Section-Sewn Binding

Section sewing is hundreds of years old. Before industrial book production, books were almost universally sewn together by hand. Gatherings (or signatures) were sewn onto cords or leather thongs, which were then laced into wooden boards to create the covers. Many of these books are still perfectly usable after 300–500 years.

Perfect binding (glued paperbacks) wasn't adopted because it was better. It was adopted because it was faster and cheaper. Section sewing is more labour-intensive because each signature has to be sewn before the cover is attached. Adhesive binding reduced manufacturing costs and enabled mass-market paperbacks. So today, choosing section sewing is often a conscious decision to prioritise longevity over production cost.

How it’s done

Many people imagine someone sitting with a needle. Modern section sewing is performed by highly specialised machines capable of sewing thousands of folded signatures per hour while maintaining remarkable accuracy. With a sewn book, the text block opens from the sewn folds, so the movement is distributed throughout the sections. With an adhesive-only book, the glue has to flex every time the book opens. Over years of use, that's what eventually leads to pages loosening or detaching.

Why the art world loves it

As you turn the pages, the weight of the book gradually transfers from one side to the other. Because the sections are sewn together, the spine is able to flex naturally, allowing the book to open comfortably without placing excessive stress on the binding. This flexibility also helps the pages lie flatter when open, making the book easier to read and reducing the amount of content lost in the gutter.

When to use it

While section sewing is often associated with substantial hardcover books, even relatively slim publications benefit from the added flexibility and durability. A sewn spine opens more naturally, feels better in the hand, and stands up to repeated use far better than adhesive-only binding.

One thing printers often mention is the feel. People can rarely explain why one hardcover feels "better" than another. Often it's because a sewn binding has a softer, more natural opening action. The book almost invites itself open rather than fighting against the reader.