ASTM D3265-23a

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. An alternative mixing apparatus, Hauschild SpeedMixer3,4 (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.
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.

General Information

• Status: Historical
• Publication Date: 31-Oct-2023
• ICS: 83.040.20 - Rubber compounding ingredients
• Technical Committee: D24 - Carbon Black
• Drafting Committee: D24.21 - Carbon Black Surface Area and Related Properties

Relations

• Replaces: ASTM D3265-23 - Standard Test Method for Carbon Black—Tint Strength
• Effective Date: 01-Nov-2023
• Referred By: ASTM D4821-20 - Standard Guide for Carbon Black—Validation of Test Method Precision and Bias
• Effective Date: 01-Nov-2023
• Referred By: ASTM D5817-20 - Standard Practice for Carbon Black, Pelleted—Reduction, Blending, and Drying of Gross Samples for Testing
• Effective Date: 01-Nov-2023
• Referred By: ASTM D3053-23 - Standard Terminology Relating to Carbon Black
• Effective Date: 01-Nov-2023
• Referred By: ASTM D1765-23a - Standard Classification System for Carbon Blacks Used in Rubber Products
• Effective Date: 01-Nov-2023
• Referred By: ASTM D7849-23 - Standard Classification for Nomenclature of Reference Materials of Committee D24
• Effective Date: 01-Nov-2023
• Referred By: ASTM D6915-23 - Standard Practice for Carbon Black—Evaluation of Standard Reference Blacks
• Effective Date: 01-Nov-2023
• Referred By: ASTM D4122-17(2023) - Standard Practice for Carbon Black—Evaluation of an Industry Reference Black
• Effective Date: 01-Nov-2023

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: D3265 − 23a
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. The test value is therefore
1.3 This standard does not purport to address all of the
expressed in %.
safety concerns, if any, associated with its use. It is the
3.2 Correction Factor:
responsibility of the user of this standard to establish appro-
3.2.1 A correction factor in Eq 3 is needed when raw
priate safety, health, and environmental practices and deter-
materials Paraplex G-62 and ZnO Lot#8 or earlier produced
mine the applicability of regulatory limitations prior to use.
before 2012, in combination with ITRB2, are used. For
1.4 This international standard was developed in accor-
additional details refer to ASTM D3265-17a.
dance with internationally recognized principles on standard-
3.2.2 There should be no correction applied when ITRB is
ization established in the Decision on Principles for the
used with Paraplex G-62 and ZnO Lot#8 or earlier.
Development of International Standards, Guides and Recom-
3.2.3 There should be no correction applied when using the
mendations issued by the World Trade Organization Technical
currently available tint raw materials (see Section 6) for pastes
Barriers to Trade (TBT) Committee.
prepared with either ITRB or ITRB2.
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, tint strength is highly dependent upon particle size. 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
NOTE 1—This test method was developed primarily for the character-
D4821 Guide for Carbon Black—Validation of Test Method
ization of N100, N200, and N300 series carbon blacks.
Precision and Bias
4.2 Tint strength values within the carbon black industry
3. Summary of Test Method
have been developed using a Automatic Muller apparatus
which is used to prepare carbon black-zinc oxide pastes. An
3.1 A carbon black sample is mixed with a white powder
3,4
(zinc oxide) and a liquid vehicle (epoxidized soybean oil, ESO) alternative mixing apparatus, Hauschild SpeedMixer (DAC
150 FVZ), and a corresponding procedure have been exten-
sively studied within D24 and shown to provide equivalent tint
1
This test method is under the jurisdiction of ASTM Committee D24 on Carbon
strength for all carcass or soft blacks and most tread blacks
Black and is the direct responsibility of Subcommittee D24.21 on Carbon Black
Surface Area and Related Properties.
Current edition approved Nov. 1, 2023. Published November 2023. Originally
3
approved in 1973. Last previous edition approved in 2023 as D3265 – 23. DOI: The sole source of supply of the apparatus – Hauschild SpeedMixer®, which
10.1520/D3265-23A. has been qualified for this method, including the DAC150 FVZ – known to the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or committee at this time is Hauschild, www.hauschild-speedmixer.com.
4
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM If you are aware of alternative suppliers, please provide this information to
Standards volume information, refer to the standard’s Document Summary page on A
...

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: D3265 − 23 D3265 − 23a
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
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. The test value is therefore expressed in %.
3.2 Correction Factor:
3.2.1 A correction factor in Eq 3 is needed when raw materials Paraplex G-62 and ZnO Lot#8 or earlier produced before 2012,
in combination with ITRB2, are used. For additional details refer to ASTM D3265-17a.
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 Feb. 1, 2023Nov. 1, 2023. Published February 2023November 2023. Originally approved in 1973. Last previous edition approved in 20212023
as D3265 – 21.D3265 – 23. DOI: 10.1520/D3265-23.10.1520/D3265-23A.
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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D3265 − 23a
3.2.2 There should be no correction applied when ITRB is used with Paraplex G-62 and ZnO Lot#8 or earlier.
3.2.3 There should be no correction applied when using the currently available tint raw materials (see Section 6) for pastes
prepared with either ITRB or ITRB2.
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
3,4
to prepare carbon black-zinc oxide pastes. An alternative mixing apparatus, Hauschild SpeedMixer (DAC 150 FVZ), and a
corresponding procedure have been extensively studied within D24 and shown to provi
...