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    ASTM D4459 - 21

    Standard Practice for Xenon-Arc Exposure of Plastics Intended for Indoor Applications

    Active Standard ASTM D4459 | Developed by Subcommittee: D20.50

    Book of Standards Volume: 08.03


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    Significance and Use

    4.1 This practice is intended to simulate the effects produced by exposure to solar radiation through glass. This practice uses exposure in a xenon-arc device equipped with window glass filters and operated in accordance with Practices G151 and G155.

    Note 2: Practice D4674 describes exposures in a device that uses a combination of fluorescent “cool white” and ultraviolet (UV) lamps to simulate the effects of exposures to indoor fluorescent light and window glass filtered daylight.

    4.2 Warning—Variation in results may be expected when operating conditions are varied within the accepted limits of this practice. Therefore, all references to the use of this practice must be accompanied by a report prepared in accordance with Section 9 that describes the specific operating conditions used. Refer to Practice G151 for detailed information on the caveats applicable to use of results obtained in accordance with this practice.

    Note 3: Additional information on sources of variability and on strategies for addressing variability in the design, execution and data analysis of laboratory accelerated exposure tests is found in Guide G141.

    4.3 Test results will depend upon the care that is taken to operate the equipment in accordance with Practice G155. Significant factors include regulation of line voltage, temperature and humidity control, and condition and age of the lamps and filters.

    4.4 Reproducibility of test results between laboratories has been shown to be good when the stability of materials is evaluated in terms of performance ranking compared to other materials or to a control.4,5 Therefore, exposure of a similar material of known performance (a control) at the same time as the test materials is strongly recommended. The number of specimens of the control material should be the same as that used for test materials. It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results.

    1. Scope

    1.1 This practice covers specific procedures and test conditions that are applicable for exposure of plastics in window glass-filtered xenon-arc devices in accordance with Practices G151 and G155 for evaluating the stability of plastics intended for use in indoor applications.

    1.2 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.

    Note 1: There is no known ISO equivalent to this practice.

    1.3 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

    D1729 Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque Materials

    D2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates

    D3980 Practice for Interlaboratory Testing of Paint and Related Materials

    D4674 Practice for Accelerated Testing for Color Stability of Plastics Exposed to Indoor Office Environments

    D5870 Practice for Calculating Property Retention Index of Plastics

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

    G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials

    G141 Guide for Addressing Variability in Exposure Testing of Nonmetallic Materials

    G147 Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests

    G151 Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources

    G155 Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials

    G169 Guide for Application of Basic Statistical Methods to Weathering Tests


    ICS Code

    ICS Number Code 83.080.01 (Plastics in general)

    UNSPSC Code

    UNSPSC Code 13100000(Rubber and elastomers)


    Referencing This Standard
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    DOI: 10.1520/D4459-21

    Citation Format

    ASTM D4459-21, Standard Practice for Xenon-Arc Exposure of Plastics Intended for Indoor Applications, ASTM International, West Conshohocken, PA, 2021, www.astm.org

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