ISO INTERNATIONAL STANDARD 1795 Fifth edition 2017-06 Rubber, raw natural and raw synthetic Sampling and further preparative procedures Caoutchouc, naturel brut et synthétique brut Méthodes d'échantillonnage et de préparation ultéerieure Reference number IS0 1795:2017(E) International Organization for Standardization @ IS0 2017 see=ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS under I No reproduction or networking permitted without license from IHS IS0 1795:2017(E) COPYRIGHT PROTECTED DOCUMENT IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, 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 on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Licensee-ZHEJIANG INST OF STANDARDIzRoISQ 7 - All rights reserved networking permited without license from IHS IS0 1795:2017(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Terms and definitions 4 Method of selecting the sample 5 Method of taking the laboratory sample ..2 6 Testing. ..2 7 Preparation of test samples .3 7.1 General .3 7.2 Natural rubber. 3 7.2.1 Homogenizing 3 7.2.2 Chemical and physical tests. .3 7.2.3 Mooney viscosity 3 7.2.4 Plasticity retention index (PRI) 3 7.2.5 Vulcanization characteristics 3 7.3 Synthetic rubbers. 3 7.3.1 Chemical and physical tests. 3 7.3.2 Mooney viscosity 7.3.3 Vulcanization characteristics .5 8 Sampling report. 5 ntemaonalgnzatin7-All rights reserved iii nsee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS under I d without license from IHS