The Daguerrotype: The Daguerrotype system was invented by Louis Daguerre in 1839. He built off of Nicéphore Niépce, the inventor of the first photograph.Before then, nothing was available to capture a moment like photos do. To make a daguerrotype, one would polish a sheet of silver-plated copper to a mirror finish, treat it with fumes that made its surface light sensitive, expose it in a camera for as long as necessary , which could be as little as a few seconds for bright sunlight to make the resulting latent image on it visible by fuming it with mercury vapor; remove its sensitivity to light by liquid chemical treatment, rinse and dry it, then seal it behind glass. The Cyanotype:
The Cyanotype was developed by Sir John Herschel in 1842, it's been said that he could have been the inventor of photography if he pushed his work to it. Anna Atkins promoted the cyanotype by publishing several books that documented ferns and other plants. The cyanotype became known as the blueprint. The chemicals used to produce the cyanotype are potassium ferricyanide and ferric ammonium citrate. In the procedure, the two solutions are mixed, the mildly photosensitive solution is then applied to a receptive surface (paper or cloth) and allowed to dry in a dark place. Cyanotypes can be created on any surface that absorbs iron. Once the photo is developed, the picture is unreacted and yellow. Running it under water will create the blue effect. Step by Step to create a Cyanotype:
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AuthorHigh school student learning how to capture priceless moments through a lens. Archives
May 2017
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