Fermentation is a chemical or metabolic process induced by living or nonliving organisms like yeast or bacteria that decomposes or converts compounds into other ones. Bread, beer, wine, cheese, yogurt, and vinegar are examples of foods created by fermentation.
In Sexual Alchemy, fermentation is a process whereby the brute mercury - crude, untransmuted sexual energy - is decomposed or converted, extracting energy in the form of electrons, the pure essence of the mercury, called the soul of the mercury. More transmutation frees additional energy, which is added to the soul of the mercury, and eventually originates a new type of mercury called “mercury fecundated by sulfur.” Just as bread rises or yogurt continually expands, this is the rising or expansion of the creative energy known as chi or Kundalini that facilitates the creation of the electronic solar bodies.