The Hidden Alchemy of Film / Plate Photography
At first glance, black-and-white photography feels simple. Light enters a camera, a plate or film is exposed, and in the darkroom an image slowly appears. But beneath that simplicity lies one of the most refined chemical systems ever developed, a process in which light quite literally rearranges atoms of metal.
Every traditional black-and-white photographic plate, sheet film, roll film, and darkroom paper begins with the same essential structure: microscopic crystals of silver halide suspended in gelatin. These crystals are compounds formed between silver and halogen elements, most commonly bromine, sometimes chlorine or iodine. The result is silver bromide, silver chloride, or...