A true soap is made using only plant or animal fats, water & lye. Anything that does not use lye is a detergent and is made using a concoction of chemicals. Soaps tend to be less effective in hard water compared to a detergent – however is a much safer option for the environment & your health.
Castile Soap originated in Castilla Spain & was the soap Cleopatra used! It was historically made with pure olive oil as the only oil/fat.Over the years, the definition of Castile soap has broadened to include other types of vegetable oils such as coconut oil. Dr. Bronner's Soap, which has probably become the most famous commercial liquid castile soap, even has a greater percentage of coconut oil than olive oil. This can be technically known as a Bastille Soap.
It is made from a combination of Olive/ Coconut Oil, water & lye.WHAT IS LYE?Lye is basically a very strong alkaline made from salt that will convert a fat into a soap. It is extremely caustic and care needs to be taken when handling. It comes in two forms sodium hydroxide used for hard soap (like our Organic Coconut Soap or potassium hydroxide used for liquid soaps like our Castile Soap. There is no substitute for lye, nothing else will make oil become soap. All the lye is converted in the saponification process and there should not be residual lye left over in a good quality soap.