lithopone red pigments quotes factory

...

In conclusion, the price per kilogram of titanium dioxide varies depending on several factors, including the production method, quality, purity, and demand. High-quality titanium dioxide produced through the chloride process tends to be more expensive than lower-quality titanium dioxide produced through the sulfate process. However, the sulfate process is more commonly used due to its lower cost and higher yield. As an essential pigment in various industries, titanium dioxide continues to play a crucial role in our daily lives.

...

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.

...