Cyanotype is a photographic printing process that produces a cyan-blue print. Engineers used the process well into the 20th century as a simple and low-cost process to produce copies of drawings, referred to as blueprints. The process uses two chemicals: ammonium iron(III) citrate and potassium ferricyanide. ==History== The English scientist and a...
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blueprint
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• (n.) A photographic picture obtained by the use of a cyanide.
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(from the article `Atkins, Anna`) ...Society members William Henry Fox Talbot and the astronomer and chemist Sir John Herschel, Atkins learned of the photographic process then being ...
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http://www.britannica.com/eb/a-z/c/173
Cy·an'o·type noun [
Cyanide +
-type .] A photographic picture obtained by the use of a cyanide.
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http://www.encyclo.co.uk/webster/C/209
The Cyanotype process is a photographic picture obtained by the use of a cyanide. This process was formerly in very common use by architects and engineers for copying plans, producing an image with white lines upon a blue ground (hence a blue print). Sensitive paper was made by brushing it over with a solution of ferric oxalate (10 grains to the ou...
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a process of photographic printing, used chiefly in copying architectural and mechanical drawings, that produces a blue line on a white background. · a print made by this process.
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