Isolde was one of the few pupils of painter Alfredo Andersen (1860-1935), and also, one of the most productive. She started taking painting classes at the age of 15 and a few years later she went to Berlin to perfect her craft. It was there that she had contact with the European vanguards, an experience that was reflected in her works, markedly Expressionist. Unlike her contemporaries and countrymen, who devoted themselves to the painting of the Araucaria, Isolde dedicated herself to painting of Roble trees and other flowering trees, in which she was able to use intense colors and free strokes.