ISO INTERNATIONAL STANDARD 1974 Fourth edition 2012-05-01 Paper Determination of tearing resistance Elmendorf method Papier-Détermination de la résistance au déchirement- Méthode Elmendorf Reference number ISO 1974:2012(E) ISO @ISO2012 by IHS under lic No reproduction n or networking permitted without license from IHS Not for Resale ISO 1974:2012(E) COPYRIGHTPROTECTEDDOCUMENT ISO 2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Casepostale56·CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 4122 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ ISO 2012 -All rights reserved No reproductic etworking permitted without license from IHS Not for Resale ISO 1974:2012(E) Contents Page Foreword ..iv 1 Scope 2 Normative reference: 3 Terms and definitions. 4 Principle. 5 Apparatus 6 Sampling. 7 Conditioning 8 Preparation of test pieces. 9 Adjustment and calibration of apparatus 10 Procedure 11 Calculation and expression of results. 11.1 Tearing resistance 6 11.2 Tearindex 11.3 Coefficient ofvariation 12 Test report Annex A (normative) Adjustment and maintenance of Elmendorf-type tear testers .8 Annex B (normative) Calibration of Elmendorf-type tear testers 10 Annex C (informative) Precision, 12 Bibliography ili se with I cense from IHS Not for Resale