Alphonse Louis Poitevin
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 . 
<triplet> Alphonse Louis Poitevin <subj> Conflans-sur-Anille <obj> place of birth