There are several layers in corrugated boards. Liner boards are the thin facings that you see on the outside and inside of a corrugated board and f luted mediums are the wavy-looking inner arches that are attached in between the liner boards with adhesive.
The basis weight of corrugated board is measured in lbs/1000 sq. ft. and it directly impacts paper strength. In other words, the higher the basis weight of the corrugated paper, the stronger it is.
Basis weight is tested by separating the inner and outer liners from the internal fluted medium. We weigh these sheets separately to determine the combined board grade of the material.
Basis weight confirms the type of board used in a sheet of corrugate, which is directly linked to the material’s properties and strength.