4.1 The ash content of a carbon black is the amount of non-carbon components present after combustion. Primary contributants to ash are the manufacturing process water and the catalyst in the feedstock.

1.1 These test methods cover the determination of the ash content of carbon black.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements see Sections 6 and 13.