ISO INTERNATIONAL STANDARD 8442-9 First edition 2018-02 Materials and articles in contact with foodstuffs - Cutlery and table holloware - Part 9: Requirements for ceramic knives Materiaux et objets en contact avec les denrées alimentaires- Coutellerieetorfevreriedetable- Partie9:Exigences relatives aux couteaux en céramique Reference number IS0 8442-9:2018(E) so @IS02018 IS08442-9:2018(E) COPYRIGHTPROTECTEDDOCUMENT IS02018 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 beloworIso'smemberbodyinthecountryoftherequester ISO copyright office CP 40i: Ch. de Blandonnet 8 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Published in Switzerland ii @ IS0 2018 - All rights reserved IS0 8442-9:2018(E) Contents Page Foreword .iv 1 Scope 2 Normativereferences ..1 3 Terms and definitions 4 Materials and construction .2 5 Performance requirements .2 5.1 Hardnessofceramicblades .2 5.2 Sharpness andedgeretention 2 5.3 Impact resistance of inclined planeofceramic blades 3 5.3.1 General. 3 5.3.2 Apparatus 3 5.3.3 Procedure 3 5.4 Bonding strength ofthe coatingand printing ofceramic blades 3 5.4.1 General 3 5.4.2 Apparatus. 3 5.4.3 Procedure. 3 5.5 Dishwasher safety 4 5.6 Resistance to thermal shock .4 6 Safety instructions .4 AnnexA (normative)Metallographyexamination 5 Annex B (normative) Schematic diagram of impact resistance of inclined plane of ceramic blade..6 Annex C (normative) Bonding strength test apparatus for the coating and printing of ceramic blade .8 Bibliography 9 IS0 2018 - All rights reserved iii