Invented in 1840 by William Henry Fox, an Englishman, it was a photographic process that produced a paper negative from which supposedly unlimited photographic prints could be made. Unlike the daguerreotype process, which utilized a unique metal plate, Calotypes opened the door to using photography in publishing. However, the grainy texture of the Calotype paper was its fatal flaw, and it was replaced by 1860 with the glass-plate negative. Source: Robert Atkins, "Artspoke", p. 76 <br><br>An early photographic process, it was patented in 1840 by William H.F. Talbot (English, 1800-1877), the first process to employ a negative to produce a positive image on paper. The earlier daguerreotype process employed no negative.Also known as Talbotype.

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