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The overseas demand for Chinese TiO2 rose up by about 17% in 2016, which enabled an export increase of the manufacturers in China. As a fact, Chinese TiO2 is highly demanded in overseas markets, due to the comparable small price of the suppliers. The export of TiO2 is responsible for about one-third of the total output in China.

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 Lithopone B301, Lithopone B311 powder itself may vary in shade over time, ranging from pure white all the way to grey or even black. To suppress this effect, a dopant might be used, like 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.

Neutral