Cyanotype: Revision history

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3 February 2026

  • curprev 20:3620:36, 3 February 2026Npk talk contribs 368 bytes +368 Created page with "= a 19th-century camera-less photographic printing process, invented in 1842 by Sir John Herschel, that produces distinctive, monochrome Prussian blue images, often used in art to create ethereal silhouettes, photograms, and blueprints, which uses UV light (sunlight) to develop light-sensitive iron salts on paper or fabric, resulting in a permanent, cyan-blue print."