...She gave up oil painting on canvas and developed her characteristic muffling of colors to achieve the effect of dematerialisation - dry painting on cardboard. Additionally, Boznanska didn’t pay attention to preparation of canvas nor to tools. Furthermore, her technique wasn’t very solid, that’s why nowadays conservators have problems to renovate her work. In Paris Boznanska devoted herself to portrait painting, which thanks to her skills, become extraordinary. People inn her paintings seemed to be dim, almost immaterial. Her painting put the emphasis on hands and faces and, above all, eyes which seemed ‘’itself to be a work of art’’. Her characteristic style of painting was a succession of the studio environment and midday sun-light, which was dim by curtains, as well as cigarette smoke. Later another thing which could have been responsible for her dim paintings was her eye disease. [http://artophilia.com/articles/mml-boznanska/]