Which colors are classified as non-certified in esthetics?

In the context of esthetics and cosmetic formulations, non-certified colors refer to specific colorants that are not subject to the rigorous testing and approval process required for certified colors. Zinc oxide and iron oxide are classified as non-certified because they naturally occur and are commonly used in products like sunscreens and foundation for their protective and pigment properties. They are considered safe and effective without needing certification from regulatory bodies.

Certified colors, on the other hand, typically include synthetic dyes and pigments that are explicitly approved for cosmetic use after thorough testing. The other color options listed include shades obtained from synthetic sources or combinations that may not have the same status in terms of certification. Therefore, identifying zinc oxide and iron oxide as non-certified colors highlights an understanding of the classification within cosmetic regulations, separating naturally derived components from those that undergo the certification process.