# ISO 3688:1977/Amd 1:1980 — Withdrawn and superseded ISO standards

For ISO 3688:1977/Amd 1:1980, item title is Pulps — Measurement of diffuse blue reflectance factor (ISO brightness) — Amendment 1; status code is 9599; successor is ISO 3688:1999; withdrawn / published date is 1980-12-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 3688:1977/Amd 1:1980 _(verified: appears in the quote below)_
- **Item title:** Pulps — Measurement of diffuse blue reflectance factor (ISO brightness) — Amendment 1 _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 3688:1999
- **Withdrawn / published date:** 1980-12-01 _(verified: appears in the quote below)_

## What the source says

> 9156,IS,Amd,ISO 3688:1977/Amd 1:1980,Pulps — Measurement of diffuse blue reflectance factor (ISO brightness) — Amendment 1,Pâtes — Mesurage du facteur de réflectance diffuse dans le bleu (degré de blancheur ISO) — Amendement 1,1980-12-01,1,['85.040'],ISO/TC 6,9599,,[9155],"['en','fr']",2,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).