Film faults: light fogging in Cats (Felis) | Vetlexicon
felis - Images

Film faults: light fogging

ISSN 2398-2950

Contributor(s) :



Film faults: light fogging

= annotation - select to reveal
  1. The lower half of this radiographic film has been exposed to light and has become ''fogged'' (blackened).
  2. The area of exposure to x-rays can be clearly seen on the upper portion of the film.
  3. The brown discoloration is due to degradation of residual fixer left on the emulsion.
  4. The image is visible (and it is clear that exposure factors were adequate) but interpretation is not possible because the lower portion of the image is obscured.
  5. In this case the fogging was caused by the dark room door being opened before the film was completely within an automatic processor.
  6. Other causes of fogging are:
  7. Safelight intensity too high.
  8. Film not stored in light-tight container.
  9. White light penetration into dark room.
  10. Cassette damaged.
  11. Pressure on films during storage.