chemical fog

chemical fog,

a curtain effect on x-ray film that causes the loss of image quality. It appears as a dull gray discoloration and is usually caused by chemical contamination of the developer.

---

fog (fogging),

n See film fault, fogged.

fog, chemical,

n See film fault.

fog, dyschroic,

n See film fault, dyschroic fog.

fog, light,

n See film fault.

fog, radiation,

n the film darkening caused by radiation from sources other than intentional exposure to the primary beam; e.g., film may be exposed to scatter radiation, or accidental exposure may occur if stored film is not protected from radiation.