Q&A: Do oils have a pH? Can we test the pH of an anhydrous product? If so, what’s the procedure? And a little on pH meters… 

In the October Q&A, Michelle asked: I am wondering if one can test the pH of an anhydrous product? I am making a lovely anhydrous deodorant and would like to proceed with some testing/data gathering. Which meter would be most useful? I have the Jenco Vision Plus but products need to be diluted in water for…