What are the types of folds?

The types of folds can be divided into two categories: Parallel folds and cross folds. The parallel folds run in parallel fold lines, whereas the cross folds form a cross.

What is "folding" anyway?
We all know "folding" from our childhood, namely from the paper airplane. It's basically nothing more than an A4, folded at any point and *tadaaa*: It lets a sheet of paper swing through the air. Folding on our presses in the pressroom works in exactly the same way - or rather in a similar way. Well, most of the time it doesn't result in paper airplanes, but with a fold we give print products a new format without cutting, stitching or gluing. Printed sheets (paper) are
folding into certain shapes during folding. Depending on the type of fold used, this results in different numbers of breaks and pages, without the Druck product has to be bound.

 

Since "folding" offers so many exciting options for finishing printed products, we'll introduce you to a few classics today.

Parallel fold

With the parallel fold, the paper sheet is always folded in the same direction in the center in landscape or portrait format. If the paper sheet is folded twice in parallel in the middle, three breaks are created and thus eight pages.

Altar fold

With the altar fold, the fold lines also run parallel to each other. The outer parts of the sheet are folded inward without overlapping until their edges almost meet. If the paper sheet is folded twice, two breaks or six sides are created. The middle part is twice the size of an outer part. The two outer parts together form the title page.

Wrap fold

With the spiral fold, the fold lines also run parallel to each other. Unlike the parallel fold, the fold is always made in the same direction, inwards, so that the paper sheet looks like it is "wrapped". To prevent the inward-folded pages from hitting the fold, they must be one to three millimeters shorter than the reverse and title pages. If the paper sheet is folded twice, there will be two breaks and thus six pages.

Zigzag fold

In zigzag folding, two or more parts of the paper sheet are folded in alternating directions. This creates a typical zigzag pattern. If the sheet of paper is folded twice in a zigzag, two breaks are produced and thus six pages.

Cross fold

In the cross-fold process, several folds are made one after the other: The paper is folded in the center, each time offset by 90°, so that the fold breaks form a cross when the print sheet is completely open. If the paper sheet is folded twice in a cross, two breaks or eight pages are produced.

Of course, the different types of folds can also be combined with each other. This creates countless other, increasingly fancy fold types.

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