A fogged film is commonly caused by which factor?

• A. Exposed to light before xray exposure
• B. Fogged film
• C. Scratched
• D. Splashed

Answer: (A)

Fogging happens when the film records some exposure other than the intended x-rays before it is developed. The classic cause is exposure to light prior to exposure to x-rays, such as opening a packet in a lit room or a safelight leaking into the work area. This pre-exposure light darkens the entire film slightly, reducing contrast and masking fine details. Scratches create surface marks rather than a uniform fog, and splashes during processing can cause staining or streaks but not the general, pre-exposure fog described here. So being exposed to light before the x-ray exposure best explains why the film becomes fogged.