ISO INTERNATIONAL STANDARD 17223 Firstedition 2014-05-01 Plastics Determination of yellowness index and change in yellowness index Plastiques - Détermination de I'indice de jaunissement et du changement de I'indice de jaunissement Reference number ISO 17223:2014(E) ISO IS02014 IS0 17223:2014(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2014 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 Case postale 56:CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax +4122 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland ii Provided by IHS underlicense with ISO @ IS0 2014 - All rights reserved IS0 17223:2014(E) Contents Page Foreword ..iv 1 Scope 2 Normative references ..1 3 Terms and definitions 4 Preparation and conditioning of samples and test specimens .2 4.1 Sample and preparation of test specimen. .2 4.2 Environment of measurement and standard condition .2 5 Procedure. 2 5.1 General 2 5.2 Transmission measurement method for sheet, film, moulded plaque, or disc specimens...2 5.3 Reflection measurement method for sheet or film specimens 3 5.4 Reflection measurement method for pellet or powder specimens .3 5.5 Measurement requirements. 4 6 Expression of results .5 6.1 Calculationprocedure ofyellowness index. .5 6.2 Calculation procedure of change of yellowness index .6 6.3 Precision .6 7 Test report 9 @ IS0 2014 - All rights reserved iii Provided by IHS under license with ISO