Biochemical Pulping - In a recent report it was shown that a treatment of aspen chips (aspen is a wood; wood is received by pulp mills in two forms, logs or chips, the latter being more popular) with Phanerochaete chrysosporium before craft pulping (sulphate process) gives improved tensile strength (resistance to rupture by a force parallel to sheet) and burst strength (resistance to rupture by force perpendicular to sheet), but decreased tear strength (resistance to elongation under transverse shear), brightness and yield.

Brightness may be improved later by bleaching. More research and experimentation is needed before biochemical pulping becomes a reality and used in paper industry.