Storage Conditions

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Documents prefer a temperature of around 15º and a relative humidity of around 50%.  Documents should be stored away from direct sources of heat and light.  Extremes of temperature can cause a speed up of the acid process while extremes in relative humidity will cause the documents to absorb moisture, swell and become distorted. 

Little used spare rooms are ideal storage places for documents while attics, cellars and conservatories are least suitable, due to their fluctuations in temperature and humidity.  Items should not be stored against outside walls as condensation may collect there.