Use for the process invented by J.N. de Niépce around 1825 in which bitumen that had been coated on glass or metal hardened in relation to exposure; by washing with oil of lavender left only the hardened image area.
AAT
3000133322
13yrs ago
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The Fitzwilliam Museum (2024) "Terminology definition for: heliography" Web page available at: https://collection.beta.fitz.ms/id/terminology/term-28970 Accessed: 2024-11-15 07:46:35
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