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Record 1 1997-11-24


Subject field(s)
  • Photography
  • Solid Fossil Fuels

Niépce used pewter plates in his lithography business, and used various light-sensitive varnishes and pitches as a coating on the metal to record the image. His first success, 1826-27 was with bitumen of Judea coated on a pewter plate. It took 8 hours of exposure to differentially harden the coating, which was washed in oil of lavender diluted with white petroleum. The exposed areas were hardened and did not dissolve; unexposed areas remained soluble and were removed.


The process [Joseph Niepce] developed used a metal plate coated with a thin layer of asphaltum (bitumen of Judea), which became insoluble after exposure to light.


  • Photographie
  • Combustibles fossiles solides

Hydrocarbure de type solide qui, sous l'action de la lumière, devient insoluble dans ses solvants habituels.


Vernis artificiel constituant un enduit hydrofuge employé en photogravure.


Cette propriété, qui a été utilisée par Nicéphore Niepce pour ses premières expériences, est à l'origine de la photographie. Le dépouillement était effectué à l'essence de lavande ou à l'essence de térébenthine.


Le bitume de Judée était extrait du lac Asphaltite (mer Morte) dans l'ancienne Judée.


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