Pulp can be categorized by processing methods into mechanical pulp, chemical pulp, and chemical-mechanical pulp; it can also be classified by the fiber raw material used, such as wood pulp, straw pulp, hemp pulp, reed pulp, sugarcane pulp, bamboo pulp, and rag pulp, among others. Additionally, it can be further divided by purity into refined pulp, bleached pulp, unbleached pulp, high-yield pulp, semi-chemical pulp, and more.