COMPOSITE PAPERBOARDS AND METHOD OF MAKING COMPOSITE PAPERBOARDS

摘要

A laminated composite sheet (10) is produced whereby it may be unnecessary to add a pigment to the adhesive layer (12) or a coating to the publication grade paper (14) adhesively attached to an unbleached cellulosic substrate (5). A laminated structure may be further produced wherein the base board is comprised of at least two plies one of which is comprised of bleached cellulosic fibers (3) and at least one other ply of unbleached fibers (5).