Feedback on Your Sunscreen BB Formula

Based on your formula and the discussion:

1. Zinc Oxide (Micronized) Amount and Use with Titanium Dioxide:

   • It is recommended to use both Zinc Oxide and Titanium Dioxide together in sunscreen formulas to achieve broad-spectrum protection against UVA, UVA1, and UVB rays.
   • Your current formula with 5% Zinc Oxide and 5% Titanium Dioxide is estimated to provide an SPF of approximately 20.
   • Regarding the type of Zinc Oxide, while Zinc Oxide (Micronized) can contribute to UV protection, the product description indicates it is less suitable for sunscreen applications requiring high dispersion for optimal performance compared to other grades like Zinc Oxide 200nm EasyDisperse™. If maximizing sun protection efficiency is the primary goal, you might consider using a sunscreen-optimized grade of Zinc Oxide alongside Titanium Dioxide.

2. 5% Titanium Dioxide (Makeup-BB) for BB Effect:

   • Using 5% Titanium Dioxide (Makeup-BB) will provide a noticeable whitening or BB effect on the skin.
   • The intensity of the whitening effect depends on the specific grade of Titanium Dioxide used.
   • Increasing the percentage of Titanium Dioxide can enhance the whitening effect, as suggested in the discussion regarding achieving a stronger BB look. However, be aware that higher concentrations will also increase the likelihood of a visible white cast. For a body product where a whitening effect is desired, 5% is a good starting point, and you can adjust based on your preference for coverage and whitening versus white cast.