[ARSCLIST] Ampex 456 and Shamrock 041 Manufacturing Specs?

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Subject: [ARSCLIST] Ampex 456 and Shamrock 041 Manufacturing Specs?
From: Sarah Norris <groovin@xxxxxxxxx>
Date: Sat, 21 Feb 2009 15:59:22 -0800
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Reply-to: groovin@xxxxxxxxx

Hello,
 
I'm looking for any manufacturing information available about Ampex 456 and Shamrock 041 tape.  Anything would help, including manufacturing dates and anything known about materials or formulations used.  All information and references are much appreciated.
 
Thanks,
Sarah Norris

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