What year did Henri St. Pierre and Arthur Hinkel develop The blend method?

The development of The Blend Method by Henri St. Pierre and Arthur Hinkel is historically placed in 1924. This method combined both galvanic and thermolytic techniques to enhance the efficiency of hair removal during electrolysis, leading to better patient outcomes and wider acceptance in the field. The blend method is significant because it allowed practitioners to tackle a broader range of hair types and skin conditions, making electrolysis more versatile compared to purely galvanic or thermolytic methods. Understanding the timing of such developments is crucial, as it provides context for the evolution of electrolysis practices and the technological advancements within the industry.