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.
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 |
