Perfect binding (glued bonded)

With a perfect-bound book, the printed pages are glued together to produce a durable product. Individually folded sheets are placed on top of each other, creating the inside of your book. To ensure that the glue can penetrate deep into the paper fibers, the spine is milled and roughened. Any paper dust that is there, as a result of this process, is removed. This needs to be done before the glue is applied to the outside of the book’s binding (spine of the book) using rollers or nozzles. The cover is then pressed onto the glue that has not yet completely dried. Then the other three sides are trimmed, and the glued printed product is ready. This bookbinding technique is also suitable for books that are not used intensively, such as paperbacks.

Sewn bounded books

In the sewn-stitched binding, the printing sheets are connected by means of threads. Sewn-stiched bindings are very durable, but time-consuming in terms of production and expensive, and is therefore used for high-quality works. For the sewn binding, we first fold individual printing sheets. These are then collected and sewn together. This creates the book block, which is covered with glue on the spine and trimmed on three sides. The stitched and glued book blocks can then be hung in various covers – they are joined with the cover in this process. The sewn binding allows the use of a wide variety of covers (such as hardcover). The further processing, therefore, depends on the type of cover.

Spiral Bounding

Spiral binding is also called wire-o binding, wire comb binding, or metal ring binding. In this binding technique, a wire or wire comb is pulled through a row of holes previously punched into the block. Then a spiral wire is twisted through the circular openings. A bend at the thread ends prevents the sheets from twisting out. With no other bookbinding method, the printed matter can be opened so well. The pages remain perfectly flat and can even be turned completely. The maximum number of pages depends on the diameter of the spirals and the grammage of the paper. With a large spiral diameter and low grammage, several hundred pages are no problem at all. Different printing substrates and separate sheets can be used within the block. The spirals are available in different colors and materials. When opened, a small progression occurs: motifs running through the belt do not connect neatly to each other.

PUR glued

PUR stitching is a form of bookbinding with glue and without using yarn. When printing a book, large sheets of paper are often printed on each side with sixteen book pages. The sheet is folded in half, five times, and cut loose on three sides. This leaves thirty-two book pages folded together: a quire. Grooves are milled in these sections’ spine with PUR broaching, which are then glued to the book cover with polyurethane (PUR). The PUR runs in the grooves to attach the signatures to the cover and take over the role of a staple or sewing stitch used in traditional broaching.

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