Confirming Facial Soap Formula Calculation and Composition for Dry Skin
Question
I'm new to formulating and would like to confirm my facial soap formula, specifically one without xanthan gum for dry skin using Lauryl Glucoside at 3%. I want to make a 100g batch. Is the following formula breakdown in grams correct?
For a 100g batch:
- Lauryl Glucoside: 3 grams
- Propylene Glycol: 30 grams
- Glycerin: 30 grams
- Water: 37 grams
Total: 100 grams
Is this calculation and formula correct?
Answer
Facial Soap Formula Confirmation
Yes, your calculation is correct. For a 100g formula, 3% of any ingredient is equal to 3g. So, using 3g of Lauryl Glucoside in your 100g formula is indeed a 3% concentration.
Your formula for a 100g facial soap for dry skin is:
- Lauryl Glucoside: 3g (3%)
- Propylene Glycol: 30g (30%)
- Glycerin: 30g (30%)
- Water: 37g (37%)
Total: 100g
This formula uses Lauryl Glucoside as a gentle, naturally derived non-ionic surfactant, which is suitable for sensitive and dry skin. Propylene Glycol and Glycerin are included as humectants to help retain moisture, which is beneficial for dry skin. The concentrations of Propylene Glycol (30%) and Glycerin (30%) are within typical usage ranges.
Keep in mind that Lauryl Glucoside is alkaline and typically requires pH adjustment to a range of 5-6.5 for skin compatibility, using an acid like Citric Acid or Lactic Acid. Also, while 3% is a valid concentration, the typical recommended usage rate for Lauryl Glucoside in cleansers is 5-25%, with 5% often recommended for soft skin formulas. Using a lower concentration like 3% might result in less foam or cleaning power, but could be suitable for a very gentle wash for extremely dry skin.
This formula seems like a good starting point for a gentle cleanser for dry skin.
