Sunscreen Formulation Questions: Reapplication, Emulsifier Compatibility, and Mixing

Question

I am making a sunscreen formula using Milk Lotion Maker™ and Beeswax. I previously had trouble getting a smooth texture but successfully achieved it by adding Satin Cream Maker. I have the following questions: If I apply the sunscreen and then go swimming for 30-40 minutes each time, do I need to reapply every time I get out of the water? I saw the usage instructions for Water-Capsule™ and wondered if it can be used together with Milk Lotion Maker™. Can a handheld food mixer (with 7 speed levels) be used for mixing this type of formula? Additionally, I have an issue with the packaging of Phenoxyethanol SA (Optiphen Plus) and need assistance.

MySkinRecipes Expert · Accepted Answer

Based on the forum thread you provided, here's a summary and answers to your questions regarding your sunscreen formulation:

It's good to hear that adding Satin Cream Maker helped you achieve a smooth cream texture! As the staff confirmed, Satin Cream Maker helps to emulsify and stabilize your formula.

Regarding your questions:

If swimming (30-40 mins each time), do I need to reapply every time I get out of the water?
The Beeswax in your formula does provide some water resistance. However, for extended periods like 30-40 minutes of swimming, it's likely that some of the sunscreen will wash off. The best way to know for sure is to test it yourself. As the staff suggested, check your skin after getting out of the water to see if there is still a noticeable residue of the cream. If there is, it indicates that some protection remains. For optimal protection during prolonged water exposure, reapplying after getting out of the water is generally recommended.
Can Water-Capsule™ be used with Milk Lotion Maker™?
According to the staff's previous reply, Water-Capsule™ cannot be used with other emulsifiers like Milk Lotion Maker™, unless the other emulsifier is specifically Light Cream Maker or Satin Cream Maker. Your current successful formula does not include Water-Capsule™, which aligns with this compatibility information.
Can a handheld food mixer (7 speeds) be used for mixing?
Since you were able to achieve a smooth cream texture using your handheld mixer after adding Satin Cream Maker, it appears that this type of mixer is suitable for emulsifying this specific formula. Achieving a stable emulsion also depends on following the correct mixing procedure (e.g., gradual addition of phases, sufficient mixing speed and time).

In summary, your modified formula with Milk Lotion Maker™, Beeswax, and Satin Cream Maker seems to work for you in terms of texture. Remember that Beeswax contributes to the thickness and some water resistance but can make the texture feel heavier compared to formulas without wax, as noted by the staff.

Regarding the issue with the Phenoxyethanol SA (Optiphen Plus) packaging, please follow the staff's instruction to contact customer care at care@myskinrecipes.com.