Grooves (paper technique)
Creasing refers to a work process in which notches (grooves) are mechanically made in a material containing paper or cardboard, so that the material can be folded at this point in a more defined manner and with less effort. The resulting linear depression creates a bead-like elevation on the opposite side.
The method is used, for example, in the production of a brochure for a book so that the cover of the brochure can be opened more easily. Creasing is also used in the packaging industry for the production of folding boxes , cardboard boxes and beverage cartons .
Manufacturing
To produce creases, the material runs through a creasing tool. A distinction is made between rotating (rotary creasing tools) and vertically working (punching creasing tools) tools. The positive tool ( male ) is located above the material to be creased, while the material is pressed against the negative tool ( female ) on the underside .
Others
The term grooving is often wrongly used for creasing .
A creased piece of cardboard or cardboard is folded in the direction of the material displacement , so the ( concave ) creasing is then on the outside of the fold .
Alternatively, corrugated cardboard is not creased, but perforated on one side (up to about the middle of the material) in order to achieve the same weak point and tension that makes folding easier and clearly positioned.
literature
- Peter J. Biel: Book production for media salespeople and budding manufacturers . Wiley-VCH Verlag 2012, p. 200.