BS ISO 12606-1997 Cinematography - Care and preservation of magnetic audio recordings for motion-pictures and television《电影摄影技术 电影和电视磁性音频录音胶片的保护和保存》.pdf
《BS ISO 12606-1997 Cinematography - Care and preservation of magnetic audio recordings for motion-pictures and television《电影摄影技术 电影和电视磁性音频录音胶片的保护和保存》.pdf》由会员分享,可在线阅读,更多相关《BS ISO 12606-1997 Cinematography - Care and preservation of magnetic audio recordings for motion-pictures and television《电影摄影技术 电影和电视磁性音频录音胶片的保护和保存》.pdf(18页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD BS ISO 12606:1997 Cinematography Care and preservation of magnetic audio recordings for motion-pictures and television ICS33.160.30;37.060.20BSISO12606:1997 This British Standard, having been prepared under the directionof the Consumer Products and Services Sector Board, was publish
2、ed undertheauthority of the StandardsBoard and comes into effect on 15 September1997 BSI09-1999 ISBN 0 580 28445 X National foreword This British Standard reproduces verbatim ISO12606:1997 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technic
3、al Committee CPW/36, Cinematography, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and
4、European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI S
5、tandards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsib
6、le for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theISO title page, pages ii to iv, pages1 to9 and a back cover. This standard h
7、as been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSISO12606:1997 BSI 09-1999 i Contents Page National foreword Inside front cover Foreword
8、iii Text of ISO12606 1ii blankBSISO12606:1997 ii BSI 09-1999 Contents Page Foreword iii 1 Scope 1 2 Normative reference 1 3 Storage hazards and concerns 1 4 Summation of storage recommendations 1 5 Derivation of recommended storage conditions 2 6 Chemical stability 2 7 Magnetic corruption 3 8 Physic
9、al distortion 3 9 Preparation of media for storage 4 10 Removal of media from low-temperature storage 4 11 Preparation for reproduction after storage 4 12 Preservation of deteriorating recordings 5 Annex A (informative) Additional data 6 Annex B (informative) Bibliography 7 Figure A.1 Cross-section
10、of magnetic recording media (schematic) 6 Table 1 Storage conditions 1 Table A.1 Diversity of analog audio magnetic records 7 Descriptors: Cinematography, motion-picture film, audio data, sound recording, magnetic recording, storage, preservation, stabilization.BSISO12606:1997 BSI 09-1999 iii Forewo
11、rd ISO (the International Organization 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 technic
12、al committee has been established 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 el
13、ectrotechnical 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 least75% of the member bodies casting a vote. International Standard ISO12606 was prepare
14、d by Technical Committee ISO/TC36, Cinematography. Annex A and Annex B of this International Standard are for information only.iv blankBSISO12606:1997 BSI 09-1999 1 1 Scope This International Standard recommends storage conditions for stabilization and preservation of magnetic audio recordings for m
15、otion-picture and television production. It recommends the desirable storage conditions for magnetic audio recordings, as they may remain in library or vault storage between periods of intermittent reproduction or duplication. It describes the care and handling of magnetic media intended to be intro
16、duced into, or removed from, storage. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision and p
17、arties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ANSI/NAPM IT9.11-1993, American National
18、Standard for Imaging Media Processed Safety Photographic Films Storage. 3 Storage hazards and concerns Useful and acceptable reproduction of records removed from inactive storage requires attention to, and precautions against, all three of the following hazards: chemical degradation, physical distor
19、tion, and magnetic corruption2,3,10,11,23. Analog and digital recordings are on media with the same susceptibilities to chemical degradation and physical distortion. They do respond somewhat differently to magnetic corruption effects. The recommendations for storage conditions minimize each of these
20、 risks. 4 Summation of storage recommendations 4.1 Desired useful life of the recordings 4.1.1 Medium-term storage conditions Storage conditions suitable for the preservation of recorded information for a minimum of ten years. 4.1.2 Extended-term storage conditions Storage conditions suitable for th
21、e preservation of recorded information having a permanent value. 4.2 Recommended storage environments Atmospheric temperature and humidity conditions for magnetic media storage are summarized and tabulated in Table 1. Table 1 Storage conditions Medium-term Extended-term Equilibrium temperature, C Eq
22、uilibrium relative humidity,% Alternative1: Temperature, C Alternative1: Relative humidity,% Alternative2: Temperature, C Alternative2: Relative humidity,% 23max. 2045 20max. 2030 15max. 2040 10max. 2050 Physical status: Winding Enclosure Roll orientation Co-planar Protective Vertical Co-planar Prot
23、ective Vertical External magnetic field DC: Oe AC: Oe 50max. 10max. 50max. 10max.BSISO12606:1997 2 BSI 09-1999 5 Derivation of recommended storage conditions The values in Table 1 have been derived from the extensive practical experience with photographic films, as recommended by ANSI IT9.11 for the
24、 minimization of various degradations in monochrome photographic films. Most of the same polymers and modifiers are the major components of magnetic media. Existing data on magnetic media show that the two media are subject to the same degenerative reactions, with reaction rates that are similarly c
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