To test if the leather has been sufficiently pared, fold it over where the edge of the board will come, and run the finger along the folded leather. If the paring has been done properly it will feel quite even the whole length of the fold; but if there are any irregularities, they will be very apparent, and the paring must be gone over again till they have disappeared. When even, the book must be again laid on the leather with the boards open, and a pencil line drawn round as before. If there are leather joints they will have been pared before the book was sewn, and care must be taken in paring the turn-in of the cover that it is of the same thickness as the leather joint, or it will be impossible to make a neat mitre at the back corners.
COVERING
Before covering, the book must be looked at to see that the bands are quite square and at equal distances apart. Any slight errors in this respect can be corrected by holding the book in the lying press between backing boards and gently tapping the bands from one side or the other with a piece of wood struck with a hammer. This is best done when the back is cleaned off, but by damping the bands slightly it may be done just before covering. The squares must be looked to, and the edges of the board well rubbed with a folder, or tapped with a hammer, to remove any burr that may have been caused by the plough knife, or any chance blow. The back is then moistened with paste, or, in the case of a very large book, with thin glue, and left to soak. The cover can then be well pasted with thickish paste, that has been previously well beaten up. When the cover is pasted, it can be folded with the pasted sides together and left to soak for a few minutes while the back is again looked to, and any roughness smoothed down with the folder. Before covering, the bands should be nipped up with band nippers (see fig. 61) to make sure that they are sharp. The coverer should have ready before covering a clean paring stone, one or two folders, a pair of nickeled-band nippers, a clean sponge, a little water in a saucer, a piece of thread, and a strip of smooth wood (boxwood for preference), called a band stick, used for smoothing the leather between the bands, a pair of scissors, and a small sharp knife, a pair of waterproof sheets the size of the book, and, if the book is a large one, a pair of tying up boards, with tying up string, and two strips of wood covered in blotting-paper or leather. It is best to have the band nippers for covering nickeled to prevent the iron from staining the leather. The waterproof sheets recommended are thin sheets of celluloid, such as are used by photographers.
[Ill.u.s.tration: FIG. 61.]
When these things are ready, the pasted cover should be examined and repasted if it has dried in any place. The amount of paste to be used for covering can only be learned by experience. A thick leather will take more than a thin one, but, provided the cover sticks tight at every point, the less paste used the better. If there is too much, it will rub up and make very ugly, uneven places under the leather; and if there is too little, the cover will not stick.
[Ill.u.s.tration: FIG. 62.]
Take the pasted cover and look to see which is the better side of the leather. Lay the front of the book down on this exactly up to the marks that show the beginning of the turn-in. Then draw the leather over the back and on to the other side, pulling it slightly, but not dragging it. Then stand the book on its fore-edge on a piece of waste paper, with the leather turned out on either side, as shown at fig.
62, and nip up the bands with nickeled band nippers (see fig. 63).
After this is done there will probably be a good deal of loose leather on the back. This can be got rid of by dragging the leather on to the side; but by far the better plan, when the back is large enough to allow it, is to work up the surplus leather on to the back between the panels. This requires a good deal of practice, and is very seldom done; but it can be done with most satisfactory results. The book should now have the leather on the back stretched lengthways to make it cover the bands, but not stretched the other way, and the leather on the boards should lie perfectly flat and not be stretched at all.
The leather on the fore-edge of the board is then rubbed with the hand on the outside, and then on to the edge, and then on the inside. The edge and the inside are smoothed down with a folder, and any excessive paste on the inside squeezed out and removed. When the fore-edge of both boards has been turned in, the head and tail must also be turned in. A little paste is put on to that part of the leather that will turn in below the headband, and this portion is neatly tucked in between the boards and the back. The turned-in edge must lie quite evenly, or it will result in a ridge on the back. The leather is turned in on the two boards in the same way as described for the fore-edge, and the edge rubbed square with a folder. At fig. 64 is shown a convenient form of folder for covering. At the corners the leather must be pulled over as far as possible with two folders meeting at the extreme point, the object being to avoid a cut in the leather at the corner of the board. The folds so formed must be cut off with the scissors (see fig. 65, A), then one edge tucked neatly under the other, (B). Care must be taken throughout not to soil the edges of the leaves.
[Ill.u.s.tration: FIG. 63.]
[Ill.u.s.tration: FIG. 64.]
At the headband the fold of leather, pared thin for the purpose, must be squeezed together with a folder and pulled out a little to leave an even projection that can be turned over to form a head-cap. When both ends have been turned in, in this way, the boards must each be opened and pressed against a straight-edge held in the joint (fig. 66) to ensure that there is enough leather in the turn-in of the joint to allow the cover to open freely; and the leather of the turn-in at the head and tail must be carefully smoothed down with a folder.
[Ill.u.s.tration: FIG. 65.]
[Ill.u.s.tration: FIG. 66.]
[Ill.u.s.tration: FIG. 67.]
The book may now be shut up if a waterproof sheet is put at each end to prevent the damp of the cover from c.o.c.kling the paper. It must then be stood on its fore-edge and the bands again nipped up with a pair of nickeled band nippers, and the panels between the bands well pressed down with the band stick to cause the leather to stick at every point.
A piece of thread is tied round the back from head to tail, squeezing the leather in the gap caused by the corners of the board having been cut off. The book is then turned up on end, resting the tail on a folder or anything that will keep the projecting leather for the head-cap from being prematurely flattened. The head-caps (fig. 67) must now be set. To do this the first finger of the left hand is placed behind it, and a sharp folder is pressed into the corners of the head-cap between the headband and the thread. The leather is then tapped over the headband, and the whole turned over on the stone and rubbed at the back with a folder. This operation requires great nicety. The shape of head-cap is shown at fig. 67. The nice adjustment of head-caps and corners, although of no constructional value, are the points by which the forwarding of a book is generally valued.
[Ill.u.s.tration: FIG. 68.]
If the book is a large one, it will be best to tie it up. The method of tying up is shown in fig. 68. The tying up cords will make marks at the side of the bands, that are not unpleasant on a large book. If they are objected to, it is best to tie the book up for about half-an-hour, and then to untie it, and smooth out the marks with the band stick. Even with small books, if the leather seems inclined to give trouble, it is well to tie them up for a short time, then to untie them, to smooth out any marks or inequalities, and to tie them up again.
MITRING CORNERS AND FILLING IN
A book that has been covered should be left under a light weight until the next day, with waterproof sheets between the damp cover and the end paper to prevent the sheets of the book from c.o.c.kling through the damp. When the cover is thoroughly set the boards should be carefully opened, pressing them slightly to the joint to ensure a square and even joint. If, as is sometimes the case, the turn-in of the leather over the joint seems to be inclined to bind, the cover should be merely opened half-way, and the leather of the turns-in of the joint damped with a sponge, and left to soak for a short time, and then the cover can usually be opened without any dragging. A section of a good joint is shown at fig. 69, A, and a bad one at B.
[Ill.u.s.tration: FIG. 69.]
[Ill.u.s.tration: FIG. 70.]
The next operation will be to fill in the board and mitre the corners.
To fill in the boards, a piece of paper as thick as the turn-in of the leather (engineer"s cartridge paper answers very well) should be cut a little smaller than the board, with one edge cut straight; then with the straight edge adjusted to the back of the board, and a weight placed on the centre, the paper is marked round with dividers set to the intended width of the turn-in of the leather. Then with a sharp knife, paper and leather may be cut through together. The paper should then be marked to show its position on the board, and the ragged edges of the leather trimmed off. This will leave an even margin of leather on three sides of the inside of the board, and a piece of paper that will exactly fit the remaining s.p.a.ce. The corners must next be mitred. To do this, both thicknesses of leather are cut through from the corner of the board to the corner of the inside margin. The knife should be held slightly slanting to make a cut, as shown at fig. 70.
The corners should then be thoroughly damped, and the overlapping leather from both sides removed, leaving what should be a neat and straight join. If the leather at the extreme corner should prove to be, as is often the case, too thick to turn in neatly, the corners should be opened out and the leather pared against the thumb nail, and then well pasted and turned back again. The extreme corner may be slightly tapped on the stone with a hammer, and the sides rubbed with a folder, to ensure squareness and sharpness. When all four corners have been mitred, the filling in papers can be pasted in. As they will probably stretch a little with the paste, it will be well to cut off a slight shaving, and they should then fit exactly. When the boards have been filled in and well rubbed down, the book should be left for some hours with the boards standing open to enable the filling-in papers to draw the boards slightly inwards to overcome the pull of the leather.
In cases where there are leather joints the operation is as follows: The waste end paper is removed, and the edge of the board and joint carefully cleaned from glue and all irregularities, and if, as is most likely, it is curved from the pull of the leather, the board must be tapped or ironed down until it is perfectly straight. If there is difficulty in making the board lie straight along the joint before pasting down, it will be well first to fill in with a well pasted and stretched thin paper, which, if the boards are left open, will draw them inwards. If the leather joint is pasted down while the board is curved, the result will be a most unsightly projection on the outside.
When the joint has been cleaned out, and the board made to lie flat, the leather should be pasted down and mitred. The whole depth of the turn-in of the covering leather in the joint must not be removed, or it will be unduly weakened. The mitring line should not come from the extreme corner, but rather farther down, and there it is well to leave a certain amount of overlap in the joint, for which purpose the edge of the turn-in leather and the edge of the leather joint should be pared thin. After pasting down the leather joints the boards should be left open till they are dry (see fig. 71). The turn-in and leather joint are then trimmed out, leaving an even margin of leather all round the inside of the board, and the panel in the centre filled in with a piece of thick paper.
[Ill.u.s.tration: FIG. 71.]
When corners and filling in are dry, the boards may be shut up, and the book is ready for finishing.
It is a common practice to wash up the covers of books that have become stained with a solution of oxalic acid in water. This is a dangerous thing to do, and is likely to seriously injure the leather.
Leather, when damp, must not be brought in contact with iron or steel tools, or it may be badly stained.
CHAPTER XIII
Library Binding--Binding very Thin Books--Sc.r.a.p-Books--Binding on Vellum--Books covered with Embroidery
LIBRARY BINDING
_Specifications III and IV_
To produce cheaper bindings, as must be done in the case of large libraries, some alteration of design is necessary. Appearance must to some extent be sacrificed to strength and durability, and not, as is too often the case, strength and durability sacrificed to appearance.
The essentials of any good binding are, that the sections should be sound in themselves, and that there should be no plates or odd sheets "pasted on," or anything that would prevent any leaf from opening right to the back; the sewing must be thoroughly sound; the sewing materials of good quality; the slips firmly attached to the boards; and the leather fairly thick and of a durable kind, although for the sake of cheapness it may be necessary to use skins with flaws on the surface. Such flawed skins cost half, or less than half, the price of perfect skins, and surface flaws do not injure the strength of the leather. By sewing on tape, great flexibility of the back is obtained, and much time, and consequent expense, in covering is saved. By using a French joint much thicker leather than usual can be used, with corresponding gain in strength.
To bind an octavo or smaller book according to the specification given (III, page 307); first make all sections sound, and guard all plates or maps. Make end papers with zigzags. After the sections have been thoroughly pressed, the book will be ready for marking up and sewing.
In marking up for sewing on tapes, two marks will be necessary for each tape. When there are several books of the same size to be sewn, they may be placed one above the other in the sewing press, and sewn on to the same tapes. It will be found that the volumes when sewn can easily be slid along the tapes, which must be long enough to provide sufficient for the slips of each. The split boards may be "made" of a thin black mill-board with a thicker straw-board. To "make" a pair of split boards the pieces of straw-and mill-board large enough to make the two are got out, and the straw-board well glued, except in the centre, which should previously be covered with a strip of thin mill-board or tin about four inches wide. The strip is then removed, and the thin black board laid on the glued straw-board and nipped in the press. When dry, the made board is cut down the centre, which will leave two boards glued together all over except for two inches on one side of each. The boards then are squared to the book in a mill-board machine. The back of the book is glued up, and in the ordinary way rounded and backed. The edges may be cut with a guillotine. The ends of the tapes are glued on the waste end paper, which should be cut off about an inch and a half from the back. The split boards are then opened and glued, and the waste end papers with slips attached are placed in them (see fig. 72), and the book nipped in the press. To form a "French joint" the boards should be kept about an eighth of an inch from the back of the book. The book is then ready for covering.
The leather must not be pared too thin, as the French joint will give plenty of play and allow the use of much thicker leather than usual.
If time and money can be spared, headbands can be worked, but they are not absolutely necessary, and a piece of string may be inserted into the turning of the leather at head and tail in the place of them. When the book is covered, a piece of string should be tied round the joints, and the whole given a nip in the press. The corners of the boards should be protected by small tips of vellum or parchment. The sides may be covered with good paper, which will wear quite as well as cloth, look better, and cost less.
[Ill.u.s.tration: FIG. 72.]
The lettering of library books is very important (see Chapter XV).
BINDING VERY THIN BOOKS
Books consisting of only one section may be bound as follows:--A sheet of paper to match the book, and two coloured sheets for end papers, are folded round the section, and a "waste" paper put over all. A strip of linen is pasted to the back of the waste, and the whole sewn together by st.i.tching through the fold. The waste may be cut off and inserted with the linen in a split board, as for library bindings. The back edges of the board should be filed thin, and should not be placed quite up to the back, to allow for a little play in the joints.
The leather is put on in the ordinary way, except that the linen at the head and tail must be slit a little to allow for the turn in. If waterproof sheets are first inserted, the ends may be pasted, the boards shut, and the book nipped in the press. By subst.i.tuting a piece of thin leather for the outside coloured paper, a leather joint can be made.
Sc.r.a.p-BOOKS
Sc.r.a.p-books, into which autograph letters, sketches, or other papers can be pasted, may be made as follows:--Enough paper of good quality is folded up to the size desired, and pieces of the same paper, of the same height, and about two inches wide, are folded down the centre and inserted between the backs of the larger sheets, as shown at fig. 73.
It is best not to insert these smaller pieces in the centre of the section, as they would be troublesome in sewing. If, after sewing, the book is filled up with waste paper laid between the leaves, it will make it manageable while being forwarded.
It is best to use a rather darkly-toned or coloured paper, as, if a quite white paper is used, any letters or papers that have become soiled, will look unduly dirty.