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Henry Fox Talbot
Photographic engraving from a metal plate
National Science and Media Museum
Ref Number: 1937-5106/3
[Curatorial description - National Media Museum - December 2011]
The image was made using the photoglyphic engraving process, invented by Talbot. A chemical mixture was applied to a metal plate, then exposed under an object or a photographic positive. The coating hardened where the light reached it, the plate could then be etched and used for printing.