How to recruit professional calcium carbonate powder chemists?

Age, education background and gender can be determined according to the requirements, mainly in the column of requirements: the requirements are analysis major in the Department of Chemical Engineering or related major, or working experience in calcium carbonate or silicate units (or working in a powder factory). Generally, calcium carbonate will be tested for whiteness, particle size, moisture, sieve residue, calcium carbonate content, magnesium carbonate content, acid insoluble matter, iron content and other items.