BS ISO 18928-2013 Imaging materials Unprocessed photographic films and papers Storage practices《成象材料 未经处理的摄影胶片和相纸 存储操作规程》.pdf
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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 18928:2013Imaging materials Unprocessed photographic films and papers Storage practicesBS ISO 18928:2013 BRITISH STANDARDNational forewordThis British Standard is the UK i
2、mplementation of ISO 18928:2013. It supersedes BS ISO 18928:2002, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee CPW/42, Photography.A list of organizations represented on this committee can be obtained on request to its secretary.This publication doe
3、s not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013.ISBN 978 0 580 80507 3 ICS 37.040.20; 37.040.30 Compliance with a British Standard cannot confer imm
4、unityfrom legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2013.Amendments issued since publicationDate Text affectedBS ISO 18928:2013 ISO 2013Imaging materials Unprocessed photographic films and papers Storage pr
5、acticesMatriaux pour limage Films et papiers photographiques non traits Pratiques de stockageINTERNATIONAL STANDARDISO18928Third edition2013-02-01Reference numberISO 18928:2013(E)BS ISO 18928:2013ISO 18928:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2013All rights reserved
6、. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at
7、 the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 18928:2013ISO 18928:2013(E)ForewordISO (the International Organi
8、zation for Standardization) is a worldwide federation of national standards bodies (ISO 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 establishe
9、d has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.I
10、nternational Standards are drafted in accordance with the rules given in the ISO/IEC 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. Publi
11、cation 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 document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent ri
12、ghts.ISO 18928 was prepared by Technical Committee ISO/TC 42, Photography.This third edition cancels and replaces the second edition (ISO 18928:2002), of which it constitutes a minor revision with the following changes: Annex A has been removed. ISO 2013 All rights reserved iiiBS ISO 18928:2013ISO 1
13、8928:2013(E)IntroductionInternational Standards have been written specifying the recommended practices for the storage of processed safety photographic film (ISO 18911), processed photographic reflection prints (ISO 18920), processed photographic plates (ISO 18918), and the specifications for safety
14、 film (ISO 18906).This International Standard is concerned with the storage of unprocessed photographic materials. While many of the recommendations for unprocessed and processed storage are very similar, there are some important differences. These include the very beneficial effects of low temperat
15、ure and the harmful effects of adverse storage and radiation.iv ISO 2013 All rights reservedBS ISO 18928:2013Imaging materials Unprocessed photographic films and papers Storage practices1 ScopeThis International Standard specifies recommended storage conditions for unprocessed photographic materials
16、. It is not applicable to processed films and prints.This International Standard is applicable to black-and-white and colour photographic materials (negative films, positive films, reversal films, positive papers, and X-ray films), as well as to safety films.2 Terms and definitionsFor the purposes o
17、f this document, the following terms and definitions apply.2.1raw photographic materialphotographic material that has not been exposed to actinic radiation and has not been processed3 Storage conditions3.1 GeneralThe photographic properties of imaging materials change during ageing. These changes re
18、sult from high temperatures and high relative humidities and may also be influenced by plastics, papers, solvents, lacquers, varnishes, gases (see 3.4), and extraneous radiation (see 3.5). Frequent temperature changes may also have adverse effects.Changes caused by unfavourable storage conditions ma
19、y be much greater than those due to variations in original manufacture. It is important to comply with the manufacturers recommended storage conditions and, where given, to an expiration date.Films and papers should be exposed and processed as soon as possible after the original package has been ope
20、ned. Opened packages should be resealed under recommended conditions for further storage.3.2 Relative humidityPhotographic material should generally be kept in equilibrium with 40 % to 60 % relative humidity (RH). Containers shall be kept sealed until the material is used.Films and papers are not us
21、ually stored for long periods between exposing and processing. Production schedules, customer needs, latent image fading or growth, etc., are important factors here. Furthermore, vesicular, diazo, thermally processed silver, and electrographic type materials are normally processed immediately.If con
22、ventional sheet films or papers are not to be processed immediately, they may be stored in commercially available light-tight “paper safes” or in the manufacturers original container.The relative humidity of the storage area shall be maintained below 65 % because higher humidities can damage contain
23、ers (e.g. rust), cause labels, tapes and cartons to deteriorate, and encourage the growth of fungi. It can also induce adhesion (blocking) between adjacent laps or layers.Humidities below 30 % can make film and paper temporarily brittle and lead to unacceptable curl and possible emulsion cracking.IN
24、TERNATIONAL STANDARD ISO 18928:2013(E) ISO 2013 All rights reserved 1BS ISO 18928:2013ISO 18928:2013(E)3.3 TemperatureRecommended temperatures during storage depend on the kind of photographic material and on the duration of storage. General guidelines are given in Table 1. In all cases, the informa
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