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Production[edit]
Why does the exposure route matter, and what's the risk?
Lithopone is a white pigment (PW5) co-precipitated from solutions of zinc and barium salts according to the following reaction:
Stability and darkening[edit]
Lithopone is an inorganic white pigment, obtained from co-precipitation of Zinc sulfide (ZnS) and Barium sulfate (BaSO4). As a white pigment, it acts as a cost-effective alternative for TiO2. Some of the properties of Lithopone include high brightness and performance under UV exposure. Lithopone requires less wetting agent to achieve optimum wetting of its surface. It is commercially graded on the basis of amount of ZnS. Its grades include 28%, 30%, and 60% ZnS. As a comparatively inexpensive white pigment, Lithopone is presently used in various paint formulations, road marking paints, jointing compounds, and putties.


BaS+ZnSO4→ZnS·BaSO4
Titanium alloy is widely used as a biomaterial due to its superior biocompatibility, mechanical properties close to human bones, and enhanced corrosion resistance. These properties have made the alloys suitable for use in a wide spectrum of biomedical applications including artificial bones, artificial joints, dental roots, and medical devices. The excellent performance of titanium alloy is mainly due to the oxide film as shown in Figure 1 [1]. The functional composition of the oxide film is mainly titanium dioxide (TiO2). Titanium dioxide has good biocompatibility, stable chemical property, and low solubility in water, which prevents substrate metal ions from dissolution. Furthermore, it also improves the wear and fatigue resistance of implants in the human body.
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References[edit]
- One of the key factors to consider when choosing a TiO2 supplier is the quality of the product they offer. High-quality TiO2 should have excellent brightness, opacity, and dispersion properties, as these characteristics directly impact the final appearance and functionality of the end product. An excellent white TiO2 supplier will have a reputation for consistently producing top-quality products that meet or exceed industry standards.
- Thomas B. Brill, Light Its Interaction with Art and Antiquities, Plenum Press, New York City, 1980
- TiO2 is also used in paints and coatings due to its excellent whiteness, opacity, and weather resistance. It provides a durable and long-lasting finish that protects the underlying surface from environmental factors such as UV radiation, moisture, and chemicals.
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