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52.4 MB (5.3 MB compressed)
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32.0 x 40.9 cm ⏐ 12.6 x 16.1 in (300dpi)
SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Alphonse-Louis Poitevin (1819-1892), French chemist, photographer and civil engineer whose interest in photography arose from the publication of the Daguerreotype process. The basis of his research was to devise a system of producing multiple images from a single exposure. He made a major contribution in the development of photolithography, introducing a system based on bichromated gelatine in 1855 which he patented and started a small photolithographic printing firm in Paris producing plates for several publications. He also patented the collotype process.
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