Sunscreen Formulation Review for Oily Skin

Subject: Review of Sunscreen Formulation

Based on the formula provided, here is an assessment regarding its suitability for oily skin, texture, and estimated SPF/PA:

• Suitability for Oily Skin: The formulation appears well-suited for oily skin. It contains a high percentage of physical filters, various silicones (like Dimethicone and Cyclopentasiloxane), and QuikBlur™. These ingredients are known to provide a dry, non-greasy feel, improve spreadability, absorb excess oil, and leave a smooth, mattifying finish. L-Carnitine is also included, which can help with oil control.
• Texture: With a total of 35% physical filters (Titanium Dioxide and Zinc Oxide) and significant amounts of silicones and powders, the initial texture is likely to be a thick cream or paste rather than a thin liquid. However, the high silicone content, especially volatile silicones like Cyclopentasiloxane, will help it spread easily and evaporate quickly, leaving a dry, comfortable feel on the skin as desired. So, while the initial consistency might be thick, it should provide the desired easy spreading and dry finish.
• Estimated SPF/PA: The combination of 10% Titanium Dioxide and 25% Zinc Oxide is a very high concentration of physical filters. Along with the 5% PMMA Booster, this formulation is expected to provide very high broad-spectrum UV protection. A reasonable estimate for the protection level would be SPF 50+ and PA++++.
• Water/Sweat Resistance: The use of a water-in-oil (W/O) emulsifier (Warp Cream Maker™) and the presence of silicones will contribute to good water and sweat resistance, helping the sunscreen stay on the skin effectively.

Overall, this formulation seems designed to provide high sun protection with a focus on a dry, non-greasy, and water-resistant finish, which aligns well with the requirements for oily skin.