_Overcasting_, over-sewing the back edges of single leaves or weak sections.
_Peel_, a thin board on a handle used for hanging up sheets for drying.
_Plate_, an illustration printed from a plate. Term often incorrectly applied to illustrations printed from woodcuts. Any full-page illustration printed on different paper to the book is usually called a "plate."
_Pressing plates_, plates of metal japanned or nickelled, used for giving finish to the leather on a book.
_Press pin_, an iron bar used for turning the screws of presses.
_Proof_, edges left uncut as "proof" that the book has not been unduly cut down.
_Register_, (i.) when the print on one side of a leaf falls exactly over that on the other it is said to register. (ii.) Ribbon placed in a book as a marker.
_Rolling machine_, a machine in which the sheets of a book are subject to heavy pressure by being passed between rollers.
_Sawing in_, when grooves are made in the back with a saw to receive the bands.
_Semée_ or _Semis_, an heraldic term signifying sprinkled.
_Set off_, print is said to "set off" when part of the ink from a page comes off on an opposite page. This will happen if a book is pressed too soon after printing.
_Sheet_, the full size of the paper as printed, forming a section when folded.
_Signature_, the letter or figure placed on the first page of each sheet.
_Slips_, the ends of the sewing cord or tape that are attached to the boards.
_Squares_, the portion of the boards projecting beyond the edges of the book.
_Start_, when, after cutting, one or more sections of the book come forward, making the fore edge irregular, they are said to have started.
_Trimmed._ The edges of a book are said to be trimmed when the edges of the larger (or projecting) leaves only have been cut.
_Tub_, the stand which supports the lying press. Originally an actual tub to catch the shavings.
_Uncut_, a book is said to be uncut when the edges of the paper have not been cut with the plough or guillotine.
_Unopened_, the book is said to be unopened if the bolts of the sheets have not been cut.
_Waterproof sheets_, sheets of celluloid, such as are used by photographers.
_Whole binding_, when the leather covers the back and sides of a volume.