Coronavirus-related shutdowns in the first half of the quarter prompted forcible measures at several small-scale ilmenite factories in China and India, subsequently exacerbating the Titanium supply problem. The chemical's tight supply condition was extended until the end of the quarter, as few participants were heard holding cargoes in expectation of an exceptional surge in its seasonal demand.

“Lithopone Market by Application: Global Opportunity Analysis and Industry Forecast, 2020-2027”

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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.