ISO 3858-2:1990

Carbon black for use in the rubber industry — Determination of light transmittance of toluene extract — Part 2: Method for product evaluation

Measures the discoloration caused by the extracted matter, as required in product evaluation. The degree of discoloration is quantitatively measured by means of a spectrometer. The method is applicable to high-extract thermal-type blacks. Part 1 refers to a rapid method. – Replaces the first edition (ISO 3858/2-1982).