Process:
Process questions
- What color was the cyanotype emulsion when it was applied to the paper? - When the cyanotype emulsion was applied to the paper it was a bright yellow and green color
- What happened when it was placed outside in the sunlight? Why? - When it was placed outside in the sunlight
- When your print was removed from the glass and the objects were removed, what did you observe? - We observed that the yellow-green paper hue has turned into a blue-green.
- Describe what happened to the exposed areas of the print and the unexposed areas of the print when it was placed in water. Why do you think this happened? - The exposed areas turned blue, and the unexposed areas were left white.
History-
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The English scientist, astronomer and botanist, Sir John Herschel discovered the Cyanotype in 1842 as a means of ‘copying’ his notes. In the early days the paper was coated with iron salts and then used in contact printing. The paper was then washed in water and resulted in a white image on a deep blue background.
Care with caution for this process uses the following chemicals; citric acid, ammonium iron (3+) salt, and potassium ferricyanide. Potassium Ferricynide- Health 2 Fire- 0 Reactivity- 0 Personal Protection- E Citric Acid, Ammonium iron (3+) salt- Health 1 Fire- 1 Reactivity- 0 Personal Protection- E Eye Contact: Check for and remove any contact lenses. In case of contact, immediately flush eyes with plenty of water for at least 15 minutes. Cold water may be used. Get medical attention if irritation occurs. Skin Contact: Wash with soap and water. Cover the irritated skin with an emollient. Get medical attention if irritation develops. Cold water may be used. Inhalation: If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical attention. |