If photographs are placed in cold storage, the temperature and RH must be closely aligned in order to prevent condensation. Also, inert plastic sleeves should not be used to house individual photographs in cold storage. More specific storage and conservation needs are dependent on the film processes used. Black and white pictures are much more stable than color. Older film, such as cellulose nitrate and cellulose ester films are highly unstable.
Nitrate film can also be very combustible.
Separate cold storage and copying of these materials is necessary. Badly deteriorated film should be disposed of since it poses health, safety, and fire risks. The relatively recent widespread use of electronic and digital media, such as computer diskettes, magnetic tapes, and compact discs, have resulted in some interesting research concerning their preservation and storage. Guidelines for the life expectancy of these materials and how best to take care of them are now available. In general, electronic or digital media should be stored in a dust free environment and away from any magnetic fields.