ISO 12606:1997

INTERNATIONAL IS0
STANDARD 12606
First edition
1997-06-l 5
Cinematography - Care and preservation
of magnetic audio recordings for motion
pictures and television
Cidma tographie - Soins et prkseivation des enregistrements sonores
magnktiques pour la cin&matographie et la tMvision
Reference number
IS0 12606:1997(E)

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IS8 12606: 1997(E)
Foreword
IS0 (the international Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work of
preparing International Standards is normally carried out through IS0
technical committees. Each member body interested in a subject for which
a technical 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. IS0
collaborates closely with the International Electrotechnical 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 IS0 12606 was prepared by Technical Committee
ISO/TC 36, Cinematography.
Annexes A and B of this International Standard are for information only.
0 IS0 1997
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
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INTERNATIONAL STANDARD @ IS0
IS0 12606:1997(E)
Cinematography - Care and preservation of magnetic
audio recordings for motion pictures and television
1 Scope
This International Standard recommends storage conditions for stabilization and preservation of magnetic audio
recordings for motion-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 introduced 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 parties 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 IS0
maintain registers of currently valid International Standards.
ANWNAPM IT9. I I - 1993 : American National Standardfor 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 distortion, and magnetic
corruption [2,3, 10, 11,231. 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 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 the 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.

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@ IS0
IS0 12606:1997(E)
Table 1 - Storage conditions
Extended-term
Medium-term
Equilibrium temperature, ‘C 23 max. 20 max.
20-45 20-30
Equilibrium relative humidity, %
15 max.
Alternative 1: Temperature, ‘C
Alternative 1: Relative humidity, % 20-40
Alternative 2: Temperature, ‘C 10 max.
Alternative 2: Relative humidity, % 20-50
Physical status:
Co-planar Co-planar
Winding
Enclosure Protective Protective
Roll orientation Vertical Vertical
External magnetic field
50 max. 50 max.
DC: Oe
AC: Oe 10 max. 10 max.
5 Derivation of recommended storage conditions
The values in table 1 have been
...