When the Daguerreotype was announced on 19 August 1839 at the Académie des Sciences, the Heliography process was also described by Arago. The way in which he presented Niépce's method was done in terms so negative that nobody accorded any importance to asphalt-based heliography. Everybody was infatuated with the daguerreotype, a technique that made the portrait available to everyone.

Nevertheless, although the daguerreotype was universally praised, it was reproached for being a technique that produced a single image. Certain people tried to transform the daguerreotype into an engraved plate that could be used for making printed reproductions of the image. A number of techniques were developed, but they were never applied on any extensive scale since they were very complicated and unreliable.



Engraved plate made from a daguerreotype

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Daguerreotype, Niepce, Nicephore Niepce, House Museum. photography,

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