Daguerreotype: 1820’s Camera Obscura, Louis Daguerre did a 75ft diorama. 1839 Daguerre used a polished piece of copper coated with silver and iodine on the plate. Using camera obscura he exposed the plate to the image for a set time for the image to set in. After, he then placed it into mercury. Finally the image is then has a liquid chemical applied to it then dried. The image has to be sealed off to prevent change, because light exposure will eventually make it disappear. It is a negative and positive image at the same time. Cyanotype uses the elements potassium, ferricyanide, and Ferric ammonium citrate. Sir John Herschel invented the cyanotype process. This process was unique during its time in which it did not use silver. To make this type of picture you first mix Ammonium ferric citrate and Potassium ferricyanide. After mixing the two together, apply the solution to a canvas or a material you can print the picture on. When you have finished applying the solution you place the object you want to make the picture on it. Depending the amount of UV exposure, the object can take several minutes or a few hours to fully print. After you have finished exposing the picture, rinse the canvas in water for at least five minutes to remove any unexposed chemicals. The end result after the canvas has dried will be a blue image of the object. Cyanotypes were used as blueprints for engineering or contact sheets. This process was very cheap and allowed many people to use it. How I Did My Own
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Author:Thomas Lynch, I'm a dedicated hard worker who loves to express himself through art. Archives
May 2017
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