ASTM D6279 - 20

    Standard Test Method for Rub Abrasion Mar Resistance of High Gloss Coatings

    Active Standard ASTM D6279 | Developed by Subcommittee: D01.55

    Book of Standards Volume: 06.02


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    Significance and Use

    5.1 Coatings, particularly the high gloss coatings used on automobiles, boats, toys, etc., are subject to a wide variety of conditions (for example, wiping, cleaning and exposure) during manufacture and service that can mar their surface. The ability of high gloss coatings to maintain their appearance is an important product attribute. This test method provides a way to estimate the ability of high gloss coatings to resist mar damage.

    1. Scope

    1.1 This test method covers procedures for evaluating the relative mar resistance of a high gloss coating applied to a flat, rigid surface. Wet rub and dry rub abrasion tests are described. To fully characterize a coating's mar resistance, both tests should be run.

    Note 1: Dry abrasion mar resistance can also be evaluated by using Test Methods D6037. If a very highly mar resistant coating is being evaluated, Test Methods D6037 will generally provide the better performance discrimination than the dry rub test described here. However, if the equipment described in Test Methods D6037 is not available, the dry rub test described in this test method affords a reasonable alternative. The dry rub test is also useful for evaluating coatings that are not highly mar resistant.

    1.2 Mar resistance is assessed by measuring the gloss of the abraded and unabraded areas. Mar resistance is directly related to the coating’s ability to retain gloss in abraded areas.

    Note 2: The mar resistance values obtained by this test method have no absolute significance. They should only be used to derive relative performance rankings for test panels that have been prepared from the series of coatings that are currently being evaluated. If mar resistance values are quoted between laboratories, it is essential that a common standard be measured and that the values be compared to that standard. Even then, the values should be used with caution.

    1.3 The values stated in SI units are to be regarded as 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.


    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

    D16 Terminology for Paint, Related Coatings, Materials, and Applications

    D523 Test Method for Specular Gloss

    D823 Practices for Producing Films of Uniform Thickness of Paint, Coatings and Related Products on Test Panels

    D1005 Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers

    D3924 Specification for Standard Environment for Conditioning and Testing Paint, Varnish, Lacquer, and Related Materials

    D4449 Test Method for Visual Evaluation of Gloss Differences Between Surfaces of Similar Appearance

    D6037 Test Methods for Dry Abrasion Mar Resistance of High Gloss Coatings

    D7091 Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals


    ICS Code

    ICS Number Code 25.220.99 (Other treatments and coatings)

    UNSPSC Code

    UNSPSC Code 31211504(Coating paints)


    Referencing This Standard
    Link Here
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    DOI: 10.1520/D6279-20

    Citation Format

    ASTM D6279-20, Standard Test Method for Rub Abrasion Mar Resistance of High Gloss Coatings, ASTM International, West Conshohocken, PA, 2020, www.astm.org

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