ISO INTERNATIONAL STANDARD 638-1 Second edition 2022-03 Paper, board, pulps and cellulosic nanomaterials Determination of dry matter content by oven-drying method - Part 1: Materials in solid form Papiers,cartons,patesetnanomateriauxcellulosiques Determination de lateneur en matieressechespar sechaged l'étuve- Partie 1:Matériaux sous forme solide Reference number ISO 638-1:2022(E) ISO @ISO2022 Copyright Intemational Organization for Standardizatior IS0 638-1:2022(E) COPYRIGHTPROTECTEDDOCUMENT @IS02022 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 anyform 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 CP 401 : Ch.de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website:www.iso.org Published in Switzerland Cymaan IS02022-Allrightsreserved IS0638-1:2022(E) Contents Page Foreword .iv Introduction. ..V 1 Scope. ..1 2 Normativereferences 3 Terms and definitions Principle .3 4 5 Apparatus .3 6 Sampling .3 7 Preparation oftestpieces .3 7.1 General .3 7.2 Paper and board for recycling .3 7.3 Paper, board, pulpand cellulosic nanomaterial in solid form .3 8 Procedure .4 9 Calculationandexpressionofresults ..5 10 Precision 11 Test report AnnexA (informative) Calculation of themoisturecontent AnnexB(informative)Precision ..7 Bibliography .10 iii Copyrigh Intemalinal orghzIS0i222arazAJl rights reserved