Peter (and others),

On a related note, some moldy acetate reels arrived here
in ziploc bags recently. (1/4" tape, on 7 and 10" plastic reels.)

Typically, and only as a temporary solution, i would keep
them sealed and insert a desiccant into the bag...until such
time as i was able to give them a proper cleaning. But, given
that you're advising against the use of desiccants with acetate
tape, i'm having second thoughts.



Brandon Burke
Archivist for Audio Collections
Hoover Institution Archives
Stanford University
Stanford, CA 94305-6010
vox: 650.724.9711
fax: 650.725.3445
email: [log in to unmask]

On Feb 14, 2007, at 11:03 AM, [log in to unmask] wrote:

> Barbara:
> Polyester-base audio tape, all video tape and optical discs can  
> benefit from
> being stored with desiccant if the temporary storage environment is  
> likely
> to experience high humidity.  These materials include moisture only  
> as a
> "contaminant" and do very well in extremely low humidity.
> Acetate-base audio tape and film should NOT, as a general rule, be  
> sealed
> with a desiccant as some moisture is necessary for their "well being".
> To tell acetate-base audio from polyester, simply hold the tape up  
> with some
> sort of light behind it.  If you can see light through the side of  
> the pack,
> the base is acetate.  If you can't see light, the tape base is  
> polyester.
> (note: be very careful doing this with pancakes- for obvious reasons.)
> Peter Brothers
> 973-777-5055
> [log in to unmask]
> Tape restoration and disaster recovery since 1983
> -----Original Message-----
> From: Association for Recorded Sound Discussion List
> [mailto:[log in to unmask]] On Behalf Of Language Archives
> Sent: Tuesday, February 13, 2007 4:08 PM
> To: [log in to unmask]
> Subject: Re: [ARSCLIST] [LA]Re: [ARSCLIST] Using desiccant with audio
> recordings
> Mike Richter wrote:
>> Language Archives wrote:
>>> I have to pack up my archive for storage in the University library
>>> while construction happens around my space. I was asked about the
>>> need to put (advisability of putting) desiccant in with the
>>> recordings. I don't know for certain how long they will be in
>>> boxes--we may unpack them for access on the other end, and while  
>>> they
>>> think construction will end in August, who knows!
>> I suspect that it will be important to know two things: what sort of
>> material (cylinders, 78s, lacquers, LPs, ??); what sort of storage
>> environment.
> Cylinders, lacquers, LPs, uncoated aluminum, wire, open reel (10-inch
> pancakes--I have been reading that thread with interest!--7-inch and
> 5-inch reels), cassettes, CDs, DVDs (also some video: film,  VHS and
> Beta, DV). I'm sure I missed something. These will be packed in boxes
> with like materials.
> As to the storage environment, I haven't seen it(!). If you have any
> suggestions about questions to ask, that would be helpful.
> Barbara