A very direct photographic process resulting in monochromatic images in tints and tones of blue. It first appeared in 1842.Examples: Anna Atkins (English, 1799-1871) and Anne Dixon (English, 19th century), Equisetum sylvaticum, 1853, cyanotype photogram,10 x 7 7/8 inches, J. Paul Getty Museum, Malibu, CA. Anna Atkins produced the first photographically illustrated book, British Algae: Cyanotype Impressions, in 1843. She included this photo in her second book, Cyanotypes of British and Foreign Ferns, c. 1860.