Abstract: This experiment focuses on the preparation of cream cosmetics and innovatively develops gradient science popularization activities tailored to audiences with varying knowledge backgrounds. Utilizing original videos, informative flyers, PPT presentations, and on-site guidance, the experiment elucidates the principles of emulsification and related cosmetic knowledge to primary and secondary school students, as well as the general public, while introducing the cosmetic preparation process. For programs targeting college students, the complexity and depth of the experiments are increased, allowing students to independently conduct the preparation and performance characterization of cosmetics. This popular science experiment has garnered unanimous praise in practice and possesses significant practical relevance and promotional value.

Key words: Cosmetics, Preparation, Popularization of science, Emulsification, Gradient