What is Castile soap, is a question that has been asked by countless families across the globe. In a nutshell, this product is native to the same region it is named after in Spain. It can be made of many different oils, but olive is the most traditional, and designed to soothe and replenish the skin as a whole.
Castile soap is an old school traditional form of soap. Made with potassium hydroxide as the converting ingredient (converting oil and water to soap) it is much less harsh on the skin than conventional soaps made with caustic soda, aka Sodium hydroxide, or simply lye.
Potassium hydroxide is an alkaline converting agent, whereas sodium hydroxide is an acidic converting agent. What I mean to say, is that at the beginning of the blending process, a soap made with potassium hydroxide will start at a very high (alkaline) PH, and the sodium hydroxide based soak will start at a very low PH (acidic)... either is dangerous to the skin if not converted appropriately. No matter which method you engage to create soap, the goal is to bring the soap to a PH of around 7 to 7.25... and fully convert the agent. Traditionally liquid soaps are made with potassium hydroxide and hard soaps are made with sodium hydroxide, however, the reverse can be true with the correct ratios and attention to recipe.
Another traditional soap made in the same basic way as castile soap, is African black soap. It is of course, also very gentle, yet extremely cleansing on the skin.
All statements on this website have not been evaluated by the TGA * These products are not intended to cure, diagnose or treat disease. Information is for informational purposes only.
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