Reduce exposure to the greatest degree possible. Cover windows with shades or drapes that block light entirely. Blocking light in this manner will also help keep a more stable temperature by reducing solar heat gain. Turn off interior lights when not in use. Storing materials in folders and boxes is an excellent way to protect records from light.
Photocopiers can be a powerful source of light.
Avoid repeatedly copying the same record. Provide users with surrogate copies to reduce wear and tear on originals. Even without an expensive filtration system, there are a number of ways to limit the effects of pollutants. The alkaline reserve in these materials will serve as a buffer between the contents and a potentially harsh environment. Boxes and folders meeting the ANSI standard will create a stable micro-environment for permanent records.