rutile titanium dioxide pigment

CL 77891 offers a range of titanium dioxide products to meet the diverse needs of their clients. Whether you are looking for a general-purpose pigment for paints and coatings or a specialized grade for the cosmetics industry, CL 77891 has the expertise and resources to provide you with the right product for your specific application. Their products are meticulously tested for quality and consistency, ensuring that you receive a reliable and high-performance pigment every time.

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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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