Groundwood

Another term for a type of paper pulp produced by grinding wooden logs against a rotating stone (also commonly referred to as mechanical pulp).

Pulping is done to separate cellulose fibres from other impurities within the raw material. The more cellulose a paper consists of, the better the quality will be, so the best pulps are those that consists of mostly cellulose and little to no other materials.

Groundwood pulp has high levels of impurities such as lignin (in contrast to pulp produced using chemical methods), and so it is often used for lower-quality paper.

This type of paper is commonly found in newspapers, telephone directories, mass-market trade novels, and other temporary printing jobs.