ISO INTERNATIONAL STANDARD 18901 Second edition 2010-05-01 Imaging materials Processed silver- gelatin-type black-and-white films - Specifications for stability Materiaux pour I'image Films noir et blanc de type gélatino- argentique traités - Spécifications relatives a la stabilite Reference number ISO 18901:2010(E) @ ISO 2010 by IHS under lic itted without license from IHS Not for Resale ISO 18901:2010(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The IsO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below COPYRIGHT PROTECTED DOCUMENT @ISO2010 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, 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 2010 - All rights reserved py IHS unde I without license from IHS Not for Resale ISO 18901:2010(E) Contents Page Foreword .iv Introduction 1 Scope 2 Normative references. 3 Terms and definitions. 4 Film base requirements .... 5 Processed film requirements ... 5.1 Storage conditions. 5.2 Safety film...... 5.3 Amount of free acid.... 5.4 Tensile properties and loss in tensile properties 6 Requirements for the emulsion and backing layers of processed film. 6.1 Layer adhesion ... 6.2 Emulsion flow .. 6.3 Blocking..... 6.4 Thiosulfate concentration 6.5 Residual silver compounds. 7 Image-stability requirements 7.1 7.2 Radiographic films 7.3 Microfilms 7.4 Other films 8 Test methods. 8.1 Identificationoffilmbase..... 8.2 Accelerated-ageing conditions .. 8.3 Determination of the amount of free acid ..... 8.4 Tensile property test for processed film..... 8.5 Tape-stripping adhesion test .. 8.6 Humidity-cycling adhesion test .. 8.7 Emulsion-flow test... 10 8.8 Blocking test...... 10 8.9 Residualsilvercompoundtest 8.10 Image-stability test ..... 11 Annex A (informative) Washing and the effect of residual thiosulfate on the developed silver .13 Annex B (informative) Effect of residual silver compounds on the developed silver image.... Annex C (informative) Accelerated image-stability test for radiographic films .. 15 Annex D (informative) Accelerated image-stability test for microfilms.... 17 Annex E (informative) Accelerated image-stability test for aerial films 19 Bibliography. CopyrghtInternational OrganizaionSadardizaoghtsreserved ii Not for Resale