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.
Alphonse Daudet | Alphonse Mucha | Poitevin | Alphonse Merrheim | Alphonse de Lamartine | Roger the Poitevin | Alphonse Juin | Jean-Baptiste Alphonse Karr | Alphonse Royer | Alphonse Milne-Edwards | Alphonse Legros | Louis Alphonse, Duke of Anjou | Louis-Alphonse Boyer | Camille Alphonse Faure | Alphonse Poaty-Souchlaty | Alphonse Loubat | Alphonse Le Gastelois | Alphonse James de Rothschild | Alphonse Boudard | Alphonse A. Kolb | poitevin | Claude Alphonse Delangle | Camille Alphonse Trézel | Alphonse Yanghat | Alphonse Toussenel | Alphonse "Sonny Red" Indelicato | Alphonse Sagebien | Alphonse Roy | Alphonse Pyramus de Candolle | Alphonse Poitevin |
Others experimented with his discovery including Talbot, Edmund Becquerel, Alphonse Poitevin, and John Pouncey, all of whom patented their photographic techniques.