Class Codes & Rates:

 Code 4207 is applied to operations engaged in the manufacture of pulp utilizing a chemical process. Debarked logs and wood chips, wastepaper, rags, textile mill wastes, and various chemicals, depending on the specific process to be utilized, are received from others. However, debarking and chipping mill operations are included within the scope of this classification if the operations are performed at the pulp mill. The chips are fed, usually by gravity, to digesters, where they are penetrated by the particular chemical. Kraft (Sulphate) is widely used because of its ability to process many types of wood.