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It is a national high-tech enterprise, a national top 500 chemical enterprise, and the largest titanium dioxide exporter in China. The main products are TiO2, zirconium products, sulfuric acid and sulfate. Among them, titanium dioxide has reached 120,000 tons, and its export volume has ranked first in the country for three consecutive years. The annual production capacity of the main titanium dioxide is 600,000 tons, ranking first in Asia and fourth in the world.

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The author thanks Marco Leona, Scientist-in-Charge of the Department of Scientific Research at the Metropolitan Museum of Art for conducting fluorescence spectrometry on Wheel of Fortune and a valuable discussion of the research, as well as Silvia Centeno, Research Scientist at the Metropolitan Museum of Art, who performed Raman analysis on the watercolors and also contributed her insight. The phenomenon of the phosphorescing lithopone was originally discovered during the author's fellowship in the Sherman Fairchild Center for the Conservation of Works on Paper, funded by the Andrew W. Mellon Foundation. The author thanks all her colleagues for their ideas and support during the research of this paper, and special thanks to Rachel Mustalish for her assistance in editing this work.

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Environmental concerns have prompted the Chinese government to enforce strict regulations on the titanium dioxide industry. Manufacturers are compelled to adopt cleaner production methods and waste management strategies to minimize the environmental footprint. Additionally, there is a growing trend towards the use of recycled titanium dioxide, reducing the reliance on raw materials and further contributing to sustainability efforts Additionally, there is a growing trend towards the use of recycled titanium dioxide, reducing the reliance on raw materials and further contributing to sustainability efforts Additionally, there is a growing trend towards the use of recycled titanium dioxide, reducing the reliance on raw materials and further contributing to sustainability efforts Additionally, there is a growing trend towards the use of recycled titanium dioxide, reducing the reliance on raw materials and further contributing to sustainability effortschina 6618 titanium dioxide.

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