DaguerreotypeThe Daguerreotype was the invention of Louis Daguerre and Nicephore Niepce. It was announced in 1839 after years of experimentation by the two men. Mercury, iodine, and silver are used. These photos could allow someone to know what their grandparents looked like, even if they hadn't met them. A Daguerreotype was a positive and negative image at the same time using camera obscura. They are permanently processed on silver-coated copper plates, usually protected by a layer of glass. These photographs are surprisingly very detailed, despite their old nature. CyanotypeScientist and astronomer Sir John Herschel was the inventor of the Cyanotype. It was invented in 1842, following the invention of the Daguerreotype. The chemicals used in a cyanotype were potassium ferrocyanide and ferric ammonium citrate. It was based from salts that presented a blue and white photograph. Sometimes, it can be referred to as a blueprint.
To create a cyanotype, we followed multiple steps provided by our teacher. Firstly, we were handed paper with emulsion painted thinly onto one side. Then, the drying process took place, which consisted of multiple hairdryers and air drying the emulsion. We then chose what we wanted, and arranged our artwork. The above photos were my choices. We laid the transparent photo on top; some people chose flowers, stencils, and other available materials to layer in order to create their cyanotype. Then, we laid our ensembles onto a board where we placed a piece of plastic on top of them. We were then instructed to leave the boards out for 6 to 12 minutes. After our time, we brought them inside and rinsed them in water until the paper was no longer yellow, and it was a vibrant blue color. Following that step, we then moved to the last station, and rinsed our cyanotypes with hydrogen peroxide. Finally, we were able to dry our pieces; my finished products are the above photos.
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AuthorAngel Estrada, photography student in San Diego, California Archives
June 2017
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