Sunscreen SPF50 PA++++ Formulation with Titanium Dioxide & Zinc Oxide: Clear Gel Feasibility

Regarding your question about making a sunscreen with SPF50 PA++++ using Titanium Dioxide 15nm liquid and Zinc Oxide 35nm liquid:

• Achieving specific SPF and PA values requires precise formulation and laboratory testing to confirm the exact percentages needed.
• You can find example sunscreen formulations and SPF test results (SPF 46-51, PA++) on the product page for Titanium Dioxide 15nm Liquid (Product ID 724).
• Adding Zinc Oxide 35nm Liquid (Product ID 725) to the formula will help increase the PA value, as it provides protection against UVA rays.
• Based on the staff's estimation, adding approximately 10% of Zinc Oxide 35nm Liquid to the base formula from the Titanium Dioxide 15nm Liquid product page might help increase the PA value to ++++. However, this is an estimate, and lab testing is the only way to confirm the actual SPF and PA values.
• Regarding the texture, formulations containing both Titanium Dioxide and Zinc Oxide cannot be made into a clear gel.

We recommend starting with the example formula provided on the Titanium Dioxide 15nm Liquid product page and carefully adjusting the percentage of Zinc Oxide 35nm Liquid while keeping in mind that lab testing is necessary for precise SPF/PA claims.