ISO INTERNATIONAL STANDARD 48-3 First edition 2018-08 Rubber, vulcanized or thermoplastic - Determination of hardness Part 3: Dead-load hardness using the very low rubber hardness (VLRH) scale Caoutchouc vulcanisé ou thermoplastique Deétermination de la dureté- Partie 3: Dureté sous charge constante au moyen de I'échelle de tres faible durete (VLRH) Reference number ISO 48-3:2018(E) ISO @ IS0 2018 Provided by IHS Markit under license with ANSI IS0 48-3:2018(E) COPYRIGHTPROTECTEDDOCUMENT @IS02018 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting below or ISo's member body in the country of the requester. ISO copyright office CP 40i: Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+4122 749 0111 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @IS0 2018 -All rights reserved Provided by IHS Markit under iense withANS IS048-3:2018(E) Contents Page Foreword iv Introduction 1 Seope.. 2 Normative references. 3 Terms and definitions 4 Principle. 5 Apparatus 6 Calibration 7 Test pieces 8 Time interval between forming the testpieces and testing o 9 Conditioning. 10 Temperature oftest 11 Procedure 12 Test report. .3 AnnexA(normatiye)Relationshipbetweenindentationdepthandhardness,and derivationoftheVLRHscale AnnexB(normative)Calibrationschedule Bibliography 10 IS0 2018 - All rights reserved iii Provided by IHS Markit under license with ANSI