Blau's father was a doctor in the Austro-Hungarian Medical Corps [de] and was very supportive of her desire to become a painter.

[2] She also studied with Emil Jakob Schindler and they shared a studio from 1875 to 1876, but allegedly broke off the engagement after a quarrel.

In 1883, she converted from Judaism to the Evangelical Lutheran Church[3] and married Heinrich Lang, a painter who specialized in horses and battle scenes.

Blau exhibited her work at the Palace of Fine Arts at the 1893 World's Columbian Exposition in Chicago, Illinois.

She spent her last summer working in Bad Gastein, then went to a sanatorium in Vienna for a medical examination.