ecause of the non-toxic, non-bleeding, low cost and because different colors can be formed features of the iron oxide pigments. It is widely used in coatings, paints and inks. Applied to the paint manufactureing pigments and iron yellow, iron palm, iron red, mica iron oxide, tranparent iron yellow, tran***rent iron red, and most of the translucent, enormous quantity is iron red, which is the most important.