We call our products biological because they contain spores of beneficial microbes. These guys hatch when they get water and the right temperatures. They then analyse what is going on around them and produce the correct enzyme to digest whatever they find to eat. Normally what they see as food, is what we see as dirt. A better symbiosis could not be found!
There are no hatched microbes in your soap. There are only spores, or ‘seeds’ if you will. These spores are quite tough. They tolerate temperatures between freezing and 90 degrees Celsius. To keep them stable, we use low levels of potassium sorbate and citric acid. We do not use any other preservatives.
We guarantee our liquid soaps for one year from manufacture, and our dry products for two years. After this, the spores are probably still fine, but the natural ingredients that make up the soap may start to become runny and smell more chemical. The soap never becomes dangerous, but it may be less pleasant to work with, and it may lose functionality.
Do you have a technical question about our products? Do not hesiate to contact me!