What humidity range should be maintained for film storage to preserve quality?

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Multiple Choice

What humidity range should be maintained for film storage to preserve quality?

Explanation:
Maintaining humidity around 40-60% relative humidity keeps film in a stable state: enough moisture to prevent static electricity during handling, but not so much moisture that the gelatin emulsion swells, curls, or supports mold growth. If humidity is too low, static discharge can create artifacts on the film and the emulsion can become brittle. If humidity is too high, moisture can cause swelling, curling, sticking, or mold that degrades image quality. The mid-range of 40-60% provides the balance needed to preserve film quality over time.

Maintaining humidity around 40-60% relative humidity keeps film in a stable state: enough moisture to prevent static electricity during handling, but not so much moisture that the gelatin emulsion swells, curls, or supports mold growth. If humidity is too low, static discharge can create artifacts on the film and the emulsion can become brittle. If humidity is too high, moisture can cause swelling, curling, sticking, or mold that degrades image quality. The mid-range of 40-60% provides the balance needed to preserve film quality over time.

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