Many are. But if you're referring to the main one used to form a
stable image on the transparent backing, that would be silver.
the sun
Enlarger
rhenium
Photoflo is a soap-like chemical used to wash the developing chemicals off photographic prints and negatives.
I looked online and I found silver (Element symbol is Ag)
The element used in photographic bulbs is magnesium. When burned, magnesium produces a brilliant white light that is ideal for photography.
The element described is silver.
Used in photographic printing. It's now known as an enlarging easel. It holds the photographic paper in place below an enlarger so that projected enlargements can be made from smaller negatives. Nora Hague Notman Photographic Archives
The element described is silver.
Magnesium is a silvery white metal used in flares fireworks and photographic light bulbs
The element with atomic number 47 is Silver (Ag). It is used in photographic film, as well as solar panels, water filtration, X-rays, and disinfectants.
The element with the atomic number 47 is silver (Ag), and it is used to make photographic film and paper. But the atomic number determined the answer, not its use.