ISO INTERNATIONAL STANDARD 535 Fourth edition 2023-03 Paper and board Determination of water absorptiveness Cobb method Papier et carton - Détermination de la capacite d'absorption d'eau -MéthodedeCobb Reference number IS0 535:2023(E) ISO @ IS0 2023 IS0 535:2023(E) COPYRIGHT PROTECTED DOCUMENT @IS02023 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 on the internet or an intranet, withoutpriorwrittenpermission.Permission can berequestedfrom eitherIso at theaddress below orIso'smemberbodyinthecountryoftherequester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+4122 749 0111 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @IS0 2023 - All rights reserved