Corrugation refers to the process of manufacturing corrugated cardboard, a durable and lightweight material used primarily for packaging and shipping. The corrugated board is made by sandwiching a fluted (wavy) sheet between one or two flat linerboards, giving it strength, cushioning, and rigidity. This structure provides excellent protection for goods during handling, transport, and storage.

The corrugation process typically involves high-speed machines known as corrugators, which shape, glue, and laminate the fluted medium with liner sheets. These boards are then cut, folded, and printed to create a wide variety of corrugated boxes and cartons tailored to customer requirements. The most common types include single-wall, double-wall, and triple-wall boards, each offering varying degrees of strength and durability.