Heliography

This article is about the photographic process. For other uses, see Heliography (disambiguation).
This earliest known surviving heliographic engraving, printed from a metal plate made in 1825 by Joseph Nicéphore Niépce using his "heliographic process".[1] The plate was exposed under an ordinary engraving. Heliography was also used to capture a scene directly from nature with a camera.

Heliography[a] is an early photographic process, based on the hardening of bitumen in sunlight. It was invented by Nicéphore Niépce around 1822.[1] Niépce used the process to make the earliest known surviving photograph from nature, View from the Window at Le Gras (1826 or 1827), and the first realisation of photoresist[2] as means to reproduce artworks through inventions of photolithography and photogravure.

  1. ^ a b "The First Photograph — Heliography". Archived from the original on 2009-10-06. Retrieved 2009-09-29. from Helmut Gernsheim's article, "The 150th Anniversary of Photography," in History of Photography, Vol. I, No. 1, January 1977: ...In 1822, Niépce coated a glass plate... The sunlight passing through... This first permanent example... was destroyed... some years later.
  2. ^ Dyson, R. W. (Robert William), 1942- (1987), Specialty polymers, Blackie ; New York : Chapman and Hall, p. 102, ISBN 978-0-412-01551-9{{citation}}: CS1 maint: multiple names: authors list (link) CS1 maint: numeric names: authors list (link)


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