Standard Test Method for Carbon Black—Tint Strength

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.

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Publication Date
30-Nov-2005
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ASTM D3265-05 - 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D3265–05
Standard Test Method for
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Carbon Black—Tint Strength
This standard is issued under the fixed designation D 3265; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope reflectance of the ITRB divided by the reflectance of the
sample and multiplied by 100.
1.1 This test method covers the determination of the tint
strength of carbon black relative to an industry tint reference
4. Significance and Use
black (ITRB).
4.1 For the broad range of commercial rubber grade carbon
1.2 The values stated in SI units are to be regarded as the
blacks,tintstrengthishighlydependentuponparticlesize.Tint
standard. The values given in parentheses are for information
strength can be used as an indication of particle size; however,
only.
tint strength is also dependent on structure and aggregate size
1.3 This standard does not purport to address all of the
distribution. Therefore, differences in tint strength within
safety concerns, if any, associated with its use. It is the
grades of carbon black may reflect differences other than
responsibility of the user of this standard to establish appro-
particle size.
priate safety and health practices and determine the applica-
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
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5. Apparatus
2.1 ASTM Standards:
5.1 Analytical Balance, with a sensitivity of 60.1 mg.
D 1799 Practice for Carbon Black—Sampling Packaged
,
3 4
Shipments 5.2 Automatic Muller.
5.3 Photometric Instrument, capable of detecting differ-
D 1900 Practice for Carbon Black—Sampling Bulk Ship-
ments ences in the amount of light reflectance between shades of
4,5
gray. The instrument is to be operated following the manu-
D 4483 Practice for Evaluating Precision for Test Method
Standards in the Rubber and Carbon Black Manufacturing facturer’s instructions for optimum performance.
Industries 5.4 Oven, Gravity-Convection Type, capable of temperature
regulation within 61°C at 125°C (62°F at 257°F) and
D 4821 Guide for Carbon Black—Validation of Test
Method Precision and Bias temperature uniformity within 65°C (69°F).
5.5 Reflectance Standards, as required for each reflectance
3. Summary of Test Method
instrument for checking calibration.
3.1 A carbon black sample is mixed with a white powder 5.6 Spatulas, 100 to 150 mm (4 to 6 in.), two, flexible,
(zinc oxide) and a liquid vehicle (soybean oil epoxide) to tapered.
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produce a black or gray paste. This paste is then spread to 5.7 Syringe, 5-cm , automatic refilling, reproducible to
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produce a surface suitable for measuring the reflectance of the 60.02 cm .
mixture by means of a photo-electric reflectance meter. The 5.8 Wiping Tissue, absorbent and lint free.
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
3
The sole source of supply of the HooverAutomatic Muller, Model M5, known
to the committee at this time is Hoover Color Corp., P.O. Box 218, State Highway
693, Hiwassee, VA 24347.
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This test method is under the jurisdiction ofASTM Committee D24 on Carbon If you are aware of alternative suppliers, please provide this information to
Black and is the direct responsibility of Subcommittee D24.21 on Carbon Black ASTM International Headquarters. Your comments will receive careful consider-
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Surface Area and Related Properties. ation at a meeting of the responsible technical committee, which you may attend.
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Current edition approved Dec. 1, 2005. Published January 2006. Originally The following instruments have been found satisfactory for this test method:
approved in 1973. Last previous edition approved in 2003 as D 3265 – 03. Erichsen Tint Tester 527, available from T. G. Bell, Inc., 1340 Home Ave., Akron,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or OH 44310, and Hunter MiniScan XE or XE Plus, available from HunterAssociates
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Laboratory, Inc., 11491 Sunset Hills Road, Reston, Virginia 22090-5280. The
Standards volume information, refer to the standard’s Document Summary page on Densicron reflectometer, though no longer commercially available, may be used for
the ASTM website. the test. For instructions, see Test Method D 3265 – 01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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