hanaherrera
Active Member
I made a lotion that's meant to be a face cream, again based on Marie Rayma's Summer Face Cream which she posted on her youtube channel and her partner blog site. I didn't have her emulsifier/stabilizer Ritamulse SCG, emollient isoamyl laurate, and gelling agent Sepimax Zen and so I made substitutions based on what I had on hand.
Substituted the ritamulse for olivem 1000, isoamyl laurate for argan oil, and the sepimax for hydroxyethyl cellulose.
My emulsion turned out fine, but I had to adjust my pH. How do you adjust your pH? Do you dilute a sample of your emulsion in deionized water, or do you dip your pH meter directly into your sample emulsion?
Here I tried to do both for comparison. The first image is the pH for the distilled water. The second image is the pH for the diluted sample, and the third was the pH of an undiluted sample.
Found out from a formulator in one of the skin care formulations facebook groups that pH should be checked and adjusted during the water phase -- and is how cosmetic chemists check pH for their water in oil emulsions. I realize it's easier to do it that way since an emulsified product is difficult to break up and separate the water from the colloid stuff so the pH could be checked. I haven't tried the suggestion yet but will it this week when I make a new batch to try another emulsifier.
Substituted the ritamulse for olivem 1000, isoamyl laurate for argan oil, and the sepimax for hydroxyethyl cellulose.
My emulsion turned out fine, but I had to adjust my pH. How do you adjust your pH? Do you dilute a sample of your emulsion in deionized water, or do you dip your pH meter directly into your sample emulsion?
Here I tried to do both for comparison. The first image is the pH for the distilled water. The second image is the pH for the diluted sample, and the third was the pH of an undiluted sample.
Found out from a formulator in one of the skin care formulations facebook groups that pH should be checked and adjusted during the water phase -- and is how cosmetic chemists check pH for their water in oil emulsions. I realize it's easier to do it that way since an emulsified product is difficult to break up and separate the water from the colloid stuff so the pH could be checked. I haven't tried the suggestion yet but will it this week when I make a new batch to try another emulsifier.