Foundation: formulation secrets, pigments, and regulatory compliance. Foundation is the primary cosmetic makeup product applied to facial skin, formulated as a fluid emulsion, cream, or pressed compact powder. Designed to unify skin tone, camouflage imperfections, and enhance radiance, its daily application over extensive facial surface area makes it one of the most intricate cosmetics to formulate and evaluate. In Europe, placing a foundation on the market mandates strict compliance with Regulation (EC) No 1223/2009. From pigment purity testing to toxicological evaluation, explore our comprehensive guide.