Planer.—A smooth block of wood used for levelling the surface of pages of type when imposed.
Planing down.—To bring down types evenly on their feet, by laying a planer on the page and striking it firmly with a mallet.
Platen.—The part of a printing-press which, acted upon by the lever, gives the impression to a sheet.
Point-holes.—Fine holes made by the points to register the second impression by
Points.—Two thin pieces of steel with a point at one end, adjusted to the tympan with screws, to make register.
Quadrate.—A low square blank type, used to indent the first line of a paragraph, and to fill up blank spaces.
Quarters.—Octavos and twelves are said to be imposed in quarters, not from their equal divisions, but because they are imposed and locked up in four parts.
Quarto, or 4to.—Four pages to a form.
Quire.—Twenty-four sheets of paper.