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Cyanotype is a photographic printing process that produces a cyan-blue print. Engineers used the process well into the 20th century as a simple and low-cost process to produce copies of drawings, referred to as blueprints. The process uses two chemicals: ferric ammonium citrate and potassium ferricyanide.
Discover the women in photography who revolutionised the practice and the photographers keeping the practice at the cutting edge.
Seven contemporary photographers, including Heroine Gohar Dashti, are on display in Blue, at Ingrid Deuss Gallery, Antwerp until September 4.
As museums and galleries in England cautiously prepare to reopen their doors in mid-May, Dulwich Picture Gallery is gearing up to welcome the public back to its newest exhibition Unearthed: Photography’s Roots.