wholesale colloidal silicon dioxide

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Looking ahead to 2023, titanium dioxide will play a key role in various industries. The growth potential of this chemical is huge, and companies like Hebei Caiqing Material Technology Co., Ltd. are well positioned to meet the changing demands of the market. With its individual customization services and dedication to research and development, the company is well-positioned to meet the growing demand and contribute to the advancement of titanium dioxide applications worldwide. Whether in coatings or plastics, titanium dioxide brings innovation, protection and improved product performance to a wide range of customers around the world.

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This article discusses the discovery of phosphorescent lithopone on watercolor drawings by American artist John La Farge dated between 1890 and 1905 and the history of lithopone in the pigment industry in the late 19th and early 20th centuries. Despite having many desirable qualities for use in white watercolor or oil paints, the development of lithopone as an artists' pigment was hampered by its tendency to darken in sunlight. Its availability to, and adoption by, artists remain unclear, as colormen's trade catalogs were generally not explicit in describing white pigments as containing lithopone. Further, lithopone may be mistaken for lead white during visual examination and its short-lived phosphorescence can be easily missed by the uninformed observer. Phosphorescent lithopone has been documented on only one other work-to-date: a watercolor by Van Gogh. In addition to the history of lithopone's manufacture, the article details the mechanism for its phosphorescence and its identification aided by Raman spectroscopy and spectrofluorimetry.

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