An ancient photographic printing process invented in 1842 by John Willam Herschel, cyanotypia or «photography with the sun» makes it possible to obtain monochrome blue prussian prints thanks to a photosensitive solution (ferric ammonium citrate & potassium ferricyanide) exposed to ultraviolet (sun) radiation.
Anna Atkins (1799-1871), a British scientist, was a pioneer in the use of this technique. She is particularly famous for her work around botany and her work «British Algae» (1843), one of the first printed works illustrated from photographs.
The Archives82 team invites you, during a workshop, to come and discover this artisanal photographic process of the nineteenth century. The opportunity to (re)discover the fonds and collections of the archives through a selection of images around the theme of crafts and industry. Participants will make several cyanotype prints based on negatives from these archival images and from plants.