Corrugated board is a material made of one or several fluted corrugated sheets glued with two flat linerboard sheets above and below.

There are two main types of corrugated board: T – single wall corrugated paperboard consisting of two flat linerboard sheets and one fluted corrugated sheet; P – double wall corrugated board consisting of three flat linerboard sheets with two fluted corrugated sheets.

Corrugated board is made of unbleached or white top liner formed to have a micro, small, medium or big flute profile. The main raw material for corrugated board production is liner and fluting.