This article is a red powder, the color and luster is fresher and gorgeous,the acid-proof is better,the heat-proof is worse and with the alkalescence worse.This product is brighter red in the oil of vitriol, diluteion in hydrogen oxideze.It blongs to the ordinary chemical product,without virulence,free from pollution. Application: it is mainly used in inks, papers,paints,cosmetics,etc.