ASTM D3265-07

Standard Test Method for Carbon Black-Tint Strength

SIGNIFICANCE AND USE
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.
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.
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.
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: 30-Jun-2007
• 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 D3265-06 - Standard Test Method for Carbon Black-Tint Strength
• Effective Date: 01-Jul-2007
• Referred By: ASTM D7849-23 - Standard Classification for Nomenclature of Reference Materials of Committee D24
• Effective Date: 01-Jul-2007
• Referred By: ASTM D5817-20 - Standard Practice for Carbon Black, Pelleted—Reduction, Blending, and Drying of Gross Samples for Testing
• Effective Date: 01-Jul-2007
• Referred By: ASTM D4821-20 - Standard Guide for Carbon Black—Validation of Test Method Precision and Bias
• Effective Date: 01-Jul-2007
• Referred By: ASTM D3053-23 - Standard Terminology Relating to Carbon Black
• Effective Date: 01-Jul-2007
• Referred By: ASTM D4122-17(2023) - Standard Practice for Carbon Black—Evaluation of an Industry Reference Black
• Effective Date: 01-Jul-2007
• Referred By: ASTM D6915-23 - Standard Practice for Carbon Black—Evaluation of Standard Reference Blacks
• Effective Date: 01-Jul-2007
• Referred By: ASTM D1765-23a - Standard Classification System for Carbon Blacks Used in Rubber Products
• Effective Date: 01-Jul-2007

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:D3265–07
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 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
safety concerns, if any, associated with its use. It is the
4. Significance and Use
responsibility of the user of this standard to establish appro-
4.1 For the broad range of commercial rubber grade carbon
priate safety and health practices and determine the applica-
blacks,tintstrengthishighlydependentuponparticlesize.Tint
bility of regulatory limitations prior to use.
strength can be used as an indication of particle size; however,
2. Referenced Documents tint strength is also dependent on structure and aggregate size
2
distribution. Therefore, differences in tint strength within
2.1 ASTM Standards:
grades of carbon black may reflect differences other than
D1799 Practice for Carbon Black—Sampling Packaged
particle size.
Shipments
D1900 Practice for Carbon Black—Sampling Bulk Ship-
NOTE 1—This test method was developed primarily for the character-
ments
ization of N100, N200, and N300 series carbon blacks.
D4483 Practice for Evaluating Precision for Test Method
4.2 Tint strength values within the carbon black industry
Standards in the Rubber and Carbon Black Manufacturing
havebeendevelopedusingaHooverMullerapparatuswhichis
Industries
used to prepare carbon black-zinc oxide pastes. A new mixing
D4821 GuideforCarbonBlack—ValidationofTestMethod 3
apparatus, SpeedMixer (DAC 150 FVZ), and a corresponding
Precision and Bias
procedure have been extensively studied within D24 and
shown to provide equivalent tint strength for all carcass or soft
3. Summary of Test Method
blacks and most tread blacks with the exception of higher
3.1 A carbon black sample is mixed with a white powder
surface area N100 types and specialty blacks. Therefore, it is
(zinc oxide) and a liquid vehicle (soybean oil epoxide) to
the responsibility of the user of this alternate apparatus to
ensuretheirproductswilladequatelydisperse.Disputesarising
1
between a user and producer should be resolved using the
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
Hoover Muller apparatus until ASTM develops adequate
Surface Area and Related Properties.
precision statements.
Current edition approved July 1, 2007. Published July 2007. Originally approved
in 1973. Last previous edition approved in 2006 as D3265 – 06. DOI: 10.1520/
D3265-07.
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.
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D3265–07
5. Apparatus on Analytical Reagents of the American Chemical Society,
12
where such specifications are available. Other grades may be
5.1 Analytical Balance, with a sensitivity of 60.1 mg.
,
4 5 used, provided it is first ascertained that the reagent is of
5.2 Automatic Muller.
sufficiently high purity to permit its use without lessening the
5.3 Photometric Instrument, capable of detecting differ-
accuracy of the determination.
ences in the amount of light reflectance between shades of
,
5 13
,
5 6
6.2 Industry Tint Reference Black.
gray. The instrument is to be operated following the manu-
5,14,15
6.3 Plasticizer, soybean oil epoxide.
facturer’s instructions for optimum performance.
6.4 Denatured Alcohol, for cleaning purposes.
...