Paper mills can be fully integrated mills or nonintegrated mills. Integrated mills consist of a pulp mill and a paper mill on the same site. Such mills receive logs or wood chips and produce paper.
The modern paper mill uses large amounts of energy, water, and wood pulp in an efficient and complex series of processes, and control technology to produce a sheet of paper that can be used in diverse ways. Modern paper machines can be 500 feet (150 m) in length, produce a sheet 400 inches (10 m) wide, and operate at speeds of more than 60 miles per hour (97 km/h). The two main suppliers of paper machines are Metso and Voith.