Calotype



an early negative-positive photographic process, patented by William Henry Talbot in 1841, in which a paper negative is produced and then used to make a positive contact print in sunlight.
a print made by this process.
Historical Examples

The Nuttall Encyclopaedia Edited by Rev. James Wood
Blackwood’s Edinburgh Magazine, No. CCCXXXVI. October, 1843. Vol. LIV. Various
Great Facts Frederick C. Bakewell
Pilgrimage from the Alps to the Tiber James Aitken Wylie
Leading Articles on Various Subjects Hugh Miller
The Evolution of Photography John Werge
Notes and Queries, Number 223, February 4, 1854 Various
Notes and Queries, Number 20, March 16, 1850 Various

noun
an early photographic process invented by W. H. Fox Talbot, in which the image was produced on paper treated with silver iodide and developed by sodium thiosulphite
a photograph made by this process

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