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Significance and Use
4.1 Evaluation of sag resistance is essential in quality control for both producers and purchasers of coatings. Practical application tests are poor in reproducibility, while viscometric methods, for example Test Methods , are time-consuming and lack the convincing aspect of actual sagging. This method provides simple and rapid tests, whereby sag resistance is demonstrated by a visible sag pattern, and is rated objectively in terms of numerical values that correlate with brushout test observations.
1.1 This test method covers the laboratory determination of the sag resistance of aqueous and nonaqueous liquid coatings at any level of sag resistance.
FIG. 1 Diagram of the Medium Range Anti-Sag Meter
FIG. 2 Medium Range Anti-Sag Meter
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
Note 1: Because the only manufacturer of the applicator know to the committee manufactures to inch-pound units, inch-pound units will be regarded as the standard when referring to the applicator.
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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
U.S. Federal SpecificationsFed. Spec. TT-E-506 Fed. Spec. TT-E-508 Alkyd semi-gloss enamel
D2196 Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational Viscometer
ICS Number Code 87.040 (Paints and varnishes)
UNSPSC Code 31211500(Paints and primers)
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ASTM D4400-18, Standard Test Method for Sag Resistance of Paints Using a Multinotch Applicator, ASTM International, West Conshohocken, PA, 2018, www.astm.orgBack to Top