In
article<p0624083ec94aa0988e72(a)[192.168.1.157]>7]>,
      "Zane H. Healy"<healyzh at aracnet.com>  writes:
  I'm getting ready to test out my 9-Track tape
drive before hauling it
 into work for some data recovery.  I have a box of brand new tapes,
 which unfortunately haven't been stored under ideal conditions for
 most of their life (they're probably about 20 years old).  Currently
 they're in the garage, which at the moment is close to freezing.  How
 should I go about bringing the tapes to room temp? 
 I'd take them to the
coldest part of your basement and leave them
 there for a couple days. 
Avoiding condensation might be a good idea. Put it in an airtight bag
while heating it up.
(disclaimer: I have no experience of this kind of thing)
/Pontus