Film Storage

Impact of Uncontrolled Humidity

Uncontrolled humidity poses a significant threat to the preservation of magnetic tapes, cassettes, and photographic media. It accelerates deterioration, decreases magnetic capability, and leads to the breakdown of binders and backings, resulting in the loss of readable data.

Consequences of High Humidity

High humidity levels promote the growth of mold, fungus, and microorganisms, which further degrade the integrity of the media. Fungus growth, binder breakdown, and hydrolysis are common issues encountered in storage areas with elevated humidity levels.

Additional Effects

Moisture trapped inside storage areas due to varying humidity levels can cause condensation, exacerbating the degradation process and creating an environment conducive to microbial proliferation.

Causes of Uncontrolled Humidity

Factors such as monsoons and environmental conditions contribute to elevated humidity levels, exacerbating the deterioration of photosensitive materials and magnetic media.

Recommendation

Dehumidification is crucial for preserving rare objects, photosensitive materials, and magnetic media. Maintaining stable humidity and temperature conditions within recommended ranges is essential to prevent degradation and microbial growth.

Solution

Josem offers desiccant dehumidifiers equipped with cooling coils, providing an effective and economical solution for achieving optimal storage conditions. The recommended storage conditions for various media types include:

● Master film-based records: 5°C-12°C (41°F-54°F) at 30%-40% RH

● Magnetic media: 18°C-20°C (64°F-75°F) at 35%-40% RH

● Optical disks: 4°C-20°C (39°F-75°F) at 20%-50% RH

Josem’s desiccant dehumidifiers, in conjunction with air conditioning, create a low-humidity environment that prevents microbial attack and preserves the integrity of stored materials. Archives and libraries should maintain humidity levels of 40%-45% RH to prevent drying out, warping, and mold formation.