In the April issue of Abbey Newsletter, a new method of storing microfilm was described, used by the Bank of Canada and the Swedish Archives. The microfilm is packaged in airtight pouches made of inert aluminum foil and polyethylene, backfilling the pouches with nitrogen. The December (1985?) issue of the SMPTE Journal (Society of Motion Picture and Television Engineers) has an article by Roland Gooes and Hans-Evert Bloman, describing how the Swedish Film Institute is using a similar method on all Swedish color feature films: An Inexpensive Method for Preservation and Long-Term Storage of Color Film, p. 1314-1316. Before sealing the films in the pouches, they rewind and condition them in a cabinet which filters the air using Purafil, and controls the temperature and relative humidity. The bags are not backfilled with nitrogen, but since very little air remains inside, the problem of maintaining a constant RH at low temperatures is effectively dealt with. The film can be stored in any freezer. Before use the film is conditioned one day in the bag, then a day or two outside the bag at room temperature.