There are two kinds of electrolysis when it comes to permanently removing hair - galvanic & thermolysis, or a combination of the two at the same time, which is called 'the blend'. 

Galvanic Thermology (a chemical process) - The direct application of an electrical current to a saline solution produces an unusual reaction; the electric current causes salt and water to break down into their respective chemical elements, which are then reorganised into sodium hydroxide (lye), and gas (hydrogen and chlorine). The gas easily dissipates, but the sodium hydroxide (lye) is caustic and acts as a detergent, efficiently destroying the germinative cells that produce hair.

When we insert a thin probe into the hair follicle and apply an electric current, both water and salt from your skin tissue work together to form the necessary saline solution, which is converted into lye, destroying the hair at the root. 

Thermolysis - High-frequency AC current is passed through a probe inserted into the hair follicle alongside the hair. This radio-frequency energy converts to heat within the liquid found in the follicle, which then electrocoagulates (cooks) the surrounding tissue and germinative hair cells, drying them out and ultimately destroying them, whereupon the hair can be easily and permanently removed.

'The Blend' - The blend combines both galvanic and thermolysis techniques for hair removal. In this method, the high-frequency current (thermolysis) is not used to coagulate tissues, but to simply warm them, enhancing the destructive power and the propagation of the lye that's been produced by the galvanic current. 

The thermolysis 'shortwaves' produce vibrations in tissue fluids surrounding the probe. Thanks to these vibrations, the lye produced by the galvanic current will start moving and rapidly saturating the tissues around it. This means that the lye can then be effective on a wider target area and continue it's action after the probe has been removed.

The blend technique is especially effective in cases where hair follicles have become distorted and or difficult to reach with just galvanic thermolysis alone. Together, they enable the lye to reach germinative cells responsible for hair growth more easily.