ISO INTERNATIONAL STANDARD 19403-2 First edition 2017-06 Paints and varnishes Wettability Part 2: Determination of the surface free energy of solid surfaces by measuring the contact angle Peintures et vernis -Mouillabilité- Partie 2: Détermination de I'énergie libre de surface des surfaces solides par la mesure de I'angle de contact Reference number IS0 19403-2:2017(E) International Organization for Standardization @ IS0 2017 ZHEJIANG INST OF STANDARDIZATION C1 5956617 ted without license from IHS IS0 19403-2:2017(E) COPYRIGHT PROTECTED DOCUMENT IS0 2017, Published in Switzerland 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. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Licensee-ZHEJIANG INST OF STANDARDIZAISQ 07 - All rights reserved networking permited without license from IHS IS0 19403-2:2017(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references ..1 3 Terms and definitions 4 Principle ..1 5 Apparatus and materials ..2 6 Sampling. ..3 7 Procedure ..4 7.1 General for measuring on the horizontal drop ..4 7.1.1 Setting up the contact angle measuring system .4 7.1.2 Test conditions 7.1.3 Conditioning of the test panels ..4 7.2 Measurement .4 7.2.1 General ..4 7.2.2 Staticmethod .4 7.2.3 Dynamic method (progressive contact angle) .5 7.2.4 Determination of the contact angle .6 8 Evaluation .6 8.1 General .. 6 8.2 Owens-Wendt-Rabel-Kaelble method (OWRK method) .6 8.3 Wu method ..7 9 Precision ..8 9.1 General ..8 9.2 Repeatability limit, r .8 9.3 Reproducibilitylimit.R 8 9.4 Calculation in accordance with Owens-Wendt-Rabel-Kaelble method (OWRK method).... 8 10 Test report 9 Annex A (informative) Notes on measuring practice. ..10 Bibliography .14 iii icenSee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 vithout license from IHS