Well, from a technical perspective, the correct term is corrugated fiberboard. “Cardboard” is a generic term that includes all types of heavy-duty paper that can include card stock, paperboard, and corrugated fiberboard.
However, when the average person thinks about cardboard, the first image that pops into their head is likely corrugated fiberboard. Corrugated fiberboard is made by gluing a flat sheet of paper to a corrugated (wavy) sheet of paper. The waves are known as fluting, and each individual wave is a flute. All corrugated will have a wavy texture when viewed from the side.
This eBook is broken into 11 chapters to inform you about the basics of the cardboard industry and additional resources if you wish delve further into the industry.