Tuesday, January 22, 2013
Question: Can you use castille soap as a facial cleanser?
Our skin has a pH between 4.7 and 5.5, and we generally formulate our products to be around that pH level. Our surfactants tend to have an acidic pH of 6 or lower and CP soap generally has a pH of over 8, making it an alkaline product.
Some people can handle CP soap on their faces, some can't. This doesn't mean that CP soap isn't good - it's just what some people experience when using this product.
Castille soap is soap made with 100% olive oil. As Beth pointed out the other day, Anne-Marie of Soap Queen fame uses the term "bastille" to refer to soap that has 70% or more olive oil, but includes other butters or oils. Soaps made with any other oil are not called castille!
Is castille the only CP soap we can use as a facial cleanser? No, you can use all manner of CP soaps as your facial cleansers if your skin can handle it. And if you want to use it to make a facial scrub, add your scrubbies and have fun! (And please comment below with your recipe and process so others can learn!)
I really recommend you read the posts below and the comments that go with them if you want to debate or consider this issue further! They make for fascinating reading and it's fun to hear what others have to say. If you are planning to comment, share your experiences but be nice about it. If someone disagrees with you, take the comment as an invitation to a friendly and polite debate!
After much thought and research, it seems to me that the key to using CP soap is to use something superfatted that has a goodly amount of glycerin. But I'm a noob at soap stuff, so my opinion is all based on theory and no experience!
Chemistry of our skin: pH and our skin's acid mantle
Chemistry of our skin: pH of our skin (interesting studies)
Chemistry of our skin: pH and skin care products