Richard Nicholson documents the last professional darkrooms in London. Darkrooms—like wood shops, machine shops, print shops, scientific laboratories, and painting studios—are magical places filled with the clutter and chaos left behind by creativity.

I enjoy looking at work spaces. Pictures of living spaces (particularly in architectural magazines) usually seem contrived and uninhabited. Work spaces are more honest. Ansel Adams wrote, “There are always two people in every picture: the photographer and the viewer.” But in these pictures, there are three!