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Hi Marcos, The shield pack sleeves were meant to be unsealed at the top, trimmed, and resealed once the disc had been accessed , so I'd just trim them on a paper cutter to fit whatever size box you'd like to use. Bob Hodge Robert Hodge, Senior Engineer Belfer Audio Archive Syracuse University 222 Waverly Ave . Syracuse N.Y. 13244-2010 315-443- 7971 FAX-315-443-4866 >>> [log in to unmask] 2/14/2007 2:31 PM >>> Thank you for all your comments. From the description on the web site, the sleeves I have encountered look a lot like these: http://www.conservationresources.com/Main/section_6/section6_07.htm 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? Thanks again Marcos 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 > FAX-315-443-4866 > > >>>> [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? > > Marcos, > > 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, > because > they inhibited air exchange (i.e. created a micro-environment)and > seemed to > in fact accelerate the degradation of lacquered discs, which of course > do > off-gas. > > I seem to recall that they were developed at least in part by the > Library > of Congress and, if that's so, someone from LC could probably give you > a > more complete history. > > Best, > > Danny > > > Daniel Sbardella > The New York Public Library for the Performing Arts > 40 Lincoln Center Plaza > New York, NY 10023 > > 212.870.1609 >