Aluminum oxidizes.
Some were supplied new with a wax coating and have clups of it that have
turned black, often burried in the grooves.
Steve SmoliaN
-----Original Message-----
From: Association for Recorded Sound Discussion List
[mailto:[log in to unmask]] On Behalf Of Kennedy, Tara
Sent: Friday, September 10, 2010 9:36 AM
To: [log in to unmask]
Subject: Re: [ARSCLIST] acid free sleeves question
Hi all-
From a conservator's perspective, I have to agree 100% with Eric's
explanation. Anything that will slow down the autocatalytic reaction in
lacquered discs is recommended, which includes storage in low temperature
(NOT frozen), low RH (30-40%RH), and in acid-free containers and sleeves.
There is also a type of paper called "Microchamber" that would help combat
any acids being emitted from the nitrocellulose. They make boxes for discs
and other audio recordings that contain cellulose acetate (like magnetic
media). Here is the record box:
http://www.conservationresources.com/Main/section_6/section6_08.htm
As for uncoated aluminum, that metal is inert, so it might not make a
difference. However, if there are paper labels or anything like that, they
would benefit from acid-free sleeves.
Thanks all!
Tara
\o/\o/\o/\o/\o/\o/\o/\o/\o/\o/\o/\o/\o/
Tara D. Kennedy
Preservation Field Services Librarian
Preservation Department
Yale University
Sterling Memorial Library
130 Wall Street
New Haven, CT 06511
(203) 432-4335 (Voice)
(203) 432-9900 (FAX)
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"let me help you help your library!"
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