heliographs (photographs)

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Scope note
Photographs made by dissolving light-sensitive bitumen in oil of lavender and applying a thin coating over a polished metal plate, or other substrate. The process was invented ca.1822 by Joseph Nicéphore Niépce, and is considered the first process to produce a permanent photographic image from a camera projection.
heliographs
Accepted term: 25-Nov-2024