Folding the Leaves
Cover to Cover: Exposing the Bookbinder's Ancient Craft
As the knowledge of papermaking spread it was discovered that sheets of paper could be folded. In fact paper was pliable enough to be folded several times. This process of folding became the first step in the craft of bookbinding.
The true nature of imposture fully displayed in the life of Mahomet... Humphrey Prideaux. 1698.
The signature, shown here as F3, usually appears at the centre bottom of the first page of a folded section.
The binder had no choice as to size or layout of the book and, perhaps frustratingly, the quality of the paper upon which its text was printed. It was simply their job to follow the publisher’s or printer’s instructions. Fortunately, when it came to folding, they were guided by what was known as a signature. This printed identification mark, usually in the form of a letter from the alphabet, appeared at the bottom of the first page of what would become a folded section. If it did not end up on the outside of a section, the binder could be certain that the printed sheet had not been folded correctly. An error in the succession of the pagination will also confirm this. Here’s how the signatures were utilised when making books of different sizes:
The Folio
Comprises sheets of paper, folded once down the centre, forming two leaves and four pages. The sheets to be folded are laid out lengthwise in a pile. The signature must be on the lower left-hand corner and on the underside. A bone folder is taken in the right hand and held at the bottom of the sheet at approximately the centre. The binder’s left hand then pulls the right-hand edge of the sheet over the folder towards the left. When a careful check reveals that the print of the two pages facing each other registers exactly, the binder’s left hand holds the sheet perfectly square whilst the right uses the bone folder to crease the sheet – first from the middle upwards and away from the binder, then downwards towards the binder.
Note: each sheet of paper, once folded constitutes a section, with the exception of folios where it is common practice to make up the sections by inserting two or more sheets, one within the other.
The Quarto
Comprises sheets of paper, folded twice, forming four leaves and eight pages. As with a folio, the sheets are laid out lengthwise. In this case the signature must be on the underside of the top right-hand corner. The sheet is folded as in the folio but then it’s turned so that the crease is furthest from the binder and the right-hand side is brought over to the left. The quarto tends to be an old-fashioned fold, although it is still used for books such as family bibles, dictionaries, encyclopaedias and atlases.
The Octavo
Comprises sheets of paper, folded three times, forming eight leaves and sixteen pages. The sheets for an octavo are folded in much the same way as the folio. The signature again appears on the lower left-hand corner and on the underside. The bone folder is used to first make a folio, then the sheet is held in the middle of the first fold by the bone folder and, with the left hand, the right-hand corner is drawn over until the pagination of the opposing sheets registers. The crease is formed by running the folder off the top right-hand corner along to the left. The final fold is simply a repetition of the first fold as completed for a folio.
There are numerous other sizes and the process for folding them is virtually the same, it’s just the number of folds that changes.
In all books there exists preliminary matter: half title, title, dedication, preface pages etc. These may run over more than one sheet; they may be printed on odd sheets. It is the binder’s job to make them into an orderly section. They may have signatures but unlike the book’s pages of text, these will appear as lowercase letters. Maps or plates (full page illustrations) are also printed separately from the text, sometimes on different paper. These must be carefully put in order as per the accompanying list of plates or ‘instructions to the binder’. Where the plates are not sewn in as part of a section, they must be guarded, that is, pasted in by the inner edge onto a prepared slip of stout paper. At all times the inscription or title of the plate must be on the right-hand side of the page such that the reader will not have to reverse the book when inspecting the plates.