ISO INTERNATIONAL STANDARD 18919 First edition 1999-08-01 Imaging materials Thermally processed silver microfilm Specifications for stability Materiaux pour image Microfilm a I'argent traite thermiquement - Spécifications pour la stabilité ISO Referencenumber ISO18919:1999(E) py IHS under lic Not for Resale ISO 18919:1999(E) Contents 1 Scope 2 Normative references 3 Terms and definition 4 Safety and hazards . 3 5 Requirements for the film base 6 Requirements for the thermally processed silver microfilm 3 7 Requirements for the emulsion and backing layers of thermally processed silver microfilm ... .4 8 Requirements for image stability 9 Test methods. 10 Storage of films. ..11 Annex A (normative) Preparation of standard solution of tetrabutylammonium hydroxide.. Annex B (informative) Numbering system for related International Standards. ..14 Annex C (informative) Effect of residual compounds on the thermally processed silver image.... .15 Annex D (informative) Accelerated image stability test for thermally processed silver microfilms... .16 Annex E (informative) Bibliography .... ?ISO1999 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced microfilm, without permission in writing from the publisher. InternationalOrganizationforStandardization Case postale 56 . CH-1211 Geneve 20 · Switzerland Internet iso@iso.ch Printed in Switzerland Not for Resa @ISO ISO18919:1999(E) Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(lSo member bodies). The work of preparing International Standards is normally carried out through iSO technical committees. Each member body interested in a subject for which a technical committee has been established has: liaison with IsO, also take part in the work. IsO collaborates closely with the International Electrotechnicali Commission (IEC) on all matters of electrotechnical standardization. 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. International Standard ISO 18919 was prepared by Technical Committee ISO/TC 42, Photography. This International Standard is one of a series of standards dealing with the physical properties and stability of imagingmaterials.TofacilitateidentificationoftheseInternationalStandards,theyareassignedanumberwithinthe block from 18900 to 18999 (see annex B). ili Not for Resale