Which practice helps prevent fogging of radiographic film during processing?

• A. Maintain proper safelight levels and avoid light leaks
• B. Use the strongest safelight possible
• C. Process films in direct sunlight
• D. Expose the film to room light during processing

Answer: (A)

Fogging occurs when light reaches the film during processing, adding a gray veil that reduces image contrast. The best way to prevent this is to control the darkroom lighting by using a properly rated safelight and eliminating any light leaks. A safelight that is appropriately filtered and dim enough, kept at a safe distance, and checked for leaks minimizes unintended exposure while you handle and process films. That’s why maintaining proper safelight levels and avoiding light leaks is the correct practice.

Using the strongest safelight would increase the risk of fogging, direct sunlight would expose and fog the film immediately, and exposing the film to room light during processing would also cause fogging.