And do not store them in envelops whose glued seams come in contact with the negative or print. There are pros and cons for just about every sort of container, but for our climate in the upper Midwest it is best to use polyethylene for negatives and acid-free envelops or folders for prints. Mount prints only with photo corner mounts, unless the photo is expendable such as a copy made for a display. Protect the negative at all costs. Never allow browsing in a negative file.
Store negatives away from the rest of the collection.
Treat tape recordings as fragile items just like photo- graphs. Never allow them near magnets. Oral history tapes are best preserved as open reel to reel tape, one side only, and not in stereo. If cassettes must be used prefer the 30 or 60 minute tapes over the 90 minute tapes. It is best to make a transcription of the tape, but do not destroy the tape after making the transcription.