Alphonse Poitevin
(1819-1882)
French chemist, photographer and engineer
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Alphonse Louis Poitevin (Conflans-sur-Anille, 1819 – Conflans-sur-Anille, 1882) was a French chemist, photographer and civil engineer who discovered the light–sensitive properties of bichromated gelatin and invented both the photolithography and collotype processes.
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| Born |
1819
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| Died |
1882 (aged 62)
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