Talc is a hydrous silicate minerals with layered structure, chemical composition of magnesium oxide (MgO) 31.88% (silica) SiO2 63.37%, H2O, 4.75%, and often containing a small amount of Fe, Al and other elements commonly used talc to deployment of putty as a filler. his main ingredient is magnesium oxide and silicon oxide to the ???combined??? form of inorganic compounds, which also contains trace