Hybrid Silk Sunscreen SPF 50 with Matte Finish and Tone-up Effect

Question

I am looking for a Hybrid Silk Sunscreen formula with a liquid texture (thicker than a serum but lighter than a cream) with the following properties:

Performance: SPF 50, UVA/UVB, matte finish, providing coverage and a soft-focus effect to blur pores.
Skin Finish: Brightens the skin tone (Tone-up) to a very light pink. It should be easy to spread, fast-absorbing, quick-drying, non-greasy, non-whitening, non-streaky, non-comedogenic, and non-irritating.
Highlight: I would like to include a Thai herbal extract as a key feature.

Additional Questions:

Sunscreen Actives: I am interested in combining SPF Protect Ultra™ III with Zinc Oxide to create a hybrid sunscreen. What percentage of each should be used, and which type of Zinc Oxide is recommended to achieve at least SPF 50 + UVA/UVB? Is it necessary to use both?
Texture & Effects: To achieve the matte & soft-focus effect, which powders are recommended? Should I blend Polymethylsilsesquioxane, BB Micro Silk™, and WhiteMatte™, and in what amounts? Are there other powders you would suggest?
Coloring: To achieve a very light pink tone-up effect, is it better to mix Red Oxide + Titanium Dioxide or use the EasyMix versions?
Slip & Glide: Is a slip agent like Aminosilk still necessary to ensure the texture remains liquid, easy to spread, and fast-absorbing? If so, how much should be added?
Extracts: If no Thai herbs are available, would Swiftlet Nest Extract be suitable for this formula, and at what dosage?
Others: Should Vitamin E be included, and which Preservative is recommended?

MySkinRecipes Expert · Accepted Answer

To create a Hybrid Silk Sunscreen with a liquid-to-serum texture, light pink tone-up, and matte finish, I recommend a Water-in-Silicone (W/Si) system. This system provides the "silk" glide, fast absorption, and non-greasy feel you desire. Recommended Formula (Hybrid Silk Sunscreen SPF 50+) Phase A: Oil/Silicone Phase (Sunscreen & Texture) Cyclomethicone: 35.00% (Base for lightness and fast evaporation) SPF Protect Ultra™ III (UVA+UVB): 20.00% (Provides SPF 50) Zinc Oxide 35nm Liquid: 10.00% (Physical sunscreen for UVA protection, non-whitening) SiliSolve Plus™: 2.50% (High-performance W/Si emulsifier) Natural Vitamin E (d-alpha tocopherol): 0.20% (Antioxidant) Phase B: Powder Phase (Matte & Soft Focus) BB Micro Silk™: 4.00% (Provides the "Silk" feel and smooth glide) Polymethylsilsesquioxane 4.5microns: 3.00% (Soft-focus effect to blur pores and matte finish) White Oxides EasyMix™: 2.00% (Titanium Dioxide for tone-up and coverage) Red Iron Oxides EasyMix™: 0.02% - 0.05% (Adjust slowly to achieve the desired light pink shade) Phase C: Water Phase (Actives & Preservative) Water: to 100% Bird (Swiftlet) Nest Extract: 3.00% (Anti-aging and skin repair) Centella Asiatica Extract (Madecassoside 90%): 0.10% (Thai herb "Bua Bok" highlight for soothing and anti-inflammation) Phenoxyethanol (Extra Pure): 1.00% (Preservative) Key Ingredient Insights Hybrid Sunscreen Strategy: SPF Protect Ultra™ III at 20% is the primary driver for SPF 50. Zinc Oxide 35nm Liquid is chosen because it is a liquid dispersion that integrates perfectly into a W/Si system without causing a "white cast" or clumping, ensuring broad-spectrum UVA/UVB protection. Matte & Soft Focus: Combining BB Micro Silk™ and Polymethylsilsesquioxane is ideal. The silk powder provides the unique "silk" skin feel, while the Polymethylsilsesquioxane provides the light-scattering (soft-focus) effect to blur pores. Achieving Light Pink: Using EasyMix oxides is much better than raw powders. White Oxides EasyMix™ provides the base coverage and tone-up, while a tiny amount of Red Iron Oxides EasyMix™ creates the healthy pink glow. Texture & Slip: The Cyclomethicone base ensures the product is liquid and dries quickly. BB Micro Silk™ replaces the need for additional slip agents like Aminosilk, as it provides a superior silky texture. Thai Herb Highlight: Centella Asiatica (Bua Bok) is a famous Thai herb known for its healing properties. Using the high-purity Madecassoside 90% version allows for high efficacy at a low dosage, preventing the formula from becoming too thick or colored. Bird (Swiftlet) Nest Extract is an excellent addition for a premium "skin-treating" sunscreen claim. Mixing Instructions Mix all ingredients in Phase A together until uniform. Add Phase B powders into Phase A and blend/homogenize until the color is perfectly dispersed and no clumps remain. In a separate container, mix Phase C until clear. Slowly pour Phase C into the Phase A+B mixture while stirring or blending at high speed. This "Water-in-Silicone" process requires gradual addition to ensure stability. Continue blending until the texture is a smooth, light liquid-cream. Note: Since this is a Water-in-Silicone formula, it is naturally water-resistant and provides a matte, non-sticky finish.