At the Canadian Centre for Architecture we store our nitrate negs in an industrial freezer; nonetheless we keep them in Kodak Storage Envelopes for Processed Film (product number 149 0028) to protect them from any possible humidity problems. These envelopes come in 2 sizes - for 4 x 5 and for up to 8 x 10 sheets. Of course this product isn't made any more but you can still get it on Ebay. Since these are heat-sealable foil envelopes, the disadvantage is that you need to cut the package open to get to the negs. But most of our negs have been copies and we haven't been asked for consultation of an original in more than 10 years, as far I as remember. You could fabricate a similar impermeable system out of Marvelseal.
Karen Potje Chef, Conservation/Restauration Head, Conservation/Preservation Centre Canadien d'Architecture 1920, rue Baile, Montréal, Québec Canada H3H 2S6 514 939 7001 x 1236 www.cca.qc.ca<http://www.cca.qc.ca/> ****** Unsubscribe by sending a message to [email protected] Archives through August 2016 at http://cool.conservation-us.org/byform/mailing-lists/cdl/ Archives from September 2016 onward at https://www.mail-archive.com/[email protected]/
