ISO INTERNATIONAL STANDARD 19403-7 First edition 2017-06 Paints and varnishes Wettability Part 7: Measurement of the contact angle on a tilt stage (roll-off angle) Peintures et vernis-Mouillabilité- Partie 7: Mesurage de I'angle de contact sur un plan incliné (angle d'écroulement) Reference number IS0 19403-7:2017(E) International Organization for Standardization @ IS0 2017 HEJIANG INSTOFSTANDARDIZATION C15956617 ed without license from IHS IS0 19403-7:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS02017,PublishedinSwitzerland 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 0111 Fax+41227490947 copyright@iso.org www.iso.org Intenationai br PrganizationforStandardization icensee-ZHEJIANG INST.OF STANDARDIZRoISQ s1.7 - All rights reserved I by IHS unde Not for Resale, 2017/9/11 05:52:05 etworking permitted without license from IHS IS0 19403-7:2017(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Principle ..2 5 Apparatus and materials. ..2 6 Sampling. 2, 7 Procedure .4 7.1 General for measuring the roll-off angle .4 7.1.1 Setting up the contact angle measuring system 4 7.1.2 Test conditions. .5 7.1.3 Conditioning of the test panels .5 7.2 Measurement 5 7.2.1 General .5 7.2.2 Application of the drop .5 7.2.3 Determination of the roll-off angle 6 8 Precision ..8 9 Test report ..8 Annex A (informative) Notes on sampling and treatment of test specimens ..10 Annex B (informative) Factors influencing the roll-off angle ..11 Bibliography .13 iii e=ZHEJIANG INSTOFSTANDARDIZATION C15956617 thout license from IHS