ASTM D1210-05(2022)
(Test Method)Standard Test Method for Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type Gage
Standard Test Method for Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type Gage
SIGNIFICANCE AND USE
4.1 In making pigmented products, the pigment is usually dispersed in a portion of the vehicle in some sort of mill. At this stage, it is necessary to be able to judge if the pigment agglomerates have been sufficiently broken up so as not to interfere with the smoothness of the finished coating film. This test method describes a way of making this judgment.
SCOPE
1.1 This test method covers measurement of the degree of dispersion (commonly referred to as “fineness of grind”) of the pigment in a pigment-vehicle system such as liquid coatings and their intermediates. It may also be used to assess the inclusion of particulates by a cleanliness (or texture) rating.
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
Relations
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: D1210 − 05 (Reapproved 2022)
Standard Test Method for
Fineness of Dispersion of Pigment-Vehicle Systems by
1
Hegman-Type Gage
This standard is issued under the fixed designation D1210; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope where the particles form a definite pattern. When the single
path gage is used it is also possible to rate “cleanliness” (see
1.1 This test method covers measurement of the degree of
6.2).
dispersion (commonly referred to as “fineness of grind”) of the
pigment in a pigment-vehicle system such as liquid coatings
3.2 Stepped Gage—The product is spread by means of a
and their intermediates. It may also be used to assess the scraper on a stepped gage. There are 2 delimited sections on
2 2
inclusion of particulates by a cleanliness (or texture) rating.
this gage, each of 6.5 cm (1 in. ) area, and of two different
depths. A count is made of the particles deposited in the two
1.2 The values stated in SI units are to be regarded as the
delimited areas, and cleanliness (texture) reading is deter-
standard. The values given in parentheses are for information
mined.
only.
1.3 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 In making pigmented products, the pigment is usually
responsibility of the user of this standard to establish appro-
dispersedinaportionofthevehicleinsomesortofmill.Atthis
priate safety, health, and environmental practices and deter-
stage, it is necessary to be able to judge if the pigment
mine the applicability of regulatory limitations prior to use.
agglomerates have been sufficiently broken up so as not to
1.4 This international standard was developed in accor-
interfere with the smoothness of the finished coating film. This
dance with internationally recognized principles on standard-
test method describes a way of making this judgment.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
5. Apparatus
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
5.1 Tapered Gage—A hardened steel, stainless steel, or
chrome-plated steel block (Fig. 1) approximately 170 mm (6.7
2. Referenced Documents
in.) in length, and 15 mm (0.6 in.) in thickness.The top surface
2
2.1 ASTM Standards:
of the block shall be ground smooth and planar and shall
D1316 Test Method for Fineness of Grind of Printing Inks
contain one or two paths 127 mm (5 in.) in calibrated length.
By the NPIRI Grindometer
The path shall be tapered uniformly in depth lengthwise from
about 4 mils (100 µm) at 10 mm from one end to zero depth at
3. Summary of Test Method
the other with intermediate calibrations in accordance with the
3.1 Tapered Gage—The product is spread by means of a
depth at those points. Preferred calibrations are Hegman units
scraper in a machined tapered path.At some point in this path,
and micrometers (Note 1). Three path widths are covered by
particlesoragglomerates,orboth,willbecomevisible.Adirect
this test method:
reading from the graduated scale is then made at the point
5.1.1 Two Parallel Paths, each 12.5-mm (0.5-in.) wide and
spaced 0.5-in. apart centered in a block 65-mm (2.5-in.) wide
1 (see Fig. 1).
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
5.1.2 One Path, 50 mm (2 in.) in width centered in a block
Subcommittee D01.24 on Physical Properties of Liquid Paints & Paint Materials.
90-mm (3.5-in.) wide (see Fig. 1).
Current edition approved July 1, 2022. Published July 2022. Originally approved
5.1.3 One Path, 25 mm (1 in.) in width centered in a block
in 1952. Last previous edition approved in 2014 as D1210 – 05 (2014). DOI:
10.1520/D1210-05R22. 65-mm (2.5-in.) wide (see Fig. 1a).
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
NOTE1—Severalarbitraryscalesandmodificationsofthegageareused
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on by industry. In order that readings obtained with these arbitrary scales and
the ASTM website. modifications can be reported in the preferred units, the appro
...
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