What happens to film when humidity drops below 40%?

When humidity drops below 40%, static electricity becomes a significant concern for film used in radiography. The reduced moisture in the air allows for an increased accumulation of static charges, which can manifest as static marks on the film. These marks could potentially ruin radiographic images, affecting the quality and clarity of the results.

Maintaining adequate humidity levels is crucial in film handling and storage to minimize static electricity effects. This is particularly important in environments where film is frequently handled, as the movement can generate static charges that lead to imperfections on the imaging medium. Therefore, recognizing the impact of low humidity on static electricity helps in ensuring the integrity of the film and the accuracy of radiographic practices.