What should the humidity be maintained between for optimal film quality?

Maintaining humidity levels between 40-60% is critical for ensuring optimal film quality in radiography. This humidity range helps to prevent the film from becoming too dry or too moist, both of which can negatively impact the film's performance and the quality of the images produced.

When the humidity is too low (below 40%), the film can develop static electricity, leading to artifacts that interfere with the quality of the radiographic images. Additionally, low humidity can cause film to become brittle, affecting handling and storage.

Conversely, excessive humidity (above 60%) can lead to problems such as film fogging, which reduces overall contrast and, therefore, image clarity. High humidity can also promote the growth of mildew and mold, which can damage film and lead to further complications.

Thus, maintaining the relative humidity within the optimal range of 40-60% ensures that the film is in the best condition for exposure and processing, thereby enhancing the quality of radiographic results.