What does smoking produce and what does it do to the film?

• A. Dust and Dirt
• B. Smoke reduces contrast
• C. Light; it fogs the film
• D. Moisture causes warping

Answer: (C)

Fogging occurs when stray light reaches the film, adding unwanted density that hides fine details and lowers contrast. In the darkroom, films are highly sensitive to light, so proper safelight use is essential. Smoking in the area introduces smoke particles that scatter and carry light, increasing stray illumination on the film during processing or storage. That excess light exposure produces a hazy overall density—fogging—so the image loses contrast and appears washed out. Other options don’t capture this light-driven fog effect: dust and dirt are surface artifacts, moisture can warp film or trays, but neither describes the general, image-wide density increase caused by unintended light exposure.