out before during or immediately after the destructuring process but before completion of the refining process the enzyme treatment is carried out on u201c destructured wood chips u201d u201c destructured wood chips u201d refers to a woody material used as the raw material of the mechanical pulp which has been subjected to at least one mechanical destructuring process step the term destructured wood chips therefore encompasses e g chips of various sizes compressed and uncompressed destructured wood chips matchsticks and fiber bundles preferably the enzyme treatment is carried out on destructured wood chips more preferably the enzyme solution is carried out on destructured wood chips during decompression of the chips in another embodiment the enzyme solution can be added during the chip handling prior to destructuring as an example the enzyme solution can be added after chip washing at the chip bin in this embodiment the chips are treated and directed to a destructuring device before compression decompression prior to a primary refiner the pulp is then refined to desired specifications before being returned to the papermaking system stream the introduction of the enzyme solution can be made at one or more points and the introduction can be continuous semi continuous batch or combinations thereof according to various embodiments the chip to liquor ratio can be about 1 to 20 1 to 10 or 1 to 5 various ranges of components such as enzymatic activities times pressures and values of such are described herein it is to be understood that additional combinations of such ranges and values are also disclosed by such descriptions as a general example a range of from.