Corrugated Cardboard is a material consisting of a fluted corrugated sheet and one or more flat linerboards. The fluted corrugated sheets and linerboards are laminated together in a corrugator to produce the boxes we all know and use for packing, shipping and storage. The quality of the boxes produced are due to two main factors, the quality of the corrugated and linerboards and the flute types. Most linerboards are test liners (recycled paper) or kraft liners (various grades). Fluting types very from "B", "C", "E" etc. with C-Flute being the most commonly used flute type in Corrugated Boxes.
Boxes with a Single Fluting between two linerboards (Single Wall) are most commonly used for standard Moving and Packaging purposes. Boxes with a Double Fluting surrounded by linerboards (Double Wall) are used for heavier and more fragile items or long distance shipping.