Sunscreen Formulation Mixing Methods

Regarding your question about making sunscreen formulas by hand:

For the formulas you provided, using SPF Protect Ultra II and Titanium Dioxide 15nm Liquid, a high-speed blender is generally required. This is necessary to properly disperse the UV filters and emulsifiers, which ensures you achieve the stated SPF protection and a stable, smooth texture. Hand mixing is typically not sufficient for these types of formulations to achieve optimal performance and stability.

As suggested by our staff, here is an alternative formula that is suitable for hand mixing and provides good SPF/PA protection:

• Tris-Biphenyl Triazine (Nano) 10%
• Light Cream Maker 1%
• Mild Preserved Eco 1%
• Water to 100%

Mixing steps for this formula:

1. Mix Tris-Biphenyl Triazine (Nano) with Water. Stir or blend until homogeneous.
2. Add Light Cream Maker. Stir or blend until a thickened cream texture is achieved.
3. Add Mild Preserved Eco. Stir or blend until well combined.

This formula will yield approximately SPF30, PA+++ with a light texture.

Regarding adding Zinc Oxide 200nm EasyDisperse™ mixed with Cyclomethicone to the Titanium Dioxide 15nm Liquid formula: While it is technically possible to incorporate these ingredients, achieving a stable and effective sunscreen formulation by simply hand mixing and adjusting the water content is challenging. Physical sunscreens like Titanium Dioxide 15nm Liquid and Zinc Oxide 200nm EasyDisperse™ require thorough dispersion for even coverage and optimal UV protection, which is difficult without a blender. Furthermore, combining different emulsifier systems (Milk Lotion Maker in the original formula and the Cyclomethicone base of the Zinc Oxide dispersion) can lead to formulation instability. It is recommended to follow established formulas designed for either hand mixing or blending, using the appropriate equipment for each.