Humidity Levels - McIntire DH-10 Setup And Operation

Humidity Levels

Below are the optimum humidity ranges for various materials as recommended by the National Park
Service (NPS). Please note that humidity is not the only agent of deterioration and other factors
may need to be addressed when storing your equipment. These agents may include visible light, ul-
traviolet radiation, tempurature, dirt, etc. which may effect your environment. These ranges only
address relative humidity levels as recommended by the NPS.
Paintings................................................. 40% - 65%
Paper..................................................... 45% - 55%
Photographs/Film/Negatives......................... 30% - 40%
Other Organics (wood, leather, textiles, etc.).... 45% - 60%
Metals.................................................... <35%
Pg. 6