5) Marcel Wave
In the 1870s a revolutionary hairstyle was created by French hairdresser Marcel Francois Grateau that utilized hot irons to achieve his signature waves. The style was not only very fancy for the average woman, it was hard to get the temperature just right on the waving irons.
While few women could afford to have their treated in the Marcel style or to buy the tools to do it themselves, the style grew in popularity, reaching peak popularity between 1915 and 1930. Bobby pins, curlers, and easier perms meant that by the 1930s women were embracing full curls instead of just waves.