polycondensation polyamines, is a polyene polyamine and guanidine compound with hydrochloric acid, urea in a de helium reaction of water-soluble resins generally do not contain free formaldehyde, was cationic, which has a network structure but also with the anionic dyes generate macromolecular compounds can improve wet fastness, dosage and fixing conditions basically the same fixative Y. Such fixing agent is one of the varieties of rapid development, mainly used in reactive dyes and direct dyes fixing.