is titanium dioxide natural or synthetic

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.

...

One of the most well-known uses of titanium dioxide powder is in the production of paints and coatings. Titanium dioxide is a popular pigment due to its excellent opacity, brightness, and durability. It is commonly used in architectural paints, automotive coatings, and other applications where colorfastness and weather resistance are important. Suppliers who can provide a consistent, high-quality titanium dioxide powder are essential for the paint and coating industry to produce top-notch products.

...

One of the key areas of focus for TiO2 technology manufacturers is environmental sustainability. With increasing concerns about climate change and environmental impact, TiO2 manufacturers are exploring ways to reduce their carbon footprint and minimize waste in their production processes. By implementing new technologies, such as recycling and waste reduction initiatives, TiO2 manufacturers are able to produce TiO2 products in a more eco-friendly manner.

...