# ISO 6588:1981 — Withdrawn and superseded ISO standards

For ISO 6588:1981, item title is Paper, board and pulps — Determination of pH of aqueous extracts; status code is 9599; successor is ISO 6588-1:2005 | ISO 6588-2:2005; withdrawn / published date is 1981-04-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 6588:1981 _(verified: appears in the quote below)_
- **Item title:** Paper, board and pulps — Determination of pH of aqueous extracts _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 6588-1:2005 | ISO 6588-2:2005
- **Withdrawn / published date:** 1981-04-01 _(verified: appears in the quote below)_

## What the source says

> 12994,IS,,ISO 6588:1981,"Paper, board and pulps — Determination of pH of aqueous extracts","Papier, carton et pâtes — Détermination du pH des extraits aqueux",1981-04-01,1,"['85.060','85.040']",ISO/TC 6,9599,,"[41368,41369]","['en','fr']",3,"<p>Is applicable to all kinds of paper, board and pulps yielding an extract having a conductivity exceeding 0.2 mS/m when determined in accordance with ISO 6587, except for papers used for electrical purposes. For high purity papers used for electrical purposes, the method should be that given in IEC Publication 554-2.</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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).