Shampoo Bars and Hard Water
What is hard water?
Hard Water is water with a high mineral content, usually calcium and magnesium, these minerals cause a chemical reaction with traditional soaps that prevent them from working as effectively. Why is there a problem with shampoo bars and hard water?When traditional natural soap comes into contact with the minerals in hard water it causes a chemical reaction that changes the sodium salt component in soaps into their calcium and magnesium salt counterparts, thus resulting in an insoluble white-grey residue.
Having said all that – some people do still love these.