Printing and bookbinding for schools

by Samuel Jesse Vaughn

When the sewing is completed, the tapes are cut, leaving them about one and one-half inches long at each side and a colored folio, b, Fig. 20, is tipped to the top of each zigzag as at e, and the book is then ready for gluing, rounding and backing.

Rounding.

Rounding, as the name implies, is the process of giving a convex shape to the back of a book to prevent its becoming sunken or concave. The book is laid upon the table, and the first few sections are pulled firmly forward, while with a hammer, the upper edge of the back is struck lightly, driving the upper sections forward. Then the book is turned over and the process is repeated on the other side.

A folded sheet of waste paper is tipped (pasted by a very narrow strip of paste) along the sides of the book at the back.

Marks are placed about one-eighth of an inch from the back, showing the places for the edges of the backing boards between which the book is put and all clamped into the lying press, Fig. 22. This done, the back is thoroughly covered with thin glue which is rubbed in with a stiff brush and wiped as in the previous book. Within fifteen or twenty minutes, when the glue has dried sufficiently to be rubbery, the back is pounded with a hammer, striking first along the center, then gradually toward the end sections, always with a gliding blow, until the edges have been forced over the tops of the backing boards, as a, Fig. 22. If this has been properly done, the back will be smooth and rounding, and the edges will project over about the thickness of the boards.

The tapes are now pasted down against the outside leaves of the endpapers, and the super glued on, reaching from puncture to puncture, and to the ends of the tapes on each side. When dry, the endpapers, to which the tapes were pasted, are cut off around the edges of the super, a, Fig. 23. Material is now gotten ready for the cover. Since this book is to have a French joint, the boards are cut as much narrower than the book as will make the proper width of joint; and since it is to have double boards, four boards are cut, two thin and two medium. A thin board and a thicker one are glued together, all except about two inches along the back edge, to form one board. The boards, thus glued, are put into the press, and the leather cut, which is to be one and one-half inches longer than the board and wide enough to reach around the back and as far down the sides as desired—the general rule being “more than a fourth and less than a third.” This, however, is a statement of the most general kind, and proper widths for the leather are determined to meet specific conditions.

Skiving—Head Cut—Coloring.

With a sharp skiving or head knife, 5, Plate I, the edges of the leather are pared thin, and also a strip through the middle where the back of the book goes, is pared, if the leather is quite thick. For this operation, the leather should be laid on a stone or slate.

The book is now marked with pencil and trysquare where the head is to be cut, and is placed between two pressing boards with a heavy piece of cardboard, called the cut-against, between the back pressing board and the book. In this condition, the book is now put into the cutting press, Plate II, the front pressing board being pushed down on a level with the mark on the book and with the top of the press. The plow is run forward and backward, the blade meanwhile being gradually screwed toward the book, cutting only a very few leaves at a stroke. With this easy stroke and slow advance of the blade, if the blade is sharp, the head is left smooth and ready for coloring. The head is colored with India ink and when dry, is rubbed with beeswax and burnished with a burnisher made for that purpose.