ISO INTERNATIONAL STANDARD 18920 Second edition 2011-10-01 Imaging materials Reflection prints Storage practices Materiaux pour I'image-Tiragesparreflexion-Directivespour 'archivage Reference number ISO 18920:2011(E) LSO @ISO2011 IHS under lic No reproductic r networking permitted without license from IHS Not for Resale ISO 18920:2011(E) COPYRIGHTPROTECTEDDOCUMENT ISO2011 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 No reproductic networking permitted without license from IHS Not for Resale ISO18920:2011(E) Contents Page Foreword ..iv Introduction 1 Scope 2 Normative references. 2 3 Terms and definitions. 2 4 Enclosures and containers 5 Storage housings 3 6 Storage rooms.. 6.1 Medium-term storage rooms. 6.2 Extended-term storage rooms L Environmental conditions. 7.1 Temperature and humidity specifications for storage 7.2 Environmental conditioning requirements... 7.3 Air purity ... 7.4 Light, use, and display. 8 8 Fire-protective storage. 9 Print identification, handling and inspection. 9 9.1 Identification. 9.2 Handling.. 9 9.3 Inspection Annex A (informative) Humidity during storage. 11 Annex B (informative) Temperature during storage 12 Annex C (informative) Temperature/relative humidity relationship.. ..13 Annex D (informative) Distinction between originals and copies made for active use. .14 Annex E (informative)Air-entrained and gaseous impurities... .16 Annex F (informative) Fire protection... .17 Annex G (informative) Silver and colour image degradation. .18 Annex H (informative) Cold storage practices 19 Annex I (informative) Print stability .20 Bibliography 22 ili icense from IHS Not for Resale

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