ASTM D1506-23

Standard Test Methods for Carbon Black—Ash Content

SIGNIFICANCE AND USE
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.
SCOPE
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements see Sections 6 and 13.  
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.

General Information

• Status: Published
• Publication Date: 30-Apr-2023
• ICS: 83.040.20 - Rubber compounding ingredients
• Technical Committee: D24 - Carbon Black
• Drafting Committee: D24.31 - Non-Carbon Black Components of Carbon Black

Standards Content (Sample)

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.
Designation: D1506 − 23
Standard Test Methods for
1
Carbon Black—Ash Content
This standard is issued under the fixed designation D1506; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 4. Significance and Use
1.1 These test methods cover the determination of the ash 4.1 The ash content of a carbon black is the amount of
content of carbon black. non-carbon components present after combustion. Primary
contributants to ash are the manufacturing process water and
1.2 The values stated in SI units are to be regarded as
the catalyst in the feedstock.
standard. No other units of measurement are included in this
standard.
Method A—Muffle Furnace Method
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Apparatus
responsibility of the user of this standard to establish appro-
5.1 Muffle Furnace, capable of temperature regulation of
priate safety, health, and environmental practices and deter-
625°C at 550°C, including capability of air exchange.
mine the applicability of regulatory limitations prior to use.
5.2 Crucibles:
For specific precautionary statements see Sections 6 and 13.
5.2.1 Porcelain Crucible, high-form, size O, rim 35 mm,
1.4 This international standard was developed in accor-
3
height 29 mm, capacity 15 cm , with cover size E.
dance with internationally recognized principles on standard-
5.2.2 Porous Quartz Fiber Crucible, 20, 50, and 100 mL
ization established in the Decision on Principles for the
3
with optional disk inserts and lids.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical 5.3 Analytical Balance, having a sensitivity of 0.1 mg.
Barriers to Trade (TBT) Committee.
5.4 Desiccator.
2. Referenced Documents
5.5 Oven, gravity-convection type, capable of temperature
2
regulation within 61°C at 125°C and temperature uniformity
2.1 ASTM Standards:
within 65°C.
D1799 Practice for Carbon Black—Sampling Packaged
Shipments
6. Hazards
D1900 Practice for Carbon Black—Sampling Bulk Ship-
ments
6.1 Precautions:
D4483 Practice for Evaluating Precision for Test Method
6.1.1 Open, if available, adjustable air inlets – for example,
Standards in the Rubber and Carbon Black Manufacturing
integrated in the door – to ensure a continuous stream of air
Industries
passing through the furnace to support the combustion.
6.1.2 Exert care in removing ashed sample from furnace to
3. Summary of Test Method
desiccator.
3.1 A pre-dried sample (1 h at 125°C) is weighed before and
6.1.3 Always keep the cover on the crucible when transfer-
after combustion for 16 h at 550°C. The remaining ash is
ring it to and from the desiccator to prevent the loss of ash due
weighed and calculated as a percent of the dried sample.
to air currents.
6.1.4 After the sample has cooled in the desiccator, admit air
1
These test methods are under the jurisdiction of ASTM Committee D24 on
slowly to avoid loss of ash from the crucible.
Carbon Black and are the direct responsibility of Subcommittee D24.31 on
Non-Carbon Black Components of Carbon Black.
Current edition approved May 1, 2023. Published May 2023. Originally
3
approved in 1957. Last previous edition approved in 2020 as D1506 – 15 (2020). The sole source of supply of the apparatus (quartz ashing dishes, Part Number
DOI: 10.1520/D1506-23. 303040) known to the committee at this time is CEM Corporation, P.O. Box 200,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Matthews, NC 28106. If you are aware of alternative suppliers, please provide this
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM information to ASTM International Headquarters. Your comments will receive
1
Standards volume information, refer to the standard’s Document Summary page on careful consideration at a meeting of the responsible technical committee, which
the ASTM website. you may attend.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D1506 − 23
7. Sampling ticular materials and the specific testing protocols of the test
method. Any appropriate value may be used from Table 1.
7.1 Samples shall be taken in accordance with Practices
D1799 or D1900. 11.3 A type
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D1506 − 15 (Reapproved 2020) D1506 − 23
Standard Test Methods for
1
Carbon Black—Ash Content
This standard is issued under the fixed designation D1506; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use. For specific precautionary statements see Sections 6 and 13.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D1799 Practice for Carbon Black—Sampling Packaged Shipments
D1900 Practice for Carbon Black—Sampling Bulk Shipments
D4483 Practice for Evaluating Precision for Test Method Standards in the Rubber and Carbon Black Manufacturing Industries
3. Summary of Test Method
3.1 A pre-dried sample (1 h at 125°C) is weighed before and after combustion for 16 h at 550°C. The remaining ash is weighed
and calculated as a percent of the dried sample.
4. Significance and Use
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
These test methods are under the jurisdiction of ASTM Committee D24 on Carbon Black and are the direct responsibility of Subcommittee D24.31 on Non-Carbon Black
Components of Carbon Black.
Current edition approved Nov. 1, 2020May 1, 2023. Published December 2020May 2023. Originally approved in 1957. Last previous edition approved in 20152020 as
D1506 – 15.D1506 – 15 (2020). DOI: 10.1520/D1506-15R20.10.1520/D1506-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D1506 − 23
Method A—Muffle Furnace Method
5. Apparatus
5.1 Muffle Furnace, capable of temperature regulation of 625°C at 550°C. 550°C, including capability of air exchange.
5.2 Crucibles:
3
5.2.1 Porcelain Crucible, high-form, size O, rim 35 mm, height 29 mm, capacity 15 cm , with cover size E.
3
5.2.2 Porous Quartz Fiber Crucible, 20, 50, and 100 mL with optional disk inserts and lids.
5.3 Analytical Balance, having a sensitivity of 0.1 mg.
5.4 Desiccator.
5.5 Oven, gravity-convection type, capable of temperature regulation within 61°C at 125°C and temperature uniformity within
65°C.
6. Hazards
6.1 Precautions:
6.1.1 Keep the door of the furnace open about 6 mm to admit air Open, if available, adjustable air inlets – for example, integrated
in the door – to ensure a continuous stream of air passing through the furnace to support the combustion of organic
material.combustion.
6.1.2 Exert care in removing ashed sample from furnace to desiccator.
6.1.3 Always keep the cover on the crucible when transferring it to and from the desiccator to prevent the loss of ash due to air
currents.
6.1.4 After the sample has cooled in the desiccator, admit air slowly to avoid loss of ash from the crucible.
7. Sampling
7.1 Samples shall be taken in accordance with Practices D1799 or D1900.
8. Procedure
8.1 Porous quartz fiber crucibles and optional disks should be ignited in the furnace at 550 6 25°C for at least 15 min. Porcelain
crucibles should be ignited with cover in the muffle furnace at 550 6 25°C for 1 h. Place the crucible and cov
...