ISO INTERNATIONAL STANDARD 19496-2 First edition 2017-03 Vitreous and porcelain enamels - Terminology - Part 2: Visual representations and descriptions Emauxvitrifiés-Terminologie- Partie 2: Representations visuelles et descriptions Reference number ISO 19496-2:2017(E) iso Intemational Organization for Standardization @IS02017 =ZHEJIANG INST OF STANDARDIZATION C1 5956617 ted without license from IHS IS019496-2:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS02017,Published inSwitzerland All rights reserved. Unless otherwise specified, 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, 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. ISOcopyrightoffice Ch. de Blandonnet 8. CP 401 CH-1214 Vernier,Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Intematinaibr PrganizationfoStandardization Licensee-ZHEJIANG INST.OF STANDARDIZoISQ0a7 -All rights reserved networking permited without license from IHS Not for Resale, 2017/5/11 02:04:2 IS0 19496-2:2017(E) Contents Page Foreword ..V 1 Scope ..1 2 Normative references 3 Termsanddefinitions 4 Enamelling defects 4.1 Chipping. .1 4.1.1 Further designations 4.1.2 Description .1 4.1.3 Origin and causes 4.2 Lines 3 4.2.1 Hairlines .3 4.2.2 Bubblelines 4 4.2.3 Watermarks .5 4.2.4 Linear cracks .6 4.3 Lumps .6 4.3.1 Further designations .6 4.3.2 Description. .6 4.3.3 Originand causes 6 4.4 Dimples. 7 4.4.1 Further designations .7 4.4.2 Description 7 4.4.3 Origin and causes .7 4.5 Blisters .8 4.5.1 Further designations. 8 4.5.2 Description. ..8 4.5.3 Origin and causes .8 4.6 Spots and specks ..9 4.6.1 Further designations 9 4.6.2 Description. ..9 4.6.3 Origin and causes. 9 4.7 Crawling. .10 4.7.1 Further designations. .10 4.7.2 Description .11 4.7.3 Origin and causes .11 4.8 Copperheads and burn-offs .11 4.8.1 Further designations ..11 4.8.2 Description. .12 4.8.3 Origin and causes. .12 4.9 Fishscales .13 4.9.1 Further designations .13 4.9.2 Description. ..14 4.9.3 Origin and causes .14 4.10 Pinholes. .14 4.10.1 Further designations .14 4.10.2 Description. .14 4.10.3 Origin and causes .15 4.11 Ripples .15 4.11.1 Further designations .15 4.11.2 Description. .15 4.11.3 Origin and causes .15 4.12 Poor adherence. .16 4.12.1 Further designations ..16 4.12.2 Description. .16 Intematinal oganzation @stS.20.17 - All rights reserved iii icensee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 d without license from IHS