Because all light will cause damage, conservators recommend that no work on paper be permanently displayed. The best display conditions are those with low light levels and no daylight. Block windows with shades, blinds, or curtains. UV is found in all daylight, most abundantly in sunlight, and in the emissions of certain artificial lights, such as most fluorescent and metal halogen lamps. These bulbs give off heat, however, and should not be placed near the artwork.
Special filters are available to screen out UV radiation.
Inexpensive plastic sleeves can be purchased for fluorescent tubes. High temperature and RH also encourage mold growth and insect activity. Temperature and RH should remain constant. Climatic fluctuations cause expansion and contraction, which can lead to structural damage in paper, weaken the attachment of media, and cause distortions such as rippling of paper. Frames and storage enclosures may provide some degree of protection against daily fluctuations but will not protect paper from long-term or seasonal changes.