Electrology History: Timeline for Permanent Methods, 1924

1924 – In 1914, Dr. Henri Brodier of Lyon, France developed thermolysis (thur MOL i sis), a method of hair removal using high frequency or alternating current. this method created heat to destroy the papilla, and soon became popular because it was a much faster technique.

~Modern Electrology: Excess Hair Its Causes and Treatments by Fino Gior

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