Applications:
Historically, the first mentions of zinc sulfide being utilized as a pigment were approximately sixty years before the everyday use of lithopone. Originally, it was thought to be appropriate for coloring rubber. In England, a patent was granted for this process. Two decades after this, the focus shifted to zinc sulfide as a suitable pigment for paint. The year 1874 witnessed the patenting of a manufacturing process for a novel white pigment composed of zinc sulfide and barium sulfate. Dubbed Charlton white or Orr’s white enamel, this began a new era for white pigments.
Analyst Insight
When used in combination with other pigments and additives, R996 can also help improve the performance of paints in terms of coverage, adhesion, and moisture resistance. This versatility makes it a valuable ingredient for paint manufacturers looking to create high-quality products that meet the needs of their customers.Manufacturer Direct Sales Barium Sulfate
The demand for transparent TiO2 has been steadily increasing as manufacturers seek to develop products with improved aesthetics and functionalityDear Purchasing Manager
We are a titanium dioxide manufacturer from China, our company has a perfect production capacity supporting, the main business is CR-930 series, anatase titanium dioxide BA01-01, CA100 series, Litho series, products with strong thickness resistance, good dispersion, high coverage. Widely used in paint, paper, rubber, coatings, tires, ceramics and other industries. Welcome your communication, negotiation and cooperation.
The company's main CR-930 series, Anatase titanium dioxide BA01-01, CA100 series, Lide powder series, has a professional management team, advanced production equipment and excellent technical advantages. The quality of our products is guaranteed and can also meet the manufacturing needs of different customers.
The factory is different from the dealer, we only provide FOB price of Tianjin port for the time being, we do not support CIF price for the time being, please understand. If necessary, the factory will provide you with quotation.
I'm Mia from Hebei Caiqing New Material Technology Co., LTD. My telephone number is +86 15694839000. My email address is sales02@cqtitaniumdioxide.com. We look forward to establishing long-term cooperative relations with your company.
Lithopone 30% is the perfect solution for partial substitution of TiO2 in fillers due to its very soft nature and hardly any shrinkage properties.
One of the key factors contributing to China's success in this sector is its well-developed infrastructure and logistics network. The country's extensive railway system, ports, and highways facilitate the transportation of raw materials and finished products efficiently, reducing costs and improving overall efficiency. Additionally, China's commitment to technological innovation has led to the development of advanced production techniques and equipment, further enhancing its competitiveness in the global market.Furthermore, the research and development activities in these factories to enhance the performance of anatase TiO2 further impact the pricing. Continuous innovation can lead to higher efficiency, which could command a premium price in the market.
2: Clarification mechanism of coagulant
Chemical coagulation is a process in which chemical agents (coagulants) are added to water treatment to make colloidal dispersion system destabilize and agglomerate. In the coagulation process, small suspended particles and colloidal impurities are aggregated into larger solid particles to separate particulate impurities from water, which is called coagulation clarification.
After adding coagulant into water, colloidal particles and other small particles can be polymerized into larger flocs through the comprehensive action of mixing, coagulation and flocculation. The whole process of coagulation and flocculation is called coagulation.
(1) Destabilization and condensation of colloids
Adding electrolyte to water can compress the electric double layer and destabilize the colloid. The main mechanism is that the electric double layer of colloidal particles in water is compressed or neutralized by adding aluminum salt or iron salt coagulant. The coagulant and raw water are mixed rapidly and evenly, and a series of chemical reactions are produced to destabilize. This process takes a short time, generally about 1 min. Some cationic polymers can also play a role in the destabilization and condensation of colloids in water. These polymers have a long chain structure and positive charge in water. Their destabilization and condensation of colloids in water is due to the interaction of van der Waals force adsorption and electrostatic attraction.
(2) Flocculation and formation of floc (alum)
The particle size of the initial flocculate formed by colloid destabilization and coagulation in water is generally more than 1 m. at this time, Brownian motion can no longer push them to collide and form larger particles. In order to make the initial flocs collide with each other to form large flocs, it is necessary to input additional energy into the water to produce a velocity gradient. Sometimes it is necessary to add organic polymer flocculant into water, and the adsorption bridging effect of long chain molecules of flocculant is used to improve the probability of collision and adhesion. Flocculation efficiency usually increases with the increase of flocculate concentration and flocculation time.
Compared with polyaluminum chloride, polyaluminum chloride has the advantages of high density, fast settling speed and wide pH adaptability; the coagulation effect is less affected by temperature than that of polyaluminum sulfate; however, when adding ferric salt, it should be noted that when the equipment is not in normal operation, the iron ions will make the effluent color, and may pollute the subsequent desalination equipment.
Prof. Maged Younes, Chair of EFSA’s expert Panel on Food Additives and Flavourings (FAF), wrote of the decision: “Taking into account all available scientific studies and data, the Panel concluded that titanium dioxide can no longer be considered safe as a food additive. A critical element in reaching this conclusion is that we could not exclude genotoxicity concerns after consumption of titanium dioxide particles. After oral ingestion, the absorption of titanium dioxide particles is low, however they can accumulate in the body.”
In a 2019 study published in the journal Nanotoxicology, researchers recreated the first phase of digestion in mice and fed them titanium dioxide, then examined whether accumulation occurred in the organs. Researchers wrote: “Significant accumulation of titanium was observed in the liver and intestine of E171-fed mice; in the latter a threefold increase in the number of TiO2 particles was also measured. Titanium accumulation in the liver was associated with necroinflammatory foci containing tissue monocytes/macrophages. Three days after the last dose, increased superoxide production and inflammation were observed in the stomach and intestine. Overall, [this] indicates that the risk for human health associated with dietary exposure to E171 needs to be carefully considered.”
From studies deemed relevant, the experts found that titanium dioxide as a food additive is poorly absorbed by the gastrointestinal tract of mice and rats, with no adverse effects observed in short-term studies in rodents receiving titanium dioxide in their diets. No observed adverse effect levels (NOAELs) of 15,000 milligrams per kilogram of bodyweight (mg/kg BW) per day and 5,000 mg/kg BW per day—the highest doses tested—were established for mice and rats, respectively.
When choosing lithopone, you must choose a good brand and pay attention to its production date. Some people just don’t pay attention to this aspect and often pursue cheap prices. As a result, they buy products that are close to their expiration date and have not been stored for long. It is no longer usable. This is very important.