Pulp is formed from cellulosic fibers and different plant materials. Some synthetic materials can be used to provide special qualities to the finished product. Paper is formed from wood fibers, but rags, flax, cotton linters, and pulp (sugar cane residues) are also utilized in some papers. Used paper is additionally recycled, and after purification and sometimes deinking, it is often blended with virgin fibers and reformed once more into paper. The paper manufactured is widely used for printing, writing, packaging and many other functions.