Thank you for all your comments. From the description on the web site,
the sleeves I have encountered look a lot like these:
So I assume these are at least similar to the shield-packs. None of them
are sealed, and, again, the records appear to be in mostly good shape.
However, I do not see archival boxes that are big enough to vertically
hold the discs in these sleeves (with their broader seams), which I
assume is the way to go. How are institutions that use the shield-packs
storing their discs?
Robert Hodge wrote:
> We have lacquers which have been in stored successfully in shield pack
> sleeves for 15 or more years.
> None has ever been sealed.
> The discs which have been recently inspected at random are still in the
> same condition as they were received.
> Our choice of the shield pack sleeves was based on the LOC use of them.
> We didn't seal them for the same reason.
> Bob Hodge
> Robert Hodge,
> Senior Engineer
> Belfer Audio Archive
> Syracuse University
> 222 Waverly Ave .
> Syracuse N.Y. 13244-2010
> 315-443- 7971
>>>> [log in to unmask] 2/14/2007 10:58 AM >>>
> We still use the Shield Pack sleeves for lacquer discs here at LC. I
> believe that the issue of inhibited air exchange arose from a very early
> practice of sealing the discs in the sleeves. Obviously that was a bad
> idea. Otherwise, we have not noted any problems with air exchange or
> accelerated degradation of lacquers. The only problem we have had with
> the sleeves - and this was with a later "batch" we had manufactured -
> was that the sleeves arrived badly warped. These we only use for rigid
> discs - glass or metal-based lacquers - and not for more pliable vinyl
> or even shellac.
> Gene DeAnna
> Head, Recorded Sound Section
> MBRS Division
> Library of Congress
> (202) 707-3108
>>>> <[log in to unmask]> 02/14/07 9:44 AM >>>
>> 2. Is anyone familiar with foil-lined sleeves? I have not seen any
> imprinting or other problems with the discs, but is there concern
> of outgassing or any other problems?
> These may be a type of sleeve known as the "shield pack". As far as I
> kno w
> they have been discontinued not because the sleeves off-gassed but,
> they inhibited air exchange (i.e. created a micro-environment)and
> seemed to
> in fact accelerate the degradation of lacquered discs, which of course
> I seem to recall that they were developed at least in part by the
> of Congress and, if that's so, someone from LC could probably give you
> more complete history.
> Daniel Sbardella
> The New York Public Library for the Performing Arts
> 40 Lincoln Center Plaza
> New York, NY 10023