Microfilm has vinegar smell! (3 messages) SERIALST Moderator 16 Jul 2007 21:11 UTC
3 messages: (1)------------------- Date: Mon, 16 Jul 2007 15:27:10 -0400 From: "Sadowski, Frank" <fsadowski@library.rochester.edu> Subject: RE: [SERIALST] Microfilm has vinegar smell! Kate, Someone else can correct me if I'm wrong, but I believe that's diazo film. The "infection" will not spread, but it will corrode your cabinets. Take the reels out of the cabinets unless you want the cabinets to become quite rusty. We inherited a cabinet which has two nastily rusty looking drawers due to this film. It's been years since I studied the problem, but I think it will also deteriorate the boxes in which they're stored. And I believe the films will become less readable over time. IMHO the best thing you can do is to have them copied to silver film. I don't think they'll ever entirely lose the odor, and housing them as they are is a problem. ------------------------- Frank E. Sadowski Jr. Principal Cataloger River Campus Libraries University of Rochester Rochester, NY 14627-0055 (585) 275-4496 fsadowski@library.rochester.edu -----Original Message----- From: SERIALST: Serials in Libraries Discussion Forum [mailto:SERIALST@LIST.UVM.EDU] On Behalf Of Kate Hood Sent: Monday, July 16, 2007 2:52 PM Subject: [SERIALST] Microfilm has vinegar smell! What are your experiences with "vinegar syndrome"? We have just discovered it in some of our microfilm. Questions I have: 1) How urgent is it to have the film copied once the smell is first detected? (It is old film of our Greensboro newspaper, and the public library - not our library, is the permanent depository.) 2) Can the "infected" reels be isolated in drawers, or does it spread from drawer to drawer? We have noticed it in certain types of boxes only. Thanks for any information you can supply. Kate Hood Library Associate for Serials and Binding Guilford College, Serials Library 5800 W. Friendly Ave. Greensboro, NC 27410 khood@guilford.edu 336-316-2362; 336-316-2449 fax (2)------------------- Date: Mon, 16 Jul 2007 15:22:37 -0400 From: "Stone, Evalyn" <Evalyn.Stone@metmuseum.org> Subject: RE: [SERIALST] Microfilm has vinegar smell! >>From the Heritage Microfilm Co. >(http://www.heritagemicrofilm.com/VinegarSyndrome.aspx): "Most microfilm created prior to 1980 has a backing made of acetate plastic. These acetate films are subject to an additional kind of degradation called "vinegar syndrome". All master microfilm created today uses a polyester plastic backing. Under proper storage conditions, today's film has a 500 year Life Expectance (LE). The older acetate films have no more than a 100 year LE. Since some of this film is now over 60 years old, we are beginning to see more and more vinegar syndrome degradation. When the backing on acetate films begins to degrade it releases acetic acid. This is exactly the kind of acid that makes vinegar smell and taste like vinegar. The release of the acid into the air in the film's canister begins a rapidly accelerating process of film degradation that can only be stopped by duplication onto modern polyester backed film." Please note that this was a convenient place to find the information - I have not used this company and know nothing else about them. <<<<<*>>>>>*<<<<<*>>>>>*<<<<<*>>>>>*<<<<<*>>>>>>*<<<<<*>>>>>*<<<<<*>>>>> Evalyn Stone Serials Librarian, Thomas J. Watson Library The Metropolitan Museum of Art 1000 Fifth Avenue New York, NY 10028-0198 tel: 212/ 650-2446 fax: 212/ 570-3847 e-mail: evalyn.stone@metmuseum.org <<<<<*>>>>>*<<<<<*>>>>>*<<<<<*>>>>>*<<<<<*>>>>>>*<<<<<*>>>>>*<<<<<*>>>>> (3)------------------- Date: Mon, 16 Jul 2007 16:01:12 -0400 From: "Mitchell, Meg" <mitchellm@chc.edu> Subject: RE: [SERIALST] Microfilm has vinegar smell! The cellulose breaking down gives off acid which (along with humidity) you don't want near your "clean" film. Here is technical info right from the film people if you need to prove your point. http://www.kodak.com/US/en/motion/support/storage.jhtml?id=0.1.4.11.12&l c=en Wood and plastic can be highly acidic Solinet is a great source of information on preservation. Lots of links to suppliers and other sources of info http://www.solinet.net/preservation/preservation_home.cfm My sympathy Margaret Mitchell Print Collection Librarian Logue Library Chestnut Hill College 215 248-7073