ASTM E430 - 11

    Standard Test Methods for Measurement of Gloss of High-Gloss Surfaces by Abridged Goniophotometry

    Active Standard ASTM E430 | Developed by Subcommittee: E12.03

    Book of Standards Volume: 06.01


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    Significance and Use

    The gloss of metallic finishes is important commercially on metals for automotive, architectural, and other uses where these metals undergo special finishing processes to produce the appearances desired. It is important for the end-products, which use such finished metals that parts placed together have the same glossy appearance.

    It is also important that automotive finishes and other high-gloss nonmetallic surfaces possess the desired finished appearance. The present method identifies by measurements important aspects of finishes. Those having identical sets of numbers normally have the same gloss characteristics. It usually requires more than one measurement to identify properly the glossy appearance of any finish (see Refs 3 and 4).

    1. Scope

    1.1 These test methods cover the measurement of the reflection characteristics responsible for the glossy appearance of high-gloss surfaces. Three test methods, A, B and C, are provided for evaluating such surface characteristics at specular angles of 30°, 20° and 30°, respectively. These test methods are not suitable for diffuse finish surfaces nor do they measure color, another appearance attribute.

    1.2 As originally developed by Tingle and others (see Refs 1 and 2), the test methods were applied only to bright metals. Recently they have been applied to high-gloss automotive finishes and other nonmetallic surfaces.

    1.3 The DOI of a glossy surface is generally independent of its curvature. The DOI measurement by this test method is limited to flat or flattenable surfaces.


    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

    D523 Test Method for Specular Gloss

    D2457 Test Method for Specular Gloss of Plastic Films and Solid Plastics

    E171 Practice for Conditioning and Testing Flexible Barrier Packaging

    E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

    E179 Guide for Selection of Geometric Conditions for Measurement of Reflection and Transmission Properties of Materials

    E284 Terminology of Appearance

    E308 Practice for Computing the Colors of Objects by Using the CIE System

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

    E1347 Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry


    ICS Code

    ICS Number Code 17.040.20 (Properties of surfaces)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/E0430-11

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