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UER Forum > UE Encyclopedia > Cyanotype (Viewed 5671 times) Entry: Cyanotype originally posted by TaP Invented by Sir John Herschel in 1841, an astronomer trying to find a way of copying his notes. This easy process which is composed of white lines on a blue background is created by using a sensitising solution of Ammonium Ferric Citrate and Potassium Ferricyanide. When these substances are exposed to any light, they're reduced to their ferrous state, producing a high contrast blue image when oxidised. Oxidation is accelerated by being washed in running water. This process became popular with pictorialists and was also used for copying architectural plans until it was recently made obsolete by photocopying and computer printers Anna Atkins Polypodium crenatum, Norway, 1854 cyanotype blueprint for construction use http://www.astro.wisc.edu/~mukluk/blprint.html Also see: blueprint Modify this entry  | Remove this entry UER Forum > UE Encyclopedia > Cyanotype (Viewed 5671 times) Add a poll to this thread This thread is one of your Favourites. Click to make normal. Click to make this thread a Favourite. This thread is in a public category, and can't be made private. All content and images copyright © 2002-2024 UER.CA and respective creators. Graphical Design by Crossfire. To contact webmaster, or click to email with problems or other questions about this site: UER CONTACT View Terms of Service | View Privacy Policy | Server colocation provided by Beanfield This page was generated for you in 250 milliseconds. Since June 23, 2002, a total of 738938960 pages have been generated.