Fumed silica used in cosmetics can be divided into hydrophilic and hydrophobic types, with the choice depending on the product's formulation and the specific properties required. Here are the main features of both:

Hydrophilic fumed silica: Hydrophilic fumed silica is highly hydrophilic and can absorb moisture, making it easier for the product to distribute evenly on the skin. This type of fumed silica is often used in water-based cosmetics, such as water-emulsified foundation, water-emulsified isolation cream, etc. It helps improve the moisturizing properties of the product and makes the makeup look more natural.

Hydrophobic fumed silica: Hydrophobic fumed silica has strong hydrophobicity and can absorb oil, control shine, and make makeup last longer. This type of fumed silica is often used in oil-control cosmetics, such as loose powder, oil-control isolation cream, etc. It helps control oil secretion on the skin to a certain extent and keeps the makeup looking fresh.

In actual formulations, cosmetics manufacturers may choose the appropriate type of fumed silica based on the properties and target effects of the product, or they may use a mixture to achieve multiple effects. Therefore, when purchasing cosmetics, you can check the product ingredient list to understand the type of fumed silica used in it to better meet your personal cosmetic needs.