Why did Paula use avobenzone instead of titanium dioxide or zinc oxide in the Sheer Cream Lipstick?
Paula chose avobenzone because both titanium dioxide and zinc oxide are rather opaque mineral sunscreens and it is difficult to create aesthetically pleasing sheer colours with them. In order to achieve an SPF 15 rating, the percentages of titanium dioxide and/or zinc oxide required would have created a fuller coverage lipstick whose colours would be dulled by the matte finish these ingredients have.
Paula chose avobenzone because both titanium dioxide and zinc oxide are rather opaque mineral sunscreens and it is difficult to create aesthetically pleasing sheer colors with them. In order to achieve an SPF 15 rating, the percentages of titanium dioxide and/or zinc oxide required would have created a fuller coverage lipstick whose colors would be dulled by the matte finish these ingredients have.
