Corrugated board (aaltopahvi)

Corrugated board is used in packaging and is made to withstand outdoor conditions. It is used, among others, in ordinary transport boxes. Corrugated board generally consists of two smooth layers or liners, or of stronger kraftliner, and a corrugated layer between them, but a double corrugated board contains two corrugated layers between three liners. The intermediate layer of corrugated board is made of fluting.