure

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).