Adviser about Folding boxes

The thickness of folding boxboard is an essential quality factor, as uniform thickness is a prerequisite for the flawless production of folding boxes. Uniform board thickness must therefore be ensured for various processing steps, such as die cutting. The thickness of the cardboard is determined in accordance with DIN ISO 534 – this standard deals with the determination of the thickness, density and specific volume of paper and cardboard. The thickness/strength is measured in µm.

The specific volume of a cardboard box, on the other hand, refers to the ratio between the thickness of the cardboard and its mass per unit area (grammage). It therefore describes the volume of the box in cubic centimetres per gram (cm³/g). If the specific volume of a material is higher, this means that less mass is distributed over a given area for the same thickness. In other words, the greater the specific volume, the lighter the material per unit area. This relationship between specific volume and areal mass shows that, at approximately constant thickness, a higher specific volume number results in a lower mass per unit area.