Preservation: the storage environment

     The first step in preservation of archival collections is to stabilize the environment in which they are stored.  All archival media deteriorate much more rapidly if left in unstable environments where the temperature and relative humidity are allowed to fluctuate over a wide range.   These fluctuations cause chemical breakdown of the structure of archival media to accelerate.  Poor conditions can promote the growth of mold and cause paper to become brittle much more quickly.  The results are apparent when one opens a box of improperly stored document to discover crumbling paper and mold growing on photographs.
     What can be done to avoid these preservation problems?  Look for a safe, secure environment where climate controls are already in place.  Ideal conditions for medium (paper, photographs, artifacts, etc.) varies, but the average is 68 degrees Fahrenheit and between 45 and 50 percent relative humidity.  These condition are not difficult to maintain in the main living areas of a building with the use of central heating and air conditioning units, room humidifiers and dehumidifiers.  Avoid basements, attics, and other unregulated spaces.  Keep archival collections off the floor and out of danger from water pipes of flooding. 
    Significant improvements in the potential longevity of archival collections can be realized by taking these simple measures.  Other preservation techniques can be taken after the environment has been stabilized.  For answer to preservation questions, contact an Archives and Special Collections staff member or e-mail
archives@depauw.edu

Archives Homepage