The reaction liquid is filtered through plate and frame pressure to obtain lithopone in the form of a filter cake with a moisture content of no more than 45%. It is then roasted in a drying furnace to change the crystal form of lithopone, and is then pickled with sulfuric acid at a temperature of 80°C. Finally, it is washed with water, reinforced with colorants, filtered, dried and ground into powder.
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Each batch undergoes rigorous testing to ensure consistent particle size distribution, dissolution rate, and overall performance Each batch undergoes rigorous testing to ensure consistent particle size distribution, dissolution rate, and overall performance
