jual titanium dioxide suppliers

The demand for TiO2 has been steadily increasing over the years, driven by the growth of the paint and coatings industry, as well as the expansion of its use in other applications such as electronics and cosmetics. In addition, the increasing awareness of the environmental impact of traditional production methods has led to a growing interest in more sustainable production techniques, such as the use of bio-based feedstocks or the implementation of closed-loop processes.

...

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.

...
{随机栏目} 2025-08-14 16:36 2811