WET PLATE COLLODION PRINT
Wet collodion process, also called collodion process was invented in 1851 by Englishman Frederick Scott Archer. To achieve this look you have to add a soluble iodide to a solution of collodion (cellulose nitrate) and cover a glass plate with that mixture. With a series of other chemicals it goes through the development process in a dark room.
Photos By Guy J Brown
CYANOTYPE
Cyanotype is a photographic blueprint used by engineers to create a simple and low cost process to producing multiple copies of drawings.The English scientist and astronomer Sir John Herschel discovered the procedure in 1842. The process uses two chemicals: ammonium iron(lll) citrate and potassium ferricyanide to achieve the blueprint photo.
Photos By Elisabeth Scheder-Bieschin
GUM BICHROMATE
Gum bichromate is an old photographic printing process based on light sensitivity. Any color can be used for gum printing. The process starts with Gum Arabic being mixed with watercolor and a photo sensitive substance and then brushed onto watercolor paper. When exposed to light the areas where light hits the most, the gum hardens the most and creates a shadow on the photo.
Photos By Robert Demachy
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