ISO INTERNATIONAL STANDARD 18923 First edition 2000-06-01 Imaging materials Polyester-base magnetic tape Storage practices Matériaux pour image - Bande magnetique a base de polyester- Pratiques d'emmagasinage Reference number ISO 18923:2000(E) (so @ ISO 2000 ISO 18923:2000(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 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 @ ISO 2000 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic in the country of the requester. ISO copyright office Case postale 56. CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 734 10 79 E-mail [email protected] Web www.iso.ch Printed in Switzerland @ ISO 2000 - All rights reserved ISO 18923:2000(E) Contents Page Foreword. Introductiol VI 1 Scope 2 Normativereferences Terms and definitions 4 Environmental conditions... 5 Materials 9 Enclosures 7 Preparation 8 Storage housing.. 9 Storage rooms. 10 Fire-protective storage. 11 Identification, inspection, and cleaning Annex A (informative) Numbering system for related International Standards Annex B (informative) Stability of cellulose triacetate base... 12 Annex C (informative) Distinction between master tapes and work copies 13 Annex D (informative) Temperature/relative humidity relationship . 14 Annex E (informative) Temperature and humidity acclimatization. 15 Table 1 Maximum temperature and relative humidity for storage. served ili ISO 18923:2000(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas liaison with IsO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission(lEC)onallmattersofelectrotechnicalstandardization. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 18923 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 the :block from 18900 to 18999 (see annex A) Annexes A to E of this International Standard are for information only. ISO 2000 - All rights reserved ISO18923:2000(E) Introduction and computer applications over the past 6o years. Preservation of this information is becoming of increasing concern to society, particularly as the recorded information becomes older and frequently of greater value to libraries, archives, museums, government agencies, and commercial organizations. Magnetic tape is also widely used by individual consumers to preserve records of personal or entertainment value. necessary software. It is recognized that tape records will eventually have to be copied or transferred to another material when the system becomes obsolete. Nevertheless, it is advantageous to prolong the tape life so that the material does not become the controlling factor. Althoughtherehavebeenmanystudiesoftapestability.InternationalStandardsdonotexistagainstwhichtape life can be evaluated. Likewise, International Standards are not av