ISO INTERNATIONAL STANDARD 4528 Third edition 2022-06 Vitreous and porcelain enamel finishes Selection of test methods for vitreous and porcelain enamelled areas of articles Finitions en émail vitrifié - Choix des methodes d'essai applicables aux surfaces émaillées de pieces Reference number IS0 4528:2022(E) ISO @ ISO 2022 IS0 4528:2022(E) COPYRIGHTPROTECTED DOCUMENT @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 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: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2022 - All rights reserved