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- The most common type of titanium dioxide is known as rutile. Rutile titanium dioxide is known for its excellent durability and weather resistance, making it ideal for outdoor applications such as paints and coatings. It also has a high refractive index, which means it is very effective at scattering and reflecting light, making it a popular choice for use in cosmetics and sunscreens.
In food, titanium dioxide is often used as an artificial color additive. Tasha Stoiber, senior scientist at the consumer health nonprofit Environmental Working Group, says titanium dioxide can generally be thought of as a paint primer – it often goes on a hard-shelled candy like Skittles before the color is added to give it a uniform shine.