Cyanotype is one of the oldest photographic processes. Created in 1842 and first known as “blueprint,” architects and historians used it to document their works. With the advent of digital photography, it is a dying art, but it satisfies photographers’ desires to create something with their hands. With a few non-toxic chemicals, a good image, and the sun, a rich, blue-toned photo develops. Sehgal’s cyanotype work highlights an otherworldly atmosphere that can easily be missed.