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Bookbinding is a craft technique for connecting the individual pages of a book into a single volume. It is practiced both on a high intensity commercial level to produce the millions of books which are printed every year, or it can be performed by hand, by artisans who are creating one of a kind books. Bookbinding is an ancient technique, with examples of bound books in durable materials like vellum dating back thousands of years.
Whether books are being bound for large scale commercial sale or special occasions, bookbinding involves a few basic principles. The pages are printed, using a technique called imposition where up to sixteen pages are printed front to back onto one sheet of paper called a signature. The signature is folded into a section of text which is then bound and trimmed to free the folded edges. A short book may only contain one signature, while lengthy texts may have hundreds. The signatures are bound together with heavy waxed thread so that they cannot pull apart, although some modern bookbinding techniques use glue instead because it is cheaper and much quicker.
Finally, the bound pages are enclosed inside a protective cover which is designed to be sturdy and durable, preventing damage to the inside of the book. This stage of bookbinding leaves the most room for creativity and fun on the part of the artist. At one time, book covers were often beautiful and ornate, made from materials like leather or wood, and embossed or studded with gems. Modern commercially produced books usually have covers made from sturdy paper or cardboard, but it is still possible to find deluxe books bound in leather for special collections.
In antiquity, books were bound in volumes, rather than all together. Each volume was called a codex, and collectors would purchase books one codex at a time. The use of codices explains why sections of ancient texts are missing, due to poorly preserved codices. Classics students are also familiar with a folio, which is a type of oversized book. A folio was typically produced by printing a signature that had only two pages, so the paper was just folded in half, yielding a very large volume. Folios are still used today, and are ideal for printing maps, technical drawings, and other material which needs a larger page.
As a craft, bookbinding plays an important role in the production of artist's books, the preservation of antique books, and in training for fine arts students. As a commercial process, bookbinding plays a role in the lives of any consumer who picks up a book or magazine. Advances in commercial bookbinding techniques have greatly improved the cost, and therefore accessibility, of printed material all over the world.