ASTM D6915-07

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D6915 − 07
StandardPractice for
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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 3.2 This practice is to be used to establish the average
physicochemical properties of a set of carbon blacks to be used
1.1 This practice covers guidelines for the production and
as SRBs.
testing for uniformity of a set of carbon blacks to be used as
Standard Reference Blacks (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
1.2 The values stated in SI units are to be regarded as the
for each test and as nearly evenly spaced across the range as
standard. The values given in parentheses are for information
possible. Typically, the carbon black grades selected consist of
only.
threetread(hard)typefurnacegrades(designatedA,B,andC),
1.3 This standard does not purport to address all of the
three carcass (soft) type furnace grades (designated D, E, and
safety concerns, if any, associated with its use. It is the
F), and one thermal type grade (designated G). Subcommittee
responsibility of the user of this standard to establish appro-
D24.61 may elect to carry one or more of the existing SRBs
priate safety and health practices and determine the applica-
into the next set provided there is enough remaining material at
bility of regulatory limitations prior to use.
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
2. Referenced Documents
tests will have an SRB set that is evenly spaced across the
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2.1 ASTM Standards:
range of interest. All the SRB candidates are produced at
D1510 Test Method for Carbon Black—Iodine Adsorption
approximately the same time by the various producers. They
Number
are used as a set once they are approved. The sets are
D2414 Test Method for Carbon Black—Oil Absorption
consecutively numbered. Values and identification for the
Number (OAN)
current set are given in Guide D4821. Any SRBs carried
D3265 Test Method for Carbon Black—Tint Strength
forward will be renumbered for the new set.
D3493 Test Method for Carbon Black—Oil Absorption
Number of Compressed Sample (COAN) 4. Production, Quality Control, and Quality Assurance
D4483 Practice for Evaluating Precision for Test Method
4.1 It is assumed that manufacturers of the SRBs will use
Standards in the Rubber and Carbon Black Manufacturing
state-of-the-art techniques to ensure maximum uniformity
Industries
throughout the entire production run.The production should be
D4821 Guide for Carbon Black—Validation of Test Method
made in one continuous production and packaging lot run. The
Precision and Bias
testing called for in this practice is not intended to be a
D6556 Test Method for Carbon Black—Total and External
substitute for in-process quality control. This interlaboratory
Surface Area by Nitrogen Adsorption
study is only adequate to verify the quality of a homogeneous
lot.
3. Significance and Use
4.2 The size of the lot for each SRB is determined by
3.1 This practice is intended to ensure that SRBs are
historical records on the rate of use. The lot should have an
produced and evaluated by a standard procedure.
expected life of about five years at the most recent rate of use.
Historically, the lot size has usually been 10 000 lb.
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This practice is under the jurisdiction of ASTM Committee D24 on Carbon
5. Uniformity Sampling and Testing
Black and is the direct responsibility of Subcommittee D24.61 on Carbon Black
Sampling and Statistical Analysis.
5.1 It is the producer’s responsibility to ensure the SRB is
Current edition approved May 1, 2007. Published June 2007. Originally
produced under stable conditions using good statistical process
approved in 2003. Last previous edition approved in 2005 as D6915 – 05b. DOI:
control techniques.
10.1520/D6915-07.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.2 The producer shall maintain all test equipment in proper
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
calibration and be able to supply proof of calibration records,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. if requested.
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D6915 − 07
5.3 The producer of the SRB shall be responsible for 6.3.1.6
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