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Ink

ASTM publishes these standards on ink particle testing. These include the standard test methods for coarse particles in printing ink and fineness of grind in printing ink.

ASTM D2067-97(2020)

Standard Test Method for Coarse Particles in Printing Ink Dispersions

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 m. 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 m, 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.

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ASTM D1316-20

Standard Test Method for Fineness of Grind of Printing Inks By the NPIRI Grindometer

1.1 This test method describes the procedure for determining the fineness of grind of printing inks using a NPIRI Grindometer. It evaluates the size of the largest particles in a finished dispersion but not average particle size or concentration of sizes. 1.2 This test method covers both manual and automatic drawdowns using an A1 scraper. 1.3 This test method is applicable to any dispersion that is fine enough to fall within the 0 to 25 m range of the specified grind gauge. With a minor variation in procedure, it is applicable to both paste (nonvolatile) and liquid (volatile) inks. Note 1: The 0 to 25 m gauge specified in this test method is similar in principle to the 0 to 100 m Hegman gauge described in Test Method D1210 and the various gauges described in ISO 1524:2000. Sieve analysis for concentration of particles above 45 m is covered in Test Method D2067 . 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.

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