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Last Updated: Sep 09, 2025
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ASTM D8621-25e1
Standard Test Methods for Recovered Carbon Black—Ash Content
Standard Test Methods for Recovered Carbon Black—Ash Content
D8621-25E01
ASTM|D8621-25E01|en-US
Standard Test Methods for Recovered Carbon Black—Ash Content
Standard
D8621 Standard Test Methods for Recovered Carbon Black—Ash Content>
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BOS Vol. 09.01 Committee D36
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Significance and Use
4.1 The ash content of a rCB is the amount of non-carbon components present after combustion. Primary contributors to ash in rCB are zinc, silica, and other inorganic compounds that were present in the feedstock.
Scope
1.1 This test method covers the determination of the ash content of Recovered carbon black (rCB) using a Muffle Furnace. This test method has not been validated for blends of rCB with other substances, including furnace 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.