During a facial treatment, the negative pole of a galvanic current machine may be used on the skin to:

Using the negative pole of a galvanic current machine during a facial treatment is primarily effective for the process of disincrustation, which involves deep cleaning the skin by breaking down impurities and excess sebum. The negative pole produces a chemical reaction that helps to soften and emulsify these impurities, making it easier to extract them from the pores.

When the negative pole is applied to the skin, it creates a higher pH environment that facilitates the penetration of disincrustation lotions. These lotions typically contain alkaline ingredients that can further assist in loosening debris, oils, and dead skin cells. The result is a thorough cleansing effect that can help clear clogged pores, leading to healthier-looking skin.

In addition to the primary function of the negative pole, it is important to note that while increasing circulation and collagen production are desirable effects of various facial treatments, those results are more closely associated with different modalities or techniques. Moisturizing the skin can also be achieved through other methods but is not a direct effect of the galvanic current's negative pole. Thus, using it specifically for forcing disincrustation lotion into the skin captures the essence of its intended purpose in esthetic treatments.