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Feb 28, 2023 · Sir John Herschel: The inventor of cyanotypes. Sir John Herschel began by experimenting with sun prints (or photograms). These were one of the earliest forms of photography and involved laying an object on chemically-treated paper before exposing it to a light source.
Feb 7, 2021 · February 7, 2021. A brief history of the cyanotype process – John Herschel’s invention. Writer / Spike MacGee. John Hershel’s cyanotype print ‘Lady with Harp’. The cyanotype process, also known as the blueprint process, was first introduced by John Herschel (1792 – 1871) in 1842.
Dec 7, 2010 · In 1842, Herschel invented the cyanotype. The cyanotype process uses light-sensitive iron salts produced by brushing solutions of ferric ammonium citrate and potassium ferricyanide, also known as Prussian blue, onto paper, which is then dried in the dark.
- Courtney Reed
The cyanotype was discovered, and named thus, by Sir John Herschel who in 1842 published his investigation of light on iron compounds, expecting that photochemical reactions would reveal, in form visible to the human eye, the infrared extreme of the electromagnetic spectrum detected by his father William Herschel and the ultra-violet or ...
Sep 11, 2020 · One method that was introduced in the 19th century is cyanotype photography —an early photographic process known for the brilliant blue (cyan) hue of the final print. It was developed in 1842 by English astronomer Sir John Herschel, who was looking for a way to make copies of his notes.
Feb 18, 2011 · Introduction to the cyanotype process. Invented by Sir John Herschel in 1841, this simple process produces a continuous tone image of Prussian Blue using a sensitizing solution of ferric ammonium citrate and potassium ferricyanide. These iron salts, when exposed to natural or artificial ultraviolet light, are reduced to their ferrous state ...
John Herschel, Portrait by Julia Margaret Cameron, April 1867. Herschel made numerous important contributions to photography. He made improvements in photographic processes, particularly in inventing the cyanotype [30] process, which became known as blueprints, [3] [4] [5] and variations, such as the chrysotype.
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