------Cyanotypes & Photo Emulsion Screen Printing.
Cyanotypes:
"Sir John Herschel, who coined the word photography which literally translates as "light writing", also invented the cyanotype process in 1841. It is a variant of the photogram and commonly understood to be "blue prints." It is a simple process that gives a continuous-tone image of an intense blue color using a sensitizing solution of ammonium ferric citrate and potassium ferricyanide, otherwise known as iron salts. These iron salts, when exposed to natural or artificial ultraviolet light, are reduced to their ferrous state, producing a high contrast blue image when oxidized. Oxidation is hastened by immersion in running water, which also washes away the unused iron salts. The example here from British Algae, 1843-1853, is by Anna Atkins who produced the first botanical work on seaweeds that was entirely illustrated with photographs." http://www.alternativephotography.com/wp/processes/cyanotype/cyanotype-classic-process
Photo Emulsion Screen Printing
"What Is Emulsion - Screen Printing Emulsions are a paste type substance, that when coated onto a mesh with a scoop coater, it dries to form a photographic type of film.
How Is It Used - When the art work is placed on the photo sensitive emulsion, and exposed to light, it creates a stencil of the art. The stencil creates a positive, of which ink can pass through onto a substrate. Emulsions are biodegradable." http://www.ryanrss.com/2EmulsionDisplay.html
How Is It Used - When the art work is placed on the photo sensitive emulsion, and exposed to light, it creates a stencil of the art. The stencil creates a positive, of which ink can pass through onto a substrate. Emulsions are biodegradable." http://www.ryanrss.com/2EmulsionDisplay.html
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