The Sulfite Process is a method used in the production of paper and pulp from wood. It involves breaking down the lignin in wood fibers using a mixture of sulfur dioxide and other chemicals. This process helps to separate the cellulose fibers, which are essential for making paper, while preserving their quality. This technique was developed in the 19th century and became popular due to its efficiency and ability to produce high-quality pulp. The sulfite pulp produced can be used in various paper products, making it an important part of the paper industry.