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Description of ASTM-C1956 2025ASTM C1956-25Active Standard: Standard Test Method for Laminated Glass Edges when in Contact with Sealants and Glazing TapesASTM C1956Scope 1.1 This test method covers a laboratory screening procedure for determining the compatibility of laminated glass edges with elastomeric glazing sealants and glazing tapes after exposure to heat, humidity, and ultraviolet light. 1.2 This test method is applicable to all types of single or multilayer laminated glazing including but not limited to those containing ethylene vinyl acetate (EVA), ionomer, aliphatic polyurethane (TPU), polyvinyl butyral (PVB) interlayers and glass, and plastic glazing configurations. 1.3 This test method requires the sealant and glazing tape to be in intimate contact with the edge of the laminated glass having the most direct access to the interlayer throughout the test duration. 1.4 This test method does not include assessment of the sealant or glazing tape itself or the sustainability of sealant properties through the exposure. 1.5 This test method includes the observation of two parameters as follows: 1.5.1 Changes in color of the interlayer, and 1.5.2 Changes in the glass to interlayer interface as depicted by bubbles, let-goes, or other visual anomalies at the edge. 1.6 This test method may be conducted in accelerated exposure or natural exposure, or both, according to the procedures outlined. 1.7 This test method is applicable for any liquid sealant, one or more parts, which can be tooled into intimate contact with the laminate edge. 1.8 This test method is applicable to glazing tapes that are capable of achieving and maintaining intimate contact with the laminate edge throughout the test duration. 1.9 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. Note 1: Currently, no comparable ISO standard exists. 1.10 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. 1.11 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 compatibility; glass; laminated glass; sealant; weathering; ICS Code ICS Number Code 81.040.30 (Glass products) DOI: 10.1520/C1956-25 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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