Cyanotype : The inventor of the Cyanotype was Sir John Herschel in 1842. The chemicals used in a cyanotype are Potassium Ferricy Anide and Ferric Ammonium Citrate. Cyanotypes became commonly known as blueprints in the 20th century. Step by step: Solution A: 25 grams of Ferric ammonium citrate (green) added to 100 ml water. Solution B: 10 grams of Potassium ferricyanide added to 100 ml water. Then in a darkened room we mixed the equal parts of solution A and B. The solution is now light sensitive and should be used immediately and stored in complete darkness. In the same darkened room we coated a piece of watercolor paper (90 puns worlds well) using a small paint brush and dry the paper using a hair dryer. The paper may be stored in a light-tight box for later use. Using the contact printing method expose to the paper to full sun for 15-20 minutes. the yellow emulsion should turn to a steel blue gray color. Exposure times very greatly depending upon the strength of the UV source and the density of the negative. Artificial light sources rich in Uv may be used with testing.
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AuthorMy name is Natalee, I am a senior at Rbv, and I enjoy taking photos. Archives
May 2017
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