Silicone oil is a colorless and odorless transparent liquid. It is one of the most toxic products in cosmetics. It is non-irritating, non-allergenic, non-stinging, and neutral to human skin. It is an excellent material for modern cosmetics. Silicone oil has a large distance between molecules, and its molecular force is much weaker than that of hydrocarbons. It has low surface tension and high surface activity. Therefore, silicone oil has excellent defoaming and anti-foaming properties and good film-forming properties. It is easy to form a very thin film, which is used in cosmetics and applied to the human body skin, just like a very thin gauze mask, and achieves protection. Skin function. Silicone oil is hydrophobic and insoluble in water. Silicone oil has excellent isolation and lubricity from other substances, and has the ability to block moisture without affecting air permeability. It has a high degree of gloss and makes the skin brighter. Moreover, silicone oil has excellent compatibility with other cosmetic raw materials.