Waterproof Sunscreen Formulation with Titanium Dioxide, Water-in-Oil EZ, and Satin Cream Maker
Question
I want to make a waterproof sunscreen with SPF 40 PA+++ using specific ingredients. I have Titanium Dioxide 15nm Liquid, Water-in-Oil EZ (or Oil Blender), and Satin Cream Maker. I understand that a formula using only Satin Cream Maker might not be waterproof.
Could you provide a formula and the detailed mixing procedure to create a waterproof SPF 40 PA+++ sunscreen using these ingredients?
Answer
Based on the information provided in the conversation:
To make a waterproof sunscreen using Titanium Dioxide 15nm Liquid and Water in Oil EZ, you would typically use Water-in-Oil EZ (or Oil Blender) as the emulsifier along with a polymer like Satin Cream Maker. The staff provided a sample formula:
- Oil Phase:
- Titanium Dioxide 15nm Liquid 30%
- Water-in-Oil EZ or Oil Blender 3%
- Water Phase:
- Satin Cream Maker 0.5%
- Water q.s.
Mixing Instructions:
- Heat the oil phase to around 70°C and mix well.
- Mix the water phase until it forms a gel and heat it to a temperature close to the oil phase.
- While continuously mixing the oil phase, slowly add the gel-like water phase into the oil phase little by little.
Regarding protection, Titanium Dioxide is a physical sunscreen filter that provides broad-spectrum protection against both UVA and UVB rays.
For achieving SPF 40 PA+++, the exact percentage needed depends on the specific formulation and would require testing. However, the sample waterproof formula provided by the staff uses 30% Titanium Dioxide 15nm Liquid as an example.
