# ISO 3858:2004 — Withdrawn and superseded ISO standards For ISO 3858:2004, item title is Rubber compounding ingredients — Carbon black — Determination of light transmittance of toluene extract; status code is 9599; successor is ISO 3858:2008; withdrawn / published date is 2004-05-27, recorded from its source on 2026-08-05. - **Identifier:** ISO 3858:2004 _(verified: appears in the quote below)_ - **Item title:** Rubber compounding ingredients — Carbon black — Determination of light transmittance of toluene extract _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 3858:2008 - **Withdrawn / published date:** 2004-05-27 _(verified: appears in the quote below)_ ## What the source says > 36691,IS,,ISO 3858:2004,Rubber compounding ingredients — Carbon black — Determination of light transmittance of toluene extract,Ingrédients de mélange du caoutchouc — Noir de carbone — Détermination de la transmittance spectrale de l'extrait toluénique,2004-05-27,2,['83.040.20'],ISO/TC 45/SC 3,9599,"[9442,9444]",[51675],"['en','fr']",6,"

ISO 3858:2004 specifies a method for the determination of the light transmittance of the toluene extract from carbon black for use in the rubber industry, as a means of measuring the discolouration caused by the extractable matter.

The light transmittance value provides an estimate of the degree of discolouration caused by the toluene-extractable mat ## 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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).