The maximum amount that Polysorbate 20 and Polysorbate 80 how many percent of water and oil can combine? Then you can only put one or you have to put both.
Hello, I would like to ask how to make a toner with oily ingredients such as น้ำกลั่น 80-90% Rose Hip Oil (Chile, Extra Virgin Organic Fresh) 10-20%, which ingredient can we use to combine water and oil? Please advise.
Hello, Vitamin E (Tocopheryl Acetate) refrigerate 4-8 degrees yes 3 years old, but if mixed into cream and put สารกันเสีย and store at room temperature. Will it be able to stay up to 1 year? The room doesn't have a refrigerator. Thank you.