Corrugated Caliper: Why is it so Important?, Technical Information Paper TIP 0304-04 (2001)
Corrugated is a very popular packaging material primarily because it has a high strength-to-weight ratio. What this means is that corrugated is exceptionally strong considering its light weight. In fact, the primary job of a corrugated box is to protect its contents (i.e., our customers’ products). As such, corrugated should be considered an engineering material.