Colorado Cosmetology Written Practice Exam

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What is the main ingredient in base cream?

Keratin
Petroleum
Silica
Zinc

The correct answer is: Petroleum

Base cream typically consists of at least two main ingredients - water and an oil, such as petroleum. Keratin, silica, and zinc can also be ingredients in base cream, however, they are not the main ingredient. Keratin is a protein often found in hair products, silica is a mineral that can provide skin benefits, and zinc is a mineral often used for its antimicrobial properties. Base cream commonly utilizes petroleum as the main ingredient due to its moisturizing properties.