 Premi per ingrandire
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French photographer, engineer and chemist.
He began photographic research in 1842 while studying civil engineering at the Ecole Centrale, Paris, and continued during his career as a chemical engineer in government service. He is regarded as the practical founder of the carbon print process, photolithography and the collotype process. His inventions included methods for photochemical engraving and daguerreotype plates (c. 1842–8), gelatin negatives on glass , photolithography (1855), photoelectro typing (‘ hélio-plastie ’, patented 1855) and direct paper positives and negatives in colour (results published 1859). During the 1850s, he photographed his fellow workers at Salines in the French Jura and landscapes near his family home, using a paper negative process.
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diversa grafia:
POITEVIN, Alphonse
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History
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* 1819
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Conflans-sur-Anille, Sarthe
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nato
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1842 - 1848
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Invention: Méthodes de gravure photochimique et des plaques de daguerréotype.
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1850 - 1851
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Invention: Négatifs sur verre de gélatine.
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1855
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Dépôt de brevet pour photoelectrotyping 'hélio-plastie'.
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1855
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Dépôt de brevet pour photolithographie.
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1859
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Résultats publiés: positifs directs de papier et négatifs en couleur.
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† 04.03.1882
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Conflans-sur-Anille
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morto
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