ISO INTERNATIONAL STANDARD 9211-4 Fourth edition 2022-03 Optics and photonics - Optical coatings - Part 4: Specific test methods: abrasion, adhesion and resistance to water Optiqueetphotonique-Traitementsoptiques Partie 4: Methodes d'essai spécifiques: abrasion, adhérence et résistance a l'eau Reference number IS0 9211-4:2022(E) ISO ISO 2022 IS0 9211-4:2022(E) COPYRIGHTPROTECTEDDOCUMENT ISO2022 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 anymeans, electronic or mechanical, including photocopying, orposting on theinternetoran intranet,withoutpriorwrittenpermission.Permissioncanberequestedfrom eitherIsoattheaddressbelow or ISO's member body in the country of the requester. ISO copyright office CP401 : 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 2022-All rights reserved