And, by all means, keep them in a dark place.

Steve Smolian

----- Original Message -----
From: <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, March 10, 2005 11:45 AM
Subject: Re: [ARSCLIST] Temperature Requirements for CDs and digital media


> There is an ISO standard (ISO18925 2002) that does provide some general
> recommendations. The following are taken directly from the standard:
>
> Relative Humidity (RH) should be between 20 and 50%.
>
> Cycling of RH should not be greater than plus/minus 10%
>
> Maximum temperature for extended periods should not exceed 25 degrees C.
>
> Temperatures below 23 degrees C are preferable.
>
> Peak temperature should not exceed 32 degrees C.
>
> Useful life will be increased by storing discs at low temperature and low
> relative humidity, since chemical degradation is reduced at these
> conditions. Storage of discs below   -10 degrees C and below 10% RH is not
> recommended.
> ---------------
>
> Note if storing discs at cool or cold temperatures, ensure they are
> packaged correctly in order to avoid moisture condensation on the discs as
> they warm up to use conditions.
>
>
> Joe Iraci
> Senior Conservation Scientist
> Canadian Conservation Institute
>
>
>
>             Christina
>             Hostetter
>             <[email protected]                                          To
>             .ORG>                     [log in to unmask]
>             Sent by:                                                   cc
>             Association for
>             Recorded Sound                                        Subject
>             Discussion List           [ARSCLIST] Temperature Requirements
>             <[log in to unmask]         for CDs and digital media
>             >
>
>
>             10/03/2005 11:04
>             AM
>
>
>             Please respond to
>              Association for
>              Recorded Sound
>              Discussion List
>             <[log in to unmask]
>                     >
>
>
>
>
>
>
> Can anyone tell me what, if any optimal conditions are required for CDs
> and digital media?  I know there are specific temperature requirements
> for magnetic media and film but I don't know if there are any conclusive
> recommendations for digital formats.  Is there an answer to this
> question?
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~
> Christina J. Hostetter
> Archivist/Research Librarian
> Eric Friedheim Library at the
> National Press Club
> 529 14th Street, NW
> Washington, DC  20045
> Tel: (202) 662-7523
> Fax: (202) 879-6725
> www.press.org/library/archives
> ~~~~~~~~~~~~~~~~~~~~~~~~~
>
>
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