This document 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 matter present on the surface of the carbon black.
This method might not be applicable to carbon blacks with a high extractable-matter content.th edition 2018-05 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 Reference number ISO 3858:2018(E) ？ ISO 2018 ISO 3858:2018(E) COPYRIGHT PROTECTED DOCUMENT ？ ISO 2018 Al