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Description of ASTM-D646 2001ASTM D646-96-Reapproved2001Historical Standard: Standard Test Method for Grammage of Paper and Paperboard (Mass Per Unit Area)ASTM D646Scope 1.1 This test method covers the determination of the grammage of paper and paperboard (mass per unit area). In English-speaking countries the customary or commercial practice of expressing the "weight" per unit area (more properly "mass per unit area") of paper has been "basis weight," "ream weight," or "substance," defined as the mass in pounds of a ream of a given sheet size and number of sheets (usually 500 sheets, occasionally 480 sheets). In most other countries and increasingly in English-speaking countries, the mass per unit area is expressed in grams per square metre. The French term for mass per unit area," grammage," is recommended by ISO Committee TC 6 on Paper for use in English as well as in French because of its convenience and clear relationship to grams per square metre. 1.2 The mass per unit area of paperboard has been expressed in the customary system as the mass in pounds per thousand square feet, and in the metric system as grams per square metre. 1.3 The SI metric units, in which grammage (mass per unit area) is expressed in grams per square metre (g/m2), are the preferred units for ASTM test methods for paper and paperboard. 1.4 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 and health practices and determine the applicability of regulatory limitations prior to use. Keywords basis weight; grammage; mass per unit area; paperboard ICS Code ICS Number Code 85.060 (Paper and board) DOI: 10.1520/D0646-96R01 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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