How do you make pulp from hard wood chips?

To make pulp from hardwood chips, first, the chips are cooked in a chemical solution, typically using sodium hydroxide or sodium sulfide, in a process called pulping. This breaks down the lignin that binds the cellulose fibers together. After cooking, the mixture is washed to remove chemicals and impurities, and then the cellulose fibers are separated and refined to create pulp. Finally, the pulp can be bleached if a whiter product is desired before it is dried and prepared for paper production.