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Cyanotype
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Marie Ô
Marie Ô
La technique du Cyanotype a été mise au point en 1842 par le scientifique et astronome John Frédérick William Herschel. Ce procédé photographique monochrome utilise 2 produits chimiques : le citrate d’ammonium ferrique et le ferrocyanure de potassium, qui permettent d’obtenir un tirage de couleur bleu de Prusse.
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