University Archives


Microforms can withstand temperatures of up to 65C/150F. They will suffer destruction if exposed to 60% or greater relative humidity for long periods of time.


Film must be kept in clean, cold water and sent to the nearest film processing laboratory as soon as possible. Film cannot be dried before reprocessing because it will adhere to anything it which it comes into contact and be destroyed.

If film cannot be immediately treated, reels must be submerged in clean, cool water (below 18C/65F) in a sealed dark container. Submerge colour film for up to 48 hours, black and white film for 72 hours. 50)Archives & Library Disaster Plan

Only add 1% solution of formaldehyde to the water if advised by a reprocessing centre. This may prevent softening of the film's emulsion; however, if left in the solution too long, the film will crack and flake. 51)Archives & Library Disaster Plan

If reprocessing is not an option, unroll the film, rinse in clean cool water, and lay out on its edge to dry. Ensure that the emulsion does not touch any surface, as it will adhere immediately. 52)Archives & Library Disaster Plan

When dry, rewind the film with a hand-cranked reel, passing the film through flannel. Water spots may remain. 53)Archives & Library Disaster Plan


Remove microfiche from the envelope to avoid sticking.

Wash off the mud and dirt under clean, cold water.

If reprocessing is available, keep the item wet, and envelop in cheesecloth.


Wash off mud or dirt under clean, cold water.

Air dry or dry with cheesecloth.

If damage is more than simple water spots, replicate silver gelatin camera masters if possible. If not, commercially reprocess the film. 54)Archives & Library Disaster Plan


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