The manufacturing process for facial foundation typically begins with raw material pretreatment. The oil phase consists of ingredients such as silicone oils, plant-based oils, or synthetic esters, which serve to impart a smooth texture and ensure seamless adherence to the skin. The aqueous phase comprises deionized water, humectants (such as glycerin and propylene glycol), and various functional ingredients. Powder components-such as titanium dioxide and iron oxides-undergo a preliminary wetting treatment to prevent agglomeration and enhance coverage efficacy.
The process then proceeds to the emulsification and dispersion stage. After the oil and aqueous phases are separately processed under heated conditions, they are blended using high-shear emulsification equipment to form a stable emulsion structure. Powder ingredients are gradually introduced during this stage, and the mixture undergoes further particle refinement via homogenization or three-roll milling; this ensures the foundation possesses a fine, non-caking texture while simultaneously improving the uniformity of its coverage.
The final stage involves cooling and formulation adjustment. As the system cools down, fragrances, preservatives, and specific active ingredients-such as niacinamide or hyaluronic acid-are added to ensure product stability and enhance skincare benefits. Following homogenization, the product is filled into containers and subjected to rigorous stability testing (including heat resistance, cold resistance, and centrifugation) to verify that it remains free from phase separation, oil exudation, or clumping under various environmental conditions, thereby yielding the final, ready-to-use foundation product.