China Powder Network reported on July 9 that the main component of talc is talc-hydrated magnesium silicate. Talc belongs to the monoclinic crystal system, and the crystals are pseudo-hexagonal or rhombus-shaped flakes, which are occasionally seen. Usually in dense block, leaf, radial and fibrous aggregates. Colorless, transparent or white, but due to a small amount of impurities, it appears light green, light yellow, light brown or even light red; the cleavage surface shows a pearly luster. Hardness 1, specific gravity 2.7~2.8. Talc is a white or off-white, fine, non-gritty powder that feels greasy to the touch. Odorless and tasteless, this product is insoluble in water, dilute mineral acid or dilute alkali hydroxide solution. Special properties of talc powder: In process