1690 is a new type of retention aid for paper making. Adding this product can reduce the phenomenon of powder and hair loss.Improve filler, fine fiber, sizing agent retention rate, so as to improve the paper ash, opacity, sizing, paper smoothness, increase strength;At the same time, it can reduce the concentration of off-net white water, improve the retention rate, save pulp consumption, improve filtration water, reduce production cost and increase economic benefits.This product has no pollution to the environment and can meet the requirements of green environmental protection.