Rachel E. Church untitled cyanotype Cyanotype is one of the oldest photographic processes, invented by John Herschel in 1842. Its name references the Greek “cyan,” meaning “dark-blue impression”. The process involves coating paper with a light-sensitive combination of ferric ammonium citrate and potassium ferricyanide. Once the paper is dry, either a
read more Cyanotype Impressions of the Atlantic Ocean in Maine