Clay Masks and pH - How to avoid skin irritation
I have recently been formulating a french green clay mask, and noticed it makes the skin red if leaving it on for too long. It’s a temporary redness, but not a feature people appreciate, even though I hear this is ‘normal’ with clay masks. Turns out it’s the clay itself causing the redness, and I hypothesized it was due to their basic pH.
I found a Reddit discussion where a list of Clay pHs was posted http://www.reddit.com/r/SkincareAddiction/comments/19i8w1/psa_aztec_secret_aka_calcium_bentonite_clay/ (no references):
Calcium Bentonite (aka Aztec Secret): 8 - 9.7
French Green (aka Illite Clay or Sea Clay): 7.75
Fuller’s Earth: 7.5
Rhassoul (aka Red Moroccan or Red Clay): 7 - 7.5
Dead Sea Mud: 7
Kaolin (all colors): 6
Moor Mud: 4.5 - 5.5
I’m not sure if these numbers are correct or if it’s even a valid measure, but I have noticed that french green clays cause more irritation than kaolin clay, and using apple cider vinegar to neutralize the pH makes the former less irritating.
For a french green clay mask, are there any ways to make it less irritating without losing it’s oil drawing powers? Adding e.g. citric acid to balance the pH? Adding oils does help, but that seems to defeat the purpose of the mask.
PSA: Aztec Secret (aka calcium bentonite clay) should be mixed with raw apple cider vinegar, not water. from SkincareAddiction