ASTM D2067-97(2020)
(Test Method)Standard Test Method for Coarse Particles in Printing Ink Dispersions
Standard Test Method for Coarse Particles in Printing Ink Dispersions
SIGNIFICANCE AND USE
4.1 Coarse particles in printing inks reduce the efficiency of the dispersion process, requiring not only extra milling passes, but also frequent changes in pump filters. In printing processes, they may cause excessive wear to metal plates, piling or localized retention of ink on blankets and plates, and water balance problems. Coarse particles also reduce color strength and the gloss of printed matter.
4.2 This test method is suitable for quality control. The precision may be improved by the use of a specimen size larger than that prescribed.
4.3 Test results are sensitive to the type of washout solvent used. Strong solvents are to be avoided because they may dissolve large particles of resin in the ink vehicle.
SCOPE
1.1 This test method covers the determination of the weight concentration of coarse particles in printing ink dispersions by sieve retention.
1.2 This test method is applicable to printing inks, flushed pigments, and other pigment dispersions that contain particles larger than 45 μm. With proper choice of solvent, it is applicable both to paste and liquid inks.
Note 1: This test method is similar in principle to Test Methods D185. For particles under 25 μm, see Test Method D1316.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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.
1.5 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: D2067 − 97 (Reapproved 2020)
Standard Test Method for
Coarse Particles in Printing Ink Dispersions
This standard is issued under the fixed designation D2067; 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 E11 Specification for Woven Wire Test Sieve Cloth and Test
Sieves
1.1 This test method covers the determination of the weight
E145 Specification for Gravity-Convection and Forced-
concentration of coarse particles in printing ink dispersions by
Ventilation Ovens
sieve retention.
E691 Practice for Conducting an Interlaboratory Study to
1.2 This test method is applicable to printing inks, flushed
Determine the Precision of a Test Method
pigments, and other pigment dispersions that contain particles
larger than 45 µm. With proper choice of solvent, it is
3. Summary of Test Method
applicable both to paste and liquid inks.
3.1 A 50-g specimen of the test dispersion is diluted, if
NOTE 1—This test method is similar in principle toTest Methods D185.
necessary, with a reducing varnish, mixed with 200 g of
For particles under 25 µm, see Test Method D1316.
mineral spirits or other mutually agreeable solvent, mixed in a
1.3 The values stated in SI units are to be regarded as the paint shaker for 30 min, and passed through a tared 325-mesh
standard. The values given in parentheses are for information
wire cloth sieve. The sieve is dried in an oven and reweighed.
only. The residue is reported either as a percentage or in parts per
million of the specimen.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.2 The nature of the coarse particles may be identified
responsibility of the user of this standard to establish appro-
through the use of a magnet and visual or microscopic
priate safety, health, and environmental practices and deter-
examination.
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor- 4. Significance and Use
dance with internationally recognized principles on standard-
4.1 Coarse particles in printing inks reduce the efficiency of
ization established in the Decision on Principles for the
the dispersion process, requiring not only extra milling passes,
Development of International Standards, Guides and Recom-
butalsofrequentchangesinpumpfilters.Inprintingprocesses,
mendations issued by the World Trade Organization Technical
they may cause excessive wear to metal plates, piling or
Barriers to Trade (TBT) Committee.
localized retention of ink on blankets and plates, and water
balance problems. Coarse particles also reduce color strength
2. Referenced Documents
and the gloss of printed matter.
2.1 ASTM Standards:
4.2 This test method is suitable for quality control. The
D185 Test Methods for Coarse Particles in Pigments
precisionmaybeimprovedbytheuseofaspecimensizelarger
D235 Specification for Mineral Spirits (Petroleum Spirits)
than that prescribed.
(Hydrocarbon Dry Cleaning Solvent)
4.3 Test results are sensitive to the type of washout solvent
D1316 Test Method for Fineness of Grind of Printing Inks
used. Strong solvents are to be avoided because they may
By the NPIRI Grindometer
dissolve large particles of resin in the ink vehicle.
5. Apparatus
This test method is under the jurisdiction of ASTM Committee D01 on Paint
5.1 Wire-Cloth Sieve, preferably disposable, 325 mesh (45
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.56 on Printing Inks. µm), 60.3 mm in diameter; alternatively, a 75-mm No. 325
Current edition approved June 1, 2020. Published June 2020. Originally
sieve conforming to Specification E11.
approved in 1992. Last previous edition approved in 2013 as D2067 – 97 (2013).
DOI: 10.1520/D2067-97R20.
NOTE2—Adisposablesieveispreferredforprecisionbecauseitweighs
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
only 0.5 g compared to about 70 g for a conventional sieve.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.2 Washout Cup Assembly (for use with the disposable
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. sieve), assembled according to the manufacturer’s instructions.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D2067 − 97 (2020)
5.3 Balance, sensitive to 1.0 mg, preferably 0.1 mg. 8.4 Place a plastic sheet over the mouth of the jar and
tighten the lid. If made of glass, set the jar into a metal
5.4 Paint Shaker.
container lined with foam or other soft material before locking
5.5 Oven, gravity-convection type conforming to Type 1B
between the jaws of the shaker.
in Specification E145 and maintained at 110° 6 5°C.
8.5 Turn the shaker on and let run for 30 min.
5.6 Mixing Container, such as a widemouth bottle or jar,
8.6 When the shaker stops, remove the jar, unscrew the lid
with screw cap, capacity 473 mL(1 pt), preferably plastic. If a
and carefully remove the plastic sheet. Using a wash bottle
glass jar is used, a metal container such as a 1-lb coffee can
containing the same solvent as in 8.3, wash down the plastic
with lid and foam packing are recommended for protecting the
sheet into the jar containing the dissolved specimen.
jar while on the shaker.
8.7 Tare a clean dry sieve to 1 mg, preferably 0.1 mg, and,
5.7 Spatula, suitable for mixing 100 g of material.
if disposable, set in place on the washout cup assembly. Pour
6. Reagents and Materials
the contents of the jar quickly through the sieve. Invert the jar
over the screen and rinse out with solvent from the wash bottle
6.1 Washout Solvent, as mutually agreed upon between the
until no color remains in the jar. Make sure that no residue
producer and the user. Type I mineral spirits conforming to
remains in the jar and that all solvent from the jar passes over
Specification D235 has been found useful for oleoresinous
the screen.
systems. The solvent should be filtered through a 325-mesh
screen prior to use.
8.8 Was
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