titanium dioxide used for white pigments

Résumé–Cet article traite de la découverte de lithopone phosphorescent sur des dessins à l'aquarelle, datés entre 1890 et 1905, de l'artiste Américain John La Farge et de l'histoire du lithopone dans l'industrie des pigments à la fin du 19e et au début du 20e siècle. Malgré de nombreuses qualités souhaitables pour une utilisation en tant que blanc dans les aquarelles et les peintures à l'huile, le développement du lithopone comme pigment pour artistes a été compliqué de par sa tendance à noircir lorsqu'il est exposé au soleil. Sa disponibilité et son usage par les artistes demeurent incertains parce que les catalogues des marchands de couleurs n'étaient généralement pas explicites à indiquer si les pigments blancs contenaient du lithopone. De plus, lors d'un examen visuel, le lithopone peut être confondu avec le blanc de plomb et sa phosphorescence de courte durée peut facilement être ignorée par l'observateur non averti. À ce jour, le lithopone phosphorescent a seulement été documenté sur une autre œuvre: une aquarelle de Van Gogh. En plus de l'histoire de la fabrication du lithopone, cet article décrit le mécanisme de sa phosphorescence et son identification à l'aide de la spectroscopie Raman et de la spectrofluorimétrie.

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titanium dioxide used for white pigments2025-08-16 14:29
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One of the key reasons why TiO2 is favored by paper suppliers is its excellent light-scattering properties. When added to paper, TiO2 particles scatter light, making the paper appear brighter and more opaque. This is crucial for producing high-quality papers that are aesthetically pleasing and easy to read. TiO2 also helps to enhance the whiteness of paper, giving it a clean and crisp appearance that is highly desirable in the paper industry.

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titanium dioxide used for white pigments2025-08-16 13:16
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Titanium dioxide, often abbreviated as TiO2, is a white pigment widely used in the production of paints, plastics, paper, and other products. It's also utilized in photocatalytic applications due to its semiconducting properties. Titanium dioxide coatings are particularly valued for their ability to reflect ultraviolet light, making them useful in sunscreens and cosmetics, as well as in architectural materials where UV protection is needed.

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titanium dioxide used for white pigments2025-08-16 12:51
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titanium dioxide used for white pigments2025-08-16 12:30
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