Inset.—The pages cut off in folding and placed in the middle of the sheet.
Inside Tins.—So called from being placed inside of the boards when the volume is put in the standing-press.
Joints.—The projections formed in backing to admit the boards; applied also to the inside when the volume is covered.
Justification.—The observance that the pages of a volume agree and are parallel throughout, so as to insure a straight and equal margin.
Kettle-Stitch.—The stitch which the sewer makes at the head and tail of a book; said to be a corruption of chain-stitch.
Keys.—The little instruments used to secure the bands to the sewing-press.
Knocking-Down Iron.—So called from having the slips, when laced in, pounded down upon it, so that they will not show when the book is covered.
Laced In.—When the boards are affixed to the volume by means of the bands being passed through holes made in the boards, they are said to be laced in.
Lettering-Block.—A piece of wood, the upper surface being rounded, upon which side-labels are lettered.