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Description of ASTM-D4674 2010ASTM D4674 - 02a(2010)Standard Practice for Accelerated Testing for Color Stability of Plastics Exposed to Indoor Office EnvironmentsActive Standard ASTM D4674 | Developed by Subcommittee: D20.50 Book of Standards Volume: 08.02 ASTM D4674Significance and Use Tests conducted in accordance with this practice are intended to induce property changes associated with use exposure to light and heat in typical office environments. These exposures are not intended to simulate the deterioration caused by localized phenomena such as handling, dirt contamination, etc. Note 5 Caution: Caution: Refer to practice G151 for full cautionary guidance applicable to all laboratory weathering devices. Additional information on sources of variability and on strategies for addressing variability by design and data analysis of laboratory accelerated exposure tests is found in Guide G141 . Variation in results may be expected are possible between the different methods described in this practice. For example, differences in spectral distribution of the lamps used and variations in the irradiance for a single type of lamp can cause significant differences in test results. Therefore, any no reference to the use of this practice should be made unless accompanied by a report prepared in accordance with Section 12 that describes needs to include a reference to the method used. 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. Therefore, exposure of a similar material of known performance (a control) at the same time as the test materials is strongly recommended. 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 the basic principles and operating procedures for using fluorescent light to determine color stability of plastics when materials are exposed in typical office environments where fluorescent overhead lighting and window-filtered daylight are used for illumination and where temperature and humidity conditions are in accordance with American Society of Heating, Refrigerating, and Air-conditioning Engineers (ASHRAE) recommendations for workers' comfort. 1.2 This practice describes four methods where specimens are exposed to fluorescent light under controlled environmental conditions. Two of the methods use an exposure device that provides for mixing of fluorescent lamps and two of the methods use devices that comply with Practice G154 . Note 1Method I uses cool white fluorescent lamps and window glass filtered fluorescent UVB lamps and is the same method described in previous versions of this standard. 1.3 Specimen preparation and evaluation of the results are covered in ASTM methods or specifications for specific materials. General guidance is given in Practice G151 . More specific information about methods for determining the change in properties after exposure and reporting these results is described in Practice D5870 . 1.4 The values stated in SI units are to be regarded as the standard. 1.5 Unless otherwise specified, all dimensions are nominal. 1.6 This practice may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns, is 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. Specific precautionary statements are given in Section 7. Note 2There is no known ISO equivalent to this 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 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 G154 Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials G169 Guide for Application of Basic Statistical Methods to Weathering Tests Keywords color change; color; plastics; office environment; fluorescent light; ICS Code ICS Number Code 83.080.01 (Plastics in general) DOI: 10.1520/D4674-02AR10 ASTM International is a member of CrossRef. ASTM D4674This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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