Cyanotype photography was developed by John Hershel in 1840 and it was the first non-silver technology to create photographs. It did not become famous before Anna Atkins, a British scientist, started publishing books with cyanotypes of ferns in 1841.
While usually cyanotypes are created by mixing two chemicals with water before mixing the solutions in equal parts and soaking some cotton rich paper with it, which then - once it is dried - is exposed to UV light to create the photograph, the cyanotypes here are created digitally from color RAW files which I developed in Lightroom and converted into Cyanotypes in Silver Efex Pro.