Significance and Use

By following this practice it is possible to make reproducible flushes when using the same raw materials. Therefore, if someone wishes to evaluate the effect a different raw material has on a flush, it is possible to evaluate this effect by noting the change that occurs from a control flush to the experimental flush. This change can be, but is not limited to; such things as strength after vacuum, grind, grit, gloss etc. This practice can be used by ink companies, pigment companies or varnish companies. This practice is not meant to give absolute values but is meant to be used as a relative practice in which a control flush is made using a standard formula and the experimental flush is compared to the control flush. This practice is not meant to determine the absolute performance of a formula in production. Again it can be used to give a relative idea of how a formula will perform in production when a correlation has been established between laboratory flushing and production flushing.

1. Scope

1.1 This practice covers guidelines for the evaluations of flushing vehicles for pigment dispersion using a vacuum modified sigma blade mixer, or vacuum flusher.

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.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D280 Test Methods for Hygroscopic Moisture (and Other Matter Volatile Under the Test Conditions) in Pigments

D387 Test Method for Color and Strength of Chromatic Pigments with a Mechanical Muller

D1316 Test Method for Fineness of Grind of Printing Inks By the NPIRI Grindometer

D2066 Test Methods for Relative Tinting Strength of Paste-Type Printing Ink Dispersions

D2067 Test Method for Coarse Particles in Printing Ink Dispersions

D4017 Test Method for Water in Paints and Paint Materials by Karl Fischer Method

D4040 Test Method for Rheological Properties of Paste Printing and Vehicles by the Falling-Rod Viscometer

D4361 Test Method for Apparent Tack of Printing Inks and Vehicles by a Three-Roller Tackmeter

Keywords

dispersion; flush; flusher; flushing; pigment; presscake; sigma blade; vehicle; Pigment dispersion (paints/related coatings/materials); Presscake; Sigma blade; Vacuum flusher; Vehicle separation (paints/related coatings); Flusher;

ICS Code

ICS Number Code 43.160 (Special purpose vehicles)

DOI: 10.1520/D6336-11

ASTM International is a member of CrossRef.

ASTM D6336