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There exist several standards for archiving:
 - ISO 18921:2002
 - ISO 18927:2002

The most detailed with technical requirements for CDR media is the
French national standard
 - AFNOR NF Z 42-011-2
http://www.new-medias.com/f_conso.html#afnor (in French)
It specifies 5 classes of CDRs, max. error rates for class 1 being as
follows:
   BLER max. <10
   BLER aver. <5
   E22 = 0
   E32 = 0
CD testers such as StageTech, AudioDev CATS... can measure these
parameters.
Digipress manufacture a special glass "Century Disc" for archiving.

The IASA, EBU and ITU-R also specified recommendations for storage,
see http://www.iasa-web.org/tc04/tc04.htm

EBU:
http://www.ebu.ch/CMSimages/en/tec_text_r97-1999_tcm6-4715.pdf
http://www.ebu.ch/CMSimages/en/tec_text_r105-2001_tcm6-4707.pdf

ITU-R
http://www.itu.int/ITU-R/publications/rec/index.asp
http://www.itu.int/rec/recommendation.asp?type=folders&lang=e&parent=R
-REC-BR.1574

Jos Van Dyck
NGM archiving services


-----Original Message-----
From: Association for Recorded Sound Discussion List
[mailto:[log in to unmask]]On Behalf Of Jerome Hartke
Sent: dinsdag 22 februari 2005 20:05
To: [log in to unmask]
Subject: Re: [ARSCLIST] Preservation project


We cooperated with the National Film Board of Canada in developing
quality
criteria for CD-R discs, and would be pleased to help if we can.

J. Hartke
Media Sciences, Inc.
http://www.mscience.com/
[log in to unmask]