ASTM D3265-13a

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 Hoover Muller apparatus which is used to prepare carbon black-zinc oxide pastes. A new mixing apparatus, SpeedMixer3 (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 Hoover 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Oct-2013
• ICS: 83.040.20 - Rubber compounding ingredients
• Technical Committee: D24 - Carbon Black
• Drafting Committee: D24.21 - Carbon Black Surface Area and Related Properties

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D3265 − 13a
StandardTest 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 strength of the tested sample is expressed as units of the
reflectance of the ITRB divided by the reflectance of the
1.1 This test method covers the determination of the tint
sample and multiplied by 100, when calibration and standard-
strength of carbon black relative to an industry tint reference
ization in Section 8 is performed with the original ITRB or
black (ITRB).
multiplied by 101.34 when ITRB2 is used in the calibration
1.2 The values stated in SI units are to be regarded as the
and standardization step.
standard. The values given in parentheses are for information
only.
4. Significance and Use
1.3 This standard does not purport to address all of the
4.1 For the broad range of commercial rubber grade carbon
safety concerns, if any, associated with its use. It is the
blacks,tintstrengthishighlydependentuponparticlesize.Tint
responsibility of the user of this standard to establish appro-
strength can be used as an indication of particle size; however,
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. tint strength is also dependent on structure and aggregate size
distribution. Therefore, differences in tint strength within
2. Referenced Documents
grades of carbon black may reflect differences other than
2
particle size.
2.1 ASTM Standards:
D1799 Practice for Carbon Black—Sampling Packaged
NOTE 1—This test method was developed primarily for the character-
Shipments
ization of N100, N200, and N300 series carbon blacks.
D1900 Practice for Carbon Black—Sampling Bulk Ship-
4.2 Tint strength values within the carbon black industry
ments
havebeendevelopedusingaHooverMullerapparatuswhichis
D4483 Practice for Evaluating Precision for Test Method
used to prepare carbon black-zinc oxide pastes. A new mixing
Standards in the Rubber and Carbon Black Manufacturing
3
apparatus, SpeedMixer (DAC 150 FVZ), and a corresponding
Industries
procedure have been extensively studied within D24 and
D4821 Guide for Carbon Black—Validation of Test Method
Precision and Bias shown to provide equivalent tint strength for all carcass or soft
blacks and most tread blacks with the exception of higher
3. Summary of Test Method
surface area N100 types and specialty blacks. Therefore, it is
the responsibility of the user of this alternate apparatus to
3.1 A carbon black sample is mixed with a white powder
ensuretheirproductswilladequatelydisperse.Disputesarising
(zinc oxide) and a liquid vehicle (soybean oil epoxide) to
produce a black or gray paste. This paste is then spread to between a user and producer should be resolved using the
Hoover Muller apparatus until ASTM develops adequate
produce a surface suitable for measuring the reflectance of the
mixture by means of a photo-electric reflectance meter. The precision statements.
reflectance of the tested sample is then compared to the
4.3 The term ITRB is used in the entire text for both, the
reflectance of the ITRB prepared in the same manner. The tint
original ITRB, used as the first reference material for tint
testing, but which is now used up, and the successor reference
1 material,ITRB2.Whereverrequired,likeincalculationswhere
This test method is under the jurisdiction ofASTM Committee D24 on Carbon
Black and is the direct responsibility of Subcommittee D24.21 on Carbon Black
it is crucial to differentiate between the original ITRB and
Surface Area and Related Properties.
ITRB2, this will be clearly mentioned in the text of the test
Current edition approved Nov. 1, 2013. Published November 2013. Originally
procedure.
approved in 1973. Last previous edition approved in 2013 as D3265 – 13. DOI:
10.1520/D3265-13A.
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
3
Standards volume information, refer to the standard’s Document Summary page on SpeedMixer is a registered trademark of FlackTek Inc., 1708 Highway 11,
the ASTM website. Bldg. G, Landrum, SC 29356. http://www.speedmixer.com
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D3265 − 13a
5,11
5. Apparatus 5.13 5 mm Glass Grinding Beads.
5.1 Analytical Balance, with a sensitivity of 60.1 mg.
6. Reagents and Materials
4,5
5.2 Automatic Muller.
6.1 Purity of Re
...

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 − 13 D3265 − 13a
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 and health practices and determine the applicability of regulatory
limitations prior to use.
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 (soybean oil epoxide) 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, when calibration and standardization in Section 8 is performed with the original
ITRB or multiplied by 101.34 when ITRB2 is used in the calibration and standardization step.
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 Hoover Muller apparatus which is used
3
to prepare carbon black-zinc oxide pastes. A new mixing apparatus, SpeedMixer (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 Hoover Muller apparatus until ASTM develops adequate precision statements.
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 Jan. 1, 2013Nov. 1, 2013. Published February 2013November 2013. Originally approved in 1973. Last previous edition approved in 20112013
as D3265 – 11.D3265 – 13. DOI: 10.1520/D3265-13.10.1520/D3265-13A.
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.
3
SpeedMixer is a registered trademark of FlackTek Inc., 1708 Highway 11, Bldg. G, Landrum, SC 29356. http://www.speedmixer.com
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D3265 − 13a
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
...