Which of the following parameters is essential for effective galvanic hair removal?

Good electrical conductivity is crucial for effective galvanic hair removal because it facilitates the flow of electrical current through the skin and hair follicle. The galvanic method relies on the chemical reaction created by the electrical current to destroy hair follicles. When the conductivity is optimal, the current can efficiently reach the target area, enhancing the efficacy of the treatment.

Without good conductivity, the electrical current may not penetrate deeply enough into the hair follicle, leading to an ineffective treatment. Factors that contribute to conductivity include the moisture content of the skin and the use of a suitable conductive gel or solution during the procedure. This ensures that the current can effectively convert to chemical energy, which is responsible for the hair removal process.

While other factors such as direct contact with the skin, proper application of pressure, and even the type of electrical current used can influence the experience of the treatment, they do not directly impact the core mechanism of hair removal via galvanic technique like electrical conductivity does.