Factors affecting the whiteness of kaolin
Today, in the industrial sector, kaolin is widely used in dozens of industries such as paper, ceramics, rubber, chemicals, coatings, pharmaceuticals and national defense. The whiteness and brightness of kaolin will directly affect its quality, what are the factors that affect the whiteness of kaolin? Definition of whiteness : Whiteness is the degree to which the surface of a substance is white, expressed as a percentage of the white content. The whiteness is 90%, which is equivalent to 90% of the reflectivity of the standard sample. This index is an important reference quality indicator for papermaking, paint, and industry. Factors affecting kaolin whiteness : Usually, the content of vanadium, chromium, copper, manganese etc in kaolin is small, and has little effect on whiteness. The mineral composition and content of iron and titanium are the main factors affecting the whiteness of kaolin. The forms of iron ore include pyrite, limonite, hematite, rutile, chlorite a...