Ca
Calcium Aluminum Borosilicate
Calcium Aluminum Borosilicate
A glass base for color in makeup.
What it does
It’s a glass made with calcium, aluminum, boron and silica, ground into fine flakes that give makeup shimmer.
The evidence, graded
expert consensusUS safety reviewers (2013) judged five borosilicate glasses safe as used, calcium aluminum borosilicate among them. In makeup it’s the base that metal oxide colors are coated onto. These glasses are inert and won’t significantly pass into skin. An eye shadow with 31% calcium aluminum borosilicate caused no allergy or other reactions in a repeat patch test on 105 people.Becker 2013 · International Journal of Toxicology ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
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