# ISO 1600:1975 — Withdrawn and superseded ISO standards For ISO 1600:1975, item title is Plastics — Cellulose acetate — Determination of light absorption before and after heating; status code is 9599; successor is ISO 1600:1990; withdrawn / published date is 1975-06-01, recorded from its source on 2026-08-05. - **Identifier:** ISO 1600:1975 _(verified: appears in the quote below)_ - **Item title:** Plastics — Cellulose acetate — Determination of light absorption before and after heating _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 1600:1990 - **Withdrawn / published date:** 1975-06-01 _(verified: appears in the quote below)_ ## What the source says > 6195,IS,,ISO 1600:1975,Plastics — Cellulose acetate — Determination of light absorption before and after heating,Matières plastiques — Acétate de cellulose — Détermination de l'absorption de lumière avant et après chauffage,1975-06-01,1,['83.080.20'],ISO/TC 61/SC 9,9599,,[6196],"['en','fr']",4, ## 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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).