ISO INTERNATIONAL STANDARD 18930 First edition 2011-10-01 Imaging materials Pictorial colour reflection prints Methods for evaluating image stability under outdoor conditions Materiauxpourl'image- Impressionsdecouleursdereflexion picturale-Methodes d'evaluation dela stabilite d'image dans des conditionsexterieures Reference number ISO 18930:2011(E) ISO @ISO 2011 Copyright Intemational Organization for Standardization ISO 18930:2011(E) COPYRIGHTPROTECTEDDOCUMENT ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing 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 @ ISO 2011 -All rights reserved ISO18930:2011(E) Contents Page Foreword Introduction 1 Scope 2 Normativereferences 3 Terms and definitions. 4 Summary of test practice. 4.1 Acceleratedlaboratoryweatheringtests. 4.2 Outdoorweathering tests .... 5 Significance and use... 5.1 Accelerated laboratory weathering tests.. 5.2 Outdoor weathering tests .... 6 Apparatus.... 6.1 Accelerated laboratoryweatheringtestequipment. 6.2 Outdoor weathering tests .... 7 Interferences 8 Testing time consideration 8.1 Accelerated laboratoryweatheringtests 8.2 Outdoorweatheringtests 9 Safety precautions 10 Test specimens.... 10.1 Substrate,method ofprinting,ink and post-treatment. 10.2 Test image. 10.3 Numberofreplicates.. 10.4 Laminates and encapsulation... 10.5 Identificationofsamples... 10.6 Backingoftestspecimensduringacceleratedlaboratoryweatheringtests 10.7 Specimen preparation foroutdoorweathering tests. 8 11 Conditioning 8 12 Exposureprogramandsettings... 8 12.1 Acceleratedlaboratoryweatheringtests 12.2 Outdoor weathering tests .... 10 13 Procedure. 10 13.1 Steps forlaboratoryacceleratedweatheringtests and outdoor weathering tests 10 13.2 End-point..... 11 13.3 Reportingofacceleratedlaboratoryweatheringtestdata. 11 13.4 Reporting ofoutdoor weatheringtestdata.. .12 AnnexA (normative)Spectralpowerdistributionforaccelerated laboratoryweatheringtests .13 Annex B (informative)Useof anend-pointto determinespecimenfailuretime 14 Bibliography ili Copyight Intemafianal organizson sandardallrights reserved ISO18930:2011(E) Foreword IsO (the International Organization for Standardization) is a worldwidefederationof national standards bodies non-governmental, in liaison with isO, also take part in the work. isO collaborates closely with the International Electrotechnical Commission (IEC) on allmatters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEc Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. rights. IsO shall not be held responsible for identifying any or all such patent rights. Copyrigh ntemafinal Organizatin fte Standardization ISO 2011 -All rights reserved ISO18930:2011(E) Introduction Printed digital images are used in many applications in which they are exposed to outdoor weathering. This International Standard provides standardized test procedures to evaluate image stability both in real-time outdoor weathering tests and in accelerated laboratory simulations of the weathering process. Accelerated laboratory weathering tests have been developed as a result of the desire to obtain test results faster than would be obtained by actual outdoor exposure. However, accelerated weathering tests only have image degradation include light, water, heat, ozone, and loc