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1. 296 to 1.357 g/cm3 is obtained. The reaction solution is subjected to pressure filtration through a plate frame to obtain a cake-like lithopone powder having a water content of not more than 45%. The mixture is calcined in a dry roaster to change the crystal form of the lithopone, and then acid-washed with sulfuric acid at a temperature of 80 °C. Finally, it is washed with water, reinforced with coloring agent, pressure filtration, drying and milling.

CAS NO. :

The Colour of Barium Sulphate and Its Suppliers

The committee could not finalize the assessment of some other flavoring agents, requiring further information. JECFA highlighted the importance of receiving complete data submissions from the sponsors for conducting the safety evaluation.

CAS NO. :

Lithopone or sulphide of zinc white has been in general use for twenty years or more in many industries where a white pigment of considerable body or hiding power is required that is not subject to change like lead carbonate and has not the brittle character of zinc oxide, besides being sold at a lower figure than either of these. Nevertheless it is still comparatively new to the general painting trade. Because of our tariff protection its manufacture in this country has made great progress. Yet in spite of this and the duty imposed on it, the imports are still in excess of the quantity manufactured here. A short history of its origin will no doubt prove of interest to our readers.

The natural barite containing more than 95% of barium sulfate is mixed with anthracite in a ratio of 3:1 (mass), and is pulverized to a diameter of about 2 cm or less to enter a reduction furnace, and the front stage of the furnace temperature is controlled by 1000 to 1200 ° C, and the latter stage is 500 to 600 ° C, the reduction furnace rotates at a speed of 80s per revolution, the reaction conversion rate is 80% to 90%, the obtained barium sulfide enters the leaching device, the control temperature is above 65 ° C, and the content of barium sulfide is 701%, and then enters the clarification. The barrel is clarified and then added with zinc sulfate to control the zinc sulfate content to be greater than 28%, and the pH is 8-9, and a mixture of barium sulfate and zinc sulfide having a density of

Tint reducing power, compared with standard samples

Lithopone is an inorganic white pigment, obtained from co-precipitation of Zinc sulfide (ZnS) and Barium sulfate (BaSO4). Titanium Dioxide (TiO2) has replaced Lithopone as a white pigment in majority applications as TiO2 is more durable. However, it is much cheaper than TiO2 and has advantages such as low binder requirement and good dispensability. As a white pigment, it can improve the substrate's weather resistance, and improve the fungicidal properties of paint formulations. Some of the major applications of Lithopone include manufacturing of paint pigments, plastic & rubber products, paper, printing inks, cosmetics, and leather & linoleum products. It is commercially available under names such as pigment white 5, Barium zinc sulfate sulfide, Becton White, C.I. 77115, Charlton White, Enamel White, and Zincolith. On the basis of content of ZnS, Lithopone is available at 28%-30% Lithopone and 60% Lithopone.

Barium sulphate is typically described as a white, odorless powder. This white coloration is due to its crystalline structure and the arrangement of Ba^2+ and SO₄^2− ions within the compound. The brightness and consistency of this white powder are crucial for its use in various applications. For instance, in the pharmaceutical industry, barium sulphate is used as a radiopaque agent in X-ray imaging of the gastrointestinal tract. In this context, its purity and the absence of color impurities are vital for ensuring accurate imaging results.

Although barium sulfate is almost completely inert, zinc sulfide degrades upon exposure to UV light, leading to darkening of the pigment. The severity of this UV reaction is dependent on a combination of two factors; how much zinc sulfide makes up the pigments formulation, and its total accumulated UV exposure. Depending on these factors Lithopone B301, Lithopone B311 powder itself may vary in shade over time, ranging from pure white all the way to grey or even black. To suppress this effect, a dopant might be used, like small amount of cobalt salts, which would be added to the formulation. This process creates cobalt-doped zinc sulfide. The cobalt salts help to stabilize zinc sulfide so it will not have as severe a reaction to UV exposure.

Yesterday, the domestic rutile type, anatase titanium dioxide new single price stability, the market overall transaction focus moved up. Titanium dioxide factory work normally, more delivery of early orders, less spot supply; And buyers still have inventory digestion, the current mentality turned to wait-and-see. The volume of new orders in the market is limited.The key factors affecting the current market price change1. Inventory: the mainstream manufacturer inventory is low, there are still early delivery orders, it is expected that today's spot inventory is still low, and the mainstream factory spot is tight.

Overall, TiO2 powder suppliers play a vital role in ensuring that industries have access to the high-quality TiO2 powder they need for their various applications. By sourcing and supplying this essential raw material, TiO2 powder suppliers help to drive innovation and growth in industries around the world.

Oil absorption, g/ 100g

Titanium dioxide morning tips
1 Rutile type titanium dioxide
As of the close of last Friday, the average price of the sulfuric acid rutile titanium dioxide market assessment is 15683 yuan/ton, the domestic market mainstream negotiation reference 15200-16200 yuan/ton, the mainstream factory in hand orders are okay, coupled with the upstream raw materials expected to be strong, the new single offer to maintain a strong state, the market low price supply reduction.
According to the feedback of manufacturers, the recent mainstream factory new single price, the overall market transaction focus has moved up. On the demand side, the terminal in August is still the off-season, many downstream last month to replenish just need inventory, the current batch purchase intention is limited, the market turnover is low. From the supply side, the mainstream manufacturers still have production reduction or maintenance adjustment inventory in the off-season, and the supply side output is low. Some plastics and papermaking related downstream feedback some models have high prices. Recent titanium dioxide raw material price upward support has been enhanced, comprehensive market factors, the current titanium dioxide market into the stable price state after rising.
2 Anatase titanium dioxide
As of the close of last Friday, the average price of the domestic anatene titanium dioxide market was estimated at 13,000 yuan/ton, and the mainstream reference range for negotiation was mostly centered on 12,500-13,500 yuan/ton. The actual direct selling link price is still more reference in 13,000 yuan/ton. Some lower-priced producers offer even lower prices. On the demand side, because the current price is still relatively low, some downstream bargain purchasing. On the supply side, some manufacturers operate at low load or have maintenance plans. The comprehensive market supply and demand situation and the trend of raw material prices rise, the current market actual transaction price is stable and strong, some manufacturers of titanium diox

Stability and darkening:

In conclusion, lithopone is an important white pigment that is used in a variety of industries around the world. With 30% of the world's lithopone factories located in China, the country has become a major player in the global lithopone market. Chinese manufacturers are able to produce high-quality lithopone at a competitive price, making it an attractive option for companies looking to reduce their production costs. Despite the challenges of production, China's lithium industry continues to thrive and innovate, ensuring a stable and reliable supply of this essential pigment for years to come.