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John Herschel - Wikipedia
- https://en.wikipedia.org/wiki/John_Herschel
- Sir John Frederick William Herschel, 1st Baronet KH FRS (/ ˈ h ɜːr ʃ əl, ˈ h ɛər-/; 7 March 1792 – 11 May 1871) was an English polymath active as a mathematician, astronomer, chemist, inventor, experimental photographer who invented the blueprint, and did botanical work.. Herschel originated the use of the Julian day system in astronomy.He named seven moons of Saturn …
History Of Photography & When Was Photography Invented
- https://thephotoambition.com/history-of-photography/
- In 1839, Hippolyte Bayard invented a direct positive process, involving exposure of sodium chloride paper to light followed by soaking it in a solution of Potassium Iodide. This paper was then exposed in a camera and fixed with Hyposulphite of soda before drying. The process was permanent but very slow.
Displaying Creativity – The History of Photography
- https://www.creativedisplaysnow.com/articles/displaying-creativity-the-history-of-photography/
- In 1842, Sir John Frederick William Herschel also contributed to the growth of photography. He is credited with the invention of the cyanotype process. Earlier in his career, John discovered that sodium thiosulfate is a solvent of silver halides and will make photographs permanent, calling it hyposulphite of soda.
John Herschel's invention - AlternativePhotography.com
- https://www.alternativephotography.com/cyanotype-history-john-herschels-invention/
- The cyanotype process, also known as the blueprint process, was first introduced by John Herschel (1792 – 1871) in 1842. Sir John was an astronomer, trying to find a way of copying his notes. Herschel managed to fix pictures using hyposulphite of soda as early as 1839.
History of photography - Wikipedia
- https://en.wikipedia.org/wiki/History_of_photography
- The history of photography began in remote antiquity with the discovery of two critical principles: camera obscura image projection and the observation that some substances are visibly altered by exposure to light. There are no artifacts or descriptions that indicate any attempt to capture images with light sensitive materials prior to the 18th century.
Hyposulphite Of Soda - Encyclopedia
- https://theodora.com/encyclopedia/h2/hyposulphite_of_soda.html
- HYPOSULPHITE OF SODA, the name originally given to the substance known in chemistry as sodium thiosulphate, Na 2 S 2 O 3; the earlier name is still commonly used, especially by photographers, who employ this chemical as a fixer. In systematic chemistry, sodium hyposulphite is a salt of hyposulphurous acid, to which Schutzenberger gave the formula H 2 …
The history of anthotypes - AlternativePhotography.com
- https://www.alternativephotography.com/the-history-of-anthotypes/
- Photographers today are deeply indebted to Sir John Herschel. He was the man who first managed to fix photographs, after his discovery that hyposulphite of soda could be used. It is basically the same “hypo” in use today. He coined the terms photography, negative, positive and snap-shot.
39. Hyposulphite Of Soda - stason.org
- https://stason.org/TULARC/recreation/photography/daguerreotype/39-Hyposulphite-Of-Soda.html
- 39. Hyposulphite Of Soda. Hyposulphite of Soda.--This salt forms one of the important chemicals for the Daguerreotype operator. Its application to this art is of an interesting nature. It is used to dissolve the sensitive salt of silver which remains unchanged during the exposure in the camera. It has the property of readily dissolving the ...
Silver and Sunlight | Science History Institute
- https://www.sciencehistory.org/distillations/silver-and-sunlight
- Photography Becomes Public. Daguerre, building on Niépce’s work, had finally created a practical picture-making technique, which he named after himself—much to the surprise of Niépce’s son and heir, Isidore. Daguerre planned to profit from the daguerreotype, but events soon took a different turn, thanks to an unusual man. François-Jean-Dominique Arago began …
history of photography - Daguerreotype | Britannica
- https://www.britannica.com/technology/photography/Daguerreotype
- In 1833 the French-born photographer Hercules Florence worked with paper sensitized with silver salts to produce prints of drawings; he called this process “photography.” However, since he conducted his experiments in Brazil , apart from the major scientific centres of the time, his contributions were lost to history until 1973, when they were rediscovered.
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