The Sunlit Print That Develops Into Deep Blue
Iron Salts Prepare The Surface: A cyanotype is a photographic print recognized by its rich Prussian-blue color. The traditional process uses two light-sensitive iron compounds, commonly ferric ammonium citrate and potassium ferricyanide. They are mixed according to a tested formula and brushed onto paper, fabric, or another suitable absorbent surface. The coated material is dried away from strong light because ultraviolet light begins the reaction. Artists should follow the chemical supplier’s instructions, wear appropriate gloves, protect the workspace, and keep art equipment separate from food utensils. Careful measuring helps the sensitizer coat and react evenly.