ISO INTERNATIONAL STANDARD 16474-1 First edition 2013-11-15 Paints and varnishes Methods of exposure to laboratory light sources Part 1: General guidance Peintures et vernis - Meéthodes d'exposition a des sources lumineuses de laboratoire - Partie 1: Lignes directrices genérales Reference number IS0 16474-1:2013(E) LSO @ IS0 2013 I without license from IHS Not for Resale IS0 16474-1:2013(E) COPYRIGHTPROTECTEDDOCUMENT ISO2013 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 + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2013 - All rights reserved No reproductic networking permited without license from IHS Not for Resale IS0 16474-1:2013(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Terms and definitions ..1 4 Principle .2 4.1 General .2 4.2 Significance .2 4.3 Use of accelerated tests with laboratory light sources 4 5 Requirements for laboratory exposure devices .4 5.1 Irradiance. ..4 5.2 Temperature .6 5.3 Humidity and wetting .8 5.4 Other requirements for the exposure device .9 6 Test specimens - Preparation, replicates, storage and conditioning .9 6.1 Handling of test specimens .9 6.2 Form, shape, preparation .9 6.3 Number of test specimens. .10 6.4 Storage and conditioning .10 7 Test conditions and procedure ..11 7.1 Set points for exposure conditions .11 7.2 Property measurements on test specimens ..11 8 Periods of exposure and evaluation of test results ..12 8.1 General .12 8.2 Sampling. 12 8.3 Determination of changes in properties after exposure 12 8.4 Use of control materials .12 8.5 Use of results in specifications ..12 6 Test report .13 Annex A (informative) Procedure for measuring the irradiance uniformity in the specimen exposurearea .15 Annex B (informative) Factors that decrease the degree of correlation between artificial accelerated weathering or artificial accelerated irradiation exposures and actual- useexposures .18 Annex C (informative) Solar spectral irradiance standard ..21 Bibliography .22 iii se with ISt Not for Resale