china nanoscale titanium dioxide

Anatase, on the other hand, is a titanium dioxide form that exhibits higher photocatalytic activity and lower photocorrosion compared to rutile. It is commonly used in sunscreens, cosmetics, and water treatment due to its ability to absorb ultraviolet light and protect skin from harmful UV radiation. Anatase titanium dioxide is typically produced by the chloride process, which involves the chlorination of titanium ore to produce titanium tetrachloride Anatase titanium dioxide is typically produced by the chloride process, which involves the chlorination of titanium ore to produce titanium tetrachloride Anatase titanium dioxide is typically produced by the chloride process, which involves the chlorination of titanium ore to produce titanium tetrachloride Anatase titanium dioxide is typically produced by the chloride process, which involves the chlorination of titanium ore to produce titanium tetrachloriderutile and anatase titanium dioxide factory. The resulting gas is then reacted with oxygen to produce anatase titanium dioxide particles, which are collected and processed into the final product.

...

Although barium sulfate is almost completely inert, zinc sulfide degrades upon exposure to UV light, leading to darkening of the pigment. The severity of this UV reaction is dependent on a combination of two factors; how much zinc sulfide makes up the pigments formulation, and its total accumulated UV exposure. Depending on these factors the pigment itself can vary in shade over time, ranging from pure white all the way to grey or even black. To suppress this effect, a dopant may be used, such as a small amount of cobalt salts, which would be added to the formulation. This process creates cobalt-doped zinc sulfide. The cobalt salts help to stabilize zinc sulfide so it will not have as severe a reaction to UV exposure.

...