The paper pulp is prepared from a chemical liquid containing a mixture of sodium hydroxide and sodium sulfide as a main raw material (a variety of wood, grass, and inferior quality waste materials).
Sulphate wood pulp is named after its brown color and high paper strength.
Due to its high strength, high yield, and good heat resistance, the slurry is adaptable to a wide range of raw materials. The method for recovering cooking waste liquids has matured and has become the world's major pulp type.
Kraft pulp is widely used. This color paste is used in the production of industrial technical papers such as packaging paper, paper bag paper, cardboard and electrical products. The bleached pulp is used to make high-grade cultural papers. The refined pulp can be used as dissolving pulp.