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Description of ASTM-D4303 2016ASTM D4303-10-Reapproved2016Historical Standard: Standard Test Methods for Lightfastness of Colorants Used in Artists' MaterialsASTM D4303Scope 1.1 Four test methods to accelerate the effects of long term indoor illumination on artists’ materials are described below. One of the natural daylight methods and one of the xenon-arc methods are used to categorize the lightfastness of colorants. 1.1.1 Test Method A—Exposure in southern Florida to natural daylight filtered through window glass. 1.1.2 Test Method B—Exposure in Arizona to natural daylight filtered through window glass. 1.1.3 Test Method C—Exposure in a non-humidity controlled xenon-arc device simulating daylight filtered through window glass. 1.1.4 Test Method D—Exposure in a humidity controlled xenon-arc device simulating daylight filtered through window glass. 1.2 These test methods are used to approximate the color change that can be expected over time in colorants used in artists' materials exposed indoors to daylight through window glass. Note 1: The color changes that result from accelerated exposure may not duplicate the results of normal indoor exposure in a home, art gallery, or museum. The relative resistance to change, however, can be established so colored materials can be assigned to categories of relative lightfastness. Note 2: Users who wish to test colored materials under fluorescent illumination should consult Practice D4674. 1.3 Lightfastness categories are established to which colorants are assigned based on the color difference between specimens before and after exposure. 1.4 Color difference units are calculated by the CIE 1976 L*a*b* color difference equation. 1.5 These test methods apply to colored artists’ materials. 1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.7 This standard does not purport to address the safety concerns, if 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. Keywords art materials; colorants; lightfastness; lightfastness categories; relative humidity; test specimens; window glass filtered daylight exposure; xenon arc; ICS Code ICS Number Code 87.060.10 (Pigments and extenders) DOI: 10.1520/D4303-10R16 This 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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