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ASTM D3265-11

(Test Method)

Standard Test Method for Carbon Black-Tint Strength

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, 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.
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
30-Apr-2011
ICS
83.040.20 - Rubber compounding ingredients
Technical Committee
D24 - Carbon Black
Drafting Committee
D24.21 - Carbon Black Surface Area and Related Properties
Current Stage
Ref Project

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ASTM D3265-11 - Standard Test Method for Carbon Black-Tint StrengthASTM D3265-11 - Standard Test Method for Carbon Black-Tint Strength
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ASTM D3265-11 - Standard Test Method for Carbon Black-Tint Strength
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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 − 11
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.
strength of carbon black relative to an industry tint reference
black (ITRB).
4. Significance and Use
1.2 The values stated in SI units are to be regarded as the
4.1 For the broad range of commercial rubber grade carbon
standard. The values given in parentheses are for information
blacks,tintstrengthishighlydependentuponparticlesize.Tint
only.
strength can be used as an indication of particle size; however,
1.3 This standard does not purport to address all of the
tint strength is also dependent on structure and aggregate size
safety concerns, if any, associated with its use. It is the
distribution. Therefore, differences in tint strength within
responsibility of the user of this standard to establish appro-
grades of carbon black may reflect differences other than
priate safety and health practices and determine the applica-
particle size.
bility of regulatory limitations prior to use.
NOTE 1—This test method was developed primarily for the character-
ization of N100, N200, and N300 series carbon blacks.
2. Referenced Documents
2
2.1 ASTM Standards: 4.2 Tint strength values within the carbon black industry
havebeendevelopedusingaHooverMullerapparatuswhichis
D1799 Practice for Carbon Black—Sampling Packaged
Shipments used to prepare carbon black-zinc oxide pastes.Anew mixing
3
apparatus, SpeedMixer (DAC 150 FVZ), and a corresponding
D1900 Practice for Carbon Black—Sampling Bulk Ship-
ments procedure have been extensively studied within D24 and
shown to provide equivalent tint strength for all carcass or soft
D4483 Practice for Evaluating Precision for Test Method
Standards in the Rubber and Carbon Black Manufacturing blacks and most tread blacks with the exception of higher
Industries surface area N100 types and specialty blacks. Therefore, it is
D4821 Guide for Carbon Black—Validation of Test Method the responsibility of the user of this alternate apparatus to
Precision and Bias ensuretheirproductswilladequatelydisperse.Disputesarising
between a user and producer should be resolved using the
3. Summary of Test Method
Hoover Muller apparatus until ASTM develops adequate
precision statements.
3.1 A carbon black sample is mixed with a white powder
(zinc oxide) and a liquid vehicle (soybean oil epoxide) to
5. Apparatus
produce a black or gray paste. This paste is then spread to
produce a surface suitable for measuring the reflectance of the
5.1 Analytical Balance, with a sensitivity of 60.1 mg.
mixture by means of a photo-electric reflectance meter. The
4,5
5.2 Automatic Muller.
reflectance of the tested sample is then compared to the
reflectance of the ITRB prepared in the same manner. The tint
5.3 Photometric Instrument, capable of detecting differ-
ences in the amount of light reflectance between shades of
1
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
3
Surface Area and Related Properties. SpeedMixer is a registered trademark of FlackTek Inc., 1708 Highway 11,
Current edition approved May 1, 2011. Published June 2011. Originally Bldg. G, Landrum, SC 29356. http://www.speedmixer.com
4
approved in 1973. Last previous edition approved in 2007 as D3265 – 07. DOI: The sole source of supply of the HooverAutomatic Muller, Model M5, known
10.1520/D3265-11. to the committee at this time is Hoover Color Corp., P.O. Box 218, State Highway
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 693, Hiwassee, VA 24347.
5
contact ASTM Customer Service at service@astm.org. 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 ASTM International Headquarters. Your comments will receive careful consider-
1
the ASTM website. ation at a meeting of the responsible technical committee, which you may attend.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D3265 − 11
5,6 12
gray. The instrument is to be operated following the manu- where such specifications are avail
...

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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.
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