Читать книгу Bookbinding, and the Care of Books - Douglas Cockerell - Страница 9

Books received in sheets must be folded. Folding requires care, or the margins of different leaves will be unequal, and the lines of printing not at right angles to the back.

Books of various sizes are known as “folio,” “quarto,” “octavo,” “duodecimo,” &c. These names signify the number of folds, and consequently the number of leaves the paper has been folded into. Thus, a folio is made up of sheets of paper folded once down the centre, forming two leaves and four pages. The sheets of a quarto have a second fold, making four leaves and eight pages, and in an octavo the sheet has a third fold, forming eight leaves and sixteen pages (see fig. 2), and so on. Each sheet of paper when folded constitutes a section, except in the case of folios, where it is usual to make up the sections by inserting two or more sheets, one within the other.

Paper is made in several named sizes, such as “imperial,” “royal,” “demy,” “crown,” “foolscap,” &c. (see p. 283), so that the terms “imperial folio” or “crown octavo” imply that a sheet of a definite size has been folded a definite number of times.

Fig. 2.

Besides the traditional sizes, paper is now made of almost any length and width, resulting in books of odd shape, and the names folio, quarto, &c., are rather losing their true meaning, and are often used loosely to signify pages of certain sizes, irrespective of the number that go to a sheet.

On receipt, for instance, of an octavo book for folding, the pile of sheets is laid flat on the table, and collated by the letter or signature of each sheet. The first sheet of the book proper will probably be signature B, as signature A usually consists of the half-title, title, introduction, &c., and often has to be folded up rather differently.

The “outer” sides, known by the signature letters B, C, D, &c., should be downwards, and the inner sides facing upwards with the second signatures, if there are any, B2, C2, D2, &c., at the right-hand bottom corner.

The pages of an octave book, commencing at page 1, are shown at fig. 3. A folder is taken in the right hand, and held at the bottom of the sheet at about the centre, and the sheet taken by the left hand at the top right-hand corner and bent over until pages 3 and 6 come exactly over pages 2 and 7; and when it is seen that the headlines and figures exactly match, the paper, while being held in that position, is creased down the centre with the folder, and the fold cut up a little more than half-way. Pages 4, 13, 5, 12 will now be uppermost; pages 12 and 5 are now folded over to exactly match pages 13 and 4, and the fold creased and cut up a little more than half-way, as before. Pages 8 and 9 will now be uppermost, and will merely require folding together to make the pages of the section follow in their proper order. If the folding has been done carefully, and the “register” of the printing is good, the headlines should be exactly even throughout.

Fig. 3.

The object of cutting past the centre at each fold is to avoid the unsightly creasing that results from folding two or more thicknesses of paper when joined at the top edge.

A “duodecimo” sheet has the pages arranged as at fig. 4.

The “inset” pages, 10, 15, 14, 11, must be cut off, and the rest of the section folded as for an octavo sheet. The inset is folded separately and inserted into the centre of the octavo portion.

Other sizes are folded in much the same way, and the principle of folding one sheet having been mastered, no difficulty will be found in folding any other.

Plates often require trimming, and this must be done with judgment. The plates should be trimmed to correspond as far as possible with the printing on the opposite page, but if this cannot be done, it is desirable that something approaching the proportion of margin shown at fig. 2 (folio) should be aimed at. That is to say, the back margin should be the smallest, the head margin the next, the fore-edge a little wider, and the tail widest of all. When a plate consists of a small portrait or diagram in the centre of the page, it looks better if it is put a little higher and a little nearer the back than the actual centre.

Fig. 4.

Plates that have no numbers on them must be put in order by the list of printed plates, or “instructions to the binder.” The half-title, title, dedication, &c., will often be found to be printed on odd sheets that have to be made up into section A. This preliminary matter is usually placed in the following order: Half-title, title, dedication, preface, contents, list of illustrations or other lists. If there is an index, it should be put at the end of the book.

All plates should be “guarded,” and any “quarter sections,” that is, sections consisting of two leaves, should have their backs strengthened by a “guard,” or they may very easily be torn in the sewing. Odd, single leaves may be guarded round sections in the same way as plates.

When a book has been folded, it should be pressed (see p. 87).

There will sometimes be pages marked by the printer with a star. These have some error in them, and are intended to be cut out. The printer should supply corrected pages to replace them.