PD IS0/TR 18945:2018 BSl Standards Publication Imperial College London, Version corre Imaging materials Pictorial colour reflection prints - Comparison of image degradation observed between Is0 18930 accelerated weathering test method and outdoor exposure bsi. PUBLISHED DOCUMENT PD IS0/TR 18945:2018 National foreword This Published Document is the UK implementation of IS0/TR 18945:2018. The UK participation in its preparation was entrusted to Technical Committee CPW/42, Photography. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. @ The British Standards Institution 2018 Published by BSI Standards Limited 2018 ISBN 978 0 580 97566 0 ICS 37.040.99 Compliance with a British Standard cannot confer immunity from legal obligations. This Published Document was published under the authority of the Standards Policy and Strategy Committee on 31 October 2018. Amendments/corrigenda issued since publication Date Textaffected PDIS0/TR 18945:2018 TECHNICAL ISO/TR REPORT 18945 First edition 2018-10 Imaging materials Pictorial colour reflection prints Comparison of image degradation observed between Is0 18930 accelerated weathering test method and outdoor exposure Matériaux pour I'image Réflexion des impressions photographiques en couleurs - Comparaison de la dégradation de I'image observée entre la méthode d'essai de vieillissement accéléré de I'ls0 18930 et I'exposition extérieure Reference number IS0/TR 18945:2018(E) Tso @ IS0 2018 PD IS0/TR 18945:2018 IS0/TR 18945:2018(E) , Imperial College London, Version correct as of 26/10/2018 Licensed copy: Imperial College , COPYRIGHT PROTECTED DOCUMENT @I IS02018 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2018 - All rights reserved PD IS0/TR 18945:2018 IS0/TR 18945:2018(E) Contents Page Foreword ..iv Introduction ..V 1 Scope. ..1 Version correct as of26/10/2018 2 Normative references ..1 3 Terms and definitions 4 General considerations for accelerated weathering tests ..2 5 Materials. .4 6 Test methods. .5 6.1 Outdoor exposure tests ..5 6.2 Laboratory accelerated weathering tests ..5 6.3 Data analysis and work-up ..5 7 Results and discussion ..6 7.1 Colour Fade Acceleration Factors .6 7.2 Replicability of data .7 7.3 Applicability to multiple digital printing technologies .8 7.4 Effects of colour and patch darkness .9 7.5 Analysis of colour shifts 7.6 Two-year data analysis 10 7.7 Correlation coefficients and predictive correlations. .11 7.8 Example Degradation of Material H4 ..12 7.9 Comparison of material degradation during outdoor and Is0 18930 accelerated laboratory weathering tests (see Annex G) .14 7.9.1 General .14 7.9.2 Colour fade graphs. 14 7.9.3 Comparison of Is0 18930 accelerated tests to nine outdoor exposure sites. .15 7.9.4 Colour shift graphs.. .15 8 Conclusions and recommendations .15 Annex A (informative) Spectral power distribution for accelerated laboratory weathering tests ..16 Annex B (informative) Photographs of weathered test target degradation .17 Annex C (informative) Comparison of accelerated weathering test methods and outdoor results.21 Annex D (informative) The various types of deterioration observed in Is0 18930 .28 Annex E (informative) Effects of the angle of inclination in outdoor test