ASTM D1618

Carbon Black Extractables—Transmittance of Toluene Extract

Applicability: ASTM D1618 is the standard test method for measuring the transmittance of toluene extract from carbon black, which estimates the amount of toluene-soluble, discoloring residues (extractables) present. It is primarily applicable for controlling carbon black production processes, although it may not be suitable for high-extractable carbon black grades.

Purpose: The purpose of ASTM D1618 is to measure the degree of toluene discoloration by extractables, providing an estimate of extractable material. It is critical for controlling reaction processes during the production of carbon black.