heliography
Identification code: 300133322
Hierarchy classification:
Alternative term/s
- bitumen process
- Niépceotype
Anotations
Scope note:
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.
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