# ISO 291:1997 — Withdrawn and superseded ISO standards

For ISO 291:1997, item title is Plastics — Standard atmospheres for conditioning and testing; status code is 9599; successor is ISO 291:2005; withdrawn / published date is 1997-07-24, recorded from its source on 2026-08-05.

- **Identifier:** ISO 291:1997 _(verified: appears in the quote below)_
- **Item title:** Plastics — Standard atmospheres for conditioning and testing _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 291:2005
- **Withdrawn / published date:** 1997-07-24 _(verified: appears in the quote below)_

## What the source says

> 25543,IS,,ISO 291:1997,Plastics — Standard atmospheres for conditioning and testing,Plastiques — Atmosphères normales de conditionnement et d'essai,1997-07-24,2,['83.080.01'],ISO/TC 61/SC 6,9599,[4215],[38242],"['en','fr']",6,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).