Polyester-cotton high fastness fixing agent is washing agent for Polyester cotton blended fabric (polyester cotton sweatshirt), it is polymerized by polyamine cationic polymer. It is a new type of color-fixing agent without formaldehyde. main advantage: the water fastness level is high, which can meet the white fastness requirements, small color change, little effect on hand feeling, no solid color spots. Environmentally friendly and formaldehyde-free.