ASTM D6915-23

Standard Practice for Carbon Black—Evaluation of Standard Reference Blacks

SIGNIFICANCE AND USE
3.1 This practice is intended to ensure that SRBs are produced and evaluated by a standard procedure.  
3.2 This practice is to be used to establish the average physicochemical properties of a set of carbon blacks to be used as SRBs.  
3.3 The carbon black grades to be used as SRBs should be selected to give as much coverage of the typical usage range for each test and as nearly evenly spaced across the range as possible. Typically, the carbon black grades selected consist of three tread (hard) type furnace grades (designated A, B, and C), three carcass (soft) type furnace grades (designated D, E, and F), and one thermal type grade (designated G). Subcommittee D24.61 may elect to carry one or more of the existing SRBs into the next set provided there is enough remaining material at the rate of usage to last through the expected life of the next set. Limiting the choice of grades to be used means that not all tests will have an SRB set that is evenly spaced across the range of interest. All the SRB candidates are produced at approximately the same time by the various producers. They are used as a set once they are approved. The sets are consecutively numbered. Values and identification for the current set are given in Guide D4821. Any SRBs carried forward will be renumbered for the new set.
SCOPE
1.1 This practice covers guidelines for the production and testing for uniformity of a set of carbon blacks to be used as Standard Reference Blacks (SRBs).  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
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.

General Information

• Status: Published
• Publication Date: 31-May-2023
• ICS: 83.040.20 - Rubber compounding ingredients
• Technical Committee: D24 - Carbon Black
• Drafting Committee: D24.61 - Carbon Black Sampling and Statistical Analysis

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: D6915 − 23
Standard Practice for
1
Carbon Black—Evaluation of Standard Reference Blacks
This standard is issued under the fixed designation D6915; 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.
1. Scope D6556 Test Method for Carbon Black—Total and External
Surface Area by Nitrogen Adsorption
1.1 This practice covers guidelines for the production and
D8043 Guide for Carbon Black—Shelf Life
testing for uniformity of a set of carbon blacks to be used as
Standard Reference Blacks (SRBs).
3. Significance and Use
1.2 The values stated in SI units are to be regarded as the
3.1 This practice is intended to ensure that SRBs are
standard. The values given in parentheses are for information
produced and evaluated by a standard procedure.
only.
3.2 This practice is to be used to establish the average
1.3 This standard does not purport to address all of the
physicochemical properties of a set of carbon blacks to be used
safety concerns, if any, associated with its use. It is the
as SRBs.
responsibility of the user of this standard to establish appro-
3.3 The carbon black grades to be used as SRBs should be
priate safety, health, and environmental practices and deter-
selected to give as much coverage of the typical usage range
mine the applicability of regulatory limitations prior to use.
for each test and as nearly evenly spaced across the range as
1.4 This international standard was developed in accor-
possible. Typically, the carbon black grades selected consist of
dance with internationally recognized principles on standard-
three tread (hard) type furnace grades (designated A, B, and C),
ization established in the Decision on Principles for the
three carcass (soft) type furnace grades (designated D, E, and
Development of International Standards, Guides and Recom-
F), and one thermal type grade (designated G). Subcommittee
mendations issued by the World Trade Organization Technical
D24.61 may elect to carry one or more of the existing SRBs
Barriers to Trade (TBT) Committee.
into the next set provided there is enough remaining material at
2. Referenced Documents the rate of usage to last through the expected life of the next
2 set. Limiting the choice of grades to be used means that not all
2.1 ASTM Standards:
tests will have an SRB set that is evenly spaced across the
D1510 Test Method for Carbon Black—Iodine Adsorption
range of interest. All the SRB candidates are produced at
Number
approximately the same time by the various producers. They
D2414 Test Method for Carbon Black—Oil Absorption
are used as a set once they are approved. The sets are
Number (OAN)
consecutively numbered. Values and identification for the
D3265 Test Method for Carbon Black—Tint Strength
current set are given in Guide D4821. Any SRBs carried
D3493 Test Method for Carbon Black—Oil Absorption
forward will be renumbered for the new set.
Number of Compressed Sample (COAN)
D4483 Practice for Evaluating Precision for Test Method
4. Production, Packaging, Quality Control, and Quality
Standards in the Rubber and Carbon Black Manufacturing
Assurance
Industries
4.1 It is assumed that manufacturers of the SRBs will use
D4821 Guide for Carbon Black—Validation of Test Method
state-of-the-art techniques to ensure maximum uniformity
Precision and Bias
throughout the entire production run. The production should be
made in one continuous production and packaging lot run. The
testing called for in this practice is not intended to be a
1
This practice is under the jurisdiction of ASTM Committee D24 on Carbon
substitute for in-process quality control. This interlaboratory
Black and is the direct responsibility of Subcommittee D24.61 on Carbon Black
Sampling and Statistical Analysis.
study is only adequate to verify the quality of a homogeneous
Current edition approved June 1, 2023. Published June 2023. Originally
lot.
ε1
approved in 2003. Last previous edition approved in 2017 as D6915 – 17 . DOI:
10.1520/D6915-23.
4.2 The size of the lot for each SRB is determined by
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
historical records on the rate of use. The lot should have an
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
expected life of about five years at the most recent rate of use.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Historically, the lot size has usually been 10 000 lb
...

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.
´1
Designation: D6915 − 17 D6915 − 23
Standard Practice for
1
Carbon Black—Evaluation of Standard Reference Blacks
This standard is issued under the fixed designation D6915; 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.
1
ε NOTE—Corrected Fig. A1.2 editorially in August 2017.
1. Scope
1.1 This practice covers guidelines for the production and testing for uniformity of a set of carbon blacks to be used as Standard
Reference Blacks (SRBs).
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D1510 Test Method for Carbon Black—Iodine Adsorption Number
D2414 Test Method for Carbon Black—Oil Absorption Number (OAN)
D3265 Test Method for Carbon Black—Tint Strength
D3493 Test Method for Carbon Black—Oil Absorption Number of Compressed Sample (COAN)
D4483 Practice for Evaluating Precision for Test Method Standards in the Rubber and Carbon Black Manufacturing Industries
D4821 Guide for Carbon Black—Validation of Test Method Precision and Bias
D6556 Test Method for Carbon Black—Total and External Surface Area by Nitrogen Adsorption
D8043 Guide for Carbon Black—Shelf Life
3. Significance and Use
3.1 This practice is intended to ensure that SRBs are produced and evaluated by a standard procedure.
3.2 This practice is to be used to establish the average physicochemical properties of a set of carbon blacks to be used as SRBs.
1
This practice is under the jurisdiction of ASTM Committee D24 on Carbon Black and is the direct responsibility of Subcommittee D24.61 on Carbon Black Sampling
and Statistical Analysis.
Current edition approved May 1, 2017June 1, 2023. Published May 2017June 2023. Originally approved in 2003. Last previous edition approved in 20122017 as
ε1
D6915 – 12.D6915 – 17 . DOI: 10.1520/D6915-17E01.10.1520/D6915-23.
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

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D6915 − 23
3.3 The carbon black grades to be used as SRBs should be selected to give as much coverage of the typical usage range for each
test and as nearly evenly spaced across the range as possible. Typically, the carbon black grades selected consist of three tread
(hard) type furnace grades (designated A, B, and C), three carcass (soft) type furnace grades (designated D, E, and F), and one
thermal type grade (designated G). Subcommittee D24.61 may elect to carry one or more of the existing SRBs into the next set
provided there is enough remaining material at the rate of usage to last through the expected life of the next set. Limiting the choice
of grades to be used means that not all tests will have an SRB set that is evenly spaced across the range of interest. All the SRB
candidates are produced at approximately the same time by the various producers. They are used as a set once they are approved.
The sets are consecutively numbered. Values and identification for the current set are given in Guide D4821. Any SRBs carried
forward will be renumbered for the new set.
4. Production, Packaging, Quality Control, and Quality Assurance
4.1 It is assumed that manufacturers of the SRBs will use state-of-the-art techniques to ensure maximum uniformity throughout
the entire production run. The production should be made in one continuous production and packaging lot run. The t
...