ASTM D3265-17a
(Test Method)Standard Test Method for Carbon Black—Tint Strength
Standard Test Method for Carbon Black—Tint Strength
SIGNIFICANCE AND USE
4.1 For the broad range of commercial rubber grade carbon blacks, tint strength is highly dependent upon particle size. Tint strength can be used as an indication of particle size; however, tint strength is also dependent on structure and aggregate size distribution. Therefore, differences in tint strength within grades of carbon black may reflect differences other than particle size.
Note 1: This test method was developed primarily for the characterization of N100, N200, and N300 series carbon blacks.
4.2 Tint strength values within the carbon black industry have been developed using a Automatic Muller apparatus which is used to prepare carbon black-zinc oxide pastes. A new mixing apparatus, SpeedMixer4 (DAC 150 FVZ), and a corresponding procedure have been extensively studied within D24 and shown to provide equivalent tint strength for all carcass or soft blacks and most tread blacks with the exception of higher surface area N100 types and specialty blacks. Therefore, it is the responsibility of the user of this alternate apparatus to ensure their products will adequately disperse. Disputes arising between a user and producer should be resolved using the Automatic Muller apparatus until ASTM develops adequate precision statements.
4.3 The term ITRB is used in the entire text for both, the original ITRB, used as the first reference material for tint testing, but which is now used up, and the successor reference material, ITRB2. Wherever required, like in calculations where it is crucial to differentiate between the original ITRB and ITRB2, this will be clearly mentioned in the text of the test procedure.
SCOPE
1.1 This test method covers the determination of the tint strength of carbon black relative to an industry tint reference black (ITRB).
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.
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Designation: D3265 − 17a
Standard Test Method for
1
Carbon Black—Tint Strength
This standard is issued under the fixed designation D3265; 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 to produce a black or gray paste. This paste is then spread to
produce a surface suitable for measuring the reflectance of the
1.1 This test method covers the determination of the tint
mixture by means of a photo-electric reflectance meter. The
strength of carbon black relative to an industry tint reference
reflectance of the tested sample is then compared to the
black (ITRB).
reflectance of the ITRB prepared in the same manner. The tint
1.2 The values stated in SI units are to be regarded as the
strength of the tested sample is expressed as units of the
standard. The values given in parentheses are for information
reflectance of the ITRB divided by the reflectance of the
only.
sample and multiplied by 100.
1.3 This standard does not purport to address all of the
3.2 Correction Factor:
safety concerns, if any, associated with its use. It is the
3.2.1 When ITRB-2, Paraplex G-62 (made before June
responsibility of the user of this standard to establish appro-
2012) and ZnO lot#8 are used, apply a correction factor of
priate safety, health, and environmental practices and deter-
1.0134 for the calibration and standardization in Section 8.
mine the applicability of regulatory limitations prior to use.
3.2.2 There should be no correction applied when ITRB is
1.4 This international standard was developed in accor-
used with Paraplex G-62 and ZnO Lot#8 or earlier, that is, the
dance with internationally recognized principles on standard-
correction factor is “1”.
ization established in the Decision on Principles for the
3.2.3 There should be no correction applied in the calcula-
Development of International Standards, Guides and Recom-
tion in Section 10 when using the currently available tint raw
mendations issued by the World Trade Organization Technical
materials (see Section 6) for pastes prepared with either ITRB
Barriers to Trade (TBT) Committee. 3
or ITRB2, that is, the correction factor is “1”.
2. Referenced Documents
4. Significance and Use
2
2.1 ASTM Standards:
4.1 For the broad range of commercial rubber grade carbon
D1799 Practice for Carbon Black—Sampling Packaged
blacks,tintstrengthishighlydependentuponparticlesize.Tint
Shipments
strength can be used as an indication of particle size; however,
D1900 Practice for Carbon Black—Sampling Bulk Ship-
tint strength is also dependent on structure and aggregate size
ments
distribution. Therefore, differences in tint strength within
D4483 Practice for Evaluating Precision for Test Method
grades of carbon black may reflect differences other than
Standards in the Rubber and Carbon Black Manufacturing
particle size.
Industries
D4821 Guide for Carbon Black—Validation of Test Method
NOTE 1—This test method was developed primarily for the character-
Precision and Bias ization of N100, N200, and N300 series carbon blacks.
3. Summary of Test Method
3
3.1 A carbon black sample is mixed with a white powder
In 2013 issues were reported when using Paraplex G-62 purchased after June
2012 and ZnO Lot#10. An ASTM task group investigated the issues and found the
(zincoxide)andaliquidvehicle(epoxidizedsoybeanoil,ESO)
following raw materials acceptable for Tint testing:
1) ESO: Paraplex G-62 purchased before June 2012 or currently available
1
This test method is under the jurisdiction ofASTM Committee D24 on Carbon GreenChem Greenflex 7170, lot 590911X24, and
Black and is the direct responsibility of Subcommittee D24.21 on Carbon Black 2) zinc oxide Lot#8 or earlier, and currently available ZnO lot#11.
Surface Area and Related Properties. Itishighlyrecommendedtoonlyusetheserawmaterialsidentifiedasacceptable
Current edition approved Sept. 1, 2017. Published October 2017. Originally asothersourcesmayleadtounacceptabledifferencesinthetestresults.Thetinttask
ε1
approved in 1973. Last previous edition approved in 2017 as D3265 – 17 . DOI: group has determined that Paraplex G-62 with lot numbers that begin with the digit
10.1520/D3265-17A. 5 and zinc oxide lots 9 and 10 are suspect and may not give acceptable results.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or When using the new raw materials for tint testing some differences may be
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM observedwithvariousgradesofcarbonblackcomparedwithhistoricaldata.Forthis
Standards volume information, refer to the standard’s Document Summary page on reason
...
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: D3265 − 17 D3265 − 17a
Standard Test Method for
1
Carbon Black—Tint Strength
This standard is issued under the fixed designation D3265; 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—Editorially corrected footnote 15 in August 2017.
1. Scope
1.1 This test method covers the determination of the tint strength of carbon black relative to an industry tint reference black
(ITRB).
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:
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
D4821 Guide for Carbon Black—Validation of Test Method Precision and Bias
3. Summary of Test Method
3.1 A carbon black sample is mixed with a white powder (zinc oxide) and a liquid vehicle (epoxidized soybean oil, ESO) to
produce a black or gray paste. This paste is then spread to produce a surface suitable for measuring the reflectance of the mixture
by means of a photo-electric reflectance meter. The reflectance of the tested sample is then compared to the reflectance of the ITRB
prepared in the same manner. The tint strength of the tested sample is expressed as units of the reflectance of the ITRB divided
by the reflectance of the sample and multiplied by 100.
3.2 Correction Factor:
3.2.1 When ITRB-2, Paraplex G-62 (made before June 2012) and ZnO lot#8 are used, apply a correction factor of 1.0134 for
the calibration and standardization in Section 8.
3.2.2 There should be no correction applied when ITRB is used with Paraplex G-62 and ZnO Lot#8 or earlier, that is, the
correction factor is “1”.
1
This test method is under the jurisdiction of ASTM Committee D24 on Carbon Black and is the direct responsibility of Subcommittee D24.21 on Carbon Black Surface
Area and Related Properties.
Current edition approved May 1, 2017Sept. 1, 2017. Published May 2017October 2017. Originally approved in 1973. Last previous edition approved in 20152017 as
ε1
D3265 – 15a.D3265 – 17 . DOI: 10.1520/D3265-17E01.10.1520/D3265-17A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. 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
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D3265 − 17a
3.2.3 There should be no correction applied in the calculation in Section 10 when using the currently available tint raw materials
3
(see Section 6) for pastes prepared with either ITRB or ITRB2, that is, the correction factor is “1”.
4. Significance and Use
4.1 For the broad range of commercial rubber grade carbon blacks, tint strength is highly dependent upon particle size. Tint
strength can be used as an indication of particle size; however, tint strength is also dependent on structure and aggregate size
distribution. Therefore, differences in tint strength within grades of carbon black may reflect differences other than particle size.
NOTE 1—This test method was developed primarily for the characterization of N100, N200, and N300 series carbon blacks.
4.2 Tint strength values within the carbon black industry have been developed using a Automatic Muller apparatus which is used
4
to prepare carbon black-zinc oxide pastes. A new mixing apparatus, SpeedMixer (DAC 150 FVZ), and a correspon
...
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