Compatibility of Zinc PCA and Extracts in Sunscreen Formula with Milk Lotion Maker
Question
I am formulating a facial sunscreen using Milk Lotion Maker. I understand from the website that it is sensitive to electrolytes. I am unsure which of the extracts/actives I plan to use are compatible.
My planned formula structure is:
- 40% phase: Sunscreen + Silicone + Isododecane + LipidSoft
- 60% phase: Water + various extracts/actives
My questions are:
- Considering
Milk Lotion Maker's sensitivity to electrolytes, which of the extracts/actives I plan to use (specifically mentioningZinc PCAas a concern) are compatible and can be included in this formula? - What is the maximum percentage for each extract/active that can be added to this formula structure while maintaining stability?
(Note: The staff response mentioned that Zinc PCA is an electrolyte and not recommended for direct use with Milk Lotion Maker. If necessary, it should be supplemented with other cream makers that are more electrolyte-tolerant, such as Satin Cream Maker, Butter Cream Maker, or Gel Makers like Pro Polymer. The staff also commented that sunscreen formulas should prioritize a lightweight feel, and adding a wide variety and large amount of nourishing ingredients might be more suitable for a night cream formula.)
Answer
Hello!
Regarding your question about the compatibility of ingredients with Milk Lotion Maker for your facial sunscreen formula, based on the information provided:
- Milk Lotion Maker is sensitive to electrolytes.
- Zinc PCA is an electrolyte and is not recommended for use with Milk Lotion Maker as it can cause stability issues.
- If you need to include Zinc PCA, the staff suggests using alternative cream makers or gel makers that are more tolerant to electrolytes, such as Satin Cream Maker, Butter Cream Maker, or Pro Polymer.
Regarding the maximum percentage for each ingredient for stability, the staff did not provide specific percentages for each item. However, they did provide feedback on your overall formulation plan:
- Your planned formula includes a very wide variety of nourishing ingredients (extracts, etc.) in the 60% portion.
- The staff advises that sunscreen formulas should prioritize a lightweight feel for comfortable daily wear.
- Using such a large and diverse range of treatment ingredients might be more suitable for a dedicated skincare product like a night cream, rather than a sunscreen.
In summary, avoid using Zinc PCA with Milk Lotion Maker unless you incorporate an electrolyte-tolerant co-emulsifier or gel maker. Also, reconsider the total number and concentration of nourishing extracts in your sunscreen formula to ensure it remains lightweight and stable.
Related Products Mentioned
Pro Polymer™ (Gel Maker)
Satin Cream Maker™
Zinc PCA
Milk Lotion Maker™
