Medium is the corrugated paper positioned between the linerboards in a corrugated board structure. It is fluted—formed into wave-shaped corrugations—by a corrugating machine. The medium’s primary role is to create the corrugated structure that provides cushioning, structural support, and overall rigidity. The quality, fiber composition, and flute forming of the medium directly affect the board’s compression strength, durability, and cushioning performance, making it a critical material in corrugated board production.
