<a href=" https://findartvalue.com/artist/louis-alphonse-davanne">Louis-Alphonse Davanne</a>, French, 1824-1912 Born in Paris, <a href=" https://findartvalue.com/artist/louis-alphonse-davanne">Louis-Alphonse Davanne</a> was a chemist and an important innovator in photographic processes. Beginning in 1852, he spent much of the next 50 years experimenting with methods that led to more permanent pho