I am working on my undergraduate project on sunscreen and I am interested in “Titanium Dioxide 250nm WaterDisperse™’ but in the description stated that “This type of Titanium Dioxide is for use in make-up products only. Titanium Dioxide is used in sunscreen products.”
I would like to ask why this Titanium Dioxide 250nm WaterDisperse™ is not suitable as a sunscreen.
What is the minimum SFP value that Titanium Dioxide 250nm WaterDisperse™ can provide?