Kraft pulping
Kraft pulping is a chemical process used to convert wood into pulp for making paper. It involves cooking wood chips in a mixture of sodium hydroxide and sodium sulfide, which breaks down the lignin that binds the cellulose fibers together. This method produces stronger pulp compared to other processes, making it ideal for high-quality paper products.
The name "Kraft" comes from the German word for "strength," reflecting the durability of the pulp produced. This process also allows for the recovery of chemicals used, making it more environmentally friendly. The resulting pulp can be bleached or used directly in various paper products.