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Description of ASTM-D3424 2025ASTM D3424-25Active Standard: Standard Practice for Evaluating the Relative Lightfastness and Weatherability of Printed MatterASTM D3424Scope 1.1 This standard describes procedures for the determination of the relative lightfastness and weatherability of printed matter under the following conditions, which involve exposure to natural daylight or accelerated procedures in the laboratory: 1.1.1 Method 1—Daylight behind window glass, 1.1.2 Method 2—Outdoor weathering, 1.1.3 Method 3—Xenon-arc apparatus with window glass filters to simulate daylight behind window glass, 1.1.4 Method 4—Xenon-arc apparatus with water spray and daylight filters to simulate outdoor weathering, 1.1.5 Method 7—Fluorescent lamp apparatus to simulate indoor fluorescent lighting in combination with window-filtered daylight. 1.1.6 Method 8—Fluorescent lamp apparatus operating with fluorescent cool white lamps to simulate indoor fluorescent lighting. Note 1: Previous versions of this standard included Methods 5 and 6 that are based on enclosed carbon-arc exposures. These methods are described in Appendix X1. The spectral irradiance of the enclosed carbon-arc is a very poor simulation of solar radiation, window glass filtered solar radiation, or the emission of lamps used for interior lighting. In addition, enclosed carbon-arc devices are no longer readily available or commonly used. 1.2 These methods require that a suitable print or other control (reference standard) be run along with the test sample. Color changes due to conditions of exposure may be evaluated by visual examination or instrumental measurement. 1.3 These methods are applicable to prints on any flat substrate including paper, paperboard, metallic foil, metal plate, and plastic film, and are produced by any printing process including letterpress, offset lithography, flexography, gravure, and silk screen. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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. For specific hazard statements, see Section 8. 1.6 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. Keywords accelerated exposure; carbon-arc apparatus; color difference measurements; daylight behind window glass; fluorescent lamp apparatus; gray scale; lightfastness; outdoor exposure; printed matter; printing inks; weatherfastness; xenon-arc apparatus; ICS Code ICS Number Code 87.080 (Inks. Printing inks) DOI: 10.1520/D3424-25 The following editions for this book are also available...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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