Corrugated boxes are made of corrugated paperboard. If you look at the edge of a cardboard corrugated box you will see a row of air columns.The paper[paper?:paper sample maker cutting machine] columns keep the corrugated box strong while the air acts as cushioning.
There are many kinds of corrugated board made by combining variations of paper, heat, adhesives and pressure.
There are different strengths of corrugated sheets – combining from one two or three layers or more of flutes and liners graded “A” at 3/8” thick to “F” at 1/32” thick.
Single wall boxes - would be made out of the sheet as it is
Double wall boxes - have two sheets glued together to make one box
Triple wall boxes – have three sheets glued together to make one box
