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Standard Test Method for Fineness of Grind of Printing Inks By the NPIRI Grindometer
NORMA vydaná dňa 1.6.2020
Označenie normy: ASTM D1316-20
Dátum vydania normy: 1.6.2020
Kód tovaru: NS-995297
Počet strán: 6
Približná hmotnosť: 18 g (0.04 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
A1 Scraper, Automatic Drawdown Machine (ADM-1), degree of dispersion, grind gauge, NPIRI Grindometer, pigment dispersions, printing inks,
Significance and Use | ||||||||||||
5.1 Oversize particles in a printing ink may damage a printing plate, plug a cell, clog a nozzle and adversely affect the appearance of printed ink films. Fineness of grind measurements are useful for deciding when to stop the dispersion process and for determining if the test material meets specifications as agreed upon between the supplier and the customer. |
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1. Scope | ||||||||||||
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 μm 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 μm gauge specified in this test method is
similar in principle to the 0 to 100 μm Hegman gauge described in
Test Method D1210 and the
various gauges described in ISO 1524:2000. Sieve analysis for
concentration of particles above 45 μm 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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2. Referenced Documents | ||||||||||||
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