Paper chemicals refer to the general term for various chemical agents and additives used in the papermaking process. It covers a wide range of contents, including four categories: pulping chemicals (such as cooking aids, deinking agents, etc.), papermaking chemicals (such as sizing agents, wet strength agents, etc.), paper processing chemicals (such as fungicides, defoamers, coating agents), and pollution control chemicals. Its purpose is to improve the quality and production efficiency of paper, improve operating conditions, reduce manufacturing costs, increase economic benefits, and develop new paper varieties.