Method for manufacturing fibrous web, particularly paper-, packaging paper- or cardboard web in paper- or board machine, involves merging layers in headbox and positions in sheet-forming unit to fibrous web

摘要

The method involves merging two or multiple layers in a headbox (2,3,4) and two or multiple positions in a sheet-forming unit (10) to a fibrous web (1). The layers or the positions are primarily formed from fibrous material. The residue material is added to the fibrous material of a cover layer or cover position by a discoloration of the wood-free paper. The whiteness of the coated fibrous web is measured after International Organization for Standardization 2470with a light source.