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Alphonse Poitevin

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Title: Alphonse Poitevin  
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Subject: Alphonse, Los Angeles County Museum of Art, Carbon print, Gum bichromate, Collotype, Screenless lithography, Mungo Ponton, List of French inventions and discoveries
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Alphonse Poitevin

Alphonse 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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