Cosmetics Formulation Development

Please ask anyone who knows about mixing sunscreen. If you want to make SPF-50 sunscreen, you should enter Titanium Dioxide 15nm Liquid and Zinc Oxide 35nm Liquid ? If you want to make SPF-30 sunscreen, you should enter Titanium Dioxide 15nm Liquid and Zinc Oxide 35nm Liquid ? Please ask for help answering questions as a guideline for mixing sunscreen as well. Thank you in advance

Hello, at the rate of SPF 50, there are tests and formula samples. Shown on the product detail page. Titanium Dioxide 15nm Liquid at SPF 30, not tested yet. but to reduce the proportion of use Titanium Dioxide 15nm Liquid down approximately 40-50% from the rate used. for SPF 50