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Films Storage | Moisture Control | Bry-Air Dehumidifier

Film and Micro Film Storage

Moisture Control During Film storage

Moisture is a major source of trouble for magnetic (tapes, cassettes) and photographic media alike. While virtually all photosensitive materials deteriorate with age, the rate is largely dependent upon the ambient weather. Deterioration increases rapidly under high temperature and humidity levels. High humidity alone is usually more harmful than high temperatures.

Effects of Uncontrolled Humidity

  • loss of readable data
  • binder breakdown of magnetic media

Causes of Uncontrolled Humidity

  • decreased magnetic capability and deterioration of the binder/ backing of the tape
  • Microbial growth especially in silver gelatin films
  • Trapped moisture in tubes
  • Condensation

General Recommendation

It is recommended that the medium to be stored at:

Other Film Related Applications Temperature Humidity
°C %RH
Production/Processing
Chilled Rollers for Film Casting < = 10 35
Film Development 21 – 24 50-55
Film Drying 21 – 27 50-55
Film Printing 21 – 27 60
Photo Drying Room 32 – 38 35-45
Photo Finishing Room 22 – 23 40-55
Photographic Film Manufacturing 22 – 24 40-45
Storage
Chromatography Material Storage 20 – 25 30-40
Film Storage 21 15-30
Film Storage, Color 23 – 18 30
Microfilm, Storage -10 (-4) 30-50
Negative Film Storage 5 50
Master film based records 5°C-12°C 30%-40% RH
Magnetic media 18°C-20°C 35%-40%
Optical disks 4°C-20°C  20%-50% RH

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