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Cyanotype
Description of process
Cyanotype is a silver-free photographic process that produces an image in blue. This shade is also called "Prussian blue".
Two chemicals are used in the process: iron ammonium citrate and potassium ferricyanide. After the paper is coated with the chemical solution, any part of the surface that is exposed to direct UV light will react and change color.
The success of cyanotype as a form of artistic expression lies in its ability to manipulate or distort. It creates distinctive effects and is versatile, allowing prints to be made on a wide variety of surfaces, including paper, wood, fabric, glass, plexiglass, bone, shell and eggshell, plaster and ceramic, and at any scale.
Anything can be used as a negative for the process: it is either a negative printed on transparent film by a printer, or some objects, such as flowers, pebbles and other things.
